diff --git a/.github/CODEOWNERS b/.github/CODEOWNERS
new file mode 100644
index 00000000..30fdb7b9
--- /dev/null
+++ b/.github/CODEOWNERS
@@ -0,0 +1,10 @@
+# Code owners file.
+# This file controls who is tagged for review for any given pull request.
+
+# For syntax help see:
+# https://help.github.com/en/github/creating-cloning-and-archiving-repositories/about-code-owners#codeowners-syntax
+
+*                       @googleapis/yoshi-java
+
+# The java-samples-reviewers team is the default owner for samples changes
+samples/**/*.java       @googleapis/java-samples-reviewers
diff --git a/.github/ISSUE_TEMPLATE/bug_report.md b/.github/ISSUE_TEMPLATE/bug_report.md
new file mode 100644
index 00000000..df5ef408
--- /dev/null
+++ b/.github/ISSUE_TEMPLATE/bug_report.md
@@ -0,0 +1,51 @@
+---
+name: Bug report
+about: Create a report to help us improve
+
+---
+
+Thanks for stopping by to let us know something could be better!
+
+**PLEASE READ**: If you have a support contract with Google, please create an issue in the [support console](https://cloud.google.com/support/) instead of filing on GitHub. This will ensure a timely response.
+
+Please run down the following list and make sure you've tried the usual "quick fixes":
+
+  - Search the issues already opened: https://github.com/googleapis/java-retail/issues
+  - Check for answers on StackOverflow: http://stackoverflow.com/questions/tagged/google-cloud-platform
+
+If you are still having issues, please include as much information as possible:
+
+#### Environment details
+
+1. Specify the API at the beginning of the title. For example, "BigQuery: ...").
+   General, Core, and Other are also allowed as types
+2. OS type and version:
+3. Java version:
+4. retail version(s):
+
+#### Steps to reproduce
+
+  1. ?
+  2. ?
+
+#### Code example
+
+```java
+// example
+```
+
+#### Stack trace
+```
+Any relevant stacktrace here.
+```
+
+#### External references such as API reference guides
+
+- ?
+
+#### Any additional information below
+
+
+Following these steps guarantees the quickest resolution possible.
+
+Thanks!
diff --git a/.github/ISSUE_TEMPLATE/feature_request.md b/.github/ISSUE_TEMPLATE/feature_request.md
new file mode 100644
index 00000000..754e30c6
--- /dev/null
+++ b/.github/ISSUE_TEMPLATE/feature_request.md
@@ -0,0 +1,21 @@
+---
+name: Feature request
+about: Suggest an idea for this library
+
+---
+
+Thanks for stopping by to let us know something could be better!
+
+**PLEASE READ**: If you have a support contract with Google, please create an issue in the [support console](https://cloud.google.com/support/) instead of filing on GitHub. This will ensure a timely response.
+
+**Is your feature request related to a problem? Please describe.**
+What the problem is. Example: I'm always frustrated when [...]
+
+**Describe the solution you'd like**
+What you want to happen.
+
+**Describe alternatives you've considered**
+Any alternative solutions or features you've considered.
+
+**Additional context**
+Any other context or screenshots about the feature request.
diff --git a/.github/ISSUE_TEMPLATE/support_request.md b/.github/ISSUE_TEMPLATE/support_request.md
new file mode 100644
index 00000000..99586903
--- /dev/null
+++ b/.github/ISSUE_TEMPLATE/support_request.md
@@ -0,0 +1,7 @@
+---
+name: Support request
+about: If you have a support contract with Google, please create an issue in the Google Cloud Support console.
+
+---
+
+**PLEASE READ**: If you have a support contract with Google, please create an issue in the [support console](https://cloud.google.com/support/) instead of filing on GitHub. This will ensure a timely response.
diff --git a/.github/PULL_REQUEST_TEMPLATE.md b/.github/PULL_REQUEST_TEMPLATE.md
new file mode 100644
index 00000000..3c57d8ef
--- /dev/null
+++ b/.github/PULL_REQUEST_TEMPLATE.md
@@ -0,0 +1,7 @@
+Thank you for opening a Pull Request! Before submitting your PR, there are a few things you can do to make sure it goes smoothly:
+- [ ] Make sure to open an issue as a [bug/issue](https://github.com/googleapis/java-retail/issues/new/choose) before writing your code!  That way we can discuss the change, evaluate designs, and agree on the general idea
+- [ ] Ensure the tests and linter pass
+- [ ] Code coverage does not decrease (if any source code was changed)
+- [ ] Appropriate docs were updated (if necessary)
+
+Fixes #<issue_number_goes_here> ☕️
diff --git a/.github/blunderbuss.yml b/.github/blunderbuss.yml
new file mode 100644
index 00000000..1a23ea42
--- /dev/null
+++ b/.github/blunderbuss.yml
@@ -0,0 +1,7 @@
+# Configuration for the Blunderbuss GitHub app. For more info see
+# https://github.com/googleapis/repo-automation-bots/tree/master/packages/blunderbuss
+assign_prs_by:
+- labels:
+  - samples
+  to:
+  - googleapis/java-samples-reviewers
\ No newline at end of file
diff --git a/.github/generated-files-bot.yml b/.github/generated-files-bot.yml
new file mode 100644
index 00000000..20f3acc2
--- /dev/null
+++ b/.github/generated-files-bot.yml
@@ -0,0 +1,7 @@
+externalManifests:
+- type: json
+  file: 'synth.metadata'
+  jsonpath: '$.generatedFiles[*]'
+- type: json
+  file: '.github/readme/synth.metadata/synth.metadata'
+  jsonpath: '$.generatedFiles[*]'
diff --git a/.github/readme/synth.py b/.github/readme/synth.py
new file mode 100644
index 00000000..7b48cc28
--- /dev/null
+++ b/.github/readme/synth.py
@@ -0,0 +1,19 @@
+# Copyright 2020 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""This script is used to synthesize generated the README for this library."""
+
+from synthtool.languages import java
+
+java.custom_templates(["java_library/README.md"])
diff --git a/.github/release-please.yml b/.github/release-please.yml
new file mode 100644
index 00000000..dce2c845
--- /dev/null
+++ b/.github/release-please.yml
@@ -0,0 +1,2 @@
+releaseType: java-yoshi
+bumpMinorPreMajor: true
\ No newline at end of file
diff --git a/.github/snippet-bot.yml b/.github/snippet-bot.yml
new file mode 100644
index 00000000..e69de29b
diff --git a/.github/trusted-contribution.yml b/.github/trusted-contribution.yml
new file mode 100644
index 00000000..f247d5c7
--- /dev/null
+++ b/.github/trusted-contribution.yml
@@ -0,0 +1,2 @@
+trustedContributors:
+- renovate-bot
\ No newline at end of file
diff --git a/.github/workflows/approve-readme.yaml b/.github/workflows/approve-readme.yaml
new file mode 100644
index 00000000..7513acae
--- /dev/null
+++ b/.github/workflows/approve-readme.yaml
@@ -0,0 +1,54 @@
+on:
+  pull_request:
+name: auto-merge-readme
+jobs:
+  approve:
+    runs-on: ubuntu-latest
+    if: github.repository_owner == 'googleapis' && github.head_ref == 'autosynth-readme'
+    steps:
+      - uses: actions/github-script@v3
+        with:
+          github-token: ${{secrets.YOSHI_APPROVER_TOKEN}}
+          script: |
+            // only approve PRs from yoshi-automation
+            if (context.payload.pull_request.user.login !== "yoshi-automation") {
+              return;
+            }
+
+            // only approve PRs like "chore: release <release version>"
+            if (!context.payload.pull_request.title === "chore: regenerate README") {
+              return;
+            }
+
+            // only approve PRs with README.md and synth.metadata changes
+            const files = new Set(
+              (
+                await github.paginate(
+                  github.pulls.listFiles.endpoint({
+                    owner: context.repo.owner,
+                    repo: context.repo.repo,
+                    pull_number: context.payload.pull_request.number,
+                  })
+                )
+              ).map(file => file.filename)
+            );
+            if (files.size != 2 || !files.has("README.md") || !files.has(".github/readme/synth.metadata/synth.metadata")) {
+              return;
+            }
+
+            // approve README regeneration PR
+            await github.pulls.createReview({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              body: 'Rubber stamped PR!',
+              pull_number: context.payload.pull_request.number,
+              event: 'APPROVE'
+            });
+
+            // attach automerge label
+            await github.issues.addLabels({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              issue_number: context.payload.pull_request.number,
+              labels: ['automerge']
+            });
diff --git a/.github/workflows/auto-release.yaml b/.github/workflows/auto-release.yaml
new file mode 100644
index 00000000..2b6cdbc9
--- /dev/null
+++ b/.github/workflows/auto-release.yaml
@@ -0,0 +1,88 @@
+on:
+  pull_request:
+name: auto-release
+jobs:
+  approve:
+    runs-on: ubuntu-latest
+    if: contains(github.head_ref, 'release-v')
+    steps:
+    - uses: actions/github-script@v3
+      with:
+        github-token: ${{secrets.YOSHI_APPROVER_TOKEN}}
+        debug: true
+        script: |
+          // only approve PRs from release-please[bot]
+          if (context.payload.pull_request.user.login !== "release-please[bot]") {
+            return;
+          }
+
+          // only approve PRs like "chore: release <release version>"
+          if ( !context.payload.pull_request.title.startsWith("chore: release") ) {
+            return;
+          }
+
+          // only approve PRs with pom.xml and versions.txt changes
+          const filesPromise = github.pulls.listFiles.endpoint({
+            owner: context.repo.owner,
+            repo: context.repo.repo,
+            pull_number: context.payload.pull_request.number,
+          });
+          const changed_files = await github.paginate(filesPromise)
+
+          if ( changed_files.length < 1 ) {
+            console.log( "Not proceeding since PR is empty!" )
+            return;
+          }
+
+          if ( !changed_files.some(v => v.filename.includes("pom")) || !changed_files.some(v => v.filename.includes("versions.txt")) ) {
+            console.log( "PR file changes do not have pom.xml or versions.txt -- something is wrong. PTAL!" )
+            return;
+          }
+
+          // trigger auto-release when
+          // 1) it is a SNAPSHOT release (auto-generated post regular release)
+          // 2) there are dependency updates only
+          // 3) there are no open dependency update PRs in this repo (to avoid multiple releases)
+          if (
+            context.payload.pull_request.body.includes("Fix") ||
+            context.payload.pull_request.body.includes("Build") ||
+            context.payload.pull_request.body.includes("Documentation") ||
+            context.payload.pull_request.body.includes("BREAKING CHANGES") ||
+            context.payload.pull_request.body.includes("Features")
+          ) {
+            console.log( "Not auto-releasing since it is not a dependency-update-only release." );
+            return;
+          }
+
+          const promise = github.pulls.list.endpoint({
+            owner: context.repo.owner,
+            repo: context.repo.repo,
+            state: 'open'
+          });
+          const open_pulls = await github.paginate(promise)
+
+          if ( open_pulls.length > 1 && !context.payload.pull_request.title.includes("SNAPSHOT") ) {
+            for ( const pull of open_pulls ) {
+              if ( pull.title.startsWith("deps: update dependency") ) {
+                console.log( "Not auto-releasing yet since there are dependency update PRs open in this repo." );
+                return;
+              }
+            }
+          }
+
+          // approve release PR
+          await github.pulls.createReview({
+            owner: context.repo.owner,
+            repo: context.repo.repo,
+            body: 'Rubber stamped release!',
+            pull_number: context.payload.pull_request.number,
+            event: 'APPROVE'
+          });
+
+          // attach kokoro:force-run and automerge labels
+          await github.issues.addLabels({
+            owner: context.repo.owner,
+            repo: context.repo.repo,
+            issue_number: context.payload.pull_request.number,
+            labels: ['kokoro:force-run', 'automerge']
+          });
diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
new file mode 100644
index 00000000..68302207
--- /dev/null
+++ b/.github/workflows/ci.yaml
@@ -0,0 +1,79 @@
+on:
+  push:
+    branches:
+    - master
+  pull_request:
+name: ci
+jobs:
+  units:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        java: [7, 8, 11]
+    steps:
+    - uses: actions/checkout@v2
+    - uses: actions/setup-java@v1
+      with:
+        java-version: ${{matrix.java}}
+    - run: java -version
+    - run: .kokoro/build.sh
+      env:
+        JOB_TYPE: test
+    - name: coverage
+      uses: codecov/codecov-action@v1
+      with:
+        name: actions ${{matrix.java}}
+  windows:
+    runs-on: windows-latest
+    steps:
+    - uses: actions/checkout@v2
+    - uses: actions/setup-java@v1
+      with:
+        java-version: 8
+    - run: java -version
+    - run: .kokoro/build.bat
+      env:
+        JOB_TYPE: test
+  dependencies:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        java: [8, 11]
+    steps:
+    - uses: actions/checkout@v2
+    - uses: actions/setup-java@v1
+      with:
+        java-version: ${{matrix.java}}
+    - run: java -version
+    - run: .kokoro/dependencies.sh
+  linkage-monitor:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - uses: actions/setup-java@v1
+      with:
+        java-version: 8
+    - run: java -version
+    - run: .kokoro/linkage-monitor.sh
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - uses: actions/setup-java@v1
+      with:
+        java-version: 8
+    - run: java -version
+    - run: .kokoro/build.sh
+      env:
+        JOB_TYPE: lint
+  clirr:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - uses: actions/setup-java@v1
+      with:
+        java-version: 8
+    - run: java -version
+    - run: .kokoro/build.sh
+      env:
+        JOB_TYPE: clirr
\ No newline at end of file
diff --git a/.github/workflows/formatting.yaml b/.github/workflows/formatting.yaml
new file mode 100644
index 00000000..6844407b
--- /dev/null
+++ b/.github/workflows/formatting.yaml
@@ -0,0 +1,25 @@
+on:
+  pull_request_target:
+    types: [opened, synchronize]
+    branches:
+      - master
+name: format
+jobs:
+  format-code:
+    runs-on: ubuntu-latest
+    env:
+      ACCESS_TOKEN: ${{ secrets.YOSHI_CODE_BOT_TOKEN }}
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          ref: ${{github.event.pull_request.head.ref}}
+          repository: ${{github.event.pull_request.head.repo.full_name}}
+      - uses: actions/setup-java@v1
+        with:
+          java-version: 11
+      - run: "mvn com.coveo:fmt-maven-plugin:format"
+      - uses: googleapis/code-suggester@v1
+        with:
+          command: review
+          pull_number: ${{ github.event.pull_request.number }}
+          git_dir: '.'
diff --git a/.github/workflows/samples.yaml b/.github/workflows/samples.yaml
new file mode 100644
index 00000000..c46230a7
--- /dev/null
+++ b/.github/workflows/samples.yaml
@@ -0,0 +1,14 @@
+on:
+  pull_request:
+name: samples
+jobs:
+  checkstyle:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-java@v1
+        with:
+          java-version: 8
+      - name: Run checkstyle
+        run: mvn -P lint --quiet --batch-mode checkstyle:check
+        working-directory: samples/snippets
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 00000000..cc0bc34a
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,17 @@
+# Maven
+target/
+
+# Eclipse
+.classpath
+.project
+.settings
+
+# Intellij
+*.iml
+.idea/
+
+# python utilities
+*.pyc
+__pycache__
+
+.flattened-pom.xml
\ No newline at end of file
diff --git a/.kokoro/build.bat b/.kokoro/build.bat
new file mode 100644
index 00000000..05826ad9
--- /dev/null
+++ b/.kokoro/build.bat
@@ -0,0 +1,3 @@
+:: See documentation in type-shell-output.bat
+
+"C:\Program Files\Git\bin\bash.exe" %~dp0build.sh
diff --git a/.kokoro/build.sh b/.kokoro/build.sh
new file mode 100755
index 00000000..bdd298dc
--- /dev/null
+++ b/.kokoro/build.sh
@@ -0,0 +1,118 @@
+#!/bin/bash
+# Copyright 2019 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set -eo pipefail
+
+## Get the directory of the build script
+scriptDir=$(realpath $(dirname "${BASH_SOURCE[0]}"))
+## cd to the parent directory, i.e. the root of the git repo
+cd ${scriptDir}/..
+
+# include common functions
+source ${scriptDir}/common.sh
+
+# Print out Java version
+java -version
+echo ${JOB_TYPE}
+
+# attempt to install 3 times with exponential backoff (starting with 10 seconds)
+retry_with_backoff 3 10 \
+  mvn install -B -V \
+    -DskipTests=true \
+    -Dclirr.skip=true \
+    -Denforcer.skip=true \
+    -Dmaven.javadoc.skip=true \
+    -Dgcloud.download.skip=true \
+    -T 1C
+
+# if GOOGLE_APPLICATION_CREDIENTIALS is specified as a relative path prepend Kokoro root directory onto it
+if [[ ! -z "${GOOGLE_APPLICATION_CREDENTIALS}" && "${GOOGLE_APPLICATION_CREDENTIALS}" != /* ]]; then
+    export GOOGLE_APPLICATION_CREDENTIALS=$(realpath ${KOKORO_GFILE_DIR}/${GOOGLE_APPLICATION_CREDENTIALS})
+fi
+
+RETURN_CODE=0
+set +e
+
+case ${JOB_TYPE} in
+test)
+    mvn test -B -Dclirr.skip=true -Denforcer.skip=true
+    RETURN_CODE=$?
+    ;;
+lint)
+    mvn com.coveo:fmt-maven-plugin:check
+    RETURN_CODE=$?
+    ;;
+javadoc)
+    mvn javadoc:javadoc javadoc:test-javadoc
+    RETURN_CODE=$?
+    ;;
+integration)
+    mvn -B ${INTEGRATION_TEST_ARGS} \
+      -Penable-integration-tests \
+      -DtrimStackTrace=false \
+      -Dclirr.skip=true \
+      -Denforcer.skip=true \
+      -fae \
+      verify
+    RETURN_CODE=$?
+    ;;
+samples)
+    SAMPLES_DIR=samples
+    # only run ITs in snapshot/ on presubmit PRs. run ITs in all 3 samples/ subdirectories otherwise.
+    if [[ ! -z ${KOKORO_GITHUB_PULL_REQUEST_NUMBER} ]]
+    then
+      SAMPLES_DIR=samples/snapshot
+    fi
+
+    if [[ -f ${SAMPLES_DIR}/pom.xml ]]
+    then
+        pushd ${SAMPLES_DIR}
+        mvn -B \
+          -Penable-samples \
+          -DtrimStackTrace=false \
+          -Dclirr.skip=true \
+          -Denforcer.skip=true \
+          -fae \
+          verify
+        RETURN_CODE=$?
+        popd
+    else
+        echo "no sample pom.xml found - skipping sample tests"
+    fi
+    ;;
+clirr)
+    mvn -B -Denforcer.skip=true clirr:check
+    RETURN_CODE=$?
+    ;;
+*)
+    ;;
+esac
+
+if [ "${REPORT_COVERAGE}" == "true" ]
+then
+  bash ${KOKORO_GFILE_DIR}/codecov.sh
+fi
+
+# fix output location of logs
+bash .kokoro/coerce_logs.sh
+
+if [[ "${ENABLE_BUILD_COP}" == "true" ]]
+then
+    chmod +x ${KOKORO_GFILE_DIR}/linux_amd64/buildcop
+    ${KOKORO_GFILE_DIR}/linux_amd64/buildcop -repo=googleapis/java-retail
+fi
+
+echo "exiting with ${RETURN_CODE}"
+exit ${RETURN_CODE}
diff --git a/.kokoro/coerce_logs.sh b/.kokoro/coerce_logs.sh
new file mode 100755
index 00000000..5cf7ba49
--- /dev/null
+++ b/.kokoro/coerce_logs.sh
@@ -0,0 +1,38 @@
+#!/bin/bash
+# Copyright 2019 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# This script finds and moves sponge logs so that they can be found by placer
+# and are not flagged as flaky by sponge.
+
+set -eo pipefail
+
+## Get the directory of the build script
+scriptDir=$(realpath $(dirname "${BASH_SOURCE[0]}"))
+## cd to the parent directory, i.e. the root of the git repo
+cd ${scriptDir}/..
+
+job=$(basename ${KOKORO_JOB_NAME})
+
+echo "coercing sponge logs..."
+for xml in `find . -name *-sponge_log.xml`
+do
+  echo "processing ${xml}"
+  class=$(basename ${xml} | cut -d- -f2)
+  dir=$(dirname ${xml})/${job}/${class}
+  text=$(dirname ${xml})/${class}-sponge_log.txt
+  mkdir -p ${dir}
+  mv ${xml} ${dir}/sponge_log.xml
+  mv ${text} ${dir}/sponge_log.txt
+done
diff --git a/.kokoro/common.cfg b/.kokoro/common.cfg
new file mode 100644
index 00000000..b8a353e5
--- /dev/null
+++ b/.kokoro/common.cfg
@@ -0,0 +1,13 @@
+# Format: //devtools/kokoro/config/proto/build.proto
+
+# Download trampoline resources. These will be in ${KOKORO_GFILE_DIR}
+gfile_resources: "/bigstore/cloud-devrel-kokoro-resources/trampoline"
+
+# All builds use the trampoline script to run in docker.
+build_file: "java-retail/.kokoro/trampoline.sh"
+
+# Tell the trampoline which build file to use.
+env_vars: {
+  key: "TRAMPOLINE_BUILD_FILE"
+  value: "github/java-retail/.kokoro/build.sh"
+}
diff --git a/.kokoro/common.sh b/.kokoro/common.sh
new file mode 100644
index 00000000..ace89f45
--- /dev/null
+++ b/.kokoro/common.sh
@@ -0,0 +1,58 @@
+#!/bin/bash
+# Copyright 2020 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+function retry_with_backoff {
+    attempts_left=$1
+    sleep_seconds=$2
+    shift 2
+    command=$@
+
+
+    # store current flag state
+    flags=$-
+    
+    # allow a failures to continue
+    set +e
+    ${command}
+    exit_code=$?
+
+    # restore "e" flag
+    if [[ ${flags} =~ e ]]
+    then set -e
+    else set +e
+    fi
+
+    if [[ $exit_code == 0 ]]
+    then
+        return 0
+    fi
+
+    # failure
+    if [[ ${attempts_left} > 0 ]]
+    then
+        echo "failure (${exit_code}), sleeping ${sleep_seconds}..."
+        sleep ${sleep_seconds}
+        new_attempts=$((${attempts_left} - 1))
+        new_sleep=$((${sleep_seconds} * 2))
+        retry_with_backoff ${new_attempts} ${new_sleep} ${command}
+    fi
+
+    return $exit_code
+}
+
+## Helper functionss
+function now() { date +"%Y-%m-%d %H:%M:%S" | tr -d '\n'; }
+function msg() { println "$*" >&2; }
+function println() { printf '%s\n' "$(now) $*"; }
\ No newline at end of file
diff --git a/.kokoro/continuous/common.cfg b/.kokoro/continuous/common.cfg
new file mode 100644
index 00000000..407016a0
--- /dev/null
+++ b/.kokoro/continuous/common.cfg
@@ -0,0 +1,25 @@
+# Format: //devtools/kokoro/config/proto/build.proto
+
+# Build logs will be here
+action {
+  define_artifacts {
+    regex: "**/*sponge_log.xml"
+    regex: "**/*sponge_log.txt"
+  }
+}
+
+# Download trampoline resources.
+gfile_resources: "/bigstore/cloud-devrel-kokoro-resources/trampoline"
+
+# Use the trampoline script to run in docker.
+build_file: "java-retail/.kokoro/trampoline.sh"
+
+env_vars: {
+  key: "TRAMPOLINE_BUILD_FILE"
+  value: "github/java-retail/.kokoro/build.sh"
+}
+
+env_vars: {
+  key: "JOB_TYPE"
+  value: "test"
+}
diff --git a/.kokoro/continuous/java8.cfg b/.kokoro/continuous/java8.cfg
new file mode 100644
index 00000000..495cc7ba
--- /dev/null
+++ b/.kokoro/continuous/java8.cfg
@@ -0,0 +1,12 @@
+# Format: //devtools/kokoro/config/proto/build.proto
+
+# Configure the docker image for kokoro-trampoline.
+env_vars: {
+  key: "TRAMPOLINE_IMAGE"
+  value: "gcr.io/cloud-devrel-kokoro-resources/java8"
+}
+
+env_vars: {
+  key: "REPORT_COVERAGE"
+  value: "true"
+}
diff --git a/.kokoro/continuous/readme.cfg b/.kokoro/continuous/readme.cfg
new file mode 100644
index 00000000..a9747f49
--- /dev/null
+++ b/.kokoro/continuous/readme.cfg
@@ -0,0 +1,55 @@
+# Copyright 2020 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Format: //devtools/kokoro/config/proto/build.proto
+
+env_vars: {
+  key: "TRAMPOLINE_IMAGE"
+  value: "gcr.io/cloud-devrel-kokoro-resources/python-multi"
+}
+
+env_vars: {
+  key: "TRAMPOLINE_BUILD_FILE"
+  value: "github/java-retail/.kokoro/readme.sh"
+}
+
+# Build logs will be here
+action {
+  define_artifacts {
+    regex: "**/*sponge_log.xml"
+    regex: "**/*sponge_log.log"
+  }
+}
+
+# The github token is stored here.
+before_action {
+  fetch_keystore {
+    keystore_resource {
+      keystore_config_id: 73713
+      keyname: "yoshi-automation-github-key"
+      # TODO(theacodes): remove this after secrets have globally propagated
+      backend_type: FASTCONFIGPUSH
+    }
+  }
+}
+
+# Common env vars for all repositories and builds.
+env_vars: {
+    key: "GITHUB_USER"
+    value: "yoshi-automation"
+}
+env_vars: {
+    key: "GITHUB_EMAIL"
+    value: "yoshi-automation@google.com"
+}
diff --git a/.kokoro/dependencies.sh b/.kokoro/dependencies.sh
new file mode 100755
index 00000000..c91e5a56
--- /dev/null
+++ b/.kokoro/dependencies.sh
@@ -0,0 +1,89 @@
+#!/bin/bash
+# Copyright 2019 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set -eo pipefail
+
+## Get the directory of the build script
+scriptDir=$(realpath $(dirname "${BASH_SOURCE[0]}"))
+## cd to the parent directory, i.e. the root of the git repo
+cd ${scriptDir}/..
+
+# include common functions
+source ${scriptDir}/common.sh
+
+# Print out Java
+java -version
+echo $JOB_TYPE
+
+export MAVEN_OPTS="-Xmx1024m -XX:MaxPermSize=128m"
+
+# this should run maven enforcer
+retry_with_backoff 3 10 \
+  mvn install -B -V \
+    -DskipTests=true \
+    -Dclirr.skip=true
+
+mvn -B dependency:analyze -DfailOnWarning=true
+
+echo "****************** DEPENDENCY LIST COMPLETENESS CHECK *******************"
+## Run dependency list completeness check
+function completenessCheck() {
+  # Output dep list with compile scope generated using the original pom
+  # Running mvn dependency:list on Java versions that support modules will also include the module of the dependency.
+  # This is stripped from the output as it is not present in the flattened pom.
+  # Only dependencies with 'compile' or 'runtime' scope are included from original dependency list.
+  msg "Generating dependency list using original pom..."
+  mvn dependency:list -f pom.xml -DincludeScope=runtime -Dsort=true | grep '\[INFO]    .*:.*:.*:.*:.*' | sed -e s/\\s--\\smodule.*// >.org-list.txt
+
+  # Output dep list generated using the flattened pom (only 'compile' and 'runtime' scopes)
+  msg "Generating dependency list using flattened pom..."
+  mvn dependency:list -f .flattened-pom.xml -DincludeScope=runtime -Dsort=true | grep '\[INFO]    .*:.*:.*:.*:.*' >.new-list.txt
+
+  # Compare two dependency lists
+  msg "Comparing dependency lists..."
+  diff .org-list.txt .new-list.txt >.diff.txt
+  if [[ $? == 0 ]]
+    then
+      msg "Success. No diff!"
+  else
+    msg "Diff found. See below: "
+    msg "You can also check .diff.txt file located in $1."
+    cat .diff.txt
+    return 1
+  fi
+}
+
+# Allow failures to continue running the script
+set +e
+
+error_count=0
+for path in $(find -name ".flattened-pom.xml")
+do
+  # Check flattened pom in each dir that contains it for completeness
+  dir=$(dirname "$path")
+  pushd "$dir"
+  completenessCheck "$dir"
+  error_count=$(($error_count + $?))
+  popd
+done
+
+if [[ $error_count == 0 ]]
+then
+  msg "All checks passed."
+  exit 0
+else
+  msg "Errors found. See log statements above."
+  exit 1
+fi
\ No newline at end of file
diff --git a/.kokoro/linkage-monitor.sh b/.kokoro/linkage-monitor.sh
new file mode 100755
index 00000000..759ab4e2
--- /dev/null
+++ b/.kokoro/linkage-monitor.sh
@@ -0,0 +1,46 @@
+#!/bin/bash
+# Copyright 2019 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set -eo pipefail
+# Display commands being run.
+set -x
+
+## Get the directory of the build script
+scriptDir=$(realpath $(dirname "${BASH_SOURCE[0]}"))
+## cd to the parent directory, i.e. the root of the git repo
+cd ${scriptDir}/..
+
+# include common functions
+source ${scriptDir}/common.sh
+
+# Print out Java version
+java -version
+echo ${JOB_TYPE}
+
+# attempt to install 3 times with exponential backoff (starting with 10 seconds)
+retry_with_backoff 3 10 \
+  mvn install -B -V \
+    -DskipTests=true \
+    -Dclirr.skip=true \
+    -Denforcer.skip=true \
+    -Dmaven.javadoc.skip=true \
+    -Dgcloud.download.skip=true
+
+# Kokoro job cloud-opensource-java/ubuntu/linkage-monitor-gcs creates this JAR
+JAR=linkage-monitor-latest-all-deps.jar
+curl -v -O "https://storage.googleapis.com/cloud-opensource-java-linkage-monitor/${JAR}"
+
+# Fails if there's new linkage errors compared with baseline
+java -jar ${JAR} com.google.cloud:libraries-bom
diff --git a/.kokoro/nightly/common.cfg b/.kokoro/nightly/common.cfg
new file mode 100644
index 00000000..407016a0
--- /dev/null
+++ b/.kokoro/nightly/common.cfg
@@ -0,0 +1,25 @@
+# Format: //devtools/kokoro/config/proto/build.proto
+
+# Build logs will be here
+action {
+  define_artifacts {
+    regex: "**/*sponge_log.xml"
+    regex: "**/*sponge_log.txt"
+  }
+}
+
+# Download trampoline resources.
+gfile_resources: "/bigstore/cloud-devrel-kokoro-resources/trampoline"
+
+# Use the trampoline script to run in docker.
+build_file: "java-retail/.kokoro/trampoline.sh"
+
+env_vars: {
+  key: "TRAMPOLINE_BUILD_FILE"
+  value: "github/java-retail/.kokoro/build.sh"
+}
+
+env_vars: {
+  key: "JOB_TYPE"
+  value: "test"
+}
diff --git a/.kokoro/nightly/integration.cfg b/.kokoro/nightly/integration.cfg
new file mode 100644
index 00000000..0048c8ec
--- /dev/null
+++ b/.kokoro/nightly/integration.cfg
@@ -0,0 +1,37 @@
+# Format: //devtools/kokoro/config/proto/build.proto
+
+# Configure the docker image for kokoro-trampoline.
+env_vars: {
+  key: "TRAMPOLINE_IMAGE"
+  value: "gcr.io/cloud-devrel-kokoro-resources/java8"
+}
+
+env_vars: {
+  key: "JOB_TYPE"
+  value: "integration"
+}
+# TODO: remove this after we've migrated all tests and scripts
+env_vars: {
+  key: "GCLOUD_PROJECT"
+  value: "gcloud-devel"
+}
+
+env_vars: {
+  key: "GOOGLE_CLOUD_PROJECT"
+  value: "gcloud-devel"
+}
+
+env_vars: {
+  key: "ENABLE_BUILD_COP"
+  value: "true"
+}
+
+env_vars: {
+  key: "GOOGLE_APPLICATION_CREDENTIALS"
+  value: "secret_manager/java-it-service-account"
+}
+
+env_vars: {
+  key: "SECRET_MANAGER_KEYS"
+  value: "java-it-service-account"
+}
diff --git a/.kokoro/nightly/java11.cfg b/.kokoro/nightly/java11.cfg
new file mode 100644
index 00000000..709f2b4c
--- /dev/null
+++ b/.kokoro/nightly/java11.cfg
@@ -0,0 +1,7 @@
+# Format: //devtools/kokoro/config/proto/build.proto
+
+# Configure the docker image for kokoro-trampoline.
+env_vars: {
+  key: "TRAMPOLINE_IMAGE"
+  value: "gcr.io/cloud-devrel-kokoro-resources/java11"
+}
diff --git a/.kokoro/nightly/java7.cfg b/.kokoro/nightly/java7.cfg
new file mode 100644
index 00000000..cb24f44e
--- /dev/null
+++ b/.kokoro/nightly/java7.cfg
@@ -0,0 +1,7 @@
+# Format: //devtools/kokoro/config/proto/build.proto
+
+# Configure the docker image for kokoro-trampoline.
+env_vars: {
+  key: "TRAMPOLINE_IMAGE"
+  value: "gcr.io/cloud-devrel-kokoro-resources/java7"
+}
diff --git a/.kokoro/nightly/java8-osx.cfg b/.kokoro/nightly/java8-osx.cfg
new file mode 100644
index 00000000..f5895b3c
--- /dev/null
+++ b/.kokoro/nightly/java8-osx.cfg
@@ -0,0 +1,3 @@
+# Format: //devtools/kokoro/config/proto/build.proto
+
+build_file: "java-retail/.kokoro/build.sh"
diff --git a/.kokoro/nightly/java8-win.cfg b/.kokoro/nightly/java8-win.cfg
new file mode 100644
index 00000000..ce72000d
--- /dev/null
+++ b/.kokoro/nightly/java8-win.cfg
@@ -0,0 +1,3 @@
+# Format: //devtools/kokoro/config/proto/build.proto
+
+build_file: "java-retail/.kokoro/build.bat"
diff --git a/.kokoro/nightly/java8.cfg b/.kokoro/nightly/java8.cfg
new file mode 100644
index 00000000..495cc7ba
--- /dev/null
+++ b/.kokoro/nightly/java8.cfg
@@ -0,0 +1,12 @@
+# Format: //devtools/kokoro/config/proto/build.proto
+
+# Configure the docker image for kokoro-trampoline.
+env_vars: {
+  key: "TRAMPOLINE_IMAGE"
+  value: "gcr.io/cloud-devrel-kokoro-resources/java8"
+}
+
+env_vars: {
+  key: "REPORT_COVERAGE"
+  value: "true"
+}
diff --git a/.kokoro/nightly/samples.cfg b/.kokoro/nightly/samples.cfg
new file mode 100644
index 00000000..f2542931
--- /dev/null
+++ b/.kokoro/nightly/samples.cfg
@@ -0,0 +1,38 @@
+# Format: //devtools/kokoro/config/proto/build.proto
+
+# Configure the docker image for kokoro-trampoline.
+env_vars: {
+  key: "TRAMPOLINE_IMAGE"
+  value: "gcr.io/cloud-devrel-kokoro-resources/java8"
+}
+
+env_vars: {
+  key: "JOB_TYPE"
+  value: "samples"
+}
+
+# TODO: remove this after we've migrated all tests and scripts
+env_vars: {
+  key: "GCLOUD_PROJECT"
+  value: "java-docs-samples-testing"
+}
+
+env_vars: {
+  key: "GOOGLE_CLOUD_PROJECT"
+  value: "java-docs-samples-testing"
+}
+
+env_vars: {
+  key: "GOOGLE_APPLICATION_CREDENTIALS"
+  value: "secret_manager/java-docs-samples-service-account"
+}
+
+env_vars: {
+  key: "SECRET_MANAGER_KEYS"
+  value: "java-docs-samples-service-account"
+}
+
+env_vars: {
+  key: "ENABLE_BUILD_COP"
+  value: "true"
+}
diff --git a/.kokoro/populate-secrets.sh b/.kokoro/populate-secrets.sh
new file mode 100755
index 00000000..f5251425
--- /dev/null
+++ b/.kokoro/populate-secrets.sh
@@ -0,0 +1,43 @@
+#!/bin/bash
+# Copyright 2020 Google LLC.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set -eo pipefail
+
+function now { date +"%Y-%m-%d %H:%M:%S" | tr -d '\n' ;}
+function msg { println "$*" >&2 ;}
+function println { printf '%s\n' "$(now) $*" ;}
+
+
+# Populates requested secrets set in SECRET_MANAGER_KEYS from service account:
+# kokoro-trampoline@cloud-devrel-kokoro-resources.iam.gserviceaccount.com
+SECRET_LOCATION="${KOKORO_GFILE_DIR}/secret_manager"
+msg "Creating folder on disk for secrets: ${SECRET_LOCATION}"
+mkdir -p ${SECRET_LOCATION}
+for key in $(echo ${SECRET_MANAGER_KEYS} | sed "s/,/ /g")
+do
+  msg "Retrieving secret ${key}"
+  docker run --entrypoint=gcloud \
+    --volume=${KOKORO_GFILE_DIR}:${KOKORO_GFILE_DIR} \
+    gcr.io/google.com/cloudsdktool/cloud-sdk \
+    secrets versions access latest \
+    --project cloud-devrel-kokoro-resources \
+    --secret ${key} > \
+    "${SECRET_LOCATION}/${key}"
+  if [[ $? == 0 ]]; then
+    msg "Secret written to ${SECRET_LOCATION}/${key}"
+  else
+    msg "Error retrieving secret ${key}"
+  fi
+done
diff --git a/.kokoro/presubmit/clirr.cfg b/.kokoro/presubmit/clirr.cfg
new file mode 100644
index 00000000..ec572442
--- /dev/null
+++ b/.kokoro/presubmit/clirr.cfg
@@ -0,0 +1,13 @@
+# Format: //devtools/kokoro/config/proto/build.proto
+
+# Configure the docker image for kokoro-trampoline.
+
+env_vars: {
+  key: "TRAMPOLINE_IMAGE"
+  value: "gcr.io/cloud-devrel-kokoro-resources/java8"
+}
+
+env_vars: {
+  key: "JOB_TYPE"
+  value: "clirr"
+}
\ No newline at end of file
diff --git a/.kokoro/presubmit/common.cfg b/.kokoro/presubmit/common.cfg
new file mode 100644
index 00000000..1cd188d0
--- /dev/null
+++ b/.kokoro/presubmit/common.cfg
@@ -0,0 +1,34 @@
+# Format: //devtools/kokoro/config/proto/build.proto
+
+# Build logs will be here
+action {
+  define_artifacts {
+    regex: "**/*sponge_log.xml"
+    regex: "**/*sponge_log.txt"
+  }
+}
+
+# Download trampoline resources.
+gfile_resources: "/bigstore/cloud-devrel-kokoro-resources/trampoline"
+
+# Use the trampoline script to run in docker.
+build_file: "java-retail/.kokoro/trampoline.sh"
+
+env_vars: {
+  key: "TRAMPOLINE_BUILD_FILE"
+  value: "github/java-retail/.kokoro/build.sh"
+}
+
+env_vars: {
+  key: "JOB_TYPE"
+  value: "test"
+}
+
+before_action {
+  fetch_keystore {
+    keystore_resource {
+      keystore_config_id: 73713
+      keyname: "dpebot_codecov_token"
+    }
+  }
+}
diff --git a/.kokoro/presubmit/dependencies.cfg b/.kokoro/presubmit/dependencies.cfg
new file mode 100644
index 00000000..d9b61ace
--- /dev/null
+++ b/.kokoro/presubmit/dependencies.cfg
@@ -0,0 +1,12 @@
+# Format: //devtools/kokoro/config/proto/build.proto
+
+# Configure the docker image for kokoro-trampoline.
+env_vars: {
+  key: "TRAMPOLINE_IMAGE"
+  value: "gcr.io/cloud-devrel-kokoro-resources/java8"
+}
+
+env_vars: {
+  key: "TRAMPOLINE_BUILD_FILE"
+  value: "github/java-retail/.kokoro/dependencies.sh"
+}
diff --git a/.kokoro/presubmit/integration.cfg b/.kokoro/presubmit/integration.cfg
new file mode 100644
index 00000000..dded67a9
--- /dev/null
+++ b/.kokoro/presubmit/integration.cfg
@@ -0,0 +1,33 @@
+# Format: //devtools/kokoro/config/proto/build.proto
+
+# Configure the docker image for kokoro-trampoline.
+env_vars: {
+  key: "TRAMPOLINE_IMAGE"
+  value: "gcr.io/cloud-devrel-kokoro-resources/java8"
+}
+
+env_vars: {
+  key: "JOB_TYPE"
+  value: "integration"
+}
+
+# TODO: remove this after we've migrated all tests and scripts
+env_vars: {
+  key: "GCLOUD_PROJECT"
+  value: "gcloud-devel"
+}
+
+env_vars: {
+  key: "GOOGLE_CLOUD_PROJECT"
+  value: "gcloud-devel"
+}
+
+env_vars: {
+  key: "GOOGLE_APPLICATION_CREDENTIALS"
+  value: "secret_manager/java-it-service-account"
+}
+
+env_vars: {
+  key: "SECRET_MANAGER_KEYS"
+  value: "java-it-service-account"
+}
diff --git a/.kokoro/presubmit/java11.cfg b/.kokoro/presubmit/java11.cfg
new file mode 100644
index 00000000..709f2b4c
--- /dev/null
+++ b/.kokoro/presubmit/java11.cfg
@@ -0,0 +1,7 @@
+# Format: //devtools/kokoro/config/proto/build.proto
+
+# Configure the docker image for kokoro-trampoline.
+env_vars: {
+  key: "TRAMPOLINE_IMAGE"
+  value: "gcr.io/cloud-devrel-kokoro-resources/java11"
+}
diff --git a/.kokoro/presubmit/java7.cfg b/.kokoro/presubmit/java7.cfg
new file mode 100644
index 00000000..cb24f44e
--- /dev/null
+++ b/.kokoro/presubmit/java7.cfg
@@ -0,0 +1,7 @@
+# Format: //devtools/kokoro/config/proto/build.proto
+
+# Configure the docker image for kokoro-trampoline.
+env_vars: {
+  key: "TRAMPOLINE_IMAGE"
+  value: "gcr.io/cloud-devrel-kokoro-resources/java7"
+}
diff --git a/.kokoro/presubmit/java8-osx.cfg b/.kokoro/presubmit/java8-osx.cfg
new file mode 100644
index 00000000..f5895b3c
--- /dev/null
+++ b/.kokoro/presubmit/java8-osx.cfg
@@ -0,0 +1,3 @@
+# Format: //devtools/kokoro/config/proto/build.proto
+
+build_file: "java-retail/.kokoro/build.sh"
diff --git a/.kokoro/presubmit/java8-win.cfg b/.kokoro/presubmit/java8-win.cfg
new file mode 100644
index 00000000..ce72000d
--- /dev/null
+++ b/.kokoro/presubmit/java8-win.cfg
@@ -0,0 +1,3 @@
+# Format: //devtools/kokoro/config/proto/build.proto
+
+build_file: "java-retail/.kokoro/build.bat"
diff --git a/.kokoro/presubmit/java8.cfg b/.kokoro/presubmit/java8.cfg
new file mode 100644
index 00000000..495cc7ba
--- /dev/null
+++ b/.kokoro/presubmit/java8.cfg
@@ -0,0 +1,12 @@
+# Format: //devtools/kokoro/config/proto/build.proto
+
+# Configure the docker image for kokoro-trampoline.
+env_vars: {
+  key: "TRAMPOLINE_IMAGE"
+  value: "gcr.io/cloud-devrel-kokoro-resources/java8"
+}
+
+env_vars: {
+  key: "REPORT_COVERAGE"
+  value: "true"
+}
diff --git a/.kokoro/presubmit/linkage-monitor.cfg b/.kokoro/presubmit/linkage-monitor.cfg
new file mode 100644
index 00000000..089e5b56
--- /dev/null
+++ b/.kokoro/presubmit/linkage-monitor.cfg
@@ -0,0 +1,12 @@
+# Format: //devtools/kokoro/config/proto/build.proto
+
+# Configure the docker image for kokoro-trampoline.
+env_vars: {
+  key: "TRAMPOLINE_IMAGE"
+  value: "gcr.io/cloud-devrel-kokoro-resources/java8"
+}
+
+env_vars: {
+  key: "TRAMPOLINE_BUILD_FILE"
+  value: "github/java-retail/.kokoro/linkage-monitor.sh"
+}
\ No newline at end of file
diff --git a/.kokoro/presubmit/lint.cfg b/.kokoro/presubmit/lint.cfg
new file mode 100644
index 00000000..6d323c8a
--- /dev/null
+++ b/.kokoro/presubmit/lint.cfg
@@ -0,0 +1,13 @@
+# Format: //devtools/kokoro/config/proto/build.proto
+
+# Configure the docker image for kokoro-trampoline.
+
+env_vars: {
+  key: "TRAMPOLINE_IMAGE"
+  value: "gcr.io/cloud-devrel-kokoro-resources/java8"
+}
+
+env_vars: {
+  key: "JOB_TYPE"
+  value: "lint"
+}
\ No newline at end of file
diff --git a/.kokoro/presubmit/samples.cfg b/.kokoro/presubmit/samples.cfg
new file mode 100644
index 00000000..01e09600
--- /dev/null
+++ b/.kokoro/presubmit/samples.cfg
@@ -0,0 +1,33 @@
+# Format: //devtools/kokoro/config/proto/build.proto
+
+# Configure the docker image for kokoro-trampoline.
+env_vars: {
+  key: "TRAMPOLINE_IMAGE"
+  value: "gcr.io/cloud-devrel-kokoro-resources/java8"
+}
+
+env_vars: {
+  key: "JOB_TYPE"
+  value: "samples"
+}
+
+# TODO: remove this after we've migrated all tests and scripts
+env_vars: {
+  key: "GCLOUD_PROJECT"
+  value: "java-docs-samples-testing"
+}
+
+env_vars: {
+  key: "GOOGLE_CLOUD_PROJECT"
+  value: "java-docs-samples-testing"
+}
+
+env_vars: {
+  key: "GOOGLE_APPLICATION_CREDENTIALS"
+  value: "secret_manager/java-docs-samples-service-account"
+}
+
+env_vars: {
+  key: "SECRET_MANAGER_KEYS"
+  value: "java-docs-samples-service-account"
+}
\ No newline at end of file
diff --git a/.kokoro/readme.sh b/.kokoro/readme.sh
new file mode 100755
index 00000000..1180d8e1
--- /dev/null
+++ b/.kokoro/readme.sh
@@ -0,0 +1,45 @@
+#!/bin/bash
+# Copyright 2020 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set -eo pipefail
+
+cd ${KOKORO_ARTIFACTS_DIR}/github/java-retail
+
+# Disable buffering, so that the logs stream through.
+export PYTHONUNBUFFERED=1
+
+# Kokoro exposes this as a file, but the scripts expect just a plain variable.
+export GITHUB_TOKEN=$(cat ${KOKORO_KEYSTORE_DIR}/73713_yoshi-automation-github-key)
+
+# Setup git credentials
+echo "https://${GITHUB_TOKEN}:@github.com" >> ~/.git-credentials
+git config --global credential.helper 'store --file ~/.git-credentials'
+
+python3.6 -m pip install git+https://github.com/googleapis/synthtool.git#egg=gcp-synthtool
+
+set +e
+python3.6 -m autosynth.synth \
+    --repository=googleapis/java-retail \
+    --synth-file-name=.github/readme/synth.py \
+    --metadata-path=.github/readme/synth.metadata \
+    --pr-title="chore: regenerate README" \
+    --branch-suffix="readme"
+
+# autosynth returns 28 to signal there are no changes
+RETURN_CODE=$?
+if [[ ${RETURN_CODE} -ne 0 && ${RETURN_CODE} -ne 28 ]]
+then
+    exit ${RETURN_CODE}
+fi
diff --git a/.kokoro/release/bump_snapshot.cfg b/.kokoro/release/bump_snapshot.cfg
new file mode 100644
index 00000000..89c6e490
--- /dev/null
+++ b/.kokoro/release/bump_snapshot.cfg
@@ -0,0 +1,53 @@
+# Format: //devtools/kokoro/config/proto/build.proto
+
+# Build logs will be here
+action {
+  define_artifacts {
+    regex: "**/*sponge_log.xml"
+  }
+}
+
+# Download trampoline resources.
+gfile_resources: "/bigstore/cloud-devrel-kokoro-resources/trampoline"
+
+# Use the trampoline script to run in docker.
+build_file: "java-retail/.kokoro/trampoline.sh"
+
+# Configure the docker image for kokoro-trampoline.
+env_vars: {
+  key: "TRAMPOLINE_IMAGE"
+  value: "gcr.io/cloud-devrel-kokoro-resources/node:10-user"
+}
+
+env_vars: {
+  key: "TRAMPOLINE_BUILD_FILE"
+  value: "github/java-retail/.kokoro/release/bump_snapshot.sh"
+}
+
+# tokens used by release-please to keep an up-to-date release PR.
+before_action {
+  fetch_keystore {
+    keystore_resource {
+      keystore_config_id: 73713
+      keyname: "github-magic-proxy-key-release-please"
+    }
+  }
+}
+
+before_action {
+  fetch_keystore {
+    keystore_resource {
+      keystore_config_id: 73713
+      keyname: "github-magic-proxy-token-release-please"
+    }
+  }
+}
+
+before_action {
+  fetch_keystore {
+    keystore_resource {
+      keystore_config_id: 73713
+      keyname: "github-magic-proxy-url-release-please"
+    }
+  }
+}
diff --git a/.kokoro/release/common.cfg b/.kokoro/release/common.cfg
new file mode 100644
index 00000000..59b0e3ac
--- /dev/null
+++ b/.kokoro/release/common.cfg
@@ -0,0 +1,49 @@
+# Format: //devtools/kokoro/config/proto/build.proto
+
+# Download trampoline resources.
+gfile_resources: "/bigstore/cloud-devrel-kokoro-resources/trampoline"
+
+# Use the trampoline script to run in docker.
+build_file: "java-retail/.kokoro/trampoline.sh"
+
+# Configure the docker image for kokoro-trampoline.
+env_vars: {
+  key: "TRAMPOLINE_IMAGE"
+  value: "gcr.io/cloud-devrel-kokoro-resources/java8"
+}
+
+before_action {
+  fetch_keystore {
+    keystore_resource {
+      keystore_config_id: 70247
+      keyname: "maven-gpg-keyring"
+    }
+  }
+}
+
+before_action {
+  fetch_keystore {
+    keystore_resource {
+      keystore_config_id: 70247
+      keyname: "maven-gpg-passphrase"
+    }
+  }
+}
+
+before_action {
+  fetch_keystore {
+    keystore_resource {
+      keystore_config_id: 70247
+      keyname: "maven-gpg-pubkeyring"
+    }
+  }
+}
+
+before_action {
+  fetch_keystore {
+    keystore_resource {
+      keystore_config_id: 70247
+      keyname: "sonatype-credentials"
+    }
+  }
+}
diff --git a/.kokoro/release/common.sh b/.kokoro/release/common.sh
new file mode 100755
index 00000000..6e3f6599
--- /dev/null
+++ b/.kokoro/release/common.sh
@@ -0,0 +1,50 @@
+#!/bin/bash
+# Copyright 2018 Google Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set -eo pipefail
+
+# Get secrets from keystore and set and environment variables
+setup_environment_secrets() {
+  export GPG_PASSPHRASE=$(cat ${KOKORO_KEYSTORE_DIR}/70247_maven-gpg-passphrase)
+  export GPG_TTY=$(tty)
+  export GPG_HOMEDIR=/gpg
+  mkdir $GPG_HOMEDIR
+  mv ${KOKORO_KEYSTORE_DIR}/70247_maven-gpg-pubkeyring $GPG_HOMEDIR/pubring.gpg
+  mv ${KOKORO_KEYSTORE_DIR}/70247_maven-gpg-keyring $GPG_HOMEDIR/secring.gpg
+  export SONATYPE_USERNAME=$(cat ${KOKORO_KEYSTORE_DIR}/70247_sonatype-credentials | cut -f1 -d'|')
+  export SONATYPE_PASSWORD=$(cat ${KOKORO_KEYSTORE_DIR}/70247_sonatype-credentials | cut -f2 -d'|')
+}
+
+create_settings_xml_file() {
+  echo "<settings>
+  <servers>
+    <server>
+      <id>ossrh</id>
+      <username>${SONATYPE_USERNAME}</username>
+      <password>${SONATYPE_PASSWORD}</password>
+    </server>
+    <server>
+      <id>sonatype-nexus-staging</id>
+      <username>${SONATYPE_USERNAME}</username>
+      <password>${SONATYPE_PASSWORD}</password>
+    </server>
+    <server>
+      <id>sonatype-nexus-snapshots</id>
+      <username>${SONATYPE_USERNAME}</username>
+      <password>${SONATYPE_PASSWORD}</password>
+    </server>
+  </servers>
+</settings>" > $1
+}
\ No newline at end of file
diff --git a/.kokoro/release/drop.cfg b/.kokoro/release/drop.cfg
new file mode 100644
index 00000000..deec4bd4
--- /dev/null
+++ b/.kokoro/release/drop.cfg
@@ -0,0 +1,6 @@
+# Format: //devtools/kokoro/config/proto/build.proto
+
+env_vars: {
+  key: "TRAMPOLINE_BUILD_FILE"
+  value: "github/java-retail/.kokoro/release/drop.sh"
+}
diff --git a/.kokoro/release/drop.sh b/.kokoro/release/drop.sh
new file mode 100755
index 00000000..5c4551ef
--- /dev/null
+++ b/.kokoro/release/drop.sh
@@ -0,0 +1,32 @@
+#!/bin/bash
+# Copyright 2018 Google Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set -eo pipefail
+
+# STAGING_REPOSITORY_ID must be set
+if [ -z "${STAGING_REPOSITORY_ID}" ]; then
+  echo "Missing STAGING_REPOSITORY_ID environment variable"
+  exit 1
+fi
+
+source $(dirname "$0")/common.sh
+pushd $(dirname "$0")/../../
+
+setup_environment_secrets
+create_settings_xml_file "settings.xml"
+
+mvn nexus-staging:drop -B \
+  --settings=settings.xml \
+  -DstagingRepositoryId=${STAGING_REPOSITORY_ID}
diff --git a/.kokoro/release/promote.cfg b/.kokoro/release/promote.cfg
new file mode 100644
index 00000000..8d1f29d1
--- /dev/null
+++ b/.kokoro/release/promote.cfg
@@ -0,0 +1,6 @@
+# Format: //devtools/kokoro/config/proto/build.proto
+
+env_vars: {
+  key: "TRAMPOLINE_BUILD_FILE"
+  value: "github/java-retail/.kokoro/release/promote.sh"
+}
diff --git a/.kokoro/release/promote.sh b/.kokoro/release/promote.sh
new file mode 100755
index 00000000..1fa95fa5
--- /dev/null
+++ b/.kokoro/release/promote.sh
@@ -0,0 +1,34 @@
+#!/bin/bash
+# Copyright 2018 Google Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set -eo pipefail
+
+# STAGING_REPOSITORY_ID must be set
+if [ -z "${STAGING_REPOSITORY_ID}" ]; then
+  echo "Missing STAGING_REPOSITORY_ID environment variable"
+  exit 1
+fi
+
+source $(dirname "$0")/common.sh
+
+pushd $(dirname "$0")/../../
+
+setup_environment_secrets
+create_settings_xml_file "settings.xml"
+
+mvn nexus-staging:release -B \
+  -DperformRelease=true \
+  --settings=settings.xml \
+  -DstagingRepositoryId=${STAGING_REPOSITORY_ID}
diff --git a/.kokoro/release/publish_javadoc.cfg b/.kokoro/release/publish_javadoc.cfg
new file mode 100644
index 00000000..02b8306a
--- /dev/null
+++ b/.kokoro/release/publish_javadoc.cfg
@@ -0,0 +1,29 @@
+# Format: //devtools/kokoro/config/proto/build.proto
+
+gfile_resources: "/bigstore/cloud-devrel-kokoro-resources/doc-templates/"
+
+env_vars: {
+  key: "STAGING_BUCKET"
+  value: "docs-staging"
+}
+
+env_vars: {
+  key: "STAGING_BUCKET_V2"
+  value: "docs-staging-v2"
+  # Production will be at: docs-staging-v2
+}
+
+env_vars: {
+  key: "TRAMPOLINE_BUILD_FILE"
+  value: "github/java-retail/.kokoro/release/publish_javadoc.sh"
+}
+
+
+before_action {
+  fetch_keystore {
+    keystore_resource {
+      keystore_config_id: 73713
+      keyname: "docuploader_service_account"
+    }
+  }
+}
diff --git a/.kokoro/release/publish_javadoc.sh b/.kokoro/release/publish_javadoc.sh
new file mode 100755
index 00000000..1a2416c5
--- /dev/null
+++ b/.kokoro/release/publish_javadoc.sh
@@ -0,0 +1,77 @@
+#!/bin/bash
+# Copyright 2019 Google Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set -eo pipefail
+
+if [[ -z "${CREDENTIALS}" ]]; then
+  CREDENTIALS=${KOKORO_KEYSTORE_DIR}/73713_docuploader_service_account
+fi
+
+if [[ -z "${STAGING_BUCKET}" ]]; then
+  echo "Need to set STAGING_BUCKET environment variable"
+  exit 1
+fi
+
+if [[ -z "${STAGING_BUCKET_V2}" ]]; then
+  echo "Need to set STAGING_BUCKET_V2 environment variable"
+  exit 1
+fi
+
+# work from the git root directory
+pushd $(dirname "$0")/../../
+
+# install docuploader package
+python3 -m pip install gcp-docuploader
+
+# compile all packages
+mvn clean install -B -q -DskipTests=true
+
+export NAME=google-cloud-retail
+export VERSION=$(grep ${NAME}: versions.txt | cut -d: -f3)
+
+# build the docs
+mvn site -B -q
+
+pushd target/site/apidocs
+
+# create metadata
+python3 -m docuploader create-metadata \
+  --name ${NAME} \
+  --version ${VERSION} \
+  --language java
+
+# upload docs
+python3 -m docuploader upload . \
+  --credentials ${CREDENTIALS} \
+  --staging-bucket ${STAGING_BUCKET}
+
+popd
+
+# V2 due to problems w/ the released javadoc plugin doclava, Java 8 is required.  Beware of accidental updates.
+
+mvn clean site -B -q -Ddevsite.template="${KOKORO_GFILE_DIR}/java/"
+
+pushd target/devsite/reference
+
+# create metadata
+python3 -m docuploader create-metadata \
+  --name ${NAME} \
+  --version ${VERSION} \
+  --language java
+
+# upload docs
+python3 -m docuploader upload . \
+  --credentials ${CREDENTIALS} \
+  --staging-bucket ${STAGING_BUCKET_V2}
diff --git a/.kokoro/release/snapshot.cfg b/.kokoro/release/snapshot.cfg
new file mode 100644
index 00000000..4d7f084d
--- /dev/null
+++ b/.kokoro/release/snapshot.cfg
@@ -0,0 +1,6 @@
+# Format: //devtools/kokoro/config/proto/build.proto
+
+env_vars: {
+  key: "TRAMPOLINE_BUILD_FILE"
+  value: "github/java-retail/.kokoro/release/snapshot.sh"
+}
\ No newline at end of file
diff --git a/.kokoro/release/snapshot.sh b/.kokoro/release/snapshot.sh
new file mode 100755
index 00000000..098168a7
--- /dev/null
+++ b/.kokoro/release/snapshot.sh
@@ -0,0 +1,33 @@
+#!/bin/bash
+# Copyright 2019 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set -eo pipefail
+
+source $(dirname "$0")/common.sh
+MAVEN_SETTINGS_FILE=$(realpath $(dirname "$0")/../../)/settings.xml
+pushd $(dirname "$0")/../../
+
+# ensure we're trying to push a snapshot (no-result returns non-zero exit code)
+grep SNAPSHOT versions.txt
+
+setup_environment_secrets
+create_settings_xml_file "settings.xml"
+
+mvn clean install deploy -B \
+  --settings ${MAVEN_SETTINGS_FILE} \
+  -DperformRelease=true \
+  -Dgpg.executable=gpg \
+  -Dgpg.passphrase=${GPG_PASSPHRASE} \
+  -Dgpg.homedir=${GPG_HOMEDIR}
diff --git a/.kokoro/release/stage.cfg b/.kokoro/release/stage.cfg
new file mode 100644
index 00000000..62260962
--- /dev/null
+++ b/.kokoro/release/stage.cfg
@@ -0,0 +1,19 @@
+# Format: //devtools/kokoro/config/proto/build.proto
+
+env_vars: {
+  key: "TRAMPOLINE_BUILD_FILE"
+  value: "github/java-retail/.kokoro/release/stage.sh"
+}
+
+# Need to save the properties file
+action {
+  define_artifacts {
+    regex: "github/java-retail/target/nexus-staging/staging/*.properties"
+    strip_prefix: "github/java-retail"
+  }
+}
+
+env_vars: {
+  key: "SECRET_MANAGER_KEYS"
+  value: "releasetool-publish-reporter-app,releasetool-publish-reporter-googleapis-installation,releasetool-publish-reporter-pem"
+}
diff --git a/.kokoro/release/stage.sh b/.kokoro/release/stage.sh
new file mode 100755
index 00000000..16126d2e
--- /dev/null
+++ b/.kokoro/release/stage.sh
@@ -0,0 +1,45 @@
+#!/bin/bash
+# Copyright 2018 Google Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set -eo pipefail
+
+# Start the releasetool reporter
+python3 -m pip install gcp-releasetool
+python3 -m releasetool publish-reporter-script > /tmp/publisher-script; source /tmp/publisher-script
+
+source $(dirname "$0")/common.sh
+source $(dirname "$0")/../common.sh
+MAVEN_SETTINGS_FILE=$(realpath $(dirname "$0")/../../)/settings.xml
+pushd $(dirname "$0")/../../
+
+setup_environment_secrets
+create_settings_xml_file "settings.xml"
+
+# attempt to stage 3 times with exponential backoff (starting with 10 seconds)
+retry_with_backoff 3 10 \
+  mvn clean install deploy -B \
+    --settings ${MAVEN_SETTINGS_FILE} \
+    -DskipTests=true \
+    -DperformRelease=true \
+    -Dgpg.executable=gpg \
+    -Dgpg.passphrase=${GPG_PASSPHRASE} \
+    -Dgpg.homedir=${GPG_HOMEDIR}
+
+if [[ -n "${AUTORELEASE_PR}" ]]
+then
+  mvn nexus-staging:release -B \
+    -DperformRelease=true \
+    --settings=settings.xml
+fi
\ No newline at end of file
diff --git a/.kokoro/trampoline.sh b/.kokoro/trampoline.sh
new file mode 100644
index 00000000..9da0f839
--- /dev/null
+++ b/.kokoro/trampoline.sh
@@ -0,0 +1,26 @@
+#!/bin/bash
+# Copyright 2018 Google Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+set -eo pipefail
+# Always run the cleanup script, regardless of the success of bouncing into
+# the container.
+function cleanup() {
+    chmod +x ${KOKORO_GFILE_DIR}/trampoline_cleanup.sh
+    ${KOKORO_GFILE_DIR}/trampoline_cleanup.sh
+    echo "cleanup";
+}
+trap cleanup EXIT
+
+$(dirname $0)/populate-secrets.sh # Secret Manager secrets.
+python3 "${KOKORO_GFILE_DIR}/trampoline_v1.py"
diff --git a/.repo-metadata.json b/.repo-metadata.json
new file mode 100644
index 00000000..e52773a7
--- /dev/null
+++ b/.repo-metadata.json
@@ -0,0 +1,15 @@
+{
+  "name": "retail",
+  "name_pretty": "Cloud Retail",
+  "product_documentation": "https://cloud.google.com/solutions/retail",
+  "api_description": "Retail solutions API.",
+  "client_documentation": "https://googleapis.dev/java/google-cloud-retail/latest/index.html",
+  "release_level": "beta",
+  "transport": "grpc",
+  "language": "java",
+  "repo": "googleapis/java-retail",
+  "repo_short": "java-retail",
+  "distribution_name": "com.google.cloud:google-cloud-retail",
+  "api_id": "retail.googleapis.com",
+  "requires_billing": true
+}
\ No newline at end of file
diff --git a/CODE_OF_CONDUCT.md b/CODE_OF_CONDUCT.md
new file mode 100644
index 00000000..2add2547
--- /dev/null
+++ b/CODE_OF_CONDUCT.md
@@ -0,0 +1,94 @@
+<!-- # Generated by synthtool. DO NOT EDIT! !-->
+# Code of Conduct
+
+## Our Pledge
+
+In the interest of fostering an open and welcoming environment, we as
+contributors and maintainers pledge to making participation in our project and
+our community a harassment-free experience for everyone, regardless of age, body
+size, disability, ethnicity, gender identity and expression, level of
+experience, education, socio-economic status, nationality, personal appearance,
+race, religion, or sexual identity and orientation.
+
+## Our Standards
+
+Examples of behavior that contributes to creating a positive environment
+include:
+
+*   Using welcoming and inclusive language
+*   Being respectful of differing viewpoints and experiences
+*   Gracefully accepting constructive criticism
+*   Focusing on what is best for the community
+*   Showing empathy towards other community members
+
+Examples of unacceptable behavior by participants include:
+
+*   The use of sexualized language or imagery and unwelcome sexual attention or
+    advances
+*   Trolling, insulting/derogatory comments, and personal or political attacks
+*   Public or private harassment
+*   Publishing others' private information, such as a physical or electronic
+    address, without explicit permission
+*   Other conduct which could reasonably be considered inappropriate in a
+    professional setting
+
+## Our Responsibilities
+
+Project maintainers are responsible for clarifying the standards of acceptable
+behavior and are expected to take appropriate and fair corrective action in
+response to any instances of unacceptable behavior.
+
+Project maintainers have the right and responsibility to remove, edit, or reject
+comments, commits, code, wiki edits, issues, and other contributions that are
+not aligned to this Code of Conduct, or to ban temporarily or permanently any
+contributor for other behaviors that they deem inappropriate, threatening,
+offensive, or harmful.
+
+## Scope
+
+This Code of Conduct applies both within project spaces and in public spaces
+when an individual is representing the project or its community. Examples of
+representing a project or community include using an official project e-mail
+address, posting via an official social media account, or acting as an appointed
+representative at an online or offline event. Representation of a project may be
+further defined and clarified by project maintainers.
+
+This Code of Conduct also applies outside the project spaces when the Project
+Steward has a reasonable belief that an individual's behavior may have a
+negative impact on the project or its community.
+
+## Conflict Resolution
+
+We do not believe that all conflict is bad; healthy debate and disagreement
+often yield positive results. However, it is never okay to be disrespectful or
+to engage in behavior that violates the project’s code of conduct.
+
+If you see someone violating the code of conduct, you are encouraged to address
+the behavior directly with those involved. Many issues can be resolved quickly
+and easily, and this gives people more control over the outcome of their
+dispute. If you are unable to resolve the matter for any reason, or if the
+behavior is threatening or harassing, report it. We are dedicated to providing
+an environment where participants feel welcome and safe.
+
+Reports should be directed to *googleapis-stewards@google.com*, the
+Project Steward(s) for *Google Cloud Client Libraries*. It is the Project Steward’s duty to
+receive and address reported violations of the code of conduct. They will then
+work with a committee consisting of representatives from the Open Source
+Programs Office and the Google Open Source Strategy team. If for any reason you
+are uncomfortable reaching out to the Project Steward, please email
+opensource@google.com.
+
+We will investigate every complaint, but you may not receive a direct response.
+We will use our discretion in determining when and how to follow up on reported
+incidents, which may range from not taking action to permanent expulsion from
+the project and project-sponsored spaces. We will notify the accused of the
+report and provide them an opportunity to discuss it before any action is taken.
+The identity of the reporter will be omitted from the details of the report
+supplied to the accused. In potentially harmful situations, such as ongoing
+harassment or threats to anyone's safety, we may take action without notice.
+
+## Attribution
+
+This Code of Conduct is adapted from the Contributor Covenant, version 1.4,
+available at
+https://www.contributor-covenant.org/version/1/4/code-of-conduct.html
\ No newline at end of file
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
new file mode 100644
index 00000000..f2dbdee0
--- /dev/null
+++ b/CONTRIBUTING.md
@@ -0,0 +1,139 @@
+# How to Contribute
+
+We'd love to accept your patches and contributions to this project. There are
+just a few small guidelines you need to follow.
+
+## Contributor License Agreement
+
+Contributions to this project must be accompanied by a Contributor License
+Agreement. You (or your employer) retain the copyright to your contribution;
+this simply gives us permission to use and redistribute your contributions as
+part of the project. Head over to <https://cla.developers.google.com/> to see
+your current agreements on file or to sign a new one.
+
+You generally only need to submit a CLA once, so if you've already submitted one
+(even if it was for a different project), you probably don't need to do it
+again.
+
+## Code reviews
+
+All submissions, including submissions by project members, require review. We
+use GitHub pull requests for this purpose. Consult
+[GitHub Help](https://help.github.com/articles/about-pull-requests/) for more
+information on using pull requests.
+
+## Community Guidelines
+
+This project follows
+[Google's Open Source Community Guidelines](https://opensource.google.com/conduct/).
+
+## Building the project
+
+To build, package, and run all unit tests run the command
+
+```
+mvn clean verify
+```
+
+### Running Integration tests
+
+To include integration tests when building the project, you need access to
+a GCP Project with a valid service account. 
+
+For instructions on how to generate a service account and corresponding
+credentials JSON see: [Creating a Service Account][1].
+
+Then run the following to build, package, run all unit tests and run all
+integration tests.
+
+```bash
+export GOOGLE_APPLICATION_CREDENTIALS=/path/to/service/account.json
+mvn -Penable-integration-tests clean verify
+```
+
+## Code Samples
+
+Code Samples must be bundled in separate Maven modules, and guarded by a
+Maven profile with the name `enable-samples`.
+
+The samples must be separate from the primary project for a few reasons:
+1. Primary projects have a minimum Java version of Java 7 whereas samples have
+   a minimum Java version of Java 8. Due to this we need the ability to
+   selectively exclude samples from a build run.
+2. Many code samples depend on external GCP services and need
+   credentials to access the service.
+3. Code samples are not released as Maven artifacts and must be excluded from 
+   release builds.
+   
+### Building
+
+```bash
+mvn -Penable-samples clean verify
+```
+
+Some samples require access to GCP services and require a service account:
+
+```bash
+export GOOGLE_APPLICATION_CREDENTIALS=/path/to/service/account.json
+mvn -Penable-samples clean verify
+```
+
+### Profile Config
+
+1. To add samples in a profile to your Maven project, add the following to your
+`pom.xml`
+
+    ```xml
+    <project>
+      [...]
+      <profiles>
+        <profile>
+          <id>enable-samples</id>
+          <modules>
+            <module>sample</module>
+          </modules>
+        </profile>
+      </profiles>
+      [...]
+    </project>
+    ```
+
+2. [Activate](#profile-activation) the profile.
+3. Define your samples in a normal Maven project in the `samples/` directory.
+
+### Code Formatting
+
+Code in this repo is formatted with
+[google-java-format](https://github.com/google/google-java-format).
+To run formatting on your project, you can run:
+```
+mvn com.coveo:fmt-maven-plugin:format
+```
+
+### Profile Activation
+
+To include code samples when building and testing the project, enable the 
+`enable-samples` Maven profile.
+
+#### Command line
+
+To activate the Maven profile on the command line add `-Penable-samples` to your
+Maven command.
+
+#### Maven `settings.xml`
+
+To activate the Maven profile in your `~/.m2/settings.xml` add an entry of
+`enable-samples` following the instructions in [Active Profiles][2].
+
+This method has the benefit of applying to all projects you build (and is
+respected by IntelliJ IDEA) and is recommended if you are going to be
+contributing samples to several projects.
+
+#### IntelliJ IDEA
+
+To activate the Maven Profile inside IntelliJ IDEA, follow the instructions in
+[Activate Maven profiles][3] to activate `enable-samples`.
+
+[1]: https://cloud.google.com/docs/authentication/getting-started#creating_a_service_account
+[2]: https://maven.apache.org/settings.html#Active_Profiles
+[3]: https://www.jetbrains.com/help/idea/work-with-maven-profiles.html#activate_maven_profiles
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 00000000..d6456956
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,202 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
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+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
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+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
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+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
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+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
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+
+      "Work" shall mean the work of authorship, whether in Source or
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+      form, that is based on (or derived from) the Work and for which the
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+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
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+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
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+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
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+      subsequently incorporated within the Work.
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+   2. Grant of Copyright License. Subject to the terms and conditions of
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+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
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+   3. Grant of Patent License. Subject to the terms and conditions of
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+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
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+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
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+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
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+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
diff --git a/codecov.yaml b/codecov.yaml
new file mode 100644
index 00000000..5724ea94
--- /dev/null
+++ b/codecov.yaml
@@ -0,0 +1,4 @@
+---
+codecov:
+  ci:
+    - source.cloud.google.com
diff --git a/google-cloud-retail-bom/pom.xml b/google-cloud-retail-bom/pom.xml
new file mode 100644
index 00000000..122346f1
--- /dev/null
+++ b/google-cloud-retail-bom/pom.xml
@@ -0,0 +1,97 @@
+<?xml version="1.0"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <groupId>com.google.cloud</groupId>
+  <artifactId>google-cloud-retail-bom</artifactId>
+  <version>0.0.1-SNAPSHOT</version><!-- {x-version-update:google-cloud-retail:current} -->
+  <packaging>pom</packaging>
+  <parent>
+    <groupId>com.google.cloud</groupId>
+    <artifactId>google-cloud-shared-config</artifactId>
+    <version>0.9.2</version>
+  </parent>
+
+  <name>Google Cloud Retail BOM</name>
+  <url>https://github.com/googleapis/java-retail</url>
+  <description>
+    BOM for Cloud Retail
+  </description>
+
+  <organization>
+    <name>Google LLC</name>
+  </organization>
+
+  <developers>
+    <developer>
+      <id>chingor13</id>
+      <name>Jeff Ching</name>
+      <email>chingor@google.com</email>
+      <organization>Google LLC</organization>
+      <roles>
+        <role>Developer</role>
+      </roles>
+    </developer>
+  </developers>
+
+  <scm>
+    <connection>scm:git:https://github.com/googleapis/java-retail.git</connection>
+    <developerConnection>scm:git:git@github.com:googleapis/java-retail.git</developerConnection>
+    <url>https://github.com/googleapis/java-retail</url>
+  </scm>
+
+  <properties>
+    <maven.antrun.skip>true</maven.antrun.skip>
+  </properties>
+
+  <distributionManagement>
+    <snapshotRepository>
+      <id>sonatype-nexus-snapshots</id>
+      <url>https://oss.sonatype.org/content/repositories/snapshots</url>
+    </snapshotRepository>
+    <repository>
+      <id>sonatype-nexus-staging</id>
+      <url>https://oss.sonatype.org/service/local/staging/deploy/maven2/</url>
+    </repository>
+  </distributionManagement>
+
+  <licenses>
+    <license>
+      <name>The Apache Software License, Version 2.0</name>
+      <url>http://www.apache.org/licenses/LICENSE-2.0.txt</url>
+      <distribution>repo</distribution>
+    </license>
+  </licenses>
+
+  <dependencyManagement>
+    <dependencies>
+
+      <dependency>
+        <groupId>com.google.cloud</groupId>
+        <artifactId>google-cloud-retail</artifactId>
+        <version>0.0.1-SNAPSHOT</version><!-- {x-version-update:google-cloud-retail:current} -->
+      </dependency>
+      <dependency>
+        <groupId>com.google.api.grpc</groupId>
+        <artifactId>proto-google-cloud-retail-v2</artifactId>
+        <version>0.0.1-SNAPSHOT</version><!-- {x-version-update:proto-google-cloud-retail-v2:current} -->
+      </dependency>
+      <dependency>
+        <groupId>com.google.api.grpc</groupId>
+        <artifactId>grpc-google-cloud-retail-v2</artifactId>
+        <version>0.0.1-SNAPSHOT</version><!-- {x-version-update:grpc-google-cloud-retail-v2:current} -->
+      </dependency>
+    </dependencies>
+  </dependencyManagement>
+
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-checkstyle-plugin</artifactId>
+        <configuration>
+          <skip>true</skip>
+        </configuration>
+      </plugin>
+    </plugins>
+  </build>
+</project>
\ No newline at end of file
diff --git a/google-cloud-retail/pom.xml b/google-cloud-retail/pom.xml
new file mode 100644
index 00000000..17a217f2
--- /dev/null
+++ b/google-cloud-retail/pom.xml
@@ -0,0 +1,111 @@
+<?xml version="1.0"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <groupId>com.google.cloud</groupId>
+  <artifactId>google-cloud-retail</artifactId>
+  <version>0.0.1-SNAPSHOT</version><!-- {x-version-update:google-cloud-retail:current} -->
+  <packaging>jar</packaging>
+  <name>Google Cloud Retail</name>
+  <url>https://github.com/googleapis/java-retail</url>
+  <description>Retail solutions API.</description>
+  <parent>
+    <groupId>com.google.cloud</groupId>
+    <artifactId>google-cloud-retail-parent</artifactId>
+    <version>0.0.1-SNAPSHOT</version><!-- {x-version-update:google-cloud-retail:current} -->
+  </parent>
+  <properties>
+    <site.installationModule>google-cloud-retail</site.installationModule>
+  </properties>
+  <dependencies>
+    <dependency>
+      <groupId>io.grpc</groupId>
+      <artifactId>grpc-api</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>io.grpc</groupId>
+      <artifactId>grpc-stub</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>io.grpc</groupId>
+      <artifactId>grpc-protobuf</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>com.google.api</groupId>
+      <artifactId>api-common</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>com.google.protobuf</groupId>
+      <artifactId>protobuf-java</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>com.google.api.grpc</groupId>
+      <artifactId>proto-google-common-protos</artifactId>
+    </dependency>
+
+    <dependency>
+      <groupId>com.google.api.grpc</groupId>
+      <artifactId>proto-google-cloud-retail-v2</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>com.google.guava</groupId>
+      <artifactId>guava</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>com.google.api</groupId>
+      <artifactId>gax</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>com.google.api</groupId>
+      <artifactId>gax-grpc</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>org.threeten</groupId>
+      <artifactId>threetenbp</artifactId>
+    </dependency>
+
+    <!-- Test dependencies -->
+    <dependency>
+      <groupId>junit</groupId>
+      <artifactId>junit</artifactId>
+      <scope>test</scope>
+      <version>4.13</version>
+    </dependency>
+
+    <dependency>
+      <groupId>com.google.api.grpc</groupId>
+      <artifactId>grpc-google-cloud-retail-v2</artifactId>
+      <scope>test</scope>
+    </dependency>
+    <!-- Need testing utility classes for generated gRPC clients tests -->
+    <dependency>
+      <groupId>com.google.api</groupId>
+      <artifactId>gax-grpc</artifactId>
+      <classifier>testlib</classifier>
+      <scope>test</scope>
+    </dependency>
+  </dependencies>
+
+  <profiles>
+    <profile>
+      <id>java9</id>
+      <activation>
+        <jdk>[9,)</jdk>
+      </activation>
+      <dependencies>
+        <dependency>
+          <groupId>javax.annotation</groupId>
+          <artifactId>javax.annotation-api</artifactId>
+        </dependency>
+      </dependencies>
+    </profile>
+  </profiles>
+
+  <build>
+    <plugins>
+      <plugin>
+          <groupId>org.codehaus.mojo</groupId>
+          <artifactId>flatten-maven-plugin</artifactId>
+        </plugin>
+    </plugins>
+  </build>
+</project>
\ No newline at end of file
diff --git a/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/CatalogServiceClient.java b/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/CatalogServiceClient.java
new file mode 100644
index 00000000..ebadcae5
--- /dev/null
+++ b/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/CatalogServiceClient.java
@@ -0,0 +1,363 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.cloud.retail.v2;
+
+import com.google.api.core.ApiFunction;
+import com.google.api.core.ApiFuture;
+import com.google.api.core.ApiFutures;
+import com.google.api.core.BetaApi;
+import com.google.api.gax.core.BackgroundResource;
+import com.google.api.gax.paging.AbstractFixedSizeCollection;
+import com.google.api.gax.paging.AbstractPage;
+import com.google.api.gax.paging.AbstractPagedListResponse;
+import com.google.api.gax.rpc.PageContext;
+import com.google.api.gax.rpc.UnaryCallable;
+import com.google.cloud.retail.v2.stub.CatalogServiceStub;
+import com.google.cloud.retail.v2.stub.CatalogServiceStubSettings;
+import com.google.common.util.concurrent.MoreExecutors;
+import com.google.protobuf.FieldMask;
+import java.io.IOException;
+import java.util.List;
+import java.util.concurrent.TimeUnit;
+import javax.annotation.Generated;
+
+// AUTO-GENERATED DOCUMENTATION AND CLASS.
+/**
+ * Service Description: Service for managing catalog configuration.
+ *
+ * <p>This class provides the ability to make remote calls to the backing service through method
+ * calls that map to API methods. Sample code to get started:
+ *
+ * <p>Note: close() needs to be called on the CatalogServiceClient object to clean up resources such
+ * as threads. In the example above, try-with-resources is used, which automatically calls close().
+ *
+ * <p>The surface of this class includes several types of Java methods for each of the API's
+ * methods:
+ *
+ * <ol>
+ *   <li>A "flattened" method. With this type of method, the fields of the request type have been
+ *       converted into function parameters. It may be the case that not all fields are available as
+ *       parameters, and not every API method will have a flattened method entry point.
+ *   <li>A "request object" method. This type of method only takes one parameter, a request object,
+ *       which must be constructed before the call. Not every API method will have a request object
+ *       method.
+ *   <li>A "callable" method. This type of method takes no parameters and returns an immutable API
+ *       callable object, which can be used to initiate calls to the service.
+ * </ol>
+ *
+ * <p>See the individual methods for example code.
+ *
+ * <p>Many parameters require resource names to be formatted in a particular way. To assist with
+ * these names, this class includes a format method for each type of name, and additionally a parse
+ * method to extract the individual identifiers contained within names that are returned.
+ *
+ * <p>This class can be customized by passing in a custom instance of CatalogServiceSettings to
+ * create(). For example:
+ *
+ * <p>To customize credentials:
+ *
+ * <pre>{@code
+ * CatalogServiceSettings catalogServiceSettings =
+ *     CatalogServiceSettings.newBuilder()
+ *         .setCredentialsProvider(FixedCredentialsProvider.create(myCredentials))
+ *         .build();
+ * CatalogServiceClient catalogServiceClient = CatalogServiceClient.create(catalogServiceSettings);
+ * }</pre>
+ *
+ * <p>To customize the endpoint:
+ *
+ * <pre>{@code
+ * CatalogServiceSettings catalogServiceSettings =
+ *     CatalogServiceSettings.newBuilder().setEndpoint(myEndpoint).build();
+ * CatalogServiceClient catalogServiceClient = CatalogServiceClient.create(catalogServiceSettings);
+ * }</pre>
+ *
+ * <p>Please refer to the GitHub repository's samples for more quickstart code snippets.
+ */
+@BetaApi
+@Generated("by gapic-generator")
+public class CatalogServiceClient implements BackgroundResource {
+  private final CatalogServiceSettings settings;
+  private final CatalogServiceStub stub;
+
+  /** Constructs an instance of CatalogServiceClient with default settings. */
+  public static final CatalogServiceClient create() throws IOException {
+    return create(CatalogServiceSettings.newBuilder().build());
+  }
+
+  /**
+   * Constructs an instance of CatalogServiceClient, using the given settings. The channels are
+   * created based on the settings passed in, or defaults for any settings that are not set.
+   */
+  public static final CatalogServiceClient create(CatalogServiceSettings settings)
+      throws IOException {
+    return new CatalogServiceClient(settings);
+  }
+
+  /**
+   * Constructs an instance of CatalogServiceClient, using the given stub for making calls. This is
+   * for advanced usage - prefer using create(CatalogServiceSettings).
+   */
+  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
+  public static final CatalogServiceClient create(CatalogServiceStub stub) {
+    return new CatalogServiceClient(stub);
+  }
+
+  /**
+   * Constructs an instance of CatalogServiceClient, using the given settings. This is protected so
+   * that it is easy to make a subclass, but otherwise, the static factory methods should be
+   * preferred.
+   */
+  protected CatalogServiceClient(CatalogServiceSettings settings) throws IOException {
+    this.settings = settings;
+    this.stub = ((CatalogServiceStubSettings) settings.getStubSettings()).createStub();
+  }
+
+  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
+  protected CatalogServiceClient(CatalogServiceStub stub) {
+    this.settings = null;
+    this.stub = stub;
+  }
+
+  public final CatalogServiceSettings getSettings() {
+    return settings;
+  }
+
+  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
+  public CatalogServiceStub getStub() {
+    return stub;
+  }
+
+  // AUTO-GENERATED DOCUMENTATION AND METHOD.
+  /**
+   * Lists all the [Catalog][google.cloud.retail.v2.Catalog]s associated with the project.
+   *
+   * @param parent Required. The account resource name with an associated location.
+   *     <p>If the caller does not have permission to list
+   *     [Catalog][google.cloud.retail.v2.Catalog]s under this location, regardless of whether or
+   *     not this location exists, a PERMISSION_DENIED error is returned.
+   * @throws com.google.api.gax.rpc.ApiException if the remote call fails
+   */
+  public final ListCatalogsPagedResponse listCatalogs(LocationName parent) {
+    ListCatalogsRequest request =
+        ListCatalogsRequest.newBuilder()
+            .setParent(parent == null ? null : parent.toString())
+            .build();
+    return listCatalogs(request);
+  }
+
+  // AUTO-GENERATED DOCUMENTATION AND METHOD.
+  /**
+   * Lists all the [Catalog][google.cloud.retail.v2.Catalog]s associated with the project.
+   *
+   * @param parent Required. The account resource name with an associated location.
+   *     <p>If the caller does not have permission to list
+   *     [Catalog][google.cloud.retail.v2.Catalog]s under this location, regardless of whether or
+   *     not this location exists, a PERMISSION_DENIED error is returned.
+   * @throws com.google.api.gax.rpc.ApiException if the remote call fails
+   */
+  public final ListCatalogsPagedResponse listCatalogs(String parent) {
+    ListCatalogsRequest request = ListCatalogsRequest.newBuilder().setParent(parent).build();
+    return listCatalogs(request);
+  }
+
+  // AUTO-GENERATED DOCUMENTATION AND METHOD.
+  /**
+   * Lists all the [Catalog][google.cloud.retail.v2.Catalog]s associated with the project.
+   *
+   * @param request The request object containing all of the parameters for the API call.
+   * @throws com.google.api.gax.rpc.ApiException if the remote call fails
+   */
+  public final ListCatalogsPagedResponse listCatalogs(ListCatalogsRequest request) {
+    return listCatalogsPagedCallable().call(request);
+  }
+
+  // AUTO-GENERATED DOCUMENTATION AND METHOD.
+  /**
+   * Lists all the [Catalog][google.cloud.retail.v2.Catalog]s associated with the project.
+   *
+   * <p>Sample code:
+   */
+  public final UnaryCallable<ListCatalogsRequest, ListCatalogsPagedResponse>
+      listCatalogsPagedCallable() {
+    return stub.listCatalogsPagedCallable();
+  }
+
+  // AUTO-GENERATED DOCUMENTATION AND METHOD.
+  /**
+   * Lists all the [Catalog][google.cloud.retail.v2.Catalog]s associated with the project.
+   *
+   * <p>Sample code:
+   */
+  public final UnaryCallable<ListCatalogsRequest, ListCatalogsResponse> listCatalogsCallable() {
+    return stub.listCatalogsCallable();
+  }
+
+  // AUTO-GENERATED DOCUMENTATION AND METHOD.
+  /**
+   * Updates the [Catalog][google.cloud.retail.v2.Catalog]s.
+   *
+   * @param catalog Required. The [Catalog][google.cloud.retail.v2.Catalog] to update.
+   *     <p>If the caller does not have permission to update the
+   *     [Catalog][google.cloud.retail.v2.Catalog], regardless of whether or not it exists, a
+   *     PERMISSION_DENIED error is returned.
+   *     <p>If the [Catalog][google.cloud.retail.v2.Catalog] to update does not exist, a NOT_FOUND
+   *     error is returned.
+   * @param updateMask Indicates which fields in the provided
+   *     [Catalog][google.cloud.retail.v2.Catalog] to update. If not set, will only update the
+   *     [Catalog.product_level_config][google.cloud.retail.v2.Catalog.product_level_config] field,
+   *     which is also the only currently supported field to update.
+   *     <p>If an unsupported or unknown field is provided, an INVALID_ARGUMENT error is returned.
+   * @throws com.google.api.gax.rpc.ApiException if the remote call fails
+   */
+  public final Catalog updateCatalog(Catalog catalog, FieldMask updateMask) {
+    UpdateCatalogRequest request =
+        UpdateCatalogRequest.newBuilder().setCatalog(catalog).setUpdateMask(updateMask).build();
+    return updateCatalog(request);
+  }
+
+  // AUTO-GENERATED DOCUMENTATION AND METHOD.
+  /**
+   * Updates the [Catalog][google.cloud.retail.v2.Catalog]s.
+   *
+   * @param request The request object containing all of the parameters for the API call.
+   * @throws com.google.api.gax.rpc.ApiException if the remote call fails
+   */
+  public final Catalog updateCatalog(UpdateCatalogRequest request) {
+    return updateCatalogCallable().call(request);
+  }
+
+  // AUTO-GENERATED DOCUMENTATION AND METHOD.
+  /**
+   * Updates the [Catalog][google.cloud.retail.v2.Catalog]s.
+   *
+   * <p>Sample code:
+   */
+  public final UnaryCallable<UpdateCatalogRequest, Catalog> updateCatalogCallable() {
+    return stub.updateCatalogCallable();
+  }
+
+  @Override
+  public final void close() {
+    stub.close();
+  }
+
+  @Override
+  public void shutdown() {
+    stub.shutdown();
+  }
+
+  @Override
+  public boolean isShutdown() {
+    return stub.isShutdown();
+  }
+
+  @Override
+  public boolean isTerminated() {
+    return stub.isTerminated();
+  }
+
+  @Override
+  public void shutdownNow() {
+    stub.shutdownNow();
+  }
+
+  @Override
+  public boolean awaitTermination(long duration, TimeUnit unit) throws InterruptedException {
+    return stub.awaitTermination(duration, unit);
+  }
+
+  public static class ListCatalogsPagedResponse
+      extends AbstractPagedListResponse<
+          ListCatalogsRequest,
+          ListCatalogsResponse,
+          Catalog,
+          ListCatalogsPage,
+          ListCatalogsFixedSizeCollection> {
+
+    public static ApiFuture<ListCatalogsPagedResponse> createAsync(
+        PageContext<ListCatalogsRequest, ListCatalogsResponse, Catalog> context,
+        ApiFuture<ListCatalogsResponse> futureResponse) {
+      ApiFuture<ListCatalogsPage> futurePage =
+          ListCatalogsPage.createEmptyPage().createPageAsync(context, futureResponse);
+      return ApiFutures.transform(
+          futurePage,
+          new ApiFunction<ListCatalogsPage, ListCatalogsPagedResponse>() {
+            @Override
+            public ListCatalogsPagedResponse apply(ListCatalogsPage input) {
+              return new ListCatalogsPagedResponse(input);
+            }
+          },
+          MoreExecutors.directExecutor());
+    }
+
+    private ListCatalogsPagedResponse(ListCatalogsPage page) {
+      super(page, ListCatalogsFixedSizeCollection.createEmptyCollection());
+    }
+  }
+
+  public static class ListCatalogsPage
+      extends AbstractPage<ListCatalogsRequest, ListCatalogsResponse, Catalog, ListCatalogsPage> {
+
+    private ListCatalogsPage(
+        PageContext<ListCatalogsRequest, ListCatalogsResponse, Catalog> context,
+        ListCatalogsResponse response) {
+      super(context, response);
+    }
+
+    private static ListCatalogsPage createEmptyPage() {
+      return new ListCatalogsPage(null, null);
+    }
+
+    @Override
+    protected ListCatalogsPage createPage(
+        PageContext<ListCatalogsRequest, ListCatalogsResponse, Catalog> context,
+        ListCatalogsResponse response) {
+      return new ListCatalogsPage(context, response);
+    }
+
+    @Override
+    public ApiFuture<ListCatalogsPage> createPageAsync(
+        PageContext<ListCatalogsRequest, ListCatalogsResponse, Catalog> context,
+        ApiFuture<ListCatalogsResponse> futureResponse) {
+      return super.createPageAsync(context, futureResponse);
+    }
+  }
+
+  public static class ListCatalogsFixedSizeCollection
+      extends AbstractFixedSizeCollection<
+          ListCatalogsRequest,
+          ListCatalogsResponse,
+          Catalog,
+          ListCatalogsPage,
+          ListCatalogsFixedSizeCollection> {
+
+    private ListCatalogsFixedSizeCollection(List<ListCatalogsPage> pages, int collectionSize) {
+      super(pages, collectionSize);
+    }
+
+    private static ListCatalogsFixedSizeCollection createEmptyCollection() {
+      return new ListCatalogsFixedSizeCollection(null, 0);
+    }
+
+    @Override
+    protected ListCatalogsFixedSizeCollection createCollection(
+        List<ListCatalogsPage> pages, int collectionSize) {
+      return new ListCatalogsFixedSizeCollection(pages, collectionSize);
+    }
+  }
+}
diff --git a/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/CatalogServiceSettings.java b/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/CatalogServiceSettings.java
new file mode 100644
index 00000000..926050d9
--- /dev/null
+++ b/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/CatalogServiceSettings.java
@@ -0,0 +1,198 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.cloud.retail.v2;
+
+import static com.google.cloud.retail.v2.CatalogServiceClient.ListCatalogsPagedResponse;
+
+import com.google.api.core.ApiFunction;
+import com.google.api.core.BetaApi;
+import com.google.api.gax.core.GoogleCredentialsProvider;
+import com.google.api.gax.core.InstantiatingExecutorProvider;
+import com.google.api.gax.grpc.InstantiatingGrpcChannelProvider;
+import com.google.api.gax.rpc.ApiClientHeaderProvider;
+import com.google.api.gax.rpc.ClientContext;
+import com.google.api.gax.rpc.ClientSettings;
+import com.google.api.gax.rpc.PagedCallSettings;
+import com.google.api.gax.rpc.TransportChannelProvider;
+import com.google.api.gax.rpc.UnaryCallSettings;
+import com.google.cloud.retail.v2.stub.CatalogServiceStubSettings;
+import java.io.IOException;
+import java.util.List;
+import javax.annotation.Generated;
+
+// AUTO-GENERATED DOCUMENTATION AND CLASS.
+/**
+ * Settings class to configure an instance of {@link CatalogServiceClient}.
+ *
+ * <p>The default instance has everything set to sensible defaults:
+ *
+ * <ul>
+ *   <li>The default service address (retail.googleapis.com) and default port (443) are used.
+ *   <li>Credentials are acquired automatically through Application Default Credentials.
+ *   <li>Retries are configured for idempotent methods but not for non-idempotent methods.
+ * </ul>
+ *
+ * <p>The builder of this class is recursive, so contained classes are themselves builders. When
+ * build() is called, the tree of builders is called to create the complete settings object.
+ *
+ * <p>For example, to set the total timeout of updateCatalog to 30 seconds:
+ *
+ * <pre>{@code
+ * CatalogServiceSettings.Builder catalogServiceSettingsBuilder =
+ *     CatalogServiceSettings.newBuilder();
+ * catalogServiceSettingsBuilder
+ *     .updateCatalogSettings()
+ *     .setRetrySettings(
+ *         catalogServiceSettingsBuilder
+ *             .updateCatalogSettings()
+ *             .getRetrySettings()
+ *             .toBuilder()
+ *             .setTotalTimeout(Duration.ofSeconds(30))
+ *             .build());
+ * CatalogServiceSettings catalogServiceSettings = catalogServiceSettingsBuilder.build();
+ * }</pre>
+ */
+@Generated("by gapic-generator-java")
+public class CatalogServiceSettings extends ClientSettings<CatalogServiceSettings> {
+
+  /** Returns the object with the settings used for calls to listCatalogs. */
+  public PagedCallSettings<ListCatalogsRequest, ListCatalogsResponse, ListCatalogsPagedResponse>
+      listCatalogsSettings() {
+    return ((CatalogServiceStubSettings) getStubSettings()).listCatalogsSettings();
+  }
+
+  /** Returns the object with the settings used for calls to updateCatalog. */
+  public UnaryCallSettings<UpdateCatalogRequest, Catalog> updateCatalogSettings() {
+    return ((CatalogServiceStubSettings) getStubSettings()).updateCatalogSettings();
+  }
+
+  public static final CatalogServiceSettings create(CatalogServiceStubSettings stub)
+      throws IOException {
+    return new CatalogServiceSettings.Builder(stub.toBuilder()).build();
+  }
+
+  /** Returns a builder for the default ExecutorProvider for this service. */
+  public static InstantiatingExecutorProvider.Builder defaultExecutorProviderBuilder() {
+    return CatalogServiceStubSettings.defaultExecutorProviderBuilder();
+  }
+
+  /** Returns the default service endpoint. */
+  public static String getDefaultEndpoint() {
+    return CatalogServiceStubSettings.getDefaultEndpoint();
+  }
+
+  /** Returns the default service scopes. */
+  public static List<String> getDefaultServiceScopes() {
+    return CatalogServiceStubSettings.getDefaultServiceScopes();
+  }
+
+  /** Returns a builder for the default credentials for this service. */
+  public static GoogleCredentialsProvider.Builder defaultCredentialsProviderBuilder() {
+    return CatalogServiceStubSettings.defaultCredentialsProviderBuilder();
+  }
+
+  /** Returns a builder for the default ChannelProvider for this service. */
+  public static InstantiatingGrpcChannelProvider.Builder defaultGrpcTransportProviderBuilder() {
+    return CatalogServiceStubSettings.defaultGrpcTransportProviderBuilder();
+  }
+
+  public static TransportChannelProvider defaultTransportChannelProvider() {
+    return CatalogServiceStubSettings.defaultTransportChannelProvider();
+  }
+
+  @BetaApi("The surface for customizing headers is not stable yet and may change in the future.")
+  public static ApiClientHeaderProvider.Builder defaultApiClientHeaderProviderBuilder() {
+    return CatalogServiceStubSettings.defaultApiClientHeaderProviderBuilder();
+  }
+
+  /** Returns a new builder for this class. */
+  public static Builder newBuilder() {
+    return Builder.createDefault();
+  }
+
+  /** Returns a new builder for this class. */
+  public static Builder newBuilder(ClientContext clientContext) {
+    return new Builder(clientContext);
+  }
+
+  /** Returns a builder containing all the values of this settings class. */
+  public Builder toBuilder() {
+    return new Builder(this);
+  }
+
+  protected CatalogServiceSettings(Builder settingsBuilder) throws IOException {
+    super(settingsBuilder);
+  }
+
+  /** Builder for CatalogServiceSettings. */
+  public static class Builder extends ClientSettings.Builder<CatalogServiceSettings, Builder> {
+
+    protected Builder() throws IOException {
+      this(((ClientContext) null));
+    }
+
+    protected Builder(ClientContext clientContext) {
+      super(CatalogServiceStubSettings.newBuilder(clientContext));
+    }
+
+    protected Builder(CatalogServiceSettings settings) {
+      super(settings.getStubSettings().toBuilder());
+    }
+
+    protected Builder(CatalogServiceStubSettings.Builder stubSettings) {
+      super(stubSettings);
+    }
+
+    private static Builder createDefault() {
+      return new Builder(CatalogServiceStubSettings.newBuilder());
+    }
+
+    public CatalogServiceStubSettings.Builder getStubSettingsBuilder() {
+      return ((CatalogServiceStubSettings.Builder) getStubSettings());
+    }
+
+    // NEXT_MAJOR_VER: remove 'throws Exception'.
+    /**
+     * Applies the given settings updater function to all of the unary API methods in this service.
+     *
+     * <p>Note: This method does not support applying settings to streaming methods.
+     */
+    public Builder applyToAllUnaryMethods(
+        ApiFunction<UnaryCallSettings.Builder<?, ?>, Void> settingsUpdater) throws Exception {
+      super.applyToAllUnaryMethods(
+          getStubSettingsBuilder().unaryMethodSettingsBuilders(), settingsUpdater);
+      return this;
+    }
+
+    /** Returns the builder for the settings used for calls to listCatalogs. */
+    public PagedCallSettings.Builder<
+            ListCatalogsRequest, ListCatalogsResponse, ListCatalogsPagedResponse>
+        listCatalogsSettings() {
+      return getStubSettingsBuilder().listCatalogsSettings();
+    }
+
+    /** Returns the builder for the settings used for calls to updateCatalog. */
+    public UnaryCallSettings.Builder<UpdateCatalogRequest, Catalog> updateCatalogSettings() {
+      return getStubSettingsBuilder().updateCatalogSettings();
+    }
+
+    @Override
+    public CatalogServiceSettings build() throws IOException {
+      return new CatalogServiceSettings(this);
+    }
+  }
+}
diff --git a/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/PredictionServiceClient.java b/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/PredictionServiceClient.java
new file mode 100644
index 00000000..f6785d04
--- /dev/null
+++ b/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/PredictionServiceClient.java
@@ -0,0 +1,188 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.cloud.retail.v2;
+
+import com.google.api.core.BetaApi;
+import com.google.api.gax.core.BackgroundResource;
+import com.google.api.gax.rpc.UnaryCallable;
+import com.google.cloud.retail.v2.stub.PredictionServiceStub;
+import com.google.cloud.retail.v2.stub.PredictionServiceStubSettings;
+import java.io.IOException;
+import java.util.concurrent.TimeUnit;
+import javax.annotation.Generated;
+
+// AUTO-GENERATED DOCUMENTATION AND CLASS.
+/**
+ * Service Description: Service for making recommendation prediction.
+ *
+ * <p>This class provides the ability to make remote calls to the backing service through method
+ * calls that map to API methods. Sample code to get started:
+ *
+ * <p>Note: close() needs to be called on the PredictionServiceClient object to clean up resources
+ * such as threads. In the example above, try-with-resources is used, which automatically calls
+ * close().
+ *
+ * <p>The surface of this class includes several types of Java methods for each of the API's
+ * methods:
+ *
+ * <ol>
+ *   <li>A "flattened" method. With this type of method, the fields of the request type have been
+ *       converted into function parameters. It may be the case that not all fields are available as
+ *       parameters, and not every API method will have a flattened method entry point.
+ *   <li>A "request object" method. This type of method only takes one parameter, a request object,
+ *       which must be constructed before the call. Not every API method will have a request object
+ *       method.
+ *   <li>A "callable" method. This type of method takes no parameters and returns an immutable API
+ *       callable object, which can be used to initiate calls to the service.
+ * </ol>
+ *
+ * <p>See the individual methods for example code.
+ *
+ * <p>Many parameters require resource names to be formatted in a particular way. To assist with
+ * these names, this class includes a format method for each type of name, and additionally a parse
+ * method to extract the individual identifiers contained within names that are returned.
+ *
+ * <p>This class can be customized by passing in a custom instance of PredictionServiceSettings to
+ * create(). For example:
+ *
+ * <p>To customize credentials:
+ *
+ * <pre>{@code
+ * PredictionServiceSettings predictionServiceSettings =
+ *     PredictionServiceSettings.newBuilder()
+ *         .setCredentialsProvider(FixedCredentialsProvider.create(myCredentials))
+ *         .build();
+ * PredictionServiceClient predictionServiceClient =
+ *     PredictionServiceClient.create(predictionServiceSettings);
+ * }</pre>
+ *
+ * <p>To customize the endpoint:
+ *
+ * <pre>{@code
+ * PredictionServiceSettings predictionServiceSettings =
+ *     PredictionServiceSettings.newBuilder().setEndpoint(myEndpoint).build();
+ * PredictionServiceClient predictionServiceClient =
+ *     PredictionServiceClient.create(predictionServiceSettings);
+ * }</pre>
+ *
+ * <p>Please refer to the GitHub repository's samples for more quickstart code snippets.
+ */
+@BetaApi
+@Generated("by gapic-generator")
+public class PredictionServiceClient implements BackgroundResource {
+  private final PredictionServiceSettings settings;
+  private final PredictionServiceStub stub;
+
+  /** Constructs an instance of PredictionServiceClient with default settings. */
+  public static final PredictionServiceClient create() throws IOException {
+    return create(PredictionServiceSettings.newBuilder().build());
+  }
+
+  /**
+   * Constructs an instance of PredictionServiceClient, using the given settings. The channels are
+   * created based on the settings passed in, or defaults for any settings that are not set.
+   */
+  public static final PredictionServiceClient create(PredictionServiceSettings settings)
+      throws IOException {
+    return new PredictionServiceClient(settings);
+  }
+
+  /**
+   * Constructs an instance of PredictionServiceClient, using the given stub for making calls. This
+   * is for advanced usage - prefer using create(PredictionServiceSettings).
+   */
+  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
+  public static final PredictionServiceClient create(PredictionServiceStub stub) {
+    return new PredictionServiceClient(stub);
+  }
+
+  /**
+   * Constructs an instance of PredictionServiceClient, using the given settings. This is protected
+   * so that it is easy to make a subclass, but otherwise, the static factory methods should be
+   * preferred.
+   */
+  protected PredictionServiceClient(PredictionServiceSettings settings) throws IOException {
+    this.settings = settings;
+    this.stub = ((PredictionServiceStubSettings) settings.getStubSettings()).createStub();
+  }
+
+  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
+  protected PredictionServiceClient(PredictionServiceStub stub) {
+    this.settings = null;
+    this.stub = stub;
+  }
+
+  public final PredictionServiceSettings getSettings() {
+    return settings;
+  }
+
+  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
+  public PredictionServiceStub getStub() {
+    return stub;
+  }
+
+  // AUTO-GENERATED DOCUMENTATION AND METHOD.
+  /**
+   * Makes a recommendation prediction.
+   *
+   * @param request The request object containing all of the parameters for the API call.
+   * @throws com.google.api.gax.rpc.ApiException if the remote call fails
+   */
+  public final PredictResponse predict(PredictRequest request) {
+    return predictCallable().call(request);
+  }
+
+  // AUTO-GENERATED DOCUMENTATION AND METHOD.
+  /**
+   * Makes a recommendation prediction.
+   *
+   * <p>Sample code:
+   */
+  public final UnaryCallable<PredictRequest, PredictResponse> predictCallable() {
+    return stub.predictCallable();
+  }
+
+  @Override
+  public final void close() {
+    stub.close();
+  }
+
+  @Override
+  public void shutdown() {
+    stub.shutdown();
+  }
+
+  @Override
+  public boolean isShutdown() {
+    return stub.isShutdown();
+  }
+
+  @Override
+  public boolean isTerminated() {
+    return stub.isTerminated();
+  }
+
+  @Override
+  public void shutdownNow() {
+    stub.shutdownNow();
+  }
+
+  @Override
+  public boolean awaitTermination(long duration, TimeUnit unit) throws InterruptedException {
+    return stub.awaitTermination(duration, unit);
+  }
+}
diff --git a/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/PredictionServiceSettings.java b/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/PredictionServiceSettings.java
new file mode 100644
index 00000000..9602cd5b
--- /dev/null
+++ b/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/PredictionServiceSettings.java
@@ -0,0 +1,182 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.cloud.retail.v2;
+
+import com.google.api.core.ApiFunction;
+import com.google.api.core.BetaApi;
+import com.google.api.gax.core.GoogleCredentialsProvider;
+import com.google.api.gax.core.InstantiatingExecutorProvider;
+import com.google.api.gax.grpc.InstantiatingGrpcChannelProvider;
+import com.google.api.gax.rpc.ApiClientHeaderProvider;
+import com.google.api.gax.rpc.ClientContext;
+import com.google.api.gax.rpc.ClientSettings;
+import com.google.api.gax.rpc.TransportChannelProvider;
+import com.google.api.gax.rpc.UnaryCallSettings;
+import com.google.cloud.retail.v2.stub.PredictionServiceStubSettings;
+import java.io.IOException;
+import java.util.List;
+import javax.annotation.Generated;
+
+// AUTO-GENERATED DOCUMENTATION AND CLASS.
+/**
+ * Settings class to configure an instance of {@link PredictionServiceClient}.
+ *
+ * <p>The default instance has everything set to sensible defaults:
+ *
+ * <ul>
+ *   <li>The default service address (retail.googleapis.com) and default port (443) are used.
+ *   <li>Credentials are acquired automatically through Application Default Credentials.
+ *   <li>Retries are configured for idempotent methods but not for non-idempotent methods.
+ * </ul>
+ *
+ * <p>The builder of this class is recursive, so contained classes are themselves builders. When
+ * build() is called, the tree of builders is called to create the complete settings object.
+ *
+ * <p>For example, to set the total timeout of predict to 30 seconds:
+ *
+ * <pre>{@code
+ * PredictionServiceSettings.Builder predictionServiceSettingsBuilder =
+ *     PredictionServiceSettings.newBuilder();
+ * predictionServiceSettingsBuilder
+ *     .predictSettings()
+ *     .setRetrySettings(
+ *         predictionServiceSettingsBuilder
+ *             .predictSettings()
+ *             .getRetrySettings()
+ *             .toBuilder()
+ *             .setTotalTimeout(Duration.ofSeconds(30))
+ *             .build());
+ * PredictionServiceSettings predictionServiceSettings = predictionServiceSettingsBuilder.build();
+ * }</pre>
+ */
+@Generated("by gapic-generator-java")
+public class PredictionServiceSettings extends ClientSettings<PredictionServiceSettings> {
+
+  /** Returns the object with the settings used for calls to predict. */
+  public UnaryCallSettings<PredictRequest, PredictResponse> predictSettings() {
+    return ((PredictionServiceStubSettings) getStubSettings()).predictSettings();
+  }
+
+  public static final PredictionServiceSettings create(PredictionServiceStubSettings stub)
+      throws IOException {
+    return new PredictionServiceSettings.Builder(stub.toBuilder()).build();
+  }
+
+  /** Returns a builder for the default ExecutorProvider for this service. */
+  public static InstantiatingExecutorProvider.Builder defaultExecutorProviderBuilder() {
+    return PredictionServiceStubSettings.defaultExecutorProviderBuilder();
+  }
+
+  /** Returns the default service endpoint. */
+  public static String getDefaultEndpoint() {
+    return PredictionServiceStubSettings.getDefaultEndpoint();
+  }
+
+  /** Returns the default service scopes. */
+  public static List<String> getDefaultServiceScopes() {
+    return PredictionServiceStubSettings.getDefaultServiceScopes();
+  }
+
+  /** Returns a builder for the default credentials for this service. */
+  public static GoogleCredentialsProvider.Builder defaultCredentialsProviderBuilder() {
+    return PredictionServiceStubSettings.defaultCredentialsProviderBuilder();
+  }
+
+  /** Returns a builder for the default ChannelProvider for this service. */
+  public static InstantiatingGrpcChannelProvider.Builder defaultGrpcTransportProviderBuilder() {
+    return PredictionServiceStubSettings.defaultGrpcTransportProviderBuilder();
+  }
+
+  public static TransportChannelProvider defaultTransportChannelProvider() {
+    return PredictionServiceStubSettings.defaultTransportChannelProvider();
+  }
+
+  @BetaApi("The surface for customizing headers is not stable yet and may change in the future.")
+  public static ApiClientHeaderProvider.Builder defaultApiClientHeaderProviderBuilder() {
+    return PredictionServiceStubSettings.defaultApiClientHeaderProviderBuilder();
+  }
+
+  /** Returns a new builder for this class. */
+  public static Builder newBuilder() {
+    return Builder.createDefault();
+  }
+
+  /** Returns a new builder for this class. */
+  public static Builder newBuilder(ClientContext clientContext) {
+    return new Builder(clientContext);
+  }
+
+  /** Returns a builder containing all the values of this settings class. */
+  public Builder toBuilder() {
+    return new Builder(this);
+  }
+
+  protected PredictionServiceSettings(Builder settingsBuilder) throws IOException {
+    super(settingsBuilder);
+  }
+
+  /** Builder for PredictionServiceSettings. */
+  public static class Builder extends ClientSettings.Builder<PredictionServiceSettings, Builder> {
+
+    protected Builder() throws IOException {
+      this(((ClientContext) null));
+    }
+
+    protected Builder(ClientContext clientContext) {
+      super(PredictionServiceStubSettings.newBuilder(clientContext));
+    }
+
+    protected Builder(PredictionServiceSettings settings) {
+      super(settings.getStubSettings().toBuilder());
+    }
+
+    protected Builder(PredictionServiceStubSettings.Builder stubSettings) {
+      super(stubSettings);
+    }
+
+    private static Builder createDefault() {
+      return new Builder(PredictionServiceStubSettings.newBuilder());
+    }
+
+    public PredictionServiceStubSettings.Builder getStubSettingsBuilder() {
+      return ((PredictionServiceStubSettings.Builder) getStubSettings());
+    }
+
+    // NEXT_MAJOR_VER: remove 'throws Exception'.
+    /**
+     * Applies the given settings updater function to all of the unary API methods in this service.
+     *
+     * <p>Note: This method does not support applying settings to streaming methods.
+     */
+    public Builder applyToAllUnaryMethods(
+        ApiFunction<UnaryCallSettings.Builder<?, ?>, Void> settingsUpdater) throws Exception {
+      super.applyToAllUnaryMethods(
+          getStubSettingsBuilder().unaryMethodSettingsBuilders(), settingsUpdater);
+      return this;
+    }
+
+    /** Returns the builder for the settings used for calls to predict. */
+    public UnaryCallSettings.Builder<PredictRequest, PredictResponse> predictSettings() {
+      return getStubSettingsBuilder().predictSettings();
+    }
+
+    @Override
+    public PredictionServiceSettings build() throws IOException {
+      return new PredictionServiceSettings(this);
+    }
+  }
+}
diff --git a/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/ProductServiceClient.java b/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/ProductServiceClient.java
new file mode 100644
index 00000000..973d9a1e
--- /dev/null
+++ b/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/ProductServiceClient.java
@@ -0,0 +1,474 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.cloud.retail.v2;
+
+import com.google.api.core.BetaApi;
+import com.google.api.gax.core.BackgroundResource;
+import com.google.api.gax.longrunning.OperationFuture;
+import com.google.api.gax.rpc.OperationCallable;
+import com.google.api.gax.rpc.UnaryCallable;
+import com.google.cloud.retail.v2.stub.ProductServiceStub;
+import com.google.cloud.retail.v2.stub.ProductServiceStubSettings;
+import com.google.longrunning.Operation;
+import com.google.longrunning.OperationsClient;
+import com.google.protobuf.Empty;
+import com.google.protobuf.FieldMask;
+import java.io.IOException;
+import java.util.concurrent.TimeUnit;
+import javax.annotation.Generated;
+
+// AUTO-GENERATED DOCUMENTATION AND CLASS.
+/**
+ * Service Description: Service for ingesting [Product][google.cloud.retail.v2.Product] information
+ * of the customer's website.
+ *
+ * <p>This class provides the ability to make remote calls to the backing service through method
+ * calls that map to API methods. Sample code to get started:
+ *
+ * <p>Note: close() needs to be called on the ProductServiceClient object to clean up resources such
+ * as threads. In the example above, try-with-resources is used, which automatically calls close().
+ *
+ * <p>The surface of this class includes several types of Java methods for each of the API's
+ * methods:
+ *
+ * <ol>
+ *   <li>A "flattened" method. With this type of method, the fields of the request type have been
+ *       converted into function parameters. It may be the case that not all fields are available as
+ *       parameters, and not every API method will have a flattened method entry point.
+ *   <li>A "request object" method. This type of method only takes one parameter, a request object,
+ *       which must be constructed before the call. Not every API method will have a request object
+ *       method.
+ *   <li>A "callable" method. This type of method takes no parameters and returns an immutable API
+ *       callable object, which can be used to initiate calls to the service.
+ * </ol>
+ *
+ * <p>See the individual methods for example code.
+ *
+ * <p>Many parameters require resource names to be formatted in a particular way. To assist with
+ * these names, this class includes a format method for each type of name, and additionally a parse
+ * method to extract the individual identifiers contained within names that are returned.
+ *
+ * <p>This class can be customized by passing in a custom instance of ProductServiceSettings to
+ * create(). For example:
+ *
+ * <p>To customize credentials:
+ *
+ * <pre>{@code
+ * ProductServiceSettings productServiceSettings =
+ *     ProductServiceSettings.newBuilder()
+ *         .setCredentialsProvider(FixedCredentialsProvider.create(myCredentials))
+ *         .build();
+ * ProductServiceClient productServiceClient = ProductServiceClient.create(productServiceSettings);
+ * }</pre>
+ *
+ * <p>To customize the endpoint:
+ *
+ * <pre>{@code
+ * ProductServiceSettings productServiceSettings =
+ *     ProductServiceSettings.newBuilder().setEndpoint(myEndpoint).build();
+ * ProductServiceClient productServiceClient = ProductServiceClient.create(productServiceSettings);
+ * }</pre>
+ *
+ * <p>Please refer to the GitHub repository's samples for more quickstart code snippets.
+ */
+@BetaApi
+@Generated("by gapic-generator")
+public class ProductServiceClient implements BackgroundResource {
+  private final ProductServiceSettings settings;
+  private final ProductServiceStub stub;
+  private final OperationsClient operationsClient;
+
+  /** Constructs an instance of ProductServiceClient with default settings. */
+  public static final ProductServiceClient create() throws IOException {
+    return create(ProductServiceSettings.newBuilder().build());
+  }
+
+  /**
+   * Constructs an instance of ProductServiceClient, using the given settings. The channels are
+   * created based on the settings passed in, or defaults for any settings that are not set.
+   */
+  public static final ProductServiceClient create(ProductServiceSettings settings)
+      throws IOException {
+    return new ProductServiceClient(settings);
+  }
+
+  /**
+   * Constructs an instance of ProductServiceClient, using the given stub for making calls. This is
+   * for advanced usage - prefer using create(ProductServiceSettings).
+   */
+  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
+  public static final ProductServiceClient create(ProductServiceStub stub) {
+    return new ProductServiceClient(stub);
+  }
+
+  /**
+   * Constructs an instance of ProductServiceClient, using the given settings. This is protected so
+   * that it is easy to make a subclass, but otherwise, the static factory methods should be
+   * preferred.
+   */
+  protected ProductServiceClient(ProductServiceSettings settings) throws IOException {
+    this.settings = settings;
+    this.stub = ((ProductServiceStubSettings) settings.getStubSettings()).createStub();
+    this.operationsClient = OperationsClient.create(this.stub.getOperationsStub());
+  }
+
+  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
+  protected ProductServiceClient(ProductServiceStub stub) {
+    this.settings = null;
+    this.stub = stub;
+    this.operationsClient = OperationsClient.create(this.stub.getOperationsStub());
+  }
+
+  public final ProductServiceSettings getSettings() {
+    return settings;
+  }
+
+  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
+  public ProductServiceStub getStub() {
+    return stub;
+  }
+
+  /**
+   * Returns the OperationsClient that can be used to query the status of a long-running operation
+   * returned by another API method call.
+   */
+  public final OperationsClient getOperationsClient() {
+    return operationsClient;
+  }
+
+  // AUTO-GENERATED DOCUMENTATION AND METHOD.
+  /**
+   * Creates a [Product][google.cloud.retail.v2.Product].
+   *
+   * @param parent Required. The parent catalog resource name, such as
+   *     "projects/&#42;/locations/global/catalogs/default_catalog/branches/default_branch".
+   * @param product Required. The [Product][google.cloud.retail.v2.Product] to create.
+   * @param productId Required. The ID to use for the [Product][google.cloud.retail.v2.Product],
+   *     which will become the final component of the
+   *     [Product.name][google.cloud.retail.v2.Product.name].
+   *     <p>If the caller does not have permission to create the
+   *     [Product][google.cloud.retail.v2.Product], regardless of whether or not it exists, a
+   *     PERMISSION_DENIED error is returned.
+   *     <p>This field must be unique among all [Product][google.cloud.retail.v2.Product]s with the
+   *     same [parent][google.cloud.retail.v2.CreateProductRequest.parent]. Otherwise, an
+   *     ALREADY_EXISTS error is returned.
+   *     <p>This field must be a UTF-8 encoded string with a length limit of 128 characters.
+   *     Otherwise, an INVALID_ARGUMENT error is returned.
+   * @throws com.google.api.gax.rpc.ApiException if the remote call fails
+   */
+  public final Product createProduct(BranchName parent, Product product, String productId) {
+    CreateProductRequest request =
+        CreateProductRequest.newBuilder()
+            .setParent(parent == null ? null : parent.toString())
+            .setProduct(product)
+            .setProductId(productId)
+            .build();
+    return createProduct(request);
+  }
+
+  // AUTO-GENERATED DOCUMENTATION AND METHOD.
+  /**
+   * Creates a [Product][google.cloud.retail.v2.Product].
+   *
+   * @param parent Required. The parent catalog resource name, such as
+   *     "projects/&#42;/locations/global/catalogs/default_catalog/branches/default_branch".
+   * @param product Required. The [Product][google.cloud.retail.v2.Product] to create.
+   * @param productId Required. The ID to use for the [Product][google.cloud.retail.v2.Product],
+   *     which will become the final component of the
+   *     [Product.name][google.cloud.retail.v2.Product.name].
+   *     <p>If the caller does not have permission to create the
+   *     [Product][google.cloud.retail.v2.Product], regardless of whether or not it exists, a
+   *     PERMISSION_DENIED error is returned.
+   *     <p>This field must be unique among all [Product][google.cloud.retail.v2.Product]s with the
+   *     same [parent][google.cloud.retail.v2.CreateProductRequest.parent]. Otherwise, an
+   *     ALREADY_EXISTS error is returned.
+   *     <p>This field must be a UTF-8 encoded string with a length limit of 128 characters.
+   *     Otherwise, an INVALID_ARGUMENT error is returned.
+   * @throws com.google.api.gax.rpc.ApiException if the remote call fails
+   */
+  public final Product createProduct(String parent, Product product, String productId) {
+    CreateProductRequest request =
+        CreateProductRequest.newBuilder()
+            .setParent(parent)
+            .setProduct(product)
+            .setProductId(productId)
+            .build();
+    return createProduct(request);
+  }
+
+  // AUTO-GENERATED DOCUMENTATION AND METHOD.
+  /**
+   * Creates a [Product][google.cloud.retail.v2.Product].
+   *
+   * @param request The request object containing all of the parameters for the API call.
+   * @throws com.google.api.gax.rpc.ApiException if the remote call fails
+   */
+  public final Product createProduct(CreateProductRequest request) {
+    return createProductCallable().call(request);
+  }
+
+  // AUTO-GENERATED DOCUMENTATION AND METHOD.
+  /**
+   * Creates a [Product][google.cloud.retail.v2.Product].
+   *
+   * <p>Sample code:
+   */
+  public final UnaryCallable<CreateProductRequest, Product> createProductCallable() {
+    return stub.createProductCallable();
+  }
+
+  // AUTO-GENERATED DOCUMENTATION AND METHOD.
+  /**
+   * Gets a [Product][google.cloud.retail.v2.Product].
+   *
+   * @param name Required. Full resource name of [Product][google.cloud.retail.v2.Product], such as
+   *     "projects/&#42;/locations/global/catalogs/default_catalog/branches/default_branch/products/some_product_id".
+   *     <p>If the caller does not have permission to access the
+   *     [Product][google.cloud.retail.v2.Product], regardless of whether or not it exists, a
+   *     PERMISSION_DENIED error is returned.
+   *     <p>If the requested [Product][google.cloud.retail.v2.Product] does not exist, a NOT_FOUND
+   *     error is returned.
+   * @throws com.google.api.gax.rpc.ApiException if the remote call fails
+   */
+  public final Product getProduct(ProductName name) {
+    GetProductRequest request =
+        GetProductRequest.newBuilder().setName(name == null ? null : name.toString()).build();
+    return getProduct(request);
+  }
+
+  // AUTO-GENERATED DOCUMENTATION AND METHOD.
+  /**
+   * Gets a [Product][google.cloud.retail.v2.Product].
+   *
+   * @param name Required. Full resource name of [Product][google.cloud.retail.v2.Product], such as
+   *     "projects/&#42;/locations/global/catalogs/default_catalog/branches/default_branch/products/some_product_id".
+   *     <p>If the caller does not have permission to access the
+   *     [Product][google.cloud.retail.v2.Product], regardless of whether or not it exists, a
+   *     PERMISSION_DENIED error is returned.
+   *     <p>If the requested [Product][google.cloud.retail.v2.Product] does not exist, a NOT_FOUND
+   *     error is returned.
+   * @throws com.google.api.gax.rpc.ApiException if the remote call fails
+   */
+  public final Product getProduct(String name) {
+    GetProductRequest request = GetProductRequest.newBuilder().setName(name).build();
+    return getProduct(request);
+  }
+
+  // AUTO-GENERATED DOCUMENTATION AND METHOD.
+  /**
+   * Gets a [Product][google.cloud.retail.v2.Product].
+   *
+   * @param request The request object containing all of the parameters for the API call.
+   * @throws com.google.api.gax.rpc.ApiException if the remote call fails
+   */
+  public final Product getProduct(GetProductRequest request) {
+    return getProductCallable().call(request);
+  }
+
+  // AUTO-GENERATED DOCUMENTATION AND METHOD.
+  /**
+   * Gets a [Product][google.cloud.retail.v2.Product].
+   *
+   * <p>Sample code:
+   */
+  public final UnaryCallable<GetProductRequest, Product> getProductCallable() {
+    return stub.getProductCallable();
+  }
+
+  // AUTO-GENERATED DOCUMENTATION AND METHOD.
+  /**
+   * Updates a [Product][google.cloud.retail.v2.Product].
+   *
+   * @param product Required. The product to update/create.
+   *     <p>If the caller does not have permission to update the
+   *     [Product][google.cloud.retail.v2.Product], regardless of whether or not it exists, a
+   *     PERMISSION_DENIED error is returned.
+   *     <p>If the [Product][google.cloud.retail.v2.Product] to update does not exist, a NOT_FOUND
+   *     error is returned.
+   * @param updateMask Indicates which fields in the provided
+   *     [Product][google.cloud.retail.v2.Product] to update. The immutable and output only fields
+   *     are NOT supported. If not set, all supported fields (the fields that are neither immutable
+   *     nor output only) are updated.
+   *     <p>If an unsupported or unknown field is provided, an INVALID_ARGUMENT error is returned.
+   * @throws com.google.api.gax.rpc.ApiException if the remote call fails
+   */
+  public final Product updateProduct(Product product, FieldMask updateMask) {
+    UpdateProductRequest request =
+        UpdateProductRequest.newBuilder().setProduct(product).setUpdateMask(updateMask).build();
+    return updateProduct(request);
+  }
+
+  // AUTO-GENERATED DOCUMENTATION AND METHOD.
+  /**
+   * Updates a [Product][google.cloud.retail.v2.Product].
+   *
+   * @param request The request object containing all of the parameters for the API call.
+   * @throws com.google.api.gax.rpc.ApiException if the remote call fails
+   */
+  public final Product updateProduct(UpdateProductRequest request) {
+    return updateProductCallable().call(request);
+  }
+
+  // AUTO-GENERATED DOCUMENTATION AND METHOD.
+  /**
+   * Updates a [Product][google.cloud.retail.v2.Product].
+   *
+   * <p>Sample code:
+   */
+  public final UnaryCallable<UpdateProductRequest, Product> updateProductCallable() {
+    return stub.updateProductCallable();
+  }
+
+  // AUTO-GENERATED DOCUMENTATION AND METHOD.
+  /**
+   * Deletes a [Product][google.cloud.retail.v2.Product].
+   *
+   * @param name Required. Full resource name of [Product][google.cloud.retail.v2.Product], such as
+   *     "projects/&#42;/locations/global/catalogs/default_catalog/branches/default_branch/products/some_product_id".
+   *     <p>If the caller does not have permission to delete the
+   *     [Product][google.cloud.retail.v2.Product], regardless of whether or not it exists, a
+   *     PERMISSION_DENIED error is returned.
+   *     <p>If the [Product][google.cloud.retail.v2.Product] to delete does not exist, a NOT_FOUND
+   *     error is returned.
+   * @throws com.google.api.gax.rpc.ApiException if the remote call fails
+   */
+  public final void deleteProduct(ProductName name) {
+    DeleteProductRequest request =
+        DeleteProductRequest.newBuilder().setName(name == null ? null : name.toString()).build();
+    deleteProduct(request);
+  }
+
+  // AUTO-GENERATED DOCUMENTATION AND METHOD.
+  /**
+   * Deletes a [Product][google.cloud.retail.v2.Product].
+   *
+   * @param name Required. Full resource name of [Product][google.cloud.retail.v2.Product], such as
+   *     "projects/&#42;/locations/global/catalogs/default_catalog/branches/default_branch/products/some_product_id".
+   *     <p>If the caller does not have permission to delete the
+   *     [Product][google.cloud.retail.v2.Product], regardless of whether or not it exists, a
+   *     PERMISSION_DENIED error is returned.
+   *     <p>If the [Product][google.cloud.retail.v2.Product] to delete does not exist, a NOT_FOUND
+   *     error is returned.
+   * @throws com.google.api.gax.rpc.ApiException if the remote call fails
+   */
+  public final void deleteProduct(String name) {
+    DeleteProductRequest request = DeleteProductRequest.newBuilder().setName(name).build();
+    deleteProduct(request);
+  }
+
+  // AUTO-GENERATED DOCUMENTATION AND METHOD.
+  /**
+   * Deletes a [Product][google.cloud.retail.v2.Product].
+   *
+   * @param request The request object containing all of the parameters for the API call.
+   * @throws com.google.api.gax.rpc.ApiException if the remote call fails
+   */
+  public final void deleteProduct(DeleteProductRequest request) {
+    deleteProductCallable().call(request);
+  }
+
+  // AUTO-GENERATED DOCUMENTATION AND METHOD.
+  /**
+   * Deletes a [Product][google.cloud.retail.v2.Product].
+   *
+   * <p>Sample code:
+   */
+  public final UnaryCallable<DeleteProductRequest, Empty> deleteProductCallable() {
+    return stub.deleteProductCallable();
+  }
+
+  // AUTO-GENERATED DOCUMENTATION AND METHOD.
+  /**
+   * Bulk import of multiple [Product][google.cloud.retail.v2.Product]s.
+   *
+   * <p>Request processing may be synchronous. No partial updating is supported. Non-existing items
+   * are created.
+   *
+   * <p>Note that it is possible for a subset of the [Product][google.cloud.retail.v2.Product]s to
+   * be successfully updated.
+   *
+   * @param request The request object containing all of the parameters for the API call.
+   * @throws com.google.api.gax.rpc.ApiException if the remote call fails
+   */
+  public final OperationFuture<ImportProductsResponse, ImportMetadata> importProductsAsync(
+      ImportProductsRequest request) {
+    return importProductsOperationCallable().futureCall(request);
+  }
+
+  // AUTO-GENERATED DOCUMENTATION AND METHOD.
+  /**
+   * Bulk import of multiple [Product][google.cloud.retail.v2.Product]s.
+   *
+   * <p>Request processing may be synchronous. No partial updating is supported. Non-existing items
+   * are created.
+   *
+   * <p>Note that it is possible for a subset of the [Product][google.cloud.retail.v2.Product]s to
+   * be successfully updated.
+   *
+   * <p>Sample code:
+   */
+  public final OperationCallable<ImportProductsRequest, ImportProductsResponse, ImportMetadata>
+      importProductsOperationCallable() {
+    return stub.importProductsOperationCallable();
+  }
+
+  // AUTO-GENERATED DOCUMENTATION AND METHOD.
+  /**
+   * Bulk import of multiple [Product][google.cloud.retail.v2.Product]s.
+   *
+   * <p>Request processing may be synchronous. No partial updating is supported. Non-existing items
+   * are created.
+   *
+   * <p>Note that it is possible for a subset of the [Product][google.cloud.retail.v2.Product]s to
+   * be successfully updated.
+   *
+   * <p>Sample code:
+   */
+  public final UnaryCallable<ImportProductsRequest, Operation> importProductsCallable() {
+    return stub.importProductsCallable();
+  }
+
+  @Override
+  public final void close() {
+    stub.close();
+  }
+
+  @Override
+  public void shutdown() {
+    stub.shutdown();
+  }
+
+  @Override
+  public boolean isShutdown() {
+    return stub.isShutdown();
+  }
+
+  @Override
+  public boolean isTerminated() {
+    return stub.isTerminated();
+  }
+
+  @Override
+  public void shutdownNow() {
+    stub.shutdownNow();
+  }
+
+  @Override
+  public boolean awaitTermination(long duration, TimeUnit unit) throws InterruptedException {
+    return stub.awaitTermination(duration, unit);
+  }
+}
diff --git a/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/ProductServiceSettings.java b/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/ProductServiceSettings.java
new file mode 100644
index 00000000..d7a8d387
--- /dev/null
+++ b/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/ProductServiceSettings.java
@@ -0,0 +1,238 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.cloud.retail.v2;
+
+import com.google.api.core.ApiFunction;
+import com.google.api.core.BetaApi;
+import com.google.api.gax.core.GoogleCredentialsProvider;
+import com.google.api.gax.core.InstantiatingExecutorProvider;
+import com.google.api.gax.grpc.InstantiatingGrpcChannelProvider;
+import com.google.api.gax.rpc.ApiClientHeaderProvider;
+import com.google.api.gax.rpc.ClientContext;
+import com.google.api.gax.rpc.ClientSettings;
+import com.google.api.gax.rpc.OperationCallSettings;
+import com.google.api.gax.rpc.TransportChannelProvider;
+import com.google.api.gax.rpc.UnaryCallSettings;
+import com.google.cloud.retail.v2.stub.ProductServiceStubSettings;
+import com.google.longrunning.Operation;
+import com.google.protobuf.Empty;
+import java.io.IOException;
+import java.util.List;
+import javax.annotation.Generated;
+
+// AUTO-GENERATED DOCUMENTATION AND CLASS.
+/**
+ * Settings class to configure an instance of {@link ProductServiceClient}.
+ *
+ * <p>The default instance has everything set to sensible defaults:
+ *
+ * <ul>
+ *   <li>The default service address (retail.googleapis.com) and default port (443) are used.
+ *   <li>Credentials are acquired automatically through Application Default Credentials.
+ *   <li>Retries are configured for idempotent methods but not for non-idempotent methods.
+ * </ul>
+ *
+ * <p>The builder of this class is recursive, so contained classes are themselves builders. When
+ * build() is called, the tree of builders is called to create the complete settings object.
+ *
+ * <p>For example, to set the total timeout of createProduct to 30 seconds:
+ *
+ * <pre>{@code
+ * ProductServiceSettings.Builder productServiceSettingsBuilder =
+ *     ProductServiceSettings.newBuilder();
+ * productServiceSettingsBuilder
+ *     .createProductSettings()
+ *     .setRetrySettings(
+ *         productServiceSettingsBuilder
+ *             .createProductSettings()
+ *             .getRetrySettings()
+ *             .toBuilder()
+ *             .setTotalTimeout(Duration.ofSeconds(30))
+ *             .build());
+ * ProductServiceSettings productServiceSettings = productServiceSettingsBuilder.build();
+ * }</pre>
+ */
+@Generated("by gapic-generator-java")
+public class ProductServiceSettings extends ClientSettings<ProductServiceSettings> {
+
+  /** Returns the object with the settings used for calls to createProduct. */
+  public UnaryCallSettings<CreateProductRequest, Product> createProductSettings() {
+    return ((ProductServiceStubSettings) getStubSettings()).createProductSettings();
+  }
+
+  /** Returns the object with the settings used for calls to getProduct. */
+  public UnaryCallSettings<GetProductRequest, Product> getProductSettings() {
+    return ((ProductServiceStubSettings) getStubSettings()).getProductSettings();
+  }
+
+  /** Returns the object with the settings used for calls to updateProduct. */
+  public UnaryCallSettings<UpdateProductRequest, Product> updateProductSettings() {
+    return ((ProductServiceStubSettings) getStubSettings()).updateProductSettings();
+  }
+
+  /** Returns the object with the settings used for calls to deleteProduct. */
+  public UnaryCallSettings<DeleteProductRequest, Empty> deleteProductSettings() {
+    return ((ProductServiceStubSettings) getStubSettings()).deleteProductSettings();
+  }
+
+  /** Returns the object with the settings used for calls to importProducts. */
+  public UnaryCallSettings<ImportProductsRequest, Operation> importProductsSettings() {
+    return ((ProductServiceStubSettings) getStubSettings()).importProductsSettings();
+  }
+
+  /** Returns the object with the settings used for calls to importProducts. */
+  public OperationCallSettings<ImportProductsRequest, ImportProductsResponse, ImportMetadata>
+      importProductsOperationSettings() {
+    return ((ProductServiceStubSettings) getStubSettings()).importProductsOperationSettings();
+  }
+
+  public static final ProductServiceSettings create(ProductServiceStubSettings stub)
+      throws IOException {
+    return new ProductServiceSettings.Builder(stub.toBuilder()).build();
+  }
+
+  /** Returns a builder for the default ExecutorProvider for this service. */
+  public static InstantiatingExecutorProvider.Builder defaultExecutorProviderBuilder() {
+    return ProductServiceStubSettings.defaultExecutorProviderBuilder();
+  }
+
+  /** Returns the default service endpoint. */
+  public static String getDefaultEndpoint() {
+    return ProductServiceStubSettings.getDefaultEndpoint();
+  }
+
+  /** Returns the default service scopes. */
+  public static List<String> getDefaultServiceScopes() {
+    return ProductServiceStubSettings.getDefaultServiceScopes();
+  }
+
+  /** Returns a builder for the default credentials for this service. */
+  public static GoogleCredentialsProvider.Builder defaultCredentialsProviderBuilder() {
+    return ProductServiceStubSettings.defaultCredentialsProviderBuilder();
+  }
+
+  /** Returns a builder for the default ChannelProvider for this service. */
+  public static InstantiatingGrpcChannelProvider.Builder defaultGrpcTransportProviderBuilder() {
+    return ProductServiceStubSettings.defaultGrpcTransportProviderBuilder();
+  }
+
+  public static TransportChannelProvider defaultTransportChannelProvider() {
+    return ProductServiceStubSettings.defaultTransportChannelProvider();
+  }
+
+  @BetaApi("The surface for customizing headers is not stable yet and may change in the future.")
+  public static ApiClientHeaderProvider.Builder defaultApiClientHeaderProviderBuilder() {
+    return ProductServiceStubSettings.defaultApiClientHeaderProviderBuilder();
+  }
+
+  /** Returns a new builder for this class. */
+  public static Builder newBuilder() {
+    return Builder.createDefault();
+  }
+
+  /** Returns a new builder for this class. */
+  public static Builder newBuilder(ClientContext clientContext) {
+    return new Builder(clientContext);
+  }
+
+  /** Returns a builder containing all the values of this settings class. */
+  public Builder toBuilder() {
+    return new Builder(this);
+  }
+
+  protected ProductServiceSettings(Builder settingsBuilder) throws IOException {
+    super(settingsBuilder);
+  }
+
+  /** Builder for ProductServiceSettings. */
+  public static class Builder extends ClientSettings.Builder<ProductServiceSettings, Builder> {
+
+    protected Builder() throws IOException {
+      this(((ClientContext) null));
+    }
+
+    protected Builder(ClientContext clientContext) {
+      super(ProductServiceStubSettings.newBuilder(clientContext));
+    }
+
+    protected Builder(ProductServiceSettings settings) {
+      super(settings.getStubSettings().toBuilder());
+    }
+
+    protected Builder(ProductServiceStubSettings.Builder stubSettings) {
+      super(stubSettings);
+    }
+
+    private static Builder createDefault() {
+      return new Builder(ProductServiceStubSettings.newBuilder());
+    }
+
+    public ProductServiceStubSettings.Builder getStubSettingsBuilder() {
+      return ((ProductServiceStubSettings.Builder) getStubSettings());
+    }
+
+    // NEXT_MAJOR_VER: remove 'throws Exception'.
+    /**
+     * Applies the given settings updater function to all of the unary API methods in this service.
+     *
+     * <p>Note: This method does not support applying settings to streaming methods.
+     */
+    public Builder applyToAllUnaryMethods(
+        ApiFunction<UnaryCallSettings.Builder<?, ?>, Void> settingsUpdater) throws Exception {
+      super.applyToAllUnaryMethods(
+          getStubSettingsBuilder().unaryMethodSettingsBuilders(), settingsUpdater);
+      return this;
+    }
+
+    /** Returns the builder for the settings used for calls to createProduct. */
+    public UnaryCallSettings.Builder<CreateProductRequest, Product> createProductSettings() {
+      return getStubSettingsBuilder().createProductSettings();
+    }
+
+    /** Returns the builder for the settings used for calls to getProduct. */
+    public UnaryCallSettings.Builder<GetProductRequest, Product> getProductSettings() {
+      return getStubSettingsBuilder().getProductSettings();
+    }
+
+    /** Returns the builder for the settings used for calls to updateProduct. */
+    public UnaryCallSettings.Builder<UpdateProductRequest, Product> updateProductSettings() {
+      return getStubSettingsBuilder().updateProductSettings();
+    }
+
+    /** Returns the builder for the settings used for calls to deleteProduct. */
+    public UnaryCallSettings.Builder<DeleteProductRequest, Empty> deleteProductSettings() {
+      return getStubSettingsBuilder().deleteProductSettings();
+    }
+
+    /** Returns the builder for the settings used for calls to importProducts. */
+    public UnaryCallSettings.Builder<ImportProductsRequest, Operation> importProductsSettings() {
+      return getStubSettingsBuilder().importProductsSettings();
+    }
+
+    /** Returns the builder for the settings used for calls to importProducts. */
+    public OperationCallSettings.Builder<
+            ImportProductsRequest, ImportProductsResponse, ImportMetadata>
+        importProductsOperationSettings() {
+      return getStubSettingsBuilder().importProductsOperationSettings();
+    }
+
+    @Override
+    public ProductServiceSettings build() throws IOException {
+      return new ProductServiceSettings(this);
+    }
+  }
+}
diff --git a/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/UserEventServiceClient.java b/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/UserEventServiceClient.java
new file mode 100644
index 00000000..31640f58
--- /dev/null
+++ b/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/UserEventServiceClient.java
@@ -0,0 +1,366 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.cloud.retail.v2;
+
+import com.google.api.HttpBody;
+import com.google.api.core.BetaApi;
+import com.google.api.gax.core.BackgroundResource;
+import com.google.api.gax.longrunning.OperationFuture;
+import com.google.api.gax.rpc.OperationCallable;
+import com.google.api.gax.rpc.UnaryCallable;
+import com.google.cloud.retail.v2.stub.UserEventServiceStub;
+import com.google.cloud.retail.v2.stub.UserEventServiceStubSettings;
+import com.google.longrunning.Operation;
+import com.google.longrunning.OperationsClient;
+import java.io.IOException;
+import java.util.concurrent.TimeUnit;
+import javax.annotation.Generated;
+
+// AUTO-GENERATED DOCUMENTATION AND CLASS.
+/**
+ * Service Description: Service for ingesting end user actions on the customer website.
+ *
+ * <p>This class provides the ability to make remote calls to the backing service through method
+ * calls that map to API methods. Sample code to get started:
+ *
+ * <p>Note: close() needs to be called on the UserEventServiceClient object to clean up resources
+ * such as threads. In the example above, try-with-resources is used, which automatically calls
+ * close().
+ *
+ * <p>The surface of this class includes several types of Java methods for each of the API's
+ * methods:
+ *
+ * <ol>
+ *   <li>A "flattened" method. With this type of method, the fields of the request type have been
+ *       converted into function parameters. It may be the case that not all fields are available as
+ *       parameters, and not every API method will have a flattened method entry point.
+ *   <li>A "request object" method. This type of method only takes one parameter, a request object,
+ *       which must be constructed before the call. Not every API method will have a request object
+ *       method.
+ *   <li>A "callable" method. This type of method takes no parameters and returns an immutable API
+ *       callable object, which can be used to initiate calls to the service.
+ * </ol>
+ *
+ * <p>See the individual methods for example code.
+ *
+ * <p>Many parameters require resource names to be formatted in a particular way. To assist with
+ * these names, this class includes a format method for each type of name, and additionally a parse
+ * method to extract the individual identifiers contained within names that are returned.
+ *
+ * <p>This class can be customized by passing in a custom instance of UserEventServiceSettings to
+ * create(). For example:
+ *
+ * <p>To customize credentials:
+ *
+ * <pre>{@code
+ * UserEventServiceSettings userEventServiceSettings =
+ *     UserEventServiceSettings.newBuilder()
+ *         .setCredentialsProvider(FixedCredentialsProvider.create(myCredentials))
+ *         .build();
+ * UserEventServiceClient userEventServiceClient =
+ *     UserEventServiceClient.create(userEventServiceSettings);
+ * }</pre>
+ *
+ * <p>To customize the endpoint:
+ *
+ * <pre>{@code
+ * UserEventServiceSettings userEventServiceSettings =
+ *     UserEventServiceSettings.newBuilder().setEndpoint(myEndpoint).build();
+ * UserEventServiceClient userEventServiceClient =
+ *     UserEventServiceClient.create(userEventServiceSettings);
+ * }</pre>
+ *
+ * <p>Please refer to the GitHub repository's samples for more quickstart code snippets.
+ */
+@BetaApi
+@Generated("by gapic-generator")
+public class UserEventServiceClient implements BackgroundResource {
+  private final UserEventServiceSettings settings;
+  private final UserEventServiceStub stub;
+  private final OperationsClient operationsClient;
+
+  /** Constructs an instance of UserEventServiceClient with default settings. */
+  public static final UserEventServiceClient create() throws IOException {
+    return create(UserEventServiceSettings.newBuilder().build());
+  }
+
+  /**
+   * Constructs an instance of UserEventServiceClient, using the given settings. The channels are
+   * created based on the settings passed in, or defaults for any settings that are not set.
+   */
+  public static final UserEventServiceClient create(UserEventServiceSettings settings)
+      throws IOException {
+    return new UserEventServiceClient(settings);
+  }
+
+  /**
+   * Constructs an instance of UserEventServiceClient, using the given stub for making calls. This
+   * is for advanced usage - prefer using create(UserEventServiceSettings).
+   */
+  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
+  public static final UserEventServiceClient create(UserEventServiceStub stub) {
+    return new UserEventServiceClient(stub);
+  }
+
+  /**
+   * Constructs an instance of UserEventServiceClient, using the given settings. This is protected
+   * so that it is easy to make a subclass, but otherwise, the static factory methods should be
+   * preferred.
+   */
+  protected UserEventServiceClient(UserEventServiceSettings settings) throws IOException {
+    this.settings = settings;
+    this.stub = ((UserEventServiceStubSettings) settings.getStubSettings()).createStub();
+    this.operationsClient = OperationsClient.create(this.stub.getOperationsStub());
+  }
+
+  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
+  protected UserEventServiceClient(UserEventServiceStub stub) {
+    this.settings = null;
+    this.stub = stub;
+    this.operationsClient = OperationsClient.create(this.stub.getOperationsStub());
+  }
+
+  public final UserEventServiceSettings getSettings() {
+    return settings;
+  }
+
+  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
+  public UserEventServiceStub getStub() {
+    return stub;
+  }
+
+  /**
+   * Returns the OperationsClient that can be used to query the status of a long-running operation
+   * returned by another API method call.
+   */
+  public final OperationsClient getOperationsClient() {
+    return operationsClient;
+  }
+
+  // AUTO-GENERATED DOCUMENTATION AND METHOD.
+  /**
+   * Writes a single user event.
+   *
+   * @param request The request object containing all of the parameters for the API call.
+   * @throws com.google.api.gax.rpc.ApiException if the remote call fails
+   */
+  public final UserEvent writeUserEvent(WriteUserEventRequest request) {
+    return writeUserEventCallable().call(request);
+  }
+
+  // AUTO-GENERATED DOCUMENTATION AND METHOD.
+  /**
+   * Writes a single user event.
+   *
+   * <p>Sample code:
+   */
+  public final UnaryCallable<WriteUserEventRequest, UserEvent> writeUserEventCallable() {
+    return stub.writeUserEventCallable();
+  }
+
+  // AUTO-GENERATED DOCUMENTATION AND METHOD.
+  /**
+   * Writes a single user event from the browser. This uses a GET request to due to browser
+   * restriction of POST-ing to a 3rd party domain.
+   *
+   * <p>This method is used only by the Retail API JavaScript pixel and Google Tag Manager. Users
+   * should not call this method directly.
+   *
+   * @param request The request object containing all of the parameters for the API call.
+   * @throws com.google.api.gax.rpc.ApiException if the remote call fails
+   */
+  public final HttpBody collectUserEvent(CollectUserEventRequest request) {
+    return collectUserEventCallable().call(request);
+  }
+
+  // AUTO-GENERATED DOCUMENTATION AND METHOD.
+  /**
+   * Writes a single user event from the browser. This uses a GET request to due to browser
+   * restriction of POST-ing to a 3rd party domain.
+   *
+   * <p>This method is used only by the Retail API JavaScript pixel and Google Tag Manager. Users
+   * should not call this method directly.
+   *
+   * <p>Sample code:
+   */
+  public final UnaryCallable<CollectUserEventRequest, HttpBody> collectUserEventCallable() {
+    return stub.collectUserEventCallable();
+  }
+
+  // AUTO-GENERATED DOCUMENTATION AND METHOD.
+  /**
+   * Deletes permanently all user events specified by the filter provided. Depending on the number
+   * of events specified by the filter, this operation could take hours or days to complete. To test
+   * a filter, use the list command first.
+   *
+   * @param request The request object containing all of the parameters for the API call.
+   * @throws com.google.api.gax.rpc.ApiException if the remote call fails
+   */
+  public final OperationFuture<PurgeUserEventsResponse, PurgeMetadata> purgeUserEventsAsync(
+      PurgeUserEventsRequest request) {
+    return purgeUserEventsOperationCallable().futureCall(request);
+  }
+
+  // AUTO-GENERATED DOCUMENTATION AND METHOD.
+  /**
+   * Deletes permanently all user events specified by the filter provided. Depending on the number
+   * of events specified by the filter, this operation could take hours or days to complete. To test
+   * a filter, use the list command first.
+   *
+   * <p>Sample code:
+   */
+  public final OperationCallable<PurgeUserEventsRequest, PurgeUserEventsResponse, PurgeMetadata>
+      purgeUserEventsOperationCallable() {
+    return stub.purgeUserEventsOperationCallable();
+  }
+
+  // AUTO-GENERATED DOCUMENTATION AND METHOD.
+  /**
+   * Deletes permanently all user events specified by the filter provided. Depending on the number
+   * of events specified by the filter, this operation could take hours or days to complete. To test
+   * a filter, use the list command first.
+   *
+   * <p>Sample code:
+   */
+  public final UnaryCallable<PurgeUserEventsRequest, Operation> purgeUserEventsCallable() {
+    return stub.purgeUserEventsCallable();
+  }
+
+  // AUTO-GENERATED DOCUMENTATION AND METHOD.
+  /**
+   * Bulk import of User events. Request processing might be synchronous. Events that already exist
+   * are skipped. Use this method for backfilling historical user events.
+   *
+   * <p>Operation.response is of type ImportResponse. Note that it is possible for a subset of the
+   * items to be successfully inserted. Operation.metadata is of type ImportMetadata.
+   *
+   * @param request The request object containing all of the parameters for the API call.
+   * @throws com.google.api.gax.rpc.ApiException if the remote call fails
+   */
+  public final OperationFuture<ImportUserEventsResponse, ImportMetadata> importUserEventsAsync(
+      ImportUserEventsRequest request) {
+    return importUserEventsOperationCallable().futureCall(request);
+  }
+
+  // AUTO-GENERATED DOCUMENTATION AND METHOD.
+  /**
+   * Bulk import of User events. Request processing might be synchronous. Events that already exist
+   * are skipped. Use this method for backfilling historical user events.
+   *
+   * <p>Operation.response is of type ImportResponse. Note that it is possible for a subset of the
+   * items to be successfully inserted. Operation.metadata is of type ImportMetadata.
+   *
+   * <p>Sample code:
+   */
+  public final OperationCallable<ImportUserEventsRequest, ImportUserEventsResponse, ImportMetadata>
+      importUserEventsOperationCallable() {
+    return stub.importUserEventsOperationCallable();
+  }
+
+  // AUTO-GENERATED DOCUMENTATION AND METHOD.
+  /**
+   * Bulk import of User events. Request processing might be synchronous. Events that already exist
+   * are skipped. Use this method for backfilling historical user events.
+   *
+   * <p>Operation.response is of type ImportResponse. Note that it is possible for a subset of the
+   * items to be successfully inserted. Operation.metadata is of type ImportMetadata.
+   *
+   * <p>Sample code:
+   */
+  public final UnaryCallable<ImportUserEventsRequest, Operation> importUserEventsCallable() {
+    return stub.importUserEventsCallable();
+  }
+
+  // AUTO-GENERATED DOCUMENTATION AND METHOD.
+  /**
+   * Triggers a user event rejoin operation with latest product catalog. Events will not be
+   * annotated with detailed product information if product is missing from the catalog at the time
+   * the user event is ingested, and these events are stored as unjoined events with a limited usage
+   * on training and serving. This API can be used to trigger a 'join' operation on specified events
+   * with latest version of product catalog. It can also be used to correct events joined with wrong
+   * product catalog.
+   *
+   * @param request The request object containing all of the parameters for the API call.
+   * @throws com.google.api.gax.rpc.ApiException if the remote call fails
+   */
+  public final OperationFuture<RejoinUserEventsResponse, RejoinUserEventsMetadata>
+      rejoinUserEventsAsync(RejoinUserEventsRequest request) {
+    return rejoinUserEventsOperationCallable().futureCall(request);
+  }
+
+  // AUTO-GENERATED DOCUMENTATION AND METHOD.
+  /**
+   * Triggers a user event rejoin operation with latest product catalog. Events will not be
+   * annotated with detailed product information if product is missing from the catalog at the time
+   * the user event is ingested, and these events are stored as unjoined events with a limited usage
+   * on training and serving. This API can be used to trigger a 'join' operation on specified events
+   * with latest version of product catalog. It can also be used to correct events joined with wrong
+   * product catalog.
+   *
+   * <p>Sample code:
+   */
+  public final OperationCallable<
+          RejoinUserEventsRequest, RejoinUserEventsResponse, RejoinUserEventsMetadata>
+      rejoinUserEventsOperationCallable() {
+    return stub.rejoinUserEventsOperationCallable();
+  }
+
+  // AUTO-GENERATED DOCUMENTATION AND METHOD.
+  /**
+   * Triggers a user event rejoin operation with latest product catalog. Events will not be
+   * annotated with detailed product information if product is missing from the catalog at the time
+   * the user event is ingested, and these events are stored as unjoined events with a limited usage
+   * on training and serving. This API can be used to trigger a 'join' operation on specified events
+   * with latest version of product catalog. It can also be used to correct events joined with wrong
+   * product catalog.
+   *
+   * <p>Sample code:
+   */
+  public final UnaryCallable<RejoinUserEventsRequest, Operation> rejoinUserEventsCallable() {
+    return stub.rejoinUserEventsCallable();
+  }
+
+  @Override
+  public final void close() {
+    stub.close();
+  }
+
+  @Override
+  public void shutdown() {
+    stub.shutdown();
+  }
+
+  @Override
+  public boolean isShutdown() {
+    return stub.isShutdown();
+  }
+
+  @Override
+  public boolean isTerminated() {
+    return stub.isTerminated();
+  }
+
+  @Override
+  public void shutdownNow() {
+    stub.shutdownNow();
+  }
+
+  @Override
+  public boolean awaitTermination(long duration, TimeUnit unit) throws InterruptedException {
+    return stub.awaitTermination(duration, unit);
+  }
+}
diff --git a/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/UserEventServiceSettings.java b/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/UserEventServiceSettings.java
new file mode 100644
index 00000000..0851516a
--- /dev/null
+++ b/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/UserEventServiceSettings.java
@@ -0,0 +1,267 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.cloud.retail.v2;
+
+import com.google.api.HttpBody;
+import com.google.api.core.ApiFunction;
+import com.google.api.core.BetaApi;
+import com.google.api.gax.core.GoogleCredentialsProvider;
+import com.google.api.gax.core.InstantiatingExecutorProvider;
+import com.google.api.gax.grpc.InstantiatingGrpcChannelProvider;
+import com.google.api.gax.rpc.ApiClientHeaderProvider;
+import com.google.api.gax.rpc.ClientContext;
+import com.google.api.gax.rpc.ClientSettings;
+import com.google.api.gax.rpc.OperationCallSettings;
+import com.google.api.gax.rpc.TransportChannelProvider;
+import com.google.api.gax.rpc.UnaryCallSettings;
+import com.google.cloud.retail.v2.stub.UserEventServiceStubSettings;
+import com.google.longrunning.Operation;
+import java.io.IOException;
+import java.util.List;
+import javax.annotation.Generated;
+
+// AUTO-GENERATED DOCUMENTATION AND CLASS.
+/**
+ * Settings class to configure an instance of {@link UserEventServiceClient}.
+ *
+ * <p>The default instance has everything set to sensible defaults:
+ *
+ * <ul>
+ *   <li>The default service address (retail.googleapis.com) and default port (443) are used.
+ *   <li>Credentials are acquired automatically through Application Default Credentials.
+ *   <li>Retries are configured for idempotent methods but not for non-idempotent methods.
+ * </ul>
+ *
+ * <p>The builder of this class is recursive, so contained classes are themselves builders. When
+ * build() is called, the tree of builders is called to create the complete settings object.
+ *
+ * <p>For example, to set the total timeout of writeUserEvent to 30 seconds:
+ *
+ * <pre>{@code
+ * UserEventServiceSettings.Builder userEventServiceSettingsBuilder =
+ *     UserEventServiceSettings.newBuilder();
+ * userEventServiceSettingsBuilder
+ *     .writeUserEventSettings()
+ *     .setRetrySettings(
+ *         userEventServiceSettingsBuilder
+ *             .writeUserEventSettings()
+ *             .getRetrySettings()
+ *             .toBuilder()
+ *             .setTotalTimeout(Duration.ofSeconds(30))
+ *             .build());
+ * UserEventServiceSettings userEventServiceSettings = userEventServiceSettingsBuilder.build();
+ * }</pre>
+ */
+@Generated("by gapic-generator-java")
+public class UserEventServiceSettings extends ClientSettings<UserEventServiceSettings> {
+
+  /** Returns the object with the settings used for calls to writeUserEvent. */
+  public UnaryCallSettings<WriteUserEventRequest, UserEvent> writeUserEventSettings() {
+    return ((UserEventServiceStubSettings) getStubSettings()).writeUserEventSettings();
+  }
+
+  /** Returns the object with the settings used for calls to collectUserEvent. */
+  public UnaryCallSettings<CollectUserEventRequest, HttpBody> collectUserEventSettings() {
+    return ((UserEventServiceStubSettings) getStubSettings()).collectUserEventSettings();
+  }
+
+  /** Returns the object with the settings used for calls to purgeUserEvents. */
+  public UnaryCallSettings<PurgeUserEventsRequest, Operation> purgeUserEventsSettings() {
+    return ((UserEventServiceStubSettings) getStubSettings()).purgeUserEventsSettings();
+  }
+
+  /** Returns the object with the settings used for calls to purgeUserEvents. */
+  public OperationCallSettings<PurgeUserEventsRequest, PurgeUserEventsResponse, PurgeMetadata>
+      purgeUserEventsOperationSettings() {
+    return ((UserEventServiceStubSettings) getStubSettings()).purgeUserEventsOperationSettings();
+  }
+
+  /** Returns the object with the settings used for calls to importUserEvents. */
+  public UnaryCallSettings<ImportUserEventsRequest, Operation> importUserEventsSettings() {
+    return ((UserEventServiceStubSettings) getStubSettings()).importUserEventsSettings();
+  }
+
+  /** Returns the object with the settings used for calls to importUserEvents. */
+  public OperationCallSettings<ImportUserEventsRequest, ImportUserEventsResponse, ImportMetadata>
+      importUserEventsOperationSettings() {
+    return ((UserEventServiceStubSettings) getStubSettings()).importUserEventsOperationSettings();
+  }
+
+  /** Returns the object with the settings used for calls to rejoinUserEvents. */
+  public UnaryCallSettings<RejoinUserEventsRequest, Operation> rejoinUserEventsSettings() {
+    return ((UserEventServiceStubSettings) getStubSettings()).rejoinUserEventsSettings();
+  }
+
+  /** Returns the object with the settings used for calls to rejoinUserEvents. */
+  public OperationCallSettings<
+          RejoinUserEventsRequest, RejoinUserEventsResponse, RejoinUserEventsMetadata>
+      rejoinUserEventsOperationSettings() {
+    return ((UserEventServiceStubSettings) getStubSettings()).rejoinUserEventsOperationSettings();
+  }
+
+  public static final UserEventServiceSettings create(UserEventServiceStubSettings stub)
+      throws IOException {
+    return new UserEventServiceSettings.Builder(stub.toBuilder()).build();
+  }
+
+  /** Returns a builder for the default ExecutorProvider for this service. */
+  public static InstantiatingExecutorProvider.Builder defaultExecutorProviderBuilder() {
+    return UserEventServiceStubSettings.defaultExecutorProviderBuilder();
+  }
+
+  /** Returns the default service endpoint. */
+  public static String getDefaultEndpoint() {
+    return UserEventServiceStubSettings.getDefaultEndpoint();
+  }
+
+  /** Returns the default service scopes. */
+  public static List<String> getDefaultServiceScopes() {
+    return UserEventServiceStubSettings.getDefaultServiceScopes();
+  }
+
+  /** Returns a builder for the default credentials for this service. */
+  public static GoogleCredentialsProvider.Builder defaultCredentialsProviderBuilder() {
+    return UserEventServiceStubSettings.defaultCredentialsProviderBuilder();
+  }
+
+  /** Returns a builder for the default ChannelProvider for this service. */
+  public static InstantiatingGrpcChannelProvider.Builder defaultGrpcTransportProviderBuilder() {
+    return UserEventServiceStubSettings.defaultGrpcTransportProviderBuilder();
+  }
+
+  public static TransportChannelProvider defaultTransportChannelProvider() {
+    return UserEventServiceStubSettings.defaultTransportChannelProvider();
+  }
+
+  @BetaApi("The surface for customizing headers is not stable yet and may change in the future.")
+  public static ApiClientHeaderProvider.Builder defaultApiClientHeaderProviderBuilder() {
+    return UserEventServiceStubSettings.defaultApiClientHeaderProviderBuilder();
+  }
+
+  /** Returns a new builder for this class. */
+  public static Builder newBuilder() {
+    return Builder.createDefault();
+  }
+
+  /** Returns a new builder for this class. */
+  public static Builder newBuilder(ClientContext clientContext) {
+    return new Builder(clientContext);
+  }
+
+  /** Returns a builder containing all the values of this settings class. */
+  public Builder toBuilder() {
+    return new Builder(this);
+  }
+
+  protected UserEventServiceSettings(Builder settingsBuilder) throws IOException {
+    super(settingsBuilder);
+  }
+
+  /** Builder for UserEventServiceSettings. */
+  public static class Builder extends ClientSettings.Builder<UserEventServiceSettings, Builder> {
+
+    protected Builder() throws IOException {
+      this(((ClientContext) null));
+    }
+
+    protected Builder(ClientContext clientContext) {
+      super(UserEventServiceStubSettings.newBuilder(clientContext));
+    }
+
+    protected Builder(UserEventServiceSettings settings) {
+      super(settings.getStubSettings().toBuilder());
+    }
+
+    protected Builder(UserEventServiceStubSettings.Builder stubSettings) {
+      super(stubSettings);
+    }
+
+    private static Builder createDefault() {
+      return new Builder(UserEventServiceStubSettings.newBuilder());
+    }
+
+    public UserEventServiceStubSettings.Builder getStubSettingsBuilder() {
+      return ((UserEventServiceStubSettings.Builder) getStubSettings());
+    }
+
+    // NEXT_MAJOR_VER: remove 'throws Exception'.
+    /**
+     * Applies the given settings updater function to all of the unary API methods in this service.
+     *
+     * <p>Note: This method does not support applying settings to streaming methods.
+     */
+    public Builder applyToAllUnaryMethods(
+        ApiFunction<UnaryCallSettings.Builder<?, ?>, Void> settingsUpdater) throws Exception {
+      super.applyToAllUnaryMethods(
+          getStubSettingsBuilder().unaryMethodSettingsBuilders(), settingsUpdater);
+      return this;
+    }
+
+    /** Returns the builder for the settings used for calls to writeUserEvent. */
+    public UnaryCallSettings.Builder<WriteUserEventRequest, UserEvent> writeUserEventSettings() {
+      return getStubSettingsBuilder().writeUserEventSettings();
+    }
+
+    /** Returns the builder for the settings used for calls to collectUserEvent. */
+    public UnaryCallSettings.Builder<CollectUserEventRequest, HttpBody> collectUserEventSettings() {
+      return getStubSettingsBuilder().collectUserEventSettings();
+    }
+
+    /** Returns the builder for the settings used for calls to purgeUserEvents. */
+    public UnaryCallSettings.Builder<PurgeUserEventsRequest, Operation> purgeUserEventsSettings() {
+      return getStubSettingsBuilder().purgeUserEventsSettings();
+    }
+
+    /** Returns the builder for the settings used for calls to purgeUserEvents. */
+    public OperationCallSettings.Builder<
+            PurgeUserEventsRequest, PurgeUserEventsResponse, PurgeMetadata>
+        purgeUserEventsOperationSettings() {
+      return getStubSettingsBuilder().purgeUserEventsOperationSettings();
+    }
+
+    /** Returns the builder for the settings used for calls to importUserEvents. */
+    public UnaryCallSettings.Builder<ImportUserEventsRequest, Operation>
+        importUserEventsSettings() {
+      return getStubSettingsBuilder().importUserEventsSettings();
+    }
+
+    /** Returns the builder for the settings used for calls to importUserEvents. */
+    public OperationCallSettings.Builder<
+            ImportUserEventsRequest, ImportUserEventsResponse, ImportMetadata>
+        importUserEventsOperationSettings() {
+      return getStubSettingsBuilder().importUserEventsOperationSettings();
+    }
+
+    /** Returns the builder for the settings used for calls to rejoinUserEvents. */
+    public UnaryCallSettings.Builder<RejoinUserEventsRequest, Operation>
+        rejoinUserEventsSettings() {
+      return getStubSettingsBuilder().rejoinUserEventsSettings();
+    }
+
+    /** Returns the builder for the settings used for calls to rejoinUserEvents. */
+    public OperationCallSettings.Builder<
+            RejoinUserEventsRequest, RejoinUserEventsResponse, RejoinUserEventsMetadata>
+        rejoinUserEventsOperationSettings() {
+      return getStubSettingsBuilder().rejoinUserEventsOperationSettings();
+    }
+
+    @Override
+    public UserEventServiceSettings build() throws IOException {
+      return new UserEventServiceSettings(this);
+    }
+  }
+}
diff --git a/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/package-info.java b/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/package-info.java
new file mode 100644
index 00000000..a0001ac1
--- /dev/null
+++ b/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/package-info.java
@@ -0,0 +1,48 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * The interfaces provided are listed below, along with usage samples.
+ *
+ * <p>======================= CatalogServiceClient =======================
+ *
+ * <p>Service Description: Service for managing catalog configuration.
+ *
+ * <p>Sample for CatalogServiceClient:
+ *
+ * <p>======================= PredictionServiceClient =======================
+ *
+ * <p>Service Description: Service for making recommendation prediction.
+ *
+ * <p>Sample for PredictionServiceClient:
+ *
+ * <p>======================= ProductServiceClient =======================
+ *
+ * <p>Service Description: Service for ingesting [Product][google.cloud.retail.v2.Product]
+ * information of the customer's website.
+ *
+ * <p>Sample for ProductServiceClient:
+ *
+ * <p>======================= UserEventServiceClient =======================
+ *
+ * <p>Service Description: Service for ingesting end user actions on the customer website.
+ *
+ * <p>Sample for UserEventServiceClient:
+ */
+@Generated("by gapic-generator-java")
+package com.google.cloud.retail.v2;
+
+import javax.annotation.Generated;
diff --git a/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/stub/CatalogServiceStub.java b/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/stub/CatalogServiceStub.java
new file mode 100644
index 00000000..40b40cde
--- /dev/null
+++ b/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/stub/CatalogServiceStub.java
@@ -0,0 +1,52 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.cloud.retail.v2.stub;
+
+import static com.google.cloud.retail.v2.CatalogServiceClient.ListCatalogsPagedResponse;
+
+import com.google.api.gax.core.BackgroundResource;
+import com.google.api.gax.rpc.UnaryCallable;
+import com.google.cloud.retail.v2.Catalog;
+import com.google.cloud.retail.v2.ListCatalogsRequest;
+import com.google.cloud.retail.v2.ListCatalogsResponse;
+import com.google.cloud.retail.v2.UpdateCatalogRequest;
+import javax.annotation.Generated;
+
+// AUTO-GENERATED DOCUMENTATION AND CLASS.
+/**
+ * Base stub class for the CatalogService service API.
+ *
+ * <p>This class is for advanced usage and reflects the underlying API directly.
+ */
+@Generated("by gapic-generator")
+public abstract class CatalogServiceStub implements BackgroundResource {
+
+  public UnaryCallable<ListCatalogsRequest, ListCatalogsPagedResponse> listCatalogsPagedCallable() {
+    throw new UnsupportedOperationException("Not implemented: listCatalogsPagedCallable()");
+  }
+
+  public UnaryCallable<ListCatalogsRequest, ListCatalogsResponse> listCatalogsCallable() {
+    throw new UnsupportedOperationException("Not implemented: listCatalogsCallable()");
+  }
+
+  public UnaryCallable<UpdateCatalogRequest, Catalog> updateCatalogCallable() {
+    throw new UnsupportedOperationException("Not implemented: updateCatalogCallable()");
+  }
+
+  @Override
+  public abstract void close();
+}
diff --git a/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/stub/CatalogServiceStubSettings.java b/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/stub/CatalogServiceStubSettings.java
new file mode 100644
index 00000000..ccf8608f
--- /dev/null
+++ b/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/stub/CatalogServiceStubSettings.java
@@ -0,0 +1,362 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.cloud.retail.v2.stub;
+
+import static com.google.cloud.retail.v2.CatalogServiceClient.ListCatalogsPagedResponse;
+
+import com.google.api.core.ApiFunction;
+import com.google.api.core.ApiFuture;
+import com.google.api.core.BetaApi;
+import com.google.api.gax.core.GaxProperties;
+import com.google.api.gax.core.GoogleCredentialsProvider;
+import com.google.api.gax.core.InstantiatingExecutorProvider;
+import com.google.api.gax.grpc.GaxGrpcProperties;
+import com.google.api.gax.grpc.GrpcTransportChannel;
+import com.google.api.gax.grpc.InstantiatingGrpcChannelProvider;
+import com.google.api.gax.retrying.RetrySettings;
+import com.google.api.gax.rpc.ApiCallContext;
+import com.google.api.gax.rpc.ApiClientHeaderProvider;
+import com.google.api.gax.rpc.ClientContext;
+import com.google.api.gax.rpc.PageContext;
+import com.google.api.gax.rpc.PagedCallSettings;
+import com.google.api.gax.rpc.PagedListDescriptor;
+import com.google.api.gax.rpc.PagedListResponseFactory;
+import com.google.api.gax.rpc.StatusCode;
+import com.google.api.gax.rpc.StubSettings;
+import com.google.api.gax.rpc.TransportChannelProvider;
+import com.google.api.gax.rpc.UnaryCallSettings;
+import com.google.api.gax.rpc.UnaryCallable;
+import com.google.cloud.retail.v2.Catalog;
+import com.google.cloud.retail.v2.ListCatalogsRequest;
+import com.google.cloud.retail.v2.ListCatalogsResponse;
+import com.google.cloud.retail.v2.UpdateCatalogRequest;
+import com.google.common.collect.ImmutableList;
+import com.google.common.collect.ImmutableMap;
+import com.google.common.collect.ImmutableSet;
+import com.google.common.collect.Lists;
+import java.io.IOException;
+import java.util.List;
+import javax.annotation.Generated;
+import org.threeten.bp.Duration;
+
+// AUTO-GENERATED DOCUMENTATION AND CLASS.
+/**
+ * Settings class to configure an instance of {@link CatalogServiceStub}.
+ *
+ * <p>The default instance has everything set to sensible defaults:
+ *
+ * <ul>
+ *   <li>The default service address (retail.googleapis.com) and default port (443) are used.
+ *   <li>Credentials are acquired automatically through Application Default Credentials.
+ *   <li>Retries are configured for idempotent methods but not for non-idempotent methods.
+ * </ul>
+ *
+ * <p>The builder of this class is recursive, so contained classes are themselves builders. When
+ * build() is called, the tree of builders is called to create the complete settings object.
+ *
+ * <p>For example, to set the total timeout of updateCatalog to 30 seconds:
+ *
+ * <pre>{@code
+ * CatalogServiceStubSettings.Builder catalogServiceSettingsBuilder =
+ *     CatalogServiceStubSettings.newBuilder();
+ * catalogServiceSettingsBuilder
+ *     .updateCatalogSettings()
+ *     .setRetrySettings(
+ *         catalogServiceSettingsBuilder
+ *             .updateCatalogSettings()
+ *             .getRetrySettings()
+ *             .toBuilder()
+ *             .setTotalTimeout(Duration.ofSeconds(30))
+ *             .build());
+ * CatalogServiceStubSettings catalogServiceSettings = catalogServiceSettingsBuilder.build();
+ * }</pre>
+ */
+@BetaApi
+@Generated("by gapic-generator-java")
+public class CatalogServiceStubSettings extends StubSettings<CatalogServiceStubSettings> {
+  /** The default scopes of the service. */
+  private static final ImmutableList<String> DEFAULT_SERVICE_SCOPES =
+      ImmutableList.<String>builder().add("https://www.googleapis.com/auth/cloud-platform").build();
+
+  private final PagedCallSettings<
+          ListCatalogsRequest, ListCatalogsResponse, ListCatalogsPagedResponse>
+      listCatalogsSettings;
+  private final UnaryCallSettings<UpdateCatalogRequest, Catalog> updateCatalogSettings;
+
+  private static final PagedListDescriptor<ListCatalogsRequest, ListCatalogsResponse, Catalog>
+      LIST_CATALOGS_PAGE_STR_DESC =
+          new PagedListDescriptor<ListCatalogsRequest, ListCatalogsResponse, Catalog>() {
+            @Override
+            public String emptyToken() {
+              return "";
+            }
+
+            @Override
+            public ListCatalogsRequest injectToken(ListCatalogsRequest payload, String token) {
+              return ListCatalogsRequest.newBuilder(payload).setPageToken(token).build();
+            }
+
+            @Override
+            public ListCatalogsRequest injectPageSize(ListCatalogsRequest payload, int pageSize) {
+              return ListCatalogsRequest.newBuilder(payload).setPageSize(pageSize).build();
+            }
+
+            @Override
+            public Integer extractPageSize(ListCatalogsRequest payload) {
+              return payload.getPageSize();
+            }
+
+            @Override
+            public String extractNextToken(ListCatalogsResponse payload) {
+              return payload.getNextPageToken();
+            }
+
+            @Override
+            public Iterable<Catalog> extractResources(ListCatalogsResponse payload) {
+              return payload.getCatalogsList() == null
+                  ? ImmutableList.<Catalog>of()
+                  : payload.getCatalogsList();
+            }
+          };
+
+  private static final PagedListResponseFactory<
+          ListCatalogsRequest, ListCatalogsResponse, ListCatalogsPagedResponse>
+      LIST_CATALOGS_PAGE_STR_FACT =
+          new PagedListResponseFactory<
+              ListCatalogsRequest, ListCatalogsResponse, ListCatalogsPagedResponse>() {
+            @Override
+            public ApiFuture<ListCatalogsPagedResponse> getFuturePagedResponse(
+                UnaryCallable<ListCatalogsRequest, ListCatalogsResponse> callable,
+                ListCatalogsRequest request,
+                ApiCallContext context,
+                ApiFuture<ListCatalogsResponse> futureResponse) {
+              PageContext<ListCatalogsRequest, ListCatalogsResponse, Catalog> pageContext =
+                  PageContext.create(callable, LIST_CATALOGS_PAGE_STR_DESC, request, context);
+              return ListCatalogsPagedResponse.createAsync(pageContext, futureResponse);
+            }
+          };
+
+  /** Returns the object with the settings used for calls to listCatalogs. */
+  public PagedCallSettings<ListCatalogsRequest, ListCatalogsResponse, ListCatalogsPagedResponse>
+      listCatalogsSettings() {
+    return listCatalogsSettings;
+  }
+
+  /** Returns the object with the settings used for calls to updateCatalog. */
+  public UnaryCallSettings<UpdateCatalogRequest, Catalog> updateCatalogSettings() {
+    return updateCatalogSettings;
+  }
+
+  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
+  public CatalogServiceStub createStub() throws IOException {
+    if (getTransportChannelProvider()
+        .getTransportName()
+        .equals(GrpcTransportChannel.getGrpcTransportName())) {
+      return GrpcCatalogServiceStub.create(this);
+    }
+    throw new UnsupportedOperationException(
+        String.format(
+            "Transport not supported: %s", getTransportChannelProvider().getTransportName()));
+  }
+
+  /** Returns a builder for the default ExecutorProvider for this service. */
+  public static InstantiatingExecutorProvider.Builder defaultExecutorProviderBuilder() {
+    return InstantiatingExecutorProvider.newBuilder();
+  }
+
+  /** Returns the default service endpoint. */
+  public static String getDefaultEndpoint() {
+    return "retail.googleapis.com:443";
+  }
+
+  /** Returns the default service scopes. */
+  public static List<String> getDefaultServiceScopes() {
+    return DEFAULT_SERVICE_SCOPES;
+  }
+
+  /** Returns a builder for the default credentials for this service. */
+  public static GoogleCredentialsProvider.Builder defaultCredentialsProviderBuilder() {
+    return GoogleCredentialsProvider.newBuilder().setScopesToApply(DEFAULT_SERVICE_SCOPES);
+  }
+
+  /** Returns a builder for the default ChannelProvider for this service. */
+  public static InstantiatingGrpcChannelProvider.Builder defaultGrpcTransportProviderBuilder() {
+    return InstantiatingGrpcChannelProvider.newBuilder()
+        .setMaxInboundMessageSize(Integer.MAX_VALUE);
+  }
+
+  public static TransportChannelProvider defaultTransportChannelProvider() {
+    return defaultGrpcTransportProviderBuilder().build();
+  }
+
+  @BetaApi("The surface for customizing headers is not stable yet and may change in the future.")
+  public static ApiClientHeaderProvider.Builder defaultApiClientHeaderProviderBuilder() {
+    return ApiClientHeaderProvider.newBuilder()
+        .setGeneratedLibToken(
+            "gapic", GaxProperties.getLibraryVersion(CatalogServiceStubSettings.class))
+        .setTransportToken(
+            GaxGrpcProperties.getGrpcTokenName(), GaxGrpcProperties.getGrpcVersion());
+  }
+
+  /** Returns a new builder for this class. */
+  public static Builder newBuilder() {
+    return Builder.createDefault();
+  }
+
+  /** Returns a new builder for this class. */
+  public static Builder newBuilder(ClientContext clientContext) {
+    return new Builder(clientContext);
+  }
+
+  /** Returns a builder containing all the values of this settings class. */
+  public Builder toBuilder() {
+    return new Builder(this);
+  }
+
+  protected CatalogServiceStubSettings(Builder settingsBuilder) throws IOException {
+    super(settingsBuilder);
+
+    listCatalogsSettings = settingsBuilder.listCatalogsSettings().build();
+    updateCatalogSettings = settingsBuilder.updateCatalogSettings().build();
+  }
+
+  /** Builder for CatalogServiceStubSettings. */
+  public static class Builder extends StubSettings.Builder<CatalogServiceStubSettings, Builder> {
+    private final ImmutableList<UnaryCallSettings.Builder<?, ?>> unaryMethodSettingsBuilders;
+    private final PagedCallSettings.Builder<
+            ListCatalogsRequest, ListCatalogsResponse, ListCatalogsPagedResponse>
+        listCatalogsSettings;
+    private final UnaryCallSettings.Builder<UpdateCatalogRequest, Catalog> updateCatalogSettings;
+    private static final ImmutableMap<String, ImmutableSet<StatusCode.Code>>
+        RETRYABLE_CODE_DEFINITIONS;
+
+    static {
+      ImmutableMap.Builder<String, ImmutableSet<StatusCode.Code>> definitions =
+          ImmutableMap.builder();
+      definitions.put(
+          "retry_policy_0_codes",
+          ImmutableSet.copyOf(
+              Lists.<StatusCode.Code>newArrayList(
+                  StatusCode.Code.UNAVAILABLE, StatusCode.Code.DEADLINE_EXCEEDED)));
+      RETRYABLE_CODE_DEFINITIONS = definitions.build();
+    }
+
+    private static final ImmutableMap<String, RetrySettings> RETRY_PARAM_DEFINITIONS;
+
+    static {
+      ImmutableMap.Builder<String, RetrySettings> definitions = ImmutableMap.builder();
+      RetrySettings settings = null;
+      settings =
+          RetrySettings.newBuilder()
+              .setInitialRetryDelay(Duration.ofMillis(100L))
+              .setRetryDelayMultiplier(1.3)
+              .setMaxRetryDelay(Duration.ofMillis(60000L))
+              .setInitialRpcTimeout(Duration.ofMillis(60000L))
+              .setRpcTimeoutMultiplier(1.0)
+              .setMaxRpcTimeout(Duration.ofMillis(60000L))
+              .setTotalTimeout(Duration.ofMillis(60000L))
+              .build();
+      definitions.put("retry_policy_0_params", settings);
+      RETRY_PARAM_DEFINITIONS = definitions.build();
+    }
+
+    protected Builder() {
+      this(((ClientContext) null));
+    }
+
+    protected Builder(ClientContext clientContext) {
+      super(clientContext);
+
+      listCatalogsSettings = PagedCallSettings.newBuilder(LIST_CATALOGS_PAGE_STR_FACT);
+      updateCatalogSettings = UnaryCallSettings.newUnaryCallSettingsBuilder();
+
+      unaryMethodSettingsBuilders =
+          ImmutableList.<UnaryCallSettings.Builder<?, ?>>of(
+              listCatalogsSettings, updateCatalogSettings);
+      initDefaults(this);
+    }
+
+    protected Builder(CatalogServiceStubSettings settings) {
+      super(settings);
+
+      listCatalogsSettings = settings.listCatalogsSettings.toBuilder();
+      updateCatalogSettings = settings.updateCatalogSettings.toBuilder();
+
+      unaryMethodSettingsBuilders =
+          ImmutableList.<UnaryCallSettings.Builder<?, ?>>of(
+              listCatalogsSettings, updateCatalogSettings);
+    }
+
+    private static Builder createDefault() {
+      Builder builder = new Builder(((ClientContext) null));
+
+      builder.setTransportChannelProvider(defaultTransportChannelProvider());
+      builder.setCredentialsProvider(defaultCredentialsProviderBuilder().build());
+      builder.setInternalHeaderProvider(defaultApiClientHeaderProviderBuilder().build());
+      builder.setEndpoint(getDefaultEndpoint());
+
+      return initDefaults(builder);
+    }
+
+    private static Builder initDefaults(Builder builder) {
+      builder
+          .listCatalogsSettings()
+          .setRetryableCodes(RETRYABLE_CODE_DEFINITIONS.get("retry_policy_0_codes"))
+          .setRetrySettings(RETRY_PARAM_DEFINITIONS.get("retry_policy_0_params"));
+
+      builder
+          .updateCatalogSettings()
+          .setRetryableCodes(RETRYABLE_CODE_DEFINITIONS.get("retry_policy_0_codes"))
+          .setRetrySettings(RETRY_PARAM_DEFINITIONS.get("retry_policy_0_params"));
+
+      return builder;
+    }
+
+    // NEXT_MAJOR_VER: remove 'throws Exception'.
+    /**
+     * Applies the given settings updater function to all of the unary API methods in this service.
+     *
+     * <p>Note: This method does not support applying settings to streaming methods.
+     */
+    public Builder applyToAllUnaryMethods(
+        ApiFunction<UnaryCallSettings.Builder<?, ?>, Void> settingsUpdater) throws Exception {
+      super.applyToAllUnaryMethods(unaryMethodSettingsBuilders, settingsUpdater);
+      return this;
+    }
+
+    public ImmutableList<UnaryCallSettings.Builder<?, ?>> unaryMethodSettingsBuilders() {
+      return unaryMethodSettingsBuilders;
+    }
+
+    /** Returns the builder for the settings used for calls to listCatalogs. */
+    public PagedCallSettings.Builder<
+            ListCatalogsRequest, ListCatalogsResponse, ListCatalogsPagedResponse>
+        listCatalogsSettings() {
+      return listCatalogsSettings;
+    }
+
+    /** Returns the builder for the settings used for calls to updateCatalog. */
+    public UnaryCallSettings.Builder<UpdateCatalogRequest, Catalog> updateCatalogSettings() {
+      return updateCatalogSettings;
+    }
+
+    @Override
+    public CatalogServiceStubSettings build() throws IOException {
+      return new CatalogServiceStubSettings(this);
+    }
+  }
+}
diff --git a/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/stub/GrpcCatalogServiceCallableFactory.java b/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/stub/GrpcCatalogServiceCallableFactory.java
new file mode 100644
index 00000000..7a50e14c
--- /dev/null
+++ b/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/stub/GrpcCatalogServiceCallableFactory.java
@@ -0,0 +1,113 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.cloud.retail.v2.stub;
+
+import com.google.api.gax.grpc.GrpcCallSettings;
+import com.google.api.gax.grpc.GrpcCallableFactory;
+import com.google.api.gax.grpc.GrpcStubCallableFactory;
+import com.google.api.gax.rpc.BatchingCallSettings;
+import com.google.api.gax.rpc.BidiStreamingCallable;
+import com.google.api.gax.rpc.ClientContext;
+import com.google.api.gax.rpc.ClientStreamingCallable;
+import com.google.api.gax.rpc.OperationCallSettings;
+import com.google.api.gax.rpc.OperationCallable;
+import com.google.api.gax.rpc.PagedCallSettings;
+import com.google.api.gax.rpc.ServerStreamingCallSettings;
+import com.google.api.gax.rpc.ServerStreamingCallable;
+import com.google.api.gax.rpc.StreamingCallSettings;
+import com.google.api.gax.rpc.UnaryCallSettings;
+import com.google.api.gax.rpc.UnaryCallable;
+import com.google.longrunning.Operation;
+import com.google.longrunning.stub.OperationsStub;
+import javax.annotation.Generated;
+
+// AUTO-GENERATED DOCUMENTATION AND CLASS.
+/**
+ * gRPC callable factory implementation for the CatalogService service API.
+ *
+ * <p>This class is for advanced usage.
+ */
+@Generated("by gapic-generator")
+public class GrpcCatalogServiceCallableFactory implements GrpcStubCallableFactory {
+
+  @Override
+  public <RequestT, ResponseT> UnaryCallable<RequestT, ResponseT> createUnaryCallable(
+      GrpcCallSettings<RequestT, ResponseT> grpcCallSettings,
+      UnaryCallSettings<RequestT, ResponseT> callSettings,
+      ClientContext clientContext) {
+    return GrpcCallableFactory.createUnaryCallable(grpcCallSettings, callSettings, clientContext);
+  }
+
+  @Override
+  public <RequestT, ResponseT, PagedListResponseT>
+      UnaryCallable<RequestT, PagedListResponseT> createPagedCallable(
+          GrpcCallSettings<RequestT, ResponseT> grpcCallSettings,
+          PagedCallSettings<RequestT, ResponseT, PagedListResponseT> callSettings,
+          ClientContext clientContext) {
+    return GrpcCallableFactory.createPagedCallable(grpcCallSettings, callSettings, clientContext);
+  }
+
+  @Override
+  public <RequestT, ResponseT> UnaryCallable<RequestT, ResponseT> createBatchingCallable(
+      GrpcCallSettings<RequestT, ResponseT> grpcCallSettings,
+      BatchingCallSettings<RequestT, ResponseT> callSettings,
+      ClientContext clientContext) {
+    return GrpcCallableFactory.createBatchingCallable(
+        grpcCallSettings, callSettings, clientContext);
+  }
+
+  @Override
+  public <RequestT, ResponseT, MetadataT>
+      OperationCallable<RequestT, ResponseT, MetadataT> createOperationCallable(
+          GrpcCallSettings<RequestT, Operation> grpcCallSettings,
+          OperationCallSettings<RequestT, ResponseT, MetadataT> callSettings,
+          ClientContext clientContext,
+          OperationsStub operationsStub) {
+    return GrpcCallableFactory.createOperationCallable(
+        grpcCallSettings, callSettings, clientContext, operationsStub);
+  }
+
+  @Override
+  public <RequestT, ResponseT>
+      BidiStreamingCallable<RequestT, ResponseT> createBidiStreamingCallable(
+          GrpcCallSettings<RequestT, ResponseT> grpcCallSettings,
+          StreamingCallSettings<RequestT, ResponseT> callSettings,
+          ClientContext clientContext) {
+    return GrpcCallableFactory.createBidiStreamingCallable(
+        grpcCallSettings, callSettings, clientContext);
+  }
+
+  @Override
+  public <RequestT, ResponseT>
+      ServerStreamingCallable<RequestT, ResponseT> createServerStreamingCallable(
+          GrpcCallSettings<RequestT, ResponseT> grpcCallSettings,
+          ServerStreamingCallSettings<RequestT, ResponseT> callSettings,
+          ClientContext clientContext) {
+    return GrpcCallableFactory.createServerStreamingCallable(
+        grpcCallSettings, callSettings, clientContext);
+  }
+
+  @Override
+  public <RequestT, ResponseT>
+      ClientStreamingCallable<RequestT, ResponseT> createClientStreamingCallable(
+          GrpcCallSettings<RequestT, ResponseT> grpcCallSettings,
+          StreamingCallSettings<RequestT, ResponseT> callSettings,
+          ClientContext clientContext) {
+    return GrpcCallableFactory.createClientStreamingCallable(
+        grpcCallSettings, callSettings, clientContext);
+  }
+}
diff --git a/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/stub/GrpcCatalogServiceStub.java b/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/stub/GrpcCatalogServiceStub.java
new file mode 100644
index 00000000..a65f5b8e
--- /dev/null
+++ b/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/stub/GrpcCatalogServiceStub.java
@@ -0,0 +1,204 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.cloud.retail.v2.stub;
+
+import static com.google.cloud.retail.v2.CatalogServiceClient.ListCatalogsPagedResponse;
+
+import com.google.api.gax.core.BackgroundResource;
+import com.google.api.gax.core.BackgroundResourceAggregation;
+import com.google.api.gax.grpc.GrpcCallSettings;
+import com.google.api.gax.grpc.GrpcStubCallableFactory;
+import com.google.api.gax.rpc.ClientContext;
+import com.google.api.gax.rpc.RequestParamsExtractor;
+import com.google.api.gax.rpc.UnaryCallable;
+import com.google.cloud.retail.v2.Catalog;
+import com.google.cloud.retail.v2.ListCatalogsRequest;
+import com.google.cloud.retail.v2.ListCatalogsResponse;
+import com.google.cloud.retail.v2.UpdateCatalogRequest;
+import com.google.common.collect.ImmutableMap;
+import com.google.longrunning.stub.GrpcOperationsStub;
+import io.grpc.MethodDescriptor;
+import io.grpc.protobuf.ProtoUtils;
+import java.io.IOException;
+import java.util.Map;
+import java.util.concurrent.TimeUnit;
+import javax.annotation.Generated;
+
+// AUTO-GENERATED DOCUMENTATION AND CLASS.
+/**
+ * gRPC stub implementation for the CatalogService service API.
+ *
+ * <p>This class is for advanced usage and reflects the underlying API directly.
+ */
+@Generated("by gapic-generator-java")
+public class GrpcCatalogServiceStub extends CatalogServiceStub {
+  private static final MethodDescriptor<ListCatalogsRequest, ListCatalogsResponse>
+      listCatalogsMethodDescriptor =
+          MethodDescriptor.<ListCatalogsRequest, ListCatalogsResponse>newBuilder()
+              .setType(MethodDescriptor.MethodType.UNARY)
+              .setFullMethodName("google.cloud.retail.v2.CatalogService/ListCatalogs")
+              .setRequestMarshaller(ProtoUtils.marshaller(ListCatalogsRequest.getDefaultInstance()))
+              .setResponseMarshaller(
+                  ProtoUtils.marshaller(ListCatalogsResponse.getDefaultInstance()))
+              .build();
+
+  private static final MethodDescriptor<UpdateCatalogRequest, Catalog>
+      updateCatalogMethodDescriptor =
+          MethodDescriptor.<UpdateCatalogRequest, Catalog>newBuilder()
+              .setType(MethodDescriptor.MethodType.UNARY)
+              .setFullMethodName("google.cloud.retail.v2.CatalogService/UpdateCatalog")
+              .setRequestMarshaller(
+                  ProtoUtils.marshaller(UpdateCatalogRequest.getDefaultInstance()))
+              .setResponseMarshaller(ProtoUtils.marshaller(Catalog.getDefaultInstance()))
+              .build();
+
+  private final UnaryCallable<ListCatalogsRequest, ListCatalogsResponse> listCatalogsCallable;
+  private final UnaryCallable<ListCatalogsRequest, ListCatalogsPagedResponse>
+      listCatalogsPagedCallable;
+  private final UnaryCallable<UpdateCatalogRequest, Catalog> updateCatalogCallable;
+
+  private final BackgroundResource backgroundResources;
+  private final GrpcOperationsStub operationsStub;
+  private final GrpcStubCallableFactory callableFactory;
+
+  public static final GrpcCatalogServiceStub create(CatalogServiceStubSettings settings)
+      throws IOException {
+    return new GrpcCatalogServiceStub(settings, ClientContext.create(settings));
+  }
+
+  public static final GrpcCatalogServiceStub create(ClientContext clientContext)
+      throws IOException {
+    return new GrpcCatalogServiceStub(
+        CatalogServiceStubSettings.newBuilder().build(), clientContext);
+  }
+
+  public static final GrpcCatalogServiceStub create(
+      ClientContext clientContext, GrpcStubCallableFactory callableFactory) throws IOException {
+    return new GrpcCatalogServiceStub(
+        CatalogServiceStubSettings.newBuilder().build(), clientContext, callableFactory);
+  }
+
+  /**
+   * Constructs an instance of GrpcCatalogServiceStub, using the given settings. This is protected
+   * so that it is easy to make a subclass, but otherwise, the static factory methods should be
+   * preferred.
+   */
+  protected GrpcCatalogServiceStub(CatalogServiceStubSettings settings, ClientContext clientContext)
+      throws IOException {
+    this(settings, clientContext, new GrpcCatalogServiceCallableFactory());
+  }
+
+  /**
+   * Constructs an instance of GrpcCatalogServiceStub, using the given settings. This is protected
+   * so that it is easy to make a subclass, but otherwise, the static factory methods should be
+   * preferred.
+   */
+  protected GrpcCatalogServiceStub(
+      CatalogServiceStubSettings settings,
+      ClientContext clientContext,
+      GrpcStubCallableFactory callableFactory)
+      throws IOException {
+    this.callableFactory = callableFactory;
+    this.operationsStub = GrpcOperationsStub.create(clientContext, callableFactory);
+
+    GrpcCallSettings<ListCatalogsRequest, ListCatalogsResponse> listCatalogsTransportSettings =
+        GrpcCallSettings.<ListCatalogsRequest, ListCatalogsResponse>newBuilder()
+            .setMethodDescriptor(listCatalogsMethodDescriptor)
+            .setParamsExtractor(
+                new RequestParamsExtractor<ListCatalogsRequest>() {
+                  @Override
+                  public Map<String, String> extract(ListCatalogsRequest request) {
+                    ImmutableMap.Builder<String, String> params = ImmutableMap.builder();
+                    params.put("parent", String.valueOf(request.getParent()));
+                    return params.build();
+                  }
+                })
+            .build();
+    GrpcCallSettings<UpdateCatalogRequest, Catalog> updateCatalogTransportSettings =
+        GrpcCallSettings.<UpdateCatalogRequest, Catalog>newBuilder()
+            .setMethodDescriptor(updateCatalogMethodDescriptor)
+            .setParamsExtractor(
+                new RequestParamsExtractor<UpdateCatalogRequest>() {
+                  @Override
+                  public Map<String, String> extract(UpdateCatalogRequest request) {
+                    ImmutableMap.Builder<String, String> params = ImmutableMap.builder();
+                    params.put("catalog.name", String.valueOf(request.getCatalog().getName()));
+                    return params.build();
+                  }
+                })
+            .build();
+
+    this.listCatalogsCallable =
+        callableFactory.createUnaryCallable(
+            listCatalogsTransportSettings, settings.listCatalogsSettings(), clientContext);
+    this.listCatalogsPagedCallable =
+        callableFactory.createPagedCallable(
+            listCatalogsTransportSettings, settings.listCatalogsSettings(), clientContext);
+    this.updateCatalogCallable =
+        callableFactory.createUnaryCallable(
+            updateCatalogTransportSettings, settings.updateCatalogSettings(), clientContext);
+
+    this.backgroundResources =
+        new BackgroundResourceAggregation(clientContext.getBackgroundResources());
+  }
+
+  public GrpcOperationsStub getOperationsStub() {
+    return operationsStub;
+  }
+
+  public UnaryCallable<ListCatalogsRequest, ListCatalogsResponse> listCatalogsCallable() {
+    return listCatalogsCallable;
+  }
+
+  public UnaryCallable<ListCatalogsRequest, ListCatalogsPagedResponse> listCatalogsPagedCallable() {
+    return listCatalogsPagedCallable;
+  }
+
+  public UnaryCallable<UpdateCatalogRequest, Catalog> updateCatalogCallable() {
+    return updateCatalogCallable;
+  }
+
+  @Override
+  public final void close() {
+    shutdown();
+  }
+
+  @Override
+  public void shutdown() {
+    backgroundResources.shutdown();
+  }
+
+  @Override
+  public boolean isShutdown() {
+    return backgroundResources.isShutdown();
+  }
+
+  @Override
+  public boolean isTerminated() {
+    return backgroundResources.isTerminated();
+  }
+
+  @Override
+  public void shutdownNow() {
+    backgroundResources.shutdownNow();
+  }
+
+  @Override
+  public boolean awaitTermination(long duration, TimeUnit unit) throws InterruptedException {
+    return backgroundResources.awaitTermination(duration, unit);
+  }
+}
diff --git a/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/stub/GrpcPredictionServiceCallableFactory.java b/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/stub/GrpcPredictionServiceCallableFactory.java
new file mode 100644
index 00000000..64bc4b28
--- /dev/null
+++ b/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/stub/GrpcPredictionServiceCallableFactory.java
@@ -0,0 +1,113 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.cloud.retail.v2.stub;
+
+import com.google.api.gax.grpc.GrpcCallSettings;
+import com.google.api.gax.grpc.GrpcCallableFactory;
+import com.google.api.gax.grpc.GrpcStubCallableFactory;
+import com.google.api.gax.rpc.BatchingCallSettings;
+import com.google.api.gax.rpc.BidiStreamingCallable;
+import com.google.api.gax.rpc.ClientContext;
+import com.google.api.gax.rpc.ClientStreamingCallable;
+import com.google.api.gax.rpc.OperationCallSettings;
+import com.google.api.gax.rpc.OperationCallable;
+import com.google.api.gax.rpc.PagedCallSettings;
+import com.google.api.gax.rpc.ServerStreamingCallSettings;
+import com.google.api.gax.rpc.ServerStreamingCallable;
+import com.google.api.gax.rpc.StreamingCallSettings;
+import com.google.api.gax.rpc.UnaryCallSettings;
+import com.google.api.gax.rpc.UnaryCallable;
+import com.google.longrunning.Operation;
+import com.google.longrunning.stub.OperationsStub;
+import javax.annotation.Generated;
+
+// AUTO-GENERATED DOCUMENTATION AND CLASS.
+/**
+ * gRPC callable factory implementation for the PredictionService service API.
+ *
+ * <p>This class is for advanced usage.
+ */
+@Generated("by gapic-generator")
+public class GrpcPredictionServiceCallableFactory implements GrpcStubCallableFactory {
+
+  @Override
+  public <RequestT, ResponseT> UnaryCallable<RequestT, ResponseT> createUnaryCallable(
+      GrpcCallSettings<RequestT, ResponseT> grpcCallSettings,
+      UnaryCallSettings<RequestT, ResponseT> callSettings,
+      ClientContext clientContext) {
+    return GrpcCallableFactory.createUnaryCallable(grpcCallSettings, callSettings, clientContext);
+  }
+
+  @Override
+  public <RequestT, ResponseT, PagedListResponseT>
+      UnaryCallable<RequestT, PagedListResponseT> createPagedCallable(
+          GrpcCallSettings<RequestT, ResponseT> grpcCallSettings,
+          PagedCallSettings<RequestT, ResponseT, PagedListResponseT> callSettings,
+          ClientContext clientContext) {
+    return GrpcCallableFactory.createPagedCallable(grpcCallSettings, callSettings, clientContext);
+  }
+
+  @Override
+  public <RequestT, ResponseT> UnaryCallable<RequestT, ResponseT> createBatchingCallable(
+      GrpcCallSettings<RequestT, ResponseT> grpcCallSettings,
+      BatchingCallSettings<RequestT, ResponseT> callSettings,
+      ClientContext clientContext) {
+    return GrpcCallableFactory.createBatchingCallable(
+        grpcCallSettings, callSettings, clientContext);
+  }
+
+  @Override
+  public <RequestT, ResponseT, MetadataT>
+      OperationCallable<RequestT, ResponseT, MetadataT> createOperationCallable(
+          GrpcCallSettings<RequestT, Operation> grpcCallSettings,
+          OperationCallSettings<RequestT, ResponseT, MetadataT> callSettings,
+          ClientContext clientContext,
+          OperationsStub operationsStub) {
+    return GrpcCallableFactory.createOperationCallable(
+        grpcCallSettings, callSettings, clientContext, operationsStub);
+  }
+
+  @Override
+  public <RequestT, ResponseT>
+      BidiStreamingCallable<RequestT, ResponseT> createBidiStreamingCallable(
+          GrpcCallSettings<RequestT, ResponseT> grpcCallSettings,
+          StreamingCallSettings<RequestT, ResponseT> callSettings,
+          ClientContext clientContext) {
+    return GrpcCallableFactory.createBidiStreamingCallable(
+        grpcCallSettings, callSettings, clientContext);
+  }
+
+  @Override
+  public <RequestT, ResponseT>
+      ServerStreamingCallable<RequestT, ResponseT> createServerStreamingCallable(
+          GrpcCallSettings<RequestT, ResponseT> grpcCallSettings,
+          ServerStreamingCallSettings<RequestT, ResponseT> callSettings,
+          ClientContext clientContext) {
+    return GrpcCallableFactory.createServerStreamingCallable(
+        grpcCallSettings, callSettings, clientContext);
+  }
+
+  @Override
+  public <RequestT, ResponseT>
+      ClientStreamingCallable<RequestT, ResponseT> createClientStreamingCallable(
+          GrpcCallSettings<RequestT, ResponseT> grpcCallSettings,
+          StreamingCallSettings<RequestT, ResponseT> callSettings,
+          ClientContext clientContext) {
+    return GrpcCallableFactory.createClientStreamingCallable(
+        grpcCallSettings, callSettings, clientContext);
+  }
+}
diff --git a/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/stub/GrpcPredictionServiceStub.java b/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/stub/GrpcPredictionServiceStub.java
new file mode 100644
index 00000000..2151fcde
--- /dev/null
+++ b/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/stub/GrpcPredictionServiceStub.java
@@ -0,0 +1,158 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.cloud.retail.v2.stub;
+
+import com.google.api.gax.core.BackgroundResource;
+import com.google.api.gax.core.BackgroundResourceAggregation;
+import com.google.api.gax.grpc.GrpcCallSettings;
+import com.google.api.gax.grpc.GrpcStubCallableFactory;
+import com.google.api.gax.rpc.ClientContext;
+import com.google.api.gax.rpc.RequestParamsExtractor;
+import com.google.api.gax.rpc.UnaryCallable;
+import com.google.cloud.retail.v2.PredictRequest;
+import com.google.cloud.retail.v2.PredictResponse;
+import com.google.common.collect.ImmutableMap;
+import com.google.longrunning.stub.GrpcOperationsStub;
+import io.grpc.MethodDescriptor;
+import io.grpc.protobuf.ProtoUtils;
+import java.io.IOException;
+import java.util.Map;
+import java.util.concurrent.TimeUnit;
+import javax.annotation.Generated;
+
+// AUTO-GENERATED DOCUMENTATION AND CLASS.
+/**
+ * gRPC stub implementation for the PredictionService service API.
+ *
+ * <p>This class is for advanced usage and reflects the underlying API directly.
+ */
+@Generated("by gapic-generator-java")
+public class GrpcPredictionServiceStub extends PredictionServiceStub {
+  private static final MethodDescriptor<PredictRequest, PredictResponse> predictMethodDescriptor =
+      MethodDescriptor.<PredictRequest, PredictResponse>newBuilder()
+          .setType(MethodDescriptor.MethodType.UNARY)
+          .setFullMethodName("google.cloud.retail.v2.PredictionService/Predict")
+          .setRequestMarshaller(ProtoUtils.marshaller(PredictRequest.getDefaultInstance()))
+          .setResponseMarshaller(ProtoUtils.marshaller(PredictResponse.getDefaultInstance()))
+          .build();
+
+  private final UnaryCallable<PredictRequest, PredictResponse> predictCallable;
+
+  private final BackgroundResource backgroundResources;
+  private final GrpcOperationsStub operationsStub;
+  private final GrpcStubCallableFactory callableFactory;
+
+  public static final GrpcPredictionServiceStub create(PredictionServiceStubSettings settings)
+      throws IOException {
+    return new GrpcPredictionServiceStub(settings, ClientContext.create(settings));
+  }
+
+  public static final GrpcPredictionServiceStub create(ClientContext clientContext)
+      throws IOException {
+    return new GrpcPredictionServiceStub(
+        PredictionServiceStubSettings.newBuilder().build(), clientContext);
+  }
+
+  public static final GrpcPredictionServiceStub create(
+      ClientContext clientContext, GrpcStubCallableFactory callableFactory) throws IOException {
+    return new GrpcPredictionServiceStub(
+        PredictionServiceStubSettings.newBuilder().build(), clientContext, callableFactory);
+  }
+
+  /**
+   * Constructs an instance of GrpcPredictionServiceStub, using the given settings. This is
+   * protected so that it is easy to make a subclass, but otherwise, the static factory methods
+   * should be preferred.
+   */
+  protected GrpcPredictionServiceStub(
+      PredictionServiceStubSettings settings, ClientContext clientContext) throws IOException {
+    this(settings, clientContext, new GrpcPredictionServiceCallableFactory());
+  }
+
+  /**
+   * Constructs an instance of GrpcPredictionServiceStub, using the given settings. This is
+   * protected so that it is easy to make a subclass, but otherwise, the static factory methods
+   * should be preferred.
+   */
+  protected GrpcPredictionServiceStub(
+      PredictionServiceStubSettings settings,
+      ClientContext clientContext,
+      GrpcStubCallableFactory callableFactory)
+      throws IOException {
+    this.callableFactory = callableFactory;
+    this.operationsStub = GrpcOperationsStub.create(clientContext, callableFactory);
+
+    GrpcCallSettings<PredictRequest, PredictResponse> predictTransportSettings =
+        GrpcCallSettings.<PredictRequest, PredictResponse>newBuilder()
+            .setMethodDescriptor(predictMethodDescriptor)
+            .setParamsExtractor(
+                new RequestParamsExtractor<PredictRequest>() {
+                  @Override
+                  public Map<String, String> extract(PredictRequest request) {
+                    ImmutableMap.Builder<String, String> params = ImmutableMap.builder();
+                    params.put("placement", String.valueOf(request.getPlacement()));
+                    return params.build();
+                  }
+                })
+            .build();
+
+    this.predictCallable =
+        callableFactory.createUnaryCallable(
+            predictTransportSettings, settings.predictSettings(), clientContext);
+
+    this.backgroundResources =
+        new BackgroundResourceAggregation(clientContext.getBackgroundResources());
+  }
+
+  public GrpcOperationsStub getOperationsStub() {
+    return operationsStub;
+  }
+
+  public UnaryCallable<PredictRequest, PredictResponse> predictCallable() {
+    return predictCallable;
+  }
+
+  @Override
+  public final void close() {
+    shutdown();
+  }
+
+  @Override
+  public void shutdown() {
+    backgroundResources.shutdown();
+  }
+
+  @Override
+  public boolean isShutdown() {
+    return backgroundResources.isShutdown();
+  }
+
+  @Override
+  public boolean isTerminated() {
+    return backgroundResources.isTerminated();
+  }
+
+  @Override
+  public void shutdownNow() {
+    backgroundResources.shutdownNow();
+  }
+
+  @Override
+  public boolean awaitTermination(long duration, TimeUnit unit) throws InterruptedException {
+    return backgroundResources.awaitTermination(duration, unit);
+  }
+}
diff --git a/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/stub/GrpcProductServiceCallableFactory.java b/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/stub/GrpcProductServiceCallableFactory.java
new file mode 100644
index 00000000..f038a6b9
--- /dev/null
+++ b/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/stub/GrpcProductServiceCallableFactory.java
@@ -0,0 +1,113 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.cloud.retail.v2.stub;
+
+import com.google.api.gax.grpc.GrpcCallSettings;
+import com.google.api.gax.grpc.GrpcCallableFactory;
+import com.google.api.gax.grpc.GrpcStubCallableFactory;
+import com.google.api.gax.rpc.BatchingCallSettings;
+import com.google.api.gax.rpc.BidiStreamingCallable;
+import com.google.api.gax.rpc.ClientContext;
+import com.google.api.gax.rpc.ClientStreamingCallable;
+import com.google.api.gax.rpc.OperationCallSettings;
+import com.google.api.gax.rpc.OperationCallable;
+import com.google.api.gax.rpc.PagedCallSettings;
+import com.google.api.gax.rpc.ServerStreamingCallSettings;
+import com.google.api.gax.rpc.ServerStreamingCallable;
+import com.google.api.gax.rpc.StreamingCallSettings;
+import com.google.api.gax.rpc.UnaryCallSettings;
+import com.google.api.gax.rpc.UnaryCallable;
+import com.google.longrunning.Operation;
+import com.google.longrunning.stub.OperationsStub;
+import javax.annotation.Generated;
+
+// AUTO-GENERATED DOCUMENTATION AND CLASS.
+/**
+ * gRPC callable factory implementation for the ProductService service API.
+ *
+ * <p>This class is for advanced usage.
+ */
+@Generated("by gapic-generator")
+public class GrpcProductServiceCallableFactory implements GrpcStubCallableFactory {
+
+  @Override
+  public <RequestT, ResponseT> UnaryCallable<RequestT, ResponseT> createUnaryCallable(
+      GrpcCallSettings<RequestT, ResponseT> grpcCallSettings,
+      UnaryCallSettings<RequestT, ResponseT> callSettings,
+      ClientContext clientContext) {
+    return GrpcCallableFactory.createUnaryCallable(grpcCallSettings, callSettings, clientContext);
+  }
+
+  @Override
+  public <RequestT, ResponseT, PagedListResponseT>
+      UnaryCallable<RequestT, PagedListResponseT> createPagedCallable(
+          GrpcCallSettings<RequestT, ResponseT> grpcCallSettings,
+          PagedCallSettings<RequestT, ResponseT, PagedListResponseT> callSettings,
+          ClientContext clientContext) {
+    return GrpcCallableFactory.createPagedCallable(grpcCallSettings, callSettings, clientContext);
+  }
+
+  @Override
+  public <RequestT, ResponseT> UnaryCallable<RequestT, ResponseT> createBatchingCallable(
+      GrpcCallSettings<RequestT, ResponseT> grpcCallSettings,
+      BatchingCallSettings<RequestT, ResponseT> callSettings,
+      ClientContext clientContext) {
+    return GrpcCallableFactory.createBatchingCallable(
+        grpcCallSettings, callSettings, clientContext);
+  }
+
+  @Override
+  public <RequestT, ResponseT, MetadataT>
+      OperationCallable<RequestT, ResponseT, MetadataT> createOperationCallable(
+          GrpcCallSettings<RequestT, Operation> grpcCallSettings,
+          OperationCallSettings<RequestT, ResponseT, MetadataT> callSettings,
+          ClientContext clientContext,
+          OperationsStub operationsStub) {
+    return GrpcCallableFactory.createOperationCallable(
+        grpcCallSettings, callSettings, clientContext, operationsStub);
+  }
+
+  @Override
+  public <RequestT, ResponseT>
+      BidiStreamingCallable<RequestT, ResponseT> createBidiStreamingCallable(
+          GrpcCallSettings<RequestT, ResponseT> grpcCallSettings,
+          StreamingCallSettings<RequestT, ResponseT> callSettings,
+          ClientContext clientContext) {
+    return GrpcCallableFactory.createBidiStreamingCallable(
+        grpcCallSettings, callSettings, clientContext);
+  }
+
+  @Override
+  public <RequestT, ResponseT>
+      ServerStreamingCallable<RequestT, ResponseT> createServerStreamingCallable(
+          GrpcCallSettings<RequestT, ResponseT> grpcCallSettings,
+          ServerStreamingCallSettings<RequestT, ResponseT> callSettings,
+          ClientContext clientContext) {
+    return GrpcCallableFactory.createServerStreamingCallable(
+        grpcCallSettings, callSettings, clientContext);
+  }
+
+  @Override
+  public <RequestT, ResponseT>
+      ClientStreamingCallable<RequestT, ResponseT> createClientStreamingCallable(
+          GrpcCallSettings<RequestT, ResponseT> grpcCallSettings,
+          StreamingCallSettings<RequestT, ResponseT> callSettings,
+          ClientContext clientContext) {
+    return GrpcCallableFactory.createClientStreamingCallable(
+        grpcCallSettings, callSettings, clientContext);
+  }
+}
diff --git a/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/stub/GrpcProductServiceStub.java b/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/stub/GrpcProductServiceStub.java
new file mode 100644
index 00000000..e69b561c
--- /dev/null
+++ b/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/stub/GrpcProductServiceStub.java
@@ -0,0 +1,302 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.cloud.retail.v2.stub;
+
+import com.google.api.gax.core.BackgroundResource;
+import com.google.api.gax.core.BackgroundResourceAggregation;
+import com.google.api.gax.grpc.GrpcCallSettings;
+import com.google.api.gax.grpc.GrpcStubCallableFactory;
+import com.google.api.gax.rpc.ClientContext;
+import com.google.api.gax.rpc.OperationCallable;
+import com.google.api.gax.rpc.RequestParamsExtractor;
+import com.google.api.gax.rpc.UnaryCallable;
+import com.google.cloud.retail.v2.CreateProductRequest;
+import com.google.cloud.retail.v2.DeleteProductRequest;
+import com.google.cloud.retail.v2.GetProductRequest;
+import com.google.cloud.retail.v2.ImportMetadata;
+import com.google.cloud.retail.v2.ImportProductsRequest;
+import com.google.cloud.retail.v2.ImportProductsResponse;
+import com.google.cloud.retail.v2.Product;
+import com.google.cloud.retail.v2.UpdateProductRequest;
+import com.google.common.collect.ImmutableMap;
+import com.google.longrunning.Operation;
+import com.google.longrunning.stub.GrpcOperationsStub;
+import com.google.protobuf.Empty;
+import io.grpc.MethodDescriptor;
+import io.grpc.protobuf.ProtoUtils;
+import java.io.IOException;
+import java.util.Map;
+import java.util.concurrent.TimeUnit;
+import javax.annotation.Generated;
+
+// AUTO-GENERATED DOCUMENTATION AND CLASS.
+/**
+ * gRPC stub implementation for the ProductService service API.
+ *
+ * <p>This class is for advanced usage and reflects the underlying API directly.
+ */
+@Generated("by gapic-generator-java")
+public class GrpcProductServiceStub extends ProductServiceStub {
+  private static final MethodDescriptor<CreateProductRequest, Product>
+      createProductMethodDescriptor =
+          MethodDescriptor.<CreateProductRequest, Product>newBuilder()
+              .setType(MethodDescriptor.MethodType.UNARY)
+              .setFullMethodName("google.cloud.retail.v2.ProductService/CreateProduct")
+              .setRequestMarshaller(
+                  ProtoUtils.marshaller(CreateProductRequest.getDefaultInstance()))
+              .setResponseMarshaller(ProtoUtils.marshaller(Product.getDefaultInstance()))
+              .build();
+
+  private static final MethodDescriptor<GetProductRequest, Product> getProductMethodDescriptor =
+      MethodDescriptor.<GetProductRequest, Product>newBuilder()
+          .setType(MethodDescriptor.MethodType.UNARY)
+          .setFullMethodName("google.cloud.retail.v2.ProductService/GetProduct")
+          .setRequestMarshaller(ProtoUtils.marshaller(GetProductRequest.getDefaultInstance()))
+          .setResponseMarshaller(ProtoUtils.marshaller(Product.getDefaultInstance()))
+          .build();
+
+  private static final MethodDescriptor<UpdateProductRequest, Product>
+      updateProductMethodDescriptor =
+          MethodDescriptor.<UpdateProductRequest, Product>newBuilder()
+              .setType(MethodDescriptor.MethodType.UNARY)
+              .setFullMethodName("google.cloud.retail.v2.ProductService/UpdateProduct")
+              .setRequestMarshaller(
+                  ProtoUtils.marshaller(UpdateProductRequest.getDefaultInstance()))
+              .setResponseMarshaller(ProtoUtils.marshaller(Product.getDefaultInstance()))
+              .build();
+
+  private static final MethodDescriptor<DeleteProductRequest, Empty> deleteProductMethodDescriptor =
+      MethodDescriptor.<DeleteProductRequest, Empty>newBuilder()
+          .setType(MethodDescriptor.MethodType.UNARY)
+          .setFullMethodName("google.cloud.retail.v2.ProductService/DeleteProduct")
+          .setRequestMarshaller(ProtoUtils.marshaller(DeleteProductRequest.getDefaultInstance()))
+          .setResponseMarshaller(ProtoUtils.marshaller(Empty.getDefaultInstance()))
+          .build();
+
+  private static final MethodDescriptor<ImportProductsRequest, Operation>
+      importProductsMethodDescriptor =
+          MethodDescriptor.<ImportProductsRequest, Operation>newBuilder()
+              .setType(MethodDescriptor.MethodType.UNARY)
+              .setFullMethodName("google.cloud.retail.v2.ProductService/ImportProducts")
+              .setRequestMarshaller(
+                  ProtoUtils.marshaller(ImportProductsRequest.getDefaultInstance()))
+              .setResponseMarshaller(ProtoUtils.marshaller(Operation.getDefaultInstance()))
+              .build();
+
+  private final UnaryCallable<CreateProductRequest, Product> createProductCallable;
+  private final UnaryCallable<GetProductRequest, Product> getProductCallable;
+  private final UnaryCallable<UpdateProductRequest, Product> updateProductCallable;
+  private final UnaryCallable<DeleteProductRequest, Empty> deleteProductCallable;
+  private final UnaryCallable<ImportProductsRequest, Operation> importProductsCallable;
+  private final OperationCallable<ImportProductsRequest, ImportProductsResponse, ImportMetadata>
+      importProductsOperationCallable;
+
+  private final BackgroundResource backgroundResources;
+  private final GrpcOperationsStub operationsStub;
+  private final GrpcStubCallableFactory callableFactory;
+
+  public static final GrpcProductServiceStub create(ProductServiceStubSettings settings)
+      throws IOException {
+    return new GrpcProductServiceStub(settings, ClientContext.create(settings));
+  }
+
+  public static final GrpcProductServiceStub create(ClientContext clientContext)
+      throws IOException {
+    return new GrpcProductServiceStub(
+        ProductServiceStubSettings.newBuilder().build(), clientContext);
+  }
+
+  public static final GrpcProductServiceStub create(
+      ClientContext clientContext, GrpcStubCallableFactory callableFactory) throws IOException {
+    return new GrpcProductServiceStub(
+        ProductServiceStubSettings.newBuilder().build(), clientContext, callableFactory);
+  }
+
+  /**
+   * Constructs an instance of GrpcProductServiceStub, using the given settings. This is protected
+   * so that it is easy to make a subclass, but otherwise, the static factory methods should be
+   * preferred.
+   */
+  protected GrpcProductServiceStub(ProductServiceStubSettings settings, ClientContext clientContext)
+      throws IOException {
+    this(settings, clientContext, new GrpcProductServiceCallableFactory());
+  }
+
+  /**
+   * Constructs an instance of GrpcProductServiceStub, using the given settings. This is protected
+   * so that it is easy to make a subclass, but otherwise, the static factory methods should be
+   * preferred.
+   */
+  protected GrpcProductServiceStub(
+      ProductServiceStubSettings settings,
+      ClientContext clientContext,
+      GrpcStubCallableFactory callableFactory)
+      throws IOException {
+    this.callableFactory = callableFactory;
+    this.operationsStub = GrpcOperationsStub.create(clientContext, callableFactory);
+
+    GrpcCallSettings<CreateProductRequest, Product> createProductTransportSettings =
+        GrpcCallSettings.<CreateProductRequest, Product>newBuilder()
+            .setMethodDescriptor(createProductMethodDescriptor)
+            .setParamsExtractor(
+                new RequestParamsExtractor<CreateProductRequest>() {
+                  @Override
+                  public Map<String, String> extract(CreateProductRequest request) {
+                    ImmutableMap.Builder<String, String> params = ImmutableMap.builder();
+                    params.put("parent", String.valueOf(request.getParent()));
+                    return params.build();
+                  }
+                })
+            .build();
+    GrpcCallSettings<GetProductRequest, Product> getProductTransportSettings =
+        GrpcCallSettings.<GetProductRequest, Product>newBuilder()
+            .setMethodDescriptor(getProductMethodDescriptor)
+            .setParamsExtractor(
+                new RequestParamsExtractor<GetProductRequest>() {
+                  @Override
+                  public Map<String, String> extract(GetProductRequest request) {
+                    ImmutableMap.Builder<String, String> params = ImmutableMap.builder();
+                    params.put("name", String.valueOf(request.getName()));
+                    return params.build();
+                  }
+                })
+            .build();
+    GrpcCallSettings<UpdateProductRequest, Product> updateProductTransportSettings =
+        GrpcCallSettings.<UpdateProductRequest, Product>newBuilder()
+            .setMethodDescriptor(updateProductMethodDescriptor)
+            .setParamsExtractor(
+                new RequestParamsExtractor<UpdateProductRequest>() {
+                  @Override
+                  public Map<String, String> extract(UpdateProductRequest request) {
+                    ImmutableMap.Builder<String, String> params = ImmutableMap.builder();
+                    params.put("product.name", String.valueOf(request.getProduct().getName()));
+                    return params.build();
+                  }
+                })
+            .build();
+    GrpcCallSettings<DeleteProductRequest, Empty> deleteProductTransportSettings =
+        GrpcCallSettings.<DeleteProductRequest, Empty>newBuilder()
+            .setMethodDescriptor(deleteProductMethodDescriptor)
+            .setParamsExtractor(
+                new RequestParamsExtractor<DeleteProductRequest>() {
+                  @Override
+                  public Map<String, String> extract(DeleteProductRequest request) {
+                    ImmutableMap.Builder<String, String> params = ImmutableMap.builder();
+                    params.put("name", String.valueOf(request.getName()));
+                    return params.build();
+                  }
+                })
+            .build();
+    GrpcCallSettings<ImportProductsRequest, Operation> importProductsTransportSettings =
+        GrpcCallSettings.<ImportProductsRequest, Operation>newBuilder()
+            .setMethodDescriptor(importProductsMethodDescriptor)
+            .setParamsExtractor(
+                new RequestParamsExtractor<ImportProductsRequest>() {
+                  @Override
+                  public Map<String, String> extract(ImportProductsRequest request) {
+                    ImmutableMap.Builder<String, String> params = ImmutableMap.builder();
+                    params.put("parent", String.valueOf(request.getParent()));
+                    return params.build();
+                  }
+                })
+            .build();
+
+    this.createProductCallable =
+        callableFactory.createUnaryCallable(
+            createProductTransportSettings, settings.createProductSettings(), clientContext);
+    this.getProductCallable =
+        callableFactory.createUnaryCallable(
+            getProductTransportSettings, settings.getProductSettings(), clientContext);
+    this.updateProductCallable =
+        callableFactory.createUnaryCallable(
+            updateProductTransportSettings, settings.updateProductSettings(), clientContext);
+    this.deleteProductCallable =
+        callableFactory.createUnaryCallable(
+            deleteProductTransportSettings, settings.deleteProductSettings(), clientContext);
+    this.importProductsCallable =
+        callableFactory.createUnaryCallable(
+            importProductsTransportSettings, settings.importProductsSettings(), clientContext);
+    this.importProductsOperationCallable =
+        callableFactory.createOperationCallable(
+            importProductsTransportSettings,
+            settings.importProductsOperationSettings(),
+            clientContext,
+            operationsStub);
+
+    this.backgroundResources =
+        new BackgroundResourceAggregation(clientContext.getBackgroundResources());
+  }
+
+  public GrpcOperationsStub getOperationsStub() {
+    return operationsStub;
+  }
+
+  public UnaryCallable<CreateProductRequest, Product> createProductCallable() {
+    return createProductCallable;
+  }
+
+  public UnaryCallable<GetProductRequest, Product> getProductCallable() {
+    return getProductCallable;
+  }
+
+  public UnaryCallable<UpdateProductRequest, Product> updateProductCallable() {
+    return updateProductCallable;
+  }
+
+  public UnaryCallable<DeleteProductRequest, Empty> deleteProductCallable() {
+    return deleteProductCallable;
+  }
+
+  public UnaryCallable<ImportProductsRequest, Operation> importProductsCallable() {
+    return importProductsCallable;
+  }
+
+  public OperationCallable<ImportProductsRequest, ImportProductsResponse, ImportMetadata>
+      importProductsOperationCallable() {
+    return importProductsOperationCallable;
+  }
+
+  @Override
+  public final void close() {
+    shutdown();
+  }
+
+  @Override
+  public void shutdown() {
+    backgroundResources.shutdown();
+  }
+
+  @Override
+  public boolean isShutdown() {
+    return backgroundResources.isShutdown();
+  }
+
+  @Override
+  public boolean isTerminated() {
+    return backgroundResources.isTerminated();
+  }
+
+  @Override
+  public void shutdownNow() {
+    backgroundResources.shutdownNow();
+  }
+
+  @Override
+  public boolean awaitTermination(long duration, TimeUnit unit) throws InterruptedException {
+    return backgroundResources.awaitTermination(duration, unit);
+  }
+}
diff --git a/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/stub/GrpcUserEventServiceCallableFactory.java b/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/stub/GrpcUserEventServiceCallableFactory.java
new file mode 100644
index 00000000..26349af1
--- /dev/null
+++ b/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/stub/GrpcUserEventServiceCallableFactory.java
@@ -0,0 +1,113 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.cloud.retail.v2.stub;
+
+import com.google.api.gax.grpc.GrpcCallSettings;
+import com.google.api.gax.grpc.GrpcCallableFactory;
+import com.google.api.gax.grpc.GrpcStubCallableFactory;
+import com.google.api.gax.rpc.BatchingCallSettings;
+import com.google.api.gax.rpc.BidiStreamingCallable;
+import com.google.api.gax.rpc.ClientContext;
+import com.google.api.gax.rpc.ClientStreamingCallable;
+import com.google.api.gax.rpc.OperationCallSettings;
+import com.google.api.gax.rpc.OperationCallable;
+import com.google.api.gax.rpc.PagedCallSettings;
+import com.google.api.gax.rpc.ServerStreamingCallSettings;
+import com.google.api.gax.rpc.ServerStreamingCallable;
+import com.google.api.gax.rpc.StreamingCallSettings;
+import com.google.api.gax.rpc.UnaryCallSettings;
+import com.google.api.gax.rpc.UnaryCallable;
+import com.google.longrunning.Operation;
+import com.google.longrunning.stub.OperationsStub;
+import javax.annotation.Generated;
+
+// AUTO-GENERATED DOCUMENTATION AND CLASS.
+/**
+ * gRPC callable factory implementation for the UserEventService service API.
+ *
+ * <p>This class is for advanced usage.
+ */
+@Generated("by gapic-generator")
+public class GrpcUserEventServiceCallableFactory implements GrpcStubCallableFactory {
+
+  @Override
+  public <RequestT, ResponseT> UnaryCallable<RequestT, ResponseT> createUnaryCallable(
+      GrpcCallSettings<RequestT, ResponseT> grpcCallSettings,
+      UnaryCallSettings<RequestT, ResponseT> callSettings,
+      ClientContext clientContext) {
+    return GrpcCallableFactory.createUnaryCallable(grpcCallSettings, callSettings, clientContext);
+  }
+
+  @Override
+  public <RequestT, ResponseT, PagedListResponseT>
+      UnaryCallable<RequestT, PagedListResponseT> createPagedCallable(
+          GrpcCallSettings<RequestT, ResponseT> grpcCallSettings,
+          PagedCallSettings<RequestT, ResponseT, PagedListResponseT> callSettings,
+          ClientContext clientContext) {
+    return GrpcCallableFactory.createPagedCallable(grpcCallSettings, callSettings, clientContext);
+  }
+
+  @Override
+  public <RequestT, ResponseT> UnaryCallable<RequestT, ResponseT> createBatchingCallable(
+      GrpcCallSettings<RequestT, ResponseT> grpcCallSettings,
+      BatchingCallSettings<RequestT, ResponseT> callSettings,
+      ClientContext clientContext) {
+    return GrpcCallableFactory.createBatchingCallable(
+        grpcCallSettings, callSettings, clientContext);
+  }
+
+  @Override
+  public <RequestT, ResponseT, MetadataT>
+      OperationCallable<RequestT, ResponseT, MetadataT> createOperationCallable(
+          GrpcCallSettings<RequestT, Operation> grpcCallSettings,
+          OperationCallSettings<RequestT, ResponseT, MetadataT> callSettings,
+          ClientContext clientContext,
+          OperationsStub operationsStub) {
+    return GrpcCallableFactory.createOperationCallable(
+        grpcCallSettings, callSettings, clientContext, operationsStub);
+  }
+
+  @Override
+  public <RequestT, ResponseT>
+      BidiStreamingCallable<RequestT, ResponseT> createBidiStreamingCallable(
+          GrpcCallSettings<RequestT, ResponseT> grpcCallSettings,
+          StreamingCallSettings<RequestT, ResponseT> callSettings,
+          ClientContext clientContext) {
+    return GrpcCallableFactory.createBidiStreamingCallable(
+        grpcCallSettings, callSettings, clientContext);
+  }
+
+  @Override
+  public <RequestT, ResponseT>
+      ServerStreamingCallable<RequestT, ResponseT> createServerStreamingCallable(
+          GrpcCallSettings<RequestT, ResponseT> grpcCallSettings,
+          ServerStreamingCallSettings<RequestT, ResponseT> callSettings,
+          ClientContext clientContext) {
+    return GrpcCallableFactory.createServerStreamingCallable(
+        grpcCallSettings, callSettings, clientContext);
+  }
+
+  @Override
+  public <RequestT, ResponseT>
+      ClientStreamingCallable<RequestT, ResponseT> createClientStreamingCallable(
+          GrpcCallSettings<RequestT, ResponseT> grpcCallSettings,
+          StreamingCallSettings<RequestT, ResponseT> callSettings,
+          ClientContext clientContext) {
+    return GrpcCallableFactory.createClientStreamingCallable(
+        grpcCallSettings, callSettings, clientContext);
+  }
+}
diff --git a/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/stub/GrpcUserEventServiceStub.java b/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/stub/GrpcUserEventServiceStub.java
new file mode 100644
index 00000000..b73298d2
--- /dev/null
+++ b/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/stub/GrpcUserEventServiceStub.java
@@ -0,0 +1,338 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.cloud.retail.v2.stub;
+
+import com.google.api.HttpBody;
+import com.google.api.gax.core.BackgroundResource;
+import com.google.api.gax.core.BackgroundResourceAggregation;
+import com.google.api.gax.grpc.GrpcCallSettings;
+import com.google.api.gax.grpc.GrpcStubCallableFactory;
+import com.google.api.gax.rpc.ClientContext;
+import com.google.api.gax.rpc.OperationCallable;
+import com.google.api.gax.rpc.RequestParamsExtractor;
+import com.google.api.gax.rpc.UnaryCallable;
+import com.google.cloud.retail.v2.CollectUserEventRequest;
+import com.google.cloud.retail.v2.ImportMetadata;
+import com.google.cloud.retail.v2.ImportUserEventsRequest;
+import com.google.cloud.retail.v2.ImportUserEventsResponse;
+import com.google.cloud.retail.v2.PurgeMetadata;
+import com.google.cloud.retail.v2.PurgeUserEventsRequest;
+import com.google.cloud.retail.v2.PurgeUserEventsResponse;
+import com.google.cloud.retail.v2.RejoinUserEventsMetadata;
+import com.google.cloud.retail.v2.RejoinUserEventsRequest;
+import com.google.cloud.retail.v2.RejoinUserEventsResponse;
+import com.google.cloud.retail.v2.UserEvent;
+import com.google.cloud.retail.v2.WriteUserEventRequest;
+import com.google.common.collect.ImmutableMap;
+import com.google.longrunning.Operation;
+import com.google.longrunning.stub.GrpcOperationsStub;
+import io.grpc.MethodDescriptor;
+import io.grpc.protobuf.ProtoUtils;
+import java.io.IOException;
+import java.util.Map;
+import java.util.concurrent.TimeUnit;
+import javax.annotation.Generated;
+
+// AUTO-GENERATED DOCUMENTATION AND CLASS.
+/**
+ * gRPC stub implementation for the UserEventService service API.
+ *
+ * <p>This class is for advanced usage and reflects the underlying API directly.
+ */
+@Generated("by gapic-generator-java")
+public class GrpcUserEventServiceStub extends UserEventServiceStub {
+  private static final MethodDescriptor<WriteUserEventRequest, UserEvent>
+      writeUserEventMethodDescriptor =
+          MethodDescriptor.<WriteUserEventRequest, UserEvent>newBuilder()
+              .setType(MethodDescriptor.MethodType.UNARY)
+              .setFullMethodName("google.cloud.retail.v2.UserEventService/WriteUserEvent")
+              .setRequestMarshaller(
+                  ProtoUtils.marshaller(WriteUserEventRequest.getDefaultInstance()))
+              .setResponseMarshaller(ProtoUtils.marshaller(UserEvent.getDefaultInstance()))
+              .build();
+
+  private static final MethodDescriptor<CollectUserEventRequest, HttpBody>
+      collectUserEventMethodDescriptor =
+          MethodDescriptor.<CollectUserEventRequest, HttpBody>newBuilder()
+              .setType(MethodDescriptor.MethodType.UNARY)
+              .setFullMethodName("google.cloud.retail.v2.UserEventService/CollectUserEvent")
+              .setRequestMarshaller(
+                  ProtoUtils.marshaller(CollectUserEventRequest.getDefaultInstance()))
+              .setResponseMarshaller(ProtoUtils.marshaller(HttpBody.getDefaultInstance()))
+              .build();
+
+  private static final MethodDescriptor<PurgeUserEventsRequest, Operation>
+      purgeUserEventsMethodDescriptor =
+          MethodDescriptor.<PurgeUserEventsRequest, Operation>newBuilder()
+              .setType(MethodDescriptor.MethodType.UNARY)
+              .setFullMethodName("google.cloud.retail.v2.UserEventService/PurgeUserEvents")
+              .setRequestMarshaller(
+                  ProtoUtils.marshaller(PurgeUserEventsRequest.getDefaultInstance()))
+              .setResponseMarshaller(ProtoUtils.marshaller(Operation.getDefaultInstance()))
+              .build();
+
+  private static final MethodDescriptor<ImportUserEventsRequest, Operation>
+      importUserEventsMethodDescriptor =
+          MethodDescriptor.<ImportUserEventsRequest, Operation>newBuilder()
+              .setType(MethodDescriptor.MethodType.UNARY)
+              .setFullMethodName("google.cloud.retail.v2.UserEventService/ImportUserEvents")
+              .setRequestMarshaller(
+                  ProtoUtils.marshaller(ImportUserEventsRequest.getDefaultInstance()))
+              .setResponseMarshaller(ProtoUtils.marshaller(Operation.getDefaultInstance()))
+              .build();
+
+  private static final MethodDescriptor<RejoinUserEventsRequest, Operation>
+      rejoinUserEventsMethodDescriptor =
+          MethodDescriptor.<RejoinUserEventsRequest, Operation>newBuilder()
+              .setType(MethodDescriptor.MethodType.UNARY)
+              .setFullMethodName("google.cloud.retail.v2.UserEventService/RejoinUserEvents")
+              .setRequestMarshaller(
+                  ProtoUtils.marshaller(RejoinUserEventsRequest.getDefaultInstance()))
+              .setResponseMarshaller(ProtoUtils.marshaller(Operation.getDefaultInstance()))
+              .build();
+
+  private final UnaryCallable<WriteUserEventRequest, UserEvent> writeUserEventCallable;
+  private final UnaryCallable<CollectUserEventRequest, HttpBody> collectUserEventCallable;
+  private final UnaryCallable<PurgeUserEventsRequest, Operation> purgeUserEventsCallable;
+  private final OperationCallable<PurgeUserEventsRequest, PurgeUserEventsResponse, PurgeMetadata>
+      purgeUserEventsOperationCallable;
+  private final UnaryCallable<ImportUserEventsRequest, Operation> importUserEventsCallable;
+  private final OperationCallable<ImportUserEventsRequest, ImportUserEventsResponse, ImportMetadata>
+      importUserEventsOperationCallable;
+  private final UnaryCallable<RejoinUserEventsRequest, Operation> rejoinUserEventsCallable;
+  private final OperationCallable<
+          RejoinUserEventsRequest, RejoinUserEventsResponse, RejoinUserEventsMetadata>
+      rejoinUserEventsOperationCallable;
+
+  private final BackgroundResource backgroundResources;
+  private final GrpcOperationsStub operationsStub;
+  private final GrpcStubCallableFactory callableFactory;
+
+  public static final GrpcUserEventServiceStub create(UserEventServiceStubSettings settings)
+      throws IOException {
+    return new GrpcUserEventServiceStub(settings, ClientContext.create(settings));
+  }
+
+  public static final GrpcUserEventServiceStub create(ClientContext clientContext)
+      throws IOException {
+    return new GrpcUserEventServiceStub(
+        UserEventServiceStubSettings.newBuilder().build(), clientContext);
+  }
+
+  public static final GrpcUserEventServiceStub create(
+      ClientContext clientContext, GrpcStubCallableFactory callableFactory) throws IOException {
+    return new GrpcUserEventServiceStub(
+        UserEventServiceStubSettings.newBuilder().build(), clientContext, callableFactory);
+  }
+
+  /**
+   * Constructs an instance of GrpcUserEventServiceStub, using the given settings. This is protected
+   * so that it is easy to make a subclass, but otherwise, the static factory methods should be
+   * preferred.
+   */
+  protected GrpcUserEventServiceStub(
+      UserEventServiceStubSettings settings, ClientContext clientContext) throws IOException {
+    this(settings, clientContext, new GrpcUserEventServiceCallableFactory());
+  }
+
+  /**
+   * Constructs an instance of GrpcUserEventServiceStub, using the given settings. This is protected
+   * so that it is easy to make a subclass, but otherwise, the static factory methods should be
+   * preferred.
+   */
+  protected GrpcUserEventServiceStub(
+      UserEventServiceStubSettings settings,
+      ClientContext clientContext,
+      GrpcStubCallableFactory callableFactory)
+      throws IOException {
+    this.callableFactory = callableFactory;
+    this.operationsStub = GrpcOperationsStub.create(clientContext, callableFactory);
+
+    GrpcCallSettings<WriteUserEventRequest, UserEvent> writeUserEventTransportSettings =
+        GrpcCallSettings.<WriteUserEventRequest, UserEvent>newBuilder()
+            .setMethodDescriptor(writeUserEventMethodDescriptor)
+            .setParamsExtractor(
+                new RequestParamsExtractor<WriteUserEventRequest>() {
+                  @Override
+                  public Map<String, String> extract(WriteUserEventRequest request) {
+                    ImmutableMap.Builder<String, String> params = ImmutableMap.builder();
+                    params.put("parent", String.valueOf(request.getParent()));
+                    return params.build();
+                  }
+                })
+            .build();
+    GrpcCallSettings<CollectUserEventRequest, HttpBody> collectUserEventTransportSettings =
+        GrpcCallSettings.<CollectUserEventRequest, HttpBody>newBuilder()
+            .setMethodDescriptor(collectUserEventMethodDescriptor)
+            .setParamsExtractor(
+                new RequestParamsExtractor<CollectUserEventRequest>() {
+                  @Override
+                  public Map<String, String> extract(CollectUserEventRequest request) {
+                    ImmutableMap.Builder<String, String> params = ImmutableMap.builder();
+                    params.put("parent", String.valueOf(request.getParent()));
+                    return params.build();
+                  }
+                })
+            .build();
+    GrpcCallSettings<PurgeUserEventsRequest, Operation> purgeUserEventsTransportSettings =
+        GrpcCallSettings.<PurgeUserEventsRequest, Operation>newBuilder()
+            .setMethodDescriptor(purgeUserEventsMethodDescriptor)
+            .setParamsExtractor(
+                new RequestParamsExtractor<PurgeUserEventsRequest>() {
+                  @Override
+                  public Map<String, String> extract(PurgeUserEventsRequest request) {
+                    ImmutableMap.Builder<String, String> params = ImmutableMap.builder();
+                    params.put("parent", String.valueOf(request.getParent()));
+                    return params.build();
+                  }
+                })
+            .build();
+    GrpcCallSettings<ImportUserEventsRequest, Operation> importUserEventsTransportSettings =
+        GrpcCallSettings.<ImportUserEventsRequest, Operation>newBuilder()
+            .setMethodDescriptor(importUserEventsMethodDescriptor)
+            .setParamsExtractor(
+                new RequestParamsExtractor<ImportUserEventsRequest>() {
+                  @Override
+                  public Map<String, String> extract(ImportUserEventsRequest request) {
+                    ImmutableMap.Builder<String, String> params = ImmutableMap.builder();
+                    params.put("parent", String.valueOf(request.getParent()));
+                    return params.build();
+                  }
+                })
+            .build();
+    GrpcCallSettings<RejoinUserEventsRequest, Operation> rejoinUserEventsTransportSettings =
+        GrpcCallSettings.<RejoinUserEventsRequest, Operation>newBuilder()
+            .setMethodDescriptor(rejoinUserEventsMethodDescriptor)
+            .setParamsExtractor(
+                new RequestParamsExtractor<RejoinUserEventsRequest>() {
+                  @Override
+                  public Map<String, String> extract(RejoinUserEventsRequest request) {
+                    ImmutableMap.Builder<String, String> params = ImmutableMap.builder();
+                    params.put("parent", String.valueOf(request.getParent()));
+                    return params.build();
+                  }
+                })
+            .build();
+
+    this.writeUserEventCallable =
+        callableFactory.createUnaryCallable(
+            writeUserEventTransportSettings, settings.writeUserEventSettings(), clientContext);
+    this.collectUserEventCallable =
+        callableFactory.createUnaryCallable(
+            collectUserEventTransportSettings, settings.collectUserEventSettings(), clientContext);
+    this.purgeUserEventsCallable =
+        callableFactory.createUnaryCallable(
+            purgeUserEventsTransportSettings, settings.purgeUserEventsSettings(), clientContext);
+    this.purgeUserEventsOperationCallable =
+        callableFactory.createOperationCallable(
+            purgeUserEventsTransportSettings,
+            settings.purgeUserEventsOperationSettings(),
+            clientContext,
+            operationsStub);
+    this.importUserEventsCallable =
+        callableFactory.createUnaryCallable(
+            importUserEventsTransportSettings, settings.importUserEventsSettings(), clientContext);
+    this.importUserEventsOperationCallable =
+        callableFactory.createOperationCallable(
+            importUserEventsTransportSettings,
+            settings.importUserEventsOperationSettings(),
+            clientContext,
+            operationsStub);
+    this.rejoinUserEventsCallable =
+        callableFactory.createUnaryCallable(
+            rejoinUserEventsTransportSettings, settings.rejoinUserEventsSettings(), clientContext);
+    this.rejoinUserEventsOperationCallable =
+        callableFactory.createOperationCallable(
+            rejoinUserEventsTransportSettings,
+            settings.rejoinUserEventsOperationSettings(),
+            clientContext,
+            operationsStub);
+
+    this.backgroundResources =
+        new BackgroundResourceAggregation(clientContext.getBackgroundResources());
+  }
+
+  public GrpcOperationsStub getOperationsStub() {
+    return operationsStub;
+  }
+
+  public UnaryCallable<WriteUserEventRequest, UserEvent> writeUserEventCallable() {
+    return writeUserEventCallable;
+  }
+
+  public UnaryCallable<CollectUserEventRequest, HttpBody> collectUserEventCallable() {
+    return collectUserEventCallable;
+  }
+
+  public UnaryCallable<PurgeUserEventsRequest, Operation> purgeUserEventsCallable() {
+    return purgeUserEventsCallable;
+  }
+
+  public OperationCallable<PurgeUserEventsRequest, PurgeUserEventsResponse, PurgeMetadata>
+      purgeUserEventsOperationCallable() {
+    return purgeUserEventsOperationCallable;
+  }
+
+  public UnaryCallable<ImportUserEventsRequest, Operation> importUserEventsCallable() {
+    return importUserEventsCallable;
+  }
+
+  public OperationCallable<ImportUserEventsRequest, ImportUserEventsResponse, ImportMetadata>
+      importUserEventsOperationCallable() {
+    return importUserEventsOperationCallable;
+  }
+
+  public UnaryCallable<RejoinUserEventsRequest, Operation> rejoinUserEventsCallable() {
+    return rejoinUserEventsCallable;
+  }
+
+  public OperationCallable<
+          RejoinUserEventsRequest, RejoinUserEventsResponse, RejoinUserEventsMetadata>
+      rejoinUserEventsOperationCallable() {
+    return rejoinUserEventsOperationCallable;
+  }
+
+  @Override
+  public final void close() {
+    shutdown();
+  }
+
+  @Override
+  public void shutdown() {
+    backgroundResources.shutdown();
+  }
+
+  @Override
+  public boolean isShutdown() {
+    return backgroundResources.isShutdown();
+  }
+
+  @Override
+  public boolean isTerminated() {
+    return backgroundResources.isTerminated();
+  }
+
+  @Override
+  public void shutdownNow() {
+    backgroundResources.shutdownNow();
+  }
+
+  @Override
+  public boolean awaitTermination(long duration, TimeUnit unit) throws InterruptedException {
+    return backgroundResources.awaitTermination(duration, unit);
+  }
+}
diff --git a/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/stub/PredictionServiceStub.java b/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/stub/PredictionServiceStub.java
new file mode 100644
index 00000000..2b93883c
--- /dev/null
+++ b/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/stub/PredictionServiceStub.java
@@ -0,0 +1,40 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.cloud.retail.v2.stub;
+
+import com.google.api.gax.core.BackgroundResource;
+import com.google.api.gax.rpc.UnaryCallable;
+import com.google.cloud.retail.v2.PredictRequest;
+import com.google.cloud.retail.v2.PredictResponse;
+import javax.annotation.Generated;
+
+// AUTO-GENERATED DOCUMENTATION AND CLASS.
+/**
+ * Base stub class for the PredictionService service API.
+ *
+ * <p>This class is for advanced usage and reflects the underlying API directly.
+ */
+@Generated("by gapic-generator")
+public abstract class PredictionServiceStub implements BackgroundResource {
+
+  public UnaryCallable<PredictRequest, PredictResponse> predictCallable() {
+    throw new UnsupportedOperationException("Not implemented: predictCallable()");
+  }
+
+  @Override
+  public abstract void close();
+}
diff --git a/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/stub/PredictionServiceStubSettings.java b/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/stub/PredictionServiceStubSettings.java
new file mode 100644
index 00000000..afa05b51
--- /dev/null
+++ b/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/stub/PredictionServiceStubSettings.java
@@ -0,0 +1,270 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.cloud.retail.v2.stub;
+
+import com.google.api.core.ApiFunction;
+import com.google.api.core.BetaApi;
+import com.google.api.gax.core.GaxProperties;
+import com.google.api.gax.core.GoogleCredentialsProvider;
+import com.google.api.gax.core.InstantiatingExecutorProvider;
+import com.google.api.gax.grpc.GaxGrpcProperties;
+import com.google.api.gax.grpc.GrpcTransportChannel;
+import com.google.api.gax.grpc.InstantiatingGrpcChannelProvider;
+import com.google.api.gax.retrying.RetrySettings;
+import com.google.api.gax.rpc.ApiClientHeaderProvider;
+import com.google.api.gax.rpc.ClientContext;
+import com.google.api.gax.rpc.StatusCode;
+import com.google.api.gax.rpc.StubSettings;
+import com.google.api.gax.rpc.TransportChannelProvider;
+import com.google.api.gax.rpc.UnaryCallSettings;
+import com.google.cloud.retail.v2.PredictRequest;
+import com.google.cloud.retail.v2.PredictResponse;
+import com.google.common.collect.ImmutableList;
+import com.google.common.collect.ImmutableMap;
+import com.google.common.collect.ImmutableSet;
+import com.google.common.collect.Lists;
+import java.io.IOException;
+import java.util.List;
+import javax.annotation.Generated;
+import org.threeten.bp.Duration;
+
+// AUTO-GENERATED DOCUMENTATION AND CLASS.
+/**
+ * Settings class to configure an instance of {@link PredictionServiceStub}.
+ *
+ * <p>The default instance has everything set to sensible defaults:
+ *
+ * <ul>
+ *   <li>The default service address (retail.googleapis.com) and default port (443) are used.
+ *   <li>Credentials are acquired automatically through Application Default Credentials.
+ *   <li>Retries are configured for idempotent methods but not for non-idempotent methods.
+ * </ul>
+ *
+ * <p>The builder of this class is recursive, so contained classes are themselves builders. When
+ * build() is called, the tree of builders is called to create the complete settings object.
+ *
+ * <p>For example, to set the total timeout of predict to 30 seconds:
+ *
+ * <pre>{@code
+ * PredictionServiceStubSettings.Builder predictionServiceSettingsBuilder =
+ *     PredictionServiceStubSettings.newBuilder();
+ * predictionServiceSettingsBuilder
+ *     .predictSettings()
+ *     .setRetrySettings(
+ *         predictionServiceSettingsBuilder
+ *             .predictSettings()
+ *             .getRetrySettings()
+ *             .toBuilder()
+ *             .setTotalTimeout(Duration.ofSeconds(30))
+ *             .build());
+ * PredictionServiceStubSettings predictionServiceSettings =
+ *     predictionServiceSettingsBuilder.build();
+ * }</pre>
+ */
+@BetaApi
+@Generated("by gapic-generator-java")
+public class PredictionServiceStubSettings extends StubSettings<PredictionServiceStubSettings> {
+  /** The default scopes of the service. */
+  private static final ImmutableList<String> DEFAULT_SERVICE_SCOPES =
+      ImmutableList.<String>builder().add("https://www.googleapis.com/auth/cloud-platform").build();
+
+  private final UnaryCallSettings<PredictRequest, PredictResponse> predictSettings;
+
+  /** Returns the object with the settings used for calls to predict. */
+  public UnaryCallSettings<PredictRequest, PredictResponse> predictSettings() {
+    return predictSettings;
+  }
+
+  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
+  public PredictionServiceStub createStub() throws IOException {
+    if (getTransportChannelProvider()
+        .getTransportName()
+        .equals(GrpcTransportChannel.getGrpcTransportName())) {
+      return GrpcPredictionServiceStub.create(this);
+    }
+    throw new UnsupportedOperationException(
+        String.format(
+            "Transport not supported: %s", getTransportChannelProvider().getTransportName()));
+  }
+
+  /** Returns a builder for the default ExecutorProvider for this service. */
+  public static InstantiatingExecutorProvider.Builder defaultExecutorProviderBuilder() {
+    return InstantiatingExecutorProvider.newBuilder();
+  }
+
+  /** Returns the default service endpoint. */
+  public static String getDefaultEndpoint() {
+    return "retail.googleapis.com:443";
+  }
+
+  /** Returns the default service scopes. */
+  public static List<String> getDefaultServiceScopes() {
+    return DEFAULT_SERVICE_SCOPES;
+  }
+
+  /** Returns a builder for the default credentials for this service. */
+  public static GoogleCredentialsProvider.Builder defaultCredentialsProviderBuilder() {
+    return GoogleCredentialsProvider.newBuilder().setScopesToApply(DEFAULT_SERVICE_SCOPES);
+  }
+
+  /** Returns a builder for the default ChannelProvider for this service. */
+  public static InstantiatingGrpcChannelProvider.Builder defaultGrpcTransportProviderBuilder() {
+    return InstantiatingGrpcChannelProvider.newBuilder()
+        .setMaxInboundMessageSize(Integer.MAX_VALUE);
+  }
+
+  public static TransportChannelProvider defaultTransportChannelProvider() {
+    return defaultGrpcTransportProviderBuilder().build();
+  }
+
+  @BetaApi("The surface for customizing headers is not stable yet and may change in the future.")
+  public static ApiClientHeaderProvider.Builder defaultApiClientHeaderProviderBuilder() {
+    return ApiClientHeaderProvider.newBuilder()
+        .setGeneratedLibToken(
+            "gapic", GaxProperties.getLibraryVersion(PredictionServiceStubSettings.class))
+        .setTransportToken(
+            GaxGrpcProperties.getGrpcTokenName(), GaxGrpcProperties.getGrpcVersion());
+  }
+
+  /** Returns a new builder for this class. */
+  public static Builder newBuilder() {
+    return Builder.createDefault();
+  }
+
+  /** Returns a new builder for this class. */
+  public static Builder newBuilder(ClientContext clientContext) {
+    return new Builder(clientContext);
+  }
+
+  /** Returns a builder containing all the values of this settings class. */
+  public Builder toBuilder() {
+    return new Builder(this);
+  }
+
+  protected PredictionServiceStubSettings(Builder settingsBuilder) throws IOException {
+    super(settingsBuilder);
+
+    predictSettings = settingsBuilder.predictSettings().build();
+  }
+
+  /** Builder for PredictionServiceStubSettings. */
+  public static class Builder extends StubSettings.Builder<PredictionServiceStubSettings, Builder> {
+    private final ImmutableList<UnaryCallSettings.Builder<?, ?>> unaryMethodSettingsBuilders;
+    private final UnaryCallSettings.Builder<PredictRequest, PredictResponse> predictSettings;
+    private static final ImmutableMap<String, ImmutableSet<StatusCode.Code>>
+        RETRYABLE_CODE_DEFINITIONS;
+
+    static {
+      ImmutableMap.Builder<String, ImmutableSet<StatusCode.Code>> definitions =
+          ImmutableMap.builder();
+      definitions.put(
+          "retry_policy_0_codes",
+          ImmutableSet.copyOf(
+              Lists.<StatusCode.Code>newArrayList(
+                  StatusCode.Code.UNAVAILABLE, StatusCode.Code.DEADLINE_EXCEEDED)));
+      RETRYABLE_CODE_DEFINITIONS = definitions.build();
+    }
+
+    private static final ImmutableMap<String, RetrySettings> RETRY_PARAM_DEFINITIONS;
+
+    static {
+      ImmutableMap.Builder<String, RetrySettings> definitions = ImmutableMap.builder();
+      RetrySettings settings = null;
+      settings =
+          RetrySettings.newBuilder()
+              .setInitialRetryDelay(Duration.ofMillis(100L))
+              .setRetryDelayMultiplier(1.3)
+              .setMaxRetryDelay(Duration.ofMillis(60000L))
+              .setInitialRpcTimeout(Duration.ofMillis(60000L))
+              .setRpcTimeoutMultiplier(1.0)
+              .setMaxRpcTimeout(Duration.ofMillis(60000L))
+              .setTotalTimeout(Duration.ofMillis(60000L))
+              .build();
+      definitions.put("retry_policy_0_params", settings);
+      RETRY_PARAM_DEFINITIONS = definitions.build();
+    }
+
+    protected Builder() {
+      this(((ClientContext) null));
+    }
+
+    protected Builder(ClientContext clientContext) {
+      super(clientContext);
+
+      predictSettings = UnaryCallSettings.newUnaryCallSettingsBuilder();
+
+      unaryMethodSettingsBuilders =
+          ImmutableList.<UnaryCallSettings.Builder<?, ?>>of(predictSettings);
+      initDefaults(this);
+    }
+
+    protected Builder(PredictionServiceStubSettings settings) {
+      super(settings);
+
+      predictSettings = settings.predictSettings.toBuilder();
+
+      unaryMethodSettingsBuilders =
+          ImmutableList.<UnaryCallSettings.Builder<?, ?>>of(predictSettings);
+    }
+
+    private static Builder createDefault() {
+      Builder builder = new Builder(((ClientContext) null));
+
+      builder.setTransportChannelProvider(defaultTransportChannelProvider());
+      builder.setCredentialsProvider(defaultCredentialsProviderBuilder().build());
+      builder.setInternalHeaderProvider(defaultApiClientHeaderProviderBuilder().build());
+      builder.setEndpoint(getDefaultEndpoint());
+
+      return initDefaults(builder);
+    }
+
+    private static Builder initDefaults(Builder builder) {
+      builder
+          .predictSettings()
+          .setRetryableCodes(RETRYABLE_CODE_DEFINITIONS.get("retry_policy_0_codes"))
+          .setRetrySettings(RETRY_PARAM_DEFINITIONS.get("retry_policy_0_params"));
+
+      return builder;
+    }
+
+    // NEXT_MAJOR_VER: remove 'throws Exception'.
+    /**
+     * Applies the given settings updater function to all of the unary API methods in this service.
+     *
+     * <p>Note: This method does not support applying settings to streaming methods.
+     */
+    public Builder applyToAllUnaryMethods(
+        ApiFunction<UnaryCallSettings.Builder<?, ?>, Void> settingsUpdater) throws Exception {
+      super.applyToAllUnaryMethods(unaryMethodSettingsBuilders, settingsUpdater);
+      return this;
+    }
+
+    public ImmutableList<UnaryCallSettings.Builder<?, ?>> unaryMethodSettingsBuilders() {
+      return unaryMethodSettingsBuilders;
+    }
+
+    /** Returns the builder for the settings used for calls to predict. */
+    public UnaryCallSettings.Builder<PredictRequest, PredictResponse> predictSettings() {
+      return predictSettings;
+    }
+
+    @Override
+    public PredictionServiceStubSettings build() throws IOException {
+      return new PredictionServiceStubSettings(this);
+    }
+  }
+}
diff --git a/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/stub/ProductServiceStub.java b/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/stub/ProductServiceStub.java
new file mode 100644
index 00000000..f0f04c19
--- /dev/null
+++ b/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/stub/ProductServiceStub.java
@@ -0,0 +1,75 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.cloud.retail.v2.stub;
+
+import com.google.api.gax.core.BackgroundResource;
+import com.google.api.gax.rpc.OperationCallable;
+import com.google.api.gax.rpc.UnaryCallable;
+import com.google.cloud.retail.v2.CreateProductRequest;
+import com.google.cloud.retail.v2.DeleteProductRequest;
+import com.google.cloud.retail.v2.GetProductRequest;
+import com.google.cloud.retail.v2.ImportMetadata;
+import com.google.cloud.retail.v2.ImportProductsRequest;
+import com.google.cloud.retail.v2.ImportProductsResponse;
+import com.google.cloud.retail.v2.Product;
+import com.google.cloud.retail.v2.UpdateProductRequest;
+import com.google.longrunning.Operation;
+import com.google.longrunning.stub.OperationsStub;
+import com.google.protobuf.Empty;
+import javax.annotation.Generated;
+
+// AUTO-GENERATED DOCUMENTATION AND CLASS.
+/**
+ * Base stub class for the ProductService service API.
+ *
+ * <p>This class is for advanced usage and reflects the underlying API directly.
+ */
+@Generated("by gapic-generator")
+public abstract class ProductServiceStub implements BackgroundResource {
+
+  public OperationsStub getOperationsStub() {
+    throw new UnsupportedOperationException("Not implemented: getOperationsStub()");
+  }
+
+  public UnaryCallable<CreateProductRequest, Product> createProductCallable() {
+    throw new UnsupportedOperationException("Not implemented: createProductCallable()");
+  }
+
+  public UnaryCallable<GetProductRequest, Product> getProductCallable() {
+    throw new UnsupportedOperationException("Not implemented: getProductCallable()");
+  }
+
+  public UnaryCallable<UpdateProductRequest, Product> updateProductCallable() {
+    throw new UnsupportedOperationException("Not implemented: updateProductCallable()");
+  }
+
+  public UnaryCallable<DeleteProductRequest, Empty> deleteProductCallable() {
+    throw new UnsupportedOperationException("Not implemented: deleteProductCallable()");
+  }
+
+  public OperationCallable<ImportProductsRequest, ImportProductsResponse, ImportMetadata>
+      importProductsOperationCallable() {
+    throw new UnsupportedOperationException("Not implemented: importProductsOperationCallable()");
+  }
+
+  public UnaryCallable<ImportProductsRequest, Operation> importProductsCallable() {
+    throw new UnsupportedOperationException("Not implemented: importProductsCallable()");
+  }
+
+  @Override
+  public abstract void close();
+}
diff --git a/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/stub/ProductServiceStubSettings.java b/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/stub/ProductServiceStubSettings.java
new file mode 100644
index 00000000..2e6865f2
--- /dev/null
+++ b/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/stub/ProductServiceStubSettings.java
@@ -0,0 +1,419 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.cloud.retail.v2.stub;
+
+import com.google.api.core.ApiFunction;
+import com.google.api.core.BetaApi;
+import com.google.api.gax.core.GaxProperties;
+import com.google.api.gax.core.GoogleCredentialsProvider;
+import com.google.api.gax.core.InstantiatingExecutorProvider;
+import com.google.api.gax.grpc.GaxGrpcProperties;
+import com.google.api.gax.grpc.GrpcTransportChannel;
+import com.google.api.gax.grpc.InstantiatingGrpcChannelProvider;
+import com.google.api.gax.grpc.ProtoOperationTransformers;
+import com.google.api.gax.longrunning.OperationSnapshot;
+import com.google.api.gax.longrunning.OperationTimedPollAlgorithm;
+import com.google.api.gax.retrying.RetrySettings;
+import com.google.api.gax.rpc.ApiClientHeaderProvider;
+import com.google.api.gax.rpc.ClientContext;
+import com.google.api.gax.rpc.OperationCallSettings;
+import com.google.api.gax.rpc.StatusCode;
+import com.google.api.gax.rpc.StubSettings;
+import com.google.api.gax.rpc.TransportChannelProvider;
+import com.google.api.gax.rpc.UnaryCallSettings;
+import com.google.cloud.retail.v2.CreateProductRequest;
+import com.google.cloud.retail.v2.DeleteProductRequest;
+import com.google.cloud.retail.v2.GetProductRequest;
+import com.google.cloud.retail.v2.ImportMetadata;
+import com.google.cloud.retail.v2.ImportProductsRequest;
+import com.google.cloud.retail.v2.ImportProductsResponse;
+import com.google.cloud.retail.v2.Product;
+import com.google.cloud.retail.v2.UpdateProductRequest;
+import com.google.common.collect.ImmutableList;
+import com.google.common.collect.ImmutableMap;
+import com.google.common.collect.ImmutableSet;
+import com.google.common.collect.Lists;
+import com.google.longrunning.Operation;
+import com.google.protobuf.Empty;
+import java.io.IOException;
+import java.util.List;
+import javax.annotation.Generated;
+import org.threeten.bp.Duration;
+
+// AUTO-GENERATED DOCUMENTATION AND CLASS.
+/**
+ * Settings class to configure an instance of {@link ProductServiceStub}.
+ *
+ * <p>The default instance has everything set to sensible defaults:
+ *
+ * <ul>
+ *   <li>The default service address (retail.googleapis.com) and default port (443) are used.
+ *   <li>Credentials are acquired automatically through Application Default Credentials.
+ *   <li>Retries are configured for idempotent methods but not for non-idempotent methods.
+ * </ul>
+ *
+ * <p>The builder of this class is recursive, so contained classes are themselves builders. When
+ * build() is called, the tree of builders is called to create the complete settings object.
+ *
+ * <p>For example, to set the total timeout of createProduct to 30 seconds:
+ *
+ * <pre>{@code
+ * ProductServiceStubSettings.Builder productServiceSettingsBuilder =
+ *     ProductServiceStubSettings.newBuilder();
+ * productServiceSettingsBuilder
+ *     .createProductSettings()
+ *     .setRetrySettings(
+ *         productServiceSettingsBuilder
+ *             .createProductSettings()
+ *             .getRetrySettings()
+ *             .toBuilder()
+ *             .setTotalTimeout(Duration.ofSeconds(30))
+ *             .build());
+ * ProductServiceStubSettings productServiceSettings = productServiceSettingsBuilder.build();
+ * }</pre>
+ */
+@BetaApi
+@Generated("by gapic-generator-java")
+public class ProductServiceStubSettings extends StubSettings<ProductServiceStubSettings> {
+  /** The default scopes of the service. */
+  private static final ImmutableList<String> DEFAULT_SERVICE_SCOPES =
+      ImmutableList.<String>builder().add("https://www.googleapis.com/auth/cloud-platform").build();
+
+  private final UnaryCallSettings<CreateProductRequest, Product> createProductSettings;
+  private final UnaryCallSettings<GetProductRequest, Product> getProductSettings;
+  private final UnaryCallSettings<UpdateProductRequest, Product> updateProductSettings;
+  private final UnaryCallSettings<DeleteProductRequest, Empty> deleteProductSettings;
+  private final UnaryCallSettings<ImportProductsRequest, Operation> importProductsSettings;
+  private final OperationCallSettings<ImportProductsRequest, ImportProductsResponse, ImportMetadata>
+      importProductsOperationSettings;
+
+  /** Returns the object with the settings used for calls to createProduct. */
+  public UnaryCallSettings<CreateProductRequest, Product> createProductSettings() {
+    return createProductSettings;
+  }
+
+  /** Returns the object with the settings used for calls to getProduct. */
+  public UnaryCallSettings<GetProductRequest, Product> getProductSettings() {
+    return getProductSettings;
+  }
+
+  /** Returns the object with the settings used for calls to updateProduct. */
+  public UnaryCallSettings<UpdateProductRequest, Product> updateProductSettings() {
+    return updateProductSettings;
+  }
+
+  /** Returns the object with the settings used for calls to deleteProduct. */
+  public UnaryCallSettings<DeleteProductRequest, Empty> deleteProductSettings() {
+    return deleteProductSettings;
+  }
+
+  /** Returns the object with the settings used for calls to importProducts. */
+  public UnaryCallSettings<ImportProductsRequest, Operation> importProductsSettings() {
+    return importProductsSettings;
+  }
+
+  /** Returns the object with the settings used for calls to importProducts. */
+  public OperationCallSettings<ImportProductsRequest, ImportProductsResponse, ImportMetadata>
+      importProductsOperationSettings() {
+    return importProductsOperationSettings;
+  }
+
+  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
+  public ProductServiceStub createStub() throws IOException {
+    if (getTransportChannelProvider()
+        .getTransportName()
+        .equals(GrpcTransportChannel.getGrpcTransportName())) {
+      return GrpcProductServiceStub.create(this);
+    }
+    throw new UnsupportedOperationException(
+        String.format(
+            "Transport not supported: %s", getTransportChannelProvider().getTransportName()));
+  }
+
+  /** Returns a builder for the default ExecutorProvider for this service. */
+  public static InstantiatingExecutorProvider.Builder defaultExecutorProviderBuilder() {
+    return InstantiatingExecutorProvider.newBuilder();
+  }
+
+  /** Returns the default service endpoint. */
+  public static String getDefaultEndpoint() {
+    return "retail.googleapis.com:443";
+  }
+
+  /** Returns the default service scopes. */
+  public static List<String> getDefaultServiceScopes() {
+    return DEFAULT_SERVICE_SCOPES;
+  }
+
+  /** Returns a builder for the default credentials for this service. */
+  public static GoogleCredentialsProvider.Builder defaultCredentialsProviderBuilder() {
+    return GoogleCredentialsProvider.newBuilder().setScopesToApply(DEFAULT_SERVICE_SCOPES);
+  }
+
+  /** Returns a builder for the default ChannelProvider for this service. */
+  public static InstantiatingGrpcChannelProvider.Builder defaultGrpcTransportProviderBuilder() {
+    return InstantiatingGrpcChannelProvider.newBuilder()
+        .setMaxInboundMessageSize(Integer.MAX_VALUE);
+  }
+
+  public static TransportChannelProvider defaultTransportChannelProvider() {
+    return defaultGrpcTransportProviderBuilder().build();
+  }
+
+  @BetaApi("The surface for customizing headers is not stable yet and may change in the future.")
+  public static ApiClientHeaderProvider.Builder defaultApiClientHeaderProviderBuilder() {
+    return ApiClientHeaderProvider.newBuilder()
+        .setGeneratedLibToken(
+            "gapic", GaxProperties.getLibraryVersion(ProductServiceStubSettings.class))
+        .setTransportToken(
+            GaxGrpcProperties.getGrpcTokenName(), GaxGrpcProperties.getGrpcVersion());
+  }
+
+  /** Returns a new builder for this class. */
+  public static Builder newBuilder() {
+    return Builder.createDefault();
+  }
+
+  /** Returns a new builder for this class. */
+  public static Builder newBuilder(ClientContext clientContext) {
+    return new Builder(clientContext);
+  }
+
+  /** Returns a builder containing all the values of this settings class. */
+  public Builder toBuilder() {
+    return new Builder(this);
+  }
+
+  protected ProductServiceStubSettings(Builder settingsBuilder) throws IOException {
+    super(settingsBuilder);
+
+    createProductSettings = settingsBuilder.createProductSettings().build();
+    getProductSettings = settingsBuilder.getProductSettings().build();
+    updateProductSettings = settingsBuilder.updateProductSettings().build();
+    deleteProductSettings = settingsBuilder.deleteProductSettings().build();
+    importProductsSettings = settingsBuilder.importProductsSettings().build();
+    importProductsOperationSettings = settingsBuilder.importProductsOperationSettings().build();
+  }
+
+  /** Builder for ProductServiceStubSettings. */
+  public static class Builder extends StubSettings.Builder<ProductServiceStubSettings, Builder> {
+    private final ImmutableList<UnaryCallSettings.Builder<?, ?>> unaryMethodSettingsBuilders;
+    private final UnaryCallSettings.Builder<CreateProductRequest, Product> createProductSettings;
+    private final UnaryCallSettings.Builder<GetProductRequest, Product> getProductSettings;
+    private final UnaryCallSettings.Builder<UpdateProductRequest, Product> updateProductSettings;
+    private final UnaryCallSettings.Builder<DeleteProductRequest, Empty> deleteProductSettings;
+    private final UnaryCallSettings.Builder<ImportProductsRequest, Operation>
+        importProductsSettings;
+    private final OperationCallSettings.Builder<
+            ImportProductsRequest, ImportProductsResponse, ImportMetadata>
+        importProductsOperationSettings;
+    private static final ImmutableMap<String, ImmutableSet<StatusCode.Code>>
+        RETRYABLE_CODE_DEFINITIONS;
+
+    static {
+      ImmutableMap.Builder<String, ImmutableSet<StatusCode.Code>> definitions =
+          ImmutableMap.builder();
+      definitions.put(
+          "retry_policy_0_codes",
+          ImmutableSet.copyOf(
+              Lists.<StatusCode.Code>newArrayList(
+                  StatusCode.Code.UNAVAILABLE, StatusCode.Code.DEADLINE_EXCEEDED)));
+      RETRYABLE_CODE_DEFINITIONS = definitions.build();
+    }
+
+    private static final ImmutableMap<String, RetrySettings> RETRY_PARAM_DEFINITIONS;
+
+    static {
+      ImmutableMap.Builder<String, RetrySettings> definitions = ImmutableMap.builder();
+      RetrySettings settings = null;
+      settings =
+          RetrySettings.newBuilder()
+              .setInitialRetryDelay(Duration.ofMillis(100L))
+              .setRetryDelayMultiplier(1.3)
+              .setMaxRetryDelay(Duration.ofMillis(60000L))
+              .setInitialRpcTimeout(Duration.ofMillis(60000L))
+              .setRpcTimeoutMultiplier(1.0)
+              .setMaxRpcTimeout(Duration.ofMillis(60000L))
+              .setTotalTimeout(Duration.ofMillis(60000L))
+              .build();
+      definitions.put("retry_policy_0_params", settings);
+      RETRY_PARAM_DEFINITIONS = definitions.build();
+    }
+
+    protected Builder() {
+      this(((ClientContext) null));
+    }
+
+    protected Builder(ClientContext clientContext) {
+      super(clientContext);
+
+      createProductSettings = UnaryCallSettings.newUnaryCallSettingsBuilder();
+      getProductSettings = UnaryCallSettings.newUnaryCallSettingsBuilder();
+      updateProductSettings = UnaryCallSettings.newUnaryCallSettingsBuilder();
+      deleteProductSettings = UnaryCallSettings.newUnaryCallSettingsBuilder();
+      importProductsSettings = UnaryCallSettings.newUnaryCallSettingsBuilder();
+      importProductsOperationSettings = OperationCallSettings.newBuilder();
+
+      unaryMethodSettingsBuilders =
+          ImmutableList.<UnaryCallSettings.Builder<?, ?>>of(
+              createProductSettings,
+              getProductSettings,
+              updateProductSettings,
+              deleteProductSettings,
+              importProductsSettings);
+      initDefaults(this);
+    }
+
+    protected Builder(ProductServiceStubSettings settings) {
+      super(settings);
+
+      createProductSettings = settings.createProductSettings.toBuilder();
+      getProductSettings = settings.getProductSettings.toBuilder();
+      updateProductSettings = settings.updateProductSettings.toBuilder();
+      deleteProductSettings = settings.deleteProductSettings.toBuilder();
+      importProductsSettings = settings.importProductsSettings.toBuilder();
+      importProductsOperationSettings = settings.importProductsOperationSettings.toBuilder();
+
+      unaryMethodSettingsBuilders =
+          ImmutableList.<UnaryCallSettings.Builder<?, ?>>of(
+              createProductSettings,
+              getProductSettings,
+              updateProductSettings,
+              deleteProductSettings,
+              importProductsSettings);
+    }
+
+    private static Builder createDefault() {
+      Builder builder = new Builder(((ClientContext) null));
+
+      builder.setTransportChannelProvider(defaultTransportChannelProvider());
+      builder.setCredentialsProvider(defaultCredentialsProviderBuilder().build());
+      builder.setInternalHeaderProvider(defaultApiClientHeaderProviderBuilder().build());
+      builder.setEndpoint(getDefaultEndpoint());
+
+      return initDefaults(builder);
+    }
+
+    private static Builder initDefaults(Builder builder) {
+      builder
+          .createProductSettings()
+          .setRetryableCodes(RETRYABLE_CODE_DEFINITIONS.get("retry_policy_0_codes"))
+          .setRetrySettings(RETRY_PARAM_DEFINITIONS.get("retry_policy_0_params"));
+
+      builder
+          .getProductSettings()
+          .setRetryableCodes(RETRYABLE_CODE_DEFINITIONS.get("retry_policy_0_codes"))
+          .setRetrySettings(RETRY_PARAM_DEFINITIONS.get("retry_policy_0_params"));
+
+      builder
+          .updateProductSettings()
+          .setRetryableCodes(RETRYABLE_CODE_DEFINITIONS.get("retry_policy_0_codes"))
+          .setRetrySettings(RETRY_PARAM_DEFINITIONS.get("retry_policy_0_params"));
+
+      builder
+          .deleteProductSettings()
+          .setRetryableCodes(RETRYABLE_CODE_DEFINITIONS.get("retry_policy_0_codes"))
+          .setRetrySettings(RETRY_PARAM_DEFINITIONS.get("retry_policy_0_params"));
+
+      builder
+          .importProductsSettings()
+          .setRetryableCodes(RETRYABLE_CODE_DEFINITIONS.get("retry_policy_0_codes"))
+          .setRetrySettings(RETRY_PARAM_DEFINITIONS.get("retry_policy_0_params"));
+
+      builder
+          .importProductsOperationSettings()
+          .setInitialCallSettings(
+              UnaryCallSettings
+                  .<ImportProductsRequest, OperationSnapshot>newUnaryCallSettingsBuilder()
+                  .setRetryableCodes(RETRYABLE_CODE_DEFINITIONS.get("retry_policy_0_codes"))
+                  .setRetrySettings(RETRY_PARAM_DEFINITIONS.get("retry_policy_0_params"))
+                  .build())
+          .setResponseTransformer(
+              ProtoOperationTransformers.ResponseTransformer.create(ImportProductsResponse.class))
+          .setMetadataTransformer(
+              ProtoOperationTransformers.MetadataTransformer.create(ImportMetadata.class))
+          .setPollingAlgorithm(
+              OperationTimedPollAlgorithm.create(
+                  RetrySettings.newBuilder()
+                      .setInitialRetryDelay(Duration.ofMillis(5000L))
+                      .setRetryDelayMultiplier(1.5)
+                      .setMaxRetryDelay(Duration.ofMillis(45000L))
+                      .setInitialRpcTimeout(Duration.ZERO)
+                      .setRpcTimeoutMultiplier(1.0)
+                      .setMaxRpcTimeout(Duration.ZERO)
+                      .setTotalTimeout(Duration.ofMillis(300000L))
+                      .build()));
+
+      return builder;
+    }
+
+    // NEXT_MAJOR_VER: remove 'throws Exception'.
+    /**
+     * Applies the given settings updater function to all of the unary API methods in this service.
+     *
+     * <p>Note: This method does not support applying settings to streaming methods.
+     */
+    public Builder applyToAllUnaryMethods(
+        ApiFunction<UnaryCallSettings.Builder<?, ?>, Void> settingsUpdater) throws Exception {
+      super.applyToAllUnaryMethods(unaryMethodSettingsBuilders, settingsUpdater);
+      return this;
+    }
+
+    public ImmutableList<UnaryCallSettings.Builder<?, ?>> unaryMethodSettingsBuilders() {
+      return unaryMethodSettingsBuilders;
+    }
+
+    /** Returns the builder for the settings used for calls to createProduct. */
+    public UnaryCallSettings.Builder<CreateProductRequest, Product> createProductSettings() {
+      return createProductSettings;
+    }
+
+    /** Returns the builder for the settings used for calls to getProduct. */
+    public UnaryCallSettings.Builder<GetProductRequest, Product> getProductSettings() {
+      return getProductSettings;
+    }
+
+    /** Returns the builder for the settings used for calls to updateProduct. */
+    public UnaryCallSettings.Builder<UpdateProductRequest, Product> updateProductSettings() {
+      return updateProductSettings;
+    }
+
+    /** Returns the builder for the settings used for calls to deleteProduct. */
+    public UnaryCallSettings.Builder<DeleteProductRequest, Empty> deleteProductSettings() {
+      return deleteProductSettings;
+    }
+
+    /** Returns the builder for the settings used for calls to importProducts. */
+    public UnaryCallSettings.Builder<ImportProductsRequest, Operation> importProductsSettings() {
+      return importProductsSettings;
+    }
+
+    /** Returns the builder for the settings used for calls to importProducts. */
+    @BetaApi(
+        "The surface for use by generated code is not stable yet and may change in the future.")
+    public OperationCallSettings.Builder<
+            ImportProductsRequest, ImportProductsResponse, ImportMetadata>
+        importProductsOperationSettings() {
+      return importProductsOperationSettings;
+    }
+
+    @Override
+    public ProductServiceStubSettings build() throws IOException {
+      return new ProductServiceStubSettings(this);
+    }
+  }
+}
diff --git a/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/stub/UserEventServiceStub.java b/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/stub/UserEventServiceStub.java
new file mode 100644
index 00000000..7bbd8348
--- /dev/null
+++ b/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/stub/UserEventServiceStub.java
@@ -0,0 +1,90 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.cloud.retail.v2.stub;
+
+import com.google.api.HttpBody;
+import com.google.api.gax.core.BackgroundResource;
+import com.google.api.gax.rpc.OperationCallable;
+import com.google.api.gax.rpc.UnaryCallable;
+import com.google.cloud.retail.v2.CollectUserEventRequest;
+import com.google.cloud.retail.v2.ImportMetadata;
+import com.google.cloud.retail.v2.ImportUserEventsRequest;
+import com.google.cloud.retail.v2.ImportUserEventsResponse;
+import com.google.cloud.retail.v2.PurgeMetadata;
+import com.google.cloud.retail.v2.PurgeUserEventsRequest;
+import com.google.cloud.retail.v2.PurgeUserEventsResponse;
+import com.google.cloud.retail.v2.RejoinUserEventsMetadata;
+import com.google.cloud.retail.v2.RejoinUserEventsRequest;
+import com.google.cloud.retail.v2.RejoinUserEventsResponse;
+import com.google.cloud.retail.v2.UserEvent;
+import com.google.cloud.retail.v2.WriteUserEventRequest;
+import com.google.longrunning.Operation;
+import com.google.longrunning.stub.OperationsStub;
+import javax.annotation.Generated;
+
+// AUTO-GENERATED DOCUMENTATION AND CLASS.
+/**
+ * Base stub class for the UserEventService service API.
+ *
+ * <p>This class is for advanced usage and reflects the underlying API directly.
+ */
+@Generated("by gapic-generator")
+public abstract class UserEventServiceStub implements BackgroundResource {
+
+  public OperationsStub getOperationsStub() {
+    throw new UnsupportedOperationException("Not implemented: getOperationsStub()");
+  }
+
+  public UnaryCallable<WriteUserEventRequest, UserEvent> writeUserEventCallable() {
+    throw new UnsupportedOperationException("Not implemented: writeUserEventCallable()");
+  }
+
+  public UnaryCallable<CollectUserEventRequest, HttpBody> collectUserEventCallable() {
+    throw new UnsupportedOperationException("Not implemented: collectUserEventCallable()");
+  }
+
+  public OperationCallable<PurgeUserEventsRequest, PurgeUserEventsResponse, PurgeMetadata>
+      purgeUserEventsOperationCallable() {
+    throw new UnsupportedOperationException("Not implemented: purgeUserEventsOperationCallable()");
+  }
+
+  public UnaryCallable<PurgeUserEventsRequest, Operation> purgeUserEventsCallable() {
+    throw new UnsupportedOperationException("Not implemented: purgeUserEventsCallable()");
+  }
+
+  public OperationCallable<ImportUserEventsRequest, ImportUserEventsResponse, ImportMetadata>
+      importUserEventsOperationCallable() {
+    throw new UnsupportedOperationException("Not implemented: importUserEventsOperationCallable()");
+  }
+
+  public UnaryCallable<ImportUserEventsRequest, Operation> importUserEventsCallable() {
+    throw new UnsupportedOperationException("Not implemented: importUserEventsCallable()");
+  }
+
+  public OperationCallable<
+          RejoinUserEventsRequest, RejoinUserEventsResponse, RejoinUserEventsMetadata>
+      rejoinUserEventsOperationCallable() {
+    throw new UnsupportedOperationException("Not implemented: rejoinUserEventsOperationCallable()");
+  }
+
+  public UnaryCallable<RejoinUserEventsRequest, Operation> rejoinUserEventsCallable() {
+    throw new UnsupportedOperationException("Not implemented: rejoinUserEventsCallable()");
+  }
+
+  @Override
+  public abstract void close();
+}
diff --git a/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/stub/UserEventServiceStubSettings.java b/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/stub/UserEventServiceStubSettings.java
new file mode 100644
index 00000000..71217d41
--- /dev/null
+++ b/google-cloud-retail/src/main/java/com/google/cloud/retail/v2/stub/UserEventServiceStubSettings.java
@@ -0,0 +1,527 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.cloud.retail.v2.stub;
+
+import com.google.api.HttpBody;
+import com.google.api.core.ApiFunction;
+import com.google.api.core.BetaApi;
+import com.google.api.gax.core.GaxProperties;
+import com.google.api.gax.core.GoogleCredentialsProvider;
+import com.google.api.gax.core.InstantiatingExecutorProvider;
+import com.google.api.gax.grpc.GaxGrpcProperties;
+import com.google.api.gax.grpc.GrpcTransportChannel;
+import com.google.api.gax.grpc.InstantiatingGrpcChannelProvider;
+import com.google.api.gax.grpc.ProtoOperationTransformers;
+import com.google.api.gax.longrunning.OperationSnapshot;
+import com.google.api.gax.longrunning.OperationTimedPollAlgorithm;
+import com.google.api.gax.retrying.RetrySettings;
+import com.google.api.gax.rpc.ApiClientHeaderProvider;
+import com.google.api.gax.rpc.ClientContext;
+import com.google.api.gax.rpc.OperationCallSettings;
+import com.google.api.gax.rpc.StatusCode;
+import com.google.api.gax.rpc.StubSettings;
+import com.google.api.gax.rpc.TransportChannelProvider;
+import com.google.api.gax.rpc.UnaryCallSettings;
+import com.google.cloud.retail.v2.CollectUserEventRequest;
+import com.google.cloud.retail.v2.ImportMetadata;
+import com.google.cloud.retail.v2.ImportUserEventsRequest;
+import com.google.cloud.retail.v2.ImportUserEventsResponse;
+import com.google.cloud.retail.v2.PurgeMetadata;
+import com.google.cloud.retail.v2.PurgeUserEventsRequest;
+import com.google.cloud.retail.v2.PurgeUserEventsResponse;
+import com.google.cloud.retail.v2.RejoinUserEventsMetadata;
+import com.google.cloud.retail.v2.RejoinUserEventsRequest;
+import com.google.cloud.retail.v2.RejoinUserEventsResponse;
+import com.google.cloud.retail.v2.UserEvent;
+import com.google.cloud.retail.v2.WriteUserEventRequest;
+import com.google.common.collect.ImmutableList;
+import com.google.common.collect.ImmutableMap;
+import com.google.common.collect.ImmutableSet;
+import com.google.common.collect.Lists;
+import com.google.longrunning.Operation;
+import java.io.IOException;
+import java.util.List;
+import javax.annotation.Generated;
+import org.threeten.bp.Duration;
+
+// AUTO-GENERATED DOCUMENTATION AND CLASS.
+/**
+ * Settings class to configure an instance of {@link UserEventServiceStub}.
+ *
+ * <p>The default instance has everything set to sensible defaults:
+ *
+ * <ul>
+ *   <li>The default service address (retail.googleapis.com) and default port (443) are used.
+ *   <li>Credentials are acquired automatically through Application Default Credentials.
+ *   <li>Retries are configured for idempotent methods but not for non-idempotent methods.
+ * </ul>
+ *
+ * <p>The builder of this class is recursive, so contained classes are themselves builders. When
+ * build() is called, the tree of builders is called to create the complete settings object.
+ *
+ * <p>For example, to set the total timeout of writeUserEvent to 30 seconds:
+ *
+ * <pre>{@code
+ * UserEventServiceStubSettings.Builder userEventServiceSettingsBuilder =
+ *     UserEventServiceStubSettings.newBuilder();
+ * userEventServiceSettingsBuilder
+ *     .writeUserEventSettings()
+ *     .setRetrySettings(
+ *         userEventServiceSettingsBuilder
+ *             .writeUserEventSettings()
+ *             .getRetrySettings()
+ *             .toBuilder()
+ *             .setTotalTimeout(Duration.ofSeconds(30))
+ *             .build());
+ * UserEventServiceStubSettings userEventServiceSettings = userEventServiceSettingsBuilder.build();
+ * }</pre>
+ */
+@BetaApi
+@Generated("by gapic-generator-java")
+public class UserEventServiceStubSettings extends StubSettings<UserEventServiceStubSettings> {
+  /** The default scopes of the service. */
+  private static final ImmutableList<String> DEFAULT_SERVICE_SCOPES =
+      ImmutableList.<String>builder().add("https://www.googleapis.com/auth/cloud-platform").build();
+
+  private final UnaryCallSettings<WriteUserEventRequest, UserEvent> writeUserEventSettings;
+  private final UnaryCallSettings<CollectUserEventRequest, HttpBody> collectUserEventSettings;
+  private final UnaryCallSettings<PurgeUserEventsRequest, Operation> purgeUserEventsSettings;
+  private final OperationCallSettings<
+          PurgeUserEventsRequest, PurgeUserEventsResponse, PurgeMetadata>
+      purgeUserEventsOperationSettings;
+  private final UnaryCallSettings<ImportUserEventsRequest, Operation> importUserEventsSettings;
+  private final OperationCallSettings<
+          ImportUserEventsRequest, ImportUserEventsResponse, ImportMetadata>
+      importUserEventsOperationSettings;
+  private final UnaryCallSettings<RejoinUserEventsRequest, Operation> rejoinUserEventsSettings;
+  private final OperationCallSettings<
+          RejoinUserEventsRequest, RejoinUserEventsResponse, RejoinUserEventsMetadata>
+      rejoinUserEventsOperationSettings;
+
+  /** Returns the object with the settings used for calls to writeUserEvent. */
+  public UnaryCallSettings<WriteUserEventRequest, UserEvent> writeUserEventSettings() {
+    return writeUserEventSettings;
+  }
+
+  /** Returns the object with the settings used for calls to collectUserEvent. */
+  public UnaryCallSettings<CollectUserEventRequest, HttpBody> collectUserEventSettings() {
+    return collectUserEventSettings;
+  }
+
+  /** Returns the object with the settings used for calls to purgeUserEvents. */
+  public UnaryCallSettings<PurgeUserEventsRequest, Operation> purgeUserEventsSettings() {
+    return purgeUserEventsSettings;
+  }
+
+  /** Returns the object with the settings used for calls to purgeUserEvents. */
+  public OperationCallSettings<PurgeUserEventsRequest, PurgeUserEventsResponse, PurgeMetadata>
+      purgeUserEventsOperationSettings() {
+    return purgeUserEventsOperationSettings;
+  }
+
+  /** Returns the object with the settings used for calls to importUserEvents. */
+  public UnaryCallSettings<ImportUserEventsRequest, Operation> importUserEventsSettings() {
+    return importUserEventsSettings;
+  }
+
+  /** Returns the object with the settings used for calls to importUserEvents. */
+  public OperationCallSettings<ImportUserEventsRequest, ImportUserEventsResponse, ImportMetadata>
+      importUserEventsOperationSettings() {
+    return importUserEventsOperationSettings;
+  }
+
+  /** Returns the object with the settings used for calls to rejoinUserEvents. */
+  public UnaryCallSettings<RejoinUserEventsRequest, Operation> rejoinUserEventsSettings() {
+    return rejoinUserEventsSettings;
+  }
+
+  /** Returns the object with the settings used for calls to rejoinUserEvents. */
+  public OperationCallSettings<
+          RejoinUserEventsRequest, RejoinUserEventsResponse, RejoinUserEventsMetadata>
+      rejoinUserEventsOperationSettings() {
+    return rejoinUserEventsOperationSettings;
+  }
+
+  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
+  public UserEventServiceStub createStub() throws IOException {
+    if (getTransportChannelProvider()
+        .getTransportName()
+        .equals(GrpcTransportChannel.getGrpcTransportName())) {
+      return GrpcUserEventServiceStub.create(this);
+    }
+    throw new UnsupportedOperationException(
+        String.format(
+            "Transport not supported: %s", getTransportChannelProvider().getTransportName()));
+  }
+
+  /** Returns a builder for the default ExecutorProvider for this service. */
+  public static InstantiatingExecutorProvider.Builder defaultExecutorProviderBuilder() {
+    return InstantiatingExecutorProvider.newBuilder();
+  }
+
+  /** Returns the default service endpoint. */
+  public static String getDefaultEndpoint() {
+    return "retail.googleapis.com:443";
+  }
+
+  /** Returns the default service scopes. */
+  public static List<String> getDefaultServiceScopes() {
+    return DEFAULT_SERVICE_SCOPES;
+  }
+
+  /** Returns a builder for the default credentials for this service. */
+  public static GoogleCredentialsProvider.Builder defaultCredentialsProviderBuilder() {
+    return GoogleCredentialsProvider.newBuilder().setScopesToApply(DEFAULT_SERVICE_SCOPES);
+  }
+
+  /** Returns a builder for the default ChannelProvider for this service. */
+  public static InstantiatingGrpcChannelProvider.Builder defaultGrpcTransportProviderBuilder() {
+    return InstantiatingGrpcChannelProvider.newBuilder()
+        .setMaxInboundMessageSize(Integer.MAX_VALUE);
+  }
+
+  public static TransportChannelProvider defaultTransportChannelProvider() {
+    return defaultGrpcTransportProviderBuilder().build();
+  }
+
+  @BetaApi("The surface for customizing headers is not stable yet and may change in the future.")
+  public static ApiClientHeaderProvider.Builder defaultApiClientHeaderProviderBuilder() {
+    return ApiClientHeaderProvider.newBuilder()
+        .setGeneratedLibToken(
+            "gapic", GaxProperties.getLibraryVersion(UserEventServiceStubSettings.class))
+        .setTransportToken(
+            GaxGrpcProperties.getGrpcTokenName(), GaxGrpcProperties.getGrpcVersion());
+  }
+
+  /** Returns a new builder for this class. */
+  public static Builder newBuilder() {
+    return Builder.createDefault();
+  }
+
+  /** Returns a new builder for this class. */
+  public static Builder newBuilder(ClientContext clientContext) {
+    return new Builder(clientContext);
+  }
+
+  /** Returns a builder containing all the values of this settings class. */
+  public Builder toBuilder() {
+    return new Builder(this);
+  }
+
+  protected UserEventServiceStubSettings(Builder settingsBuilder) throws IOException {
+    super(settingsBuilder);
+
+    writeUserEventSettings = settingsBuilder.writeUserEventSettings().build();
+    collectUserEventSettings = settingsBuilder.collectUserEventSettings().build();
+    purgeUserEventsSettings = settingsBuilder.purgeUserEventsSettings().build();
+    purgeUserEventsOperationSettings = settingsBuilder.purgeUserEventsOperationSettings().build();
+    importUserEventsSettings = settingsBuilder.importUserEventsSettings().build();
+    importUserEventsOperationSettings = settingsBuilder.importUserEventsOperationSettings().build();
+    rejoinUserEventsSettings = settingsBuilder.rejoinUserEventsSettings().build();
+    rejoinUserEventsOperationSettings = settingsBuilder.rejoinUserEventsOperationSettings().build();
+  }
+
+  /** Builder for UserEventServiceStubSettings. */
+  public static class Builder extends StubSettings.Builder<UserEventServiceStubSettings, Builder> {
+    private final ImmutableList<UnaryCallSettings.Builder<?, ?>> unaryMethodSettingsBuilders;
+    private final UnaryCallSettings.Builder<WriteUserEventRequest, UserEvent>
+        writeUserEventSettings;
+    private final UnaryCallSettings.Builder<CollectUserEventRequest, HttpBody>
+        collectUserEventSettings;
+    private final UnaryCallSettings.Builder<PurgeUserEventsRequest, Operation>
+        purgeUserEventsSettings;
+    private final OperationCallSettings.Builder<
+            PurgeUserEventsRequest, PurgeUserEventsResponse, PurgeMetadata>
+        purgeUserEventsOperationSettings;
+    private final UnaryCallSettings.Builder<ImportUserEventsRequest, Operation>
+        importUserEventsSettings;
+    private final OperationCallSettings.Builder<
+            ImportUserEventsRequest, ImportUserEventsResponse, ImportMetadata>
+        importUserEventsOperationSettings;
+    private final UnaryCallSettings.Builder<RejoinUserEventsRequest, Operation>
+        rejoinUserEventsSettings;
+    private final OperationCallSettings.Builder<
+            RejoinUserEventsRequest, RejoinUserEventsResponse, RejoinUserEventsMetadata>
+        rejoinUserEventsOperationSettings;
+    private static final ImmutableMap<String, ImmutableSet<StatusCode.Code>>
+        RETRYABLE_CODE_DEFINITIONS;
+
+    static {
+      ImmutableMap.Builder<String, ImmutableSet<StatusCode.Code>> definitions =
+          ImmutableMap.builder();
+      definitions.put(
+          "retry_policy_0_codes",
+          ImmutableSet.copyOf(
+              Lists.<StatusCode.Code>newArrayList(
+                  StatusCode.Code.UNAVAILABLE, StatusCode.Code.DEADLINE_EXCEEDED)));
+      RETRYABLE_CODE_DEFINITIONS = definitions.build();
+    }
+
+    private static final ImmutableMap<String, RetrySettings> RETRY_PARAM_DEFINITIONS;
+
+    static {
+      ImmutableMap.Builder<String, RetrySettings> definitions = ImmutableMap.builder();
+      RetrySettings settings = null;
+      settings =
+          RetrySettings.newBuilder()
+              .setInitialRetryDelay(Duration.ofMillis(100L))
+              .setRetryDelayMultiplier(1.3)
+              .setMaxRetryDelay(Duration.ofMillis(60000L))
+              .setInitialRpcTimeout(Duration.ofMillis(60000L))
+              .setRpcTimeoutMultiplier(1.0)
+              .setMaxRpcTimeout(Duration.ofMillis(60000L))
+              .setTotalTimeout(Duration.ofMillis(60000L))
+              .build();
+      definitions.put("retry_policy_0_params", settings);
+      RETRY_PARAM_DEFINITIONS = definitions.build();
+    }
+
+    protected Builder() {
+      this(((ClientContext) null));
+    }
+
+    protected Builder(ClientContext clientContext) {
+      super(clientContext);
+
+      writeUserEventSettings = UnaryCallSettings.newUnaryCallSettingsBuilder();
+      collectUserEventSettings = UnaryCallSettings.newUnaryCallSettingsBuilder();
+      purgeUserEventsSettings = UnaryCallSettings.newUnaryCallSettingsBuilder();
+      purgeUserEventsOperationSettings = OperationCallSettings.newBuilder();
+      importUserEventsSettings = UnaryCallSettings.newUnaryCallSettingsBuilder();
+      importUserEventsOperationSettings = OperationCallSettings.newBuilder();
+      rejoinUserEventsSettings = UnaryCallSettings.newUnaryCallSettingsBuilder();
+      rejoinUserEventsOperationSettings = OperationCallSettings.newBuilder();
+
+      unaryMethodSettingsBuilders =
+          ImmutableList.<UnaryCallSettings.Builder<?, ?>>of(
+              writeUserEventSettings,
+              collectUserEventSettings,
+              purgeUserEventsSettings,
+              importUserEventsSettings,
+              rejoinUserEventsSettings);
+      initDefaults(this);
+    }
+
+    protected Builder(UserEventServiceStubSettings settings) {
+      super(settings);
+
+      writeUserEventSettings = settings.writeUserEventSettings.toBuilder();
+      collectUserEventSettings = settings.collectUserEventSettings.toBuilder();
+      purgeUserEventsSettings = settings.purgeUserEventsSettings.toBuilder();
+      purgeUserEventsOperationSettings = settings.purgeUserEventsOperationSettings.toBuilder();
+      importUserEventsSettings = settings.importUserEventsSettings.toBuilder();
+      importUserEventsOperationSettings = settings.importUserEventsOperationSettings.toBuilder();
+      rejoinUserEventsSettings = settings.rejoinUserEventsSettings.toBuilder();
+      rejoinUserEventsOperationSettings = settings.rejoinUserEventsOperationSettings.toBuilder();
+
+      unaryMethodSettingsBuilders =
+          ImmutableList.<UnaryCallSettings.Builder<?, ?>>of(
+              writeUserEventSettings,
+              collectUserEventSettings,
+              purgeUserEventsSettings,
+              importUserEventsSettings,
+              rejoinUserEventsSettings);
+    }
+
+    private static Builder createDefault() {
+      Builder builder = new Builder(((ClientContext) null));
+
+      builder.setTransportChannelProvider(defaultTransportChannelProvider());
+      builder.setCredentialsProvider(defaultCredentialsProviderBuilder().build());
+      builder.setInternalHeaderProvider(defaultApiClientHeaderProviderBuilder().build());
+      builder.setEndpoint(getDefaultEndpoint());
+
+      return initDefaults(builder);
+    }
+
+    private static Builder initDefaults(Builder builder) {
+      builder
+          .writeUserEventSettings()
+          .setRetryableCodes(RETRYABLE_CODE_DEFINITIONS.get("retry_policy_0_codes"))
+          .setRetrySettings(RETRY_PARAM_DEFINITIONS.get("retry_policy_0_params"));
+
+      builder
+          .collectUserEventSettings()
+          .setRetryableCodes(RETRYABLE_CODE_DEFINITIONS.get("retry_policy_0_codes"))
+          .setRetrySettings(RETRY_PARAM_DEFINITIONS.get("retry_policy_0_params"));
+
+      builder
+          .purgeUserEventsSettings()
+          .setRetryableCodes(RETRYABLE_CODE_DEFINITIONS.get("retry_policy_0_codes"))
+          .setRetrySettings(RETRY_PARAM_DEFINITIONS.get("retry_policy_0_params"));
+
+      builder
+          .importUserEventsSettings()
+          .setRetryableCodes(RETRYABLE_CODE_DEFINITIONS.get("retry_policy_0_codes"))
+          .setRetrySettings(RETRY_PARAM_DEFINITIONS.get("retry_policy_0_params"));
+
+      builder
+          .rejoinUserEventsSettings()
+          .setRetryableCodes(RETRYABLE_CODE_DEFINITIONS.get("retry_policy_0_codes"))
+          .setRetrySettings(RETRY_PARAM_DEFINITIONS.get("retry_policy_0_params"));
+
+      builder
+          .purgeUserEventsOperationSettings()
+          .setInitialCallSettings(
+              UnaryCallSettings
+                  .<PurgeUserEventsRequest, OperationSnapshot>newUnaryCallSettingsBuilder()
+                  .setRetryableCodes(RETRYABLE_CODE_DEFINITIONS.get("retry_policy_0_codes"))
+                  .setRetrySettings(RETRY_PARAM_DEFINITIONS.get("retry_policy_0_params"))
+                  .build())
+          .setResponseTransformer(
+              ProtoOperationTransformers.ResponseTransformer.create(PurgeUserEventsResponse.class))
+          .setMetadataTransformer(
+              ProtoOperationTransformers.MetadataTransformer.create(PurgeMetadata.class))
+          .setPollingAlgorithm(
+              OperationTimedPollAlgorithm.create(
+                  RetrySettings.newBuilder()
+                      .setInitialRetryDelay(Duration.ofMillis(5000L))
+                      .setRetryDelayMultiplier(1.5)
+                      .setMaxRetryDelay(Duration.ofMillis(45000L))
+                      .setInitialRpcTimeout(Duration.ZERO)
+                      .setRpcTimeoutMultiplier(1.0)
+                      .setMaxRpcTimeout(Duration.ZERO)
+                      .setTotalTimeout(Duration.ofMillis(300000L))
+                      .build()));
+
+      builder
+          .importUserEventsOperationSettings()
+          .setInitialCallSettings(
+              UnaryCallSettings
+                  .<ImportUserEventsRequest, OperationSnapshot>newUnaryCallSettingsBuilder()
+                  .setRetryableCodes(RETRYABLE_CODE_DEFINITIONS.get("retry_policy_0_codes"))
+                  .setRetrySettings(RETRY_PARAM_DEFINITIONS.get("retry_policy_0_params"))
+                  .build())
+          .setResponseTransformer(
+              ProtoOperationTransformers.ResponseTransformer.create(ImportUserEventsResponse.class))
+          .setMetadataTransformer(
+              ProtoOperationTransformers.MetadataTransformer.create(ImportMetadata.class))
+          .setPollingAlgorithm(
+              OperationTimedPollAlgorithm.create(
+                  RetrySettings.newBuilder()
+                      .setInitialRetryDelay(Duration.ofMillis(5000L))
+                      .setRetryDelayMultiplier(1.5)
+                      .setMaxRetryDelay(Duration.ofMillis(45000L))
+                      .setInitialRpcTimeout(Duration.ZERO)
+                      .setRpcTimeoutMultiplier(1.0)
+                      .setMaxRpcTimeout(Duration.ZERO)
+                      .setTotalTimeout(Duration.ofMillis(300000L))
+                      .build()));
+
+      builder
+          .rejoinUserEventsOperationSettings()
+          .setInitialCallSettings(
+              UnaryCallSettings
+                  .<RejoinUserEventsRequest, OperationSnapshot>newUnaryCallSettingsBuilder()
+                  .setRetryableCodes(RETRYABLE_CODE_DEFINITIONS.get("retry_policy_0_codes"))
+                  .setRetrySettings(RETRY_PARAM_DEFINITIONS.get("retry_policy_0_params"))
+                  .build())
+          .setResponseTransformer(
+              ProtoOperationTransformers.ResponseTransformer.create(RejoinUserEventsResponse.class))
+          .setMetadataTransformer(
+              ProtoOperationTransformers.MetadataTransformer.create(RejoinUserEventsMetadata.class))
+          .setPollingAlgorithm(
+              OperationTimedPollAlgorithm.create(
+                  RetrySettings.newBuilder()
+                      .setInitialRetryDelay(Duration.ofMillis(5000L))
+                      .setRetryDelayMultiplier(1.5)
+                      .setMaxRetryDelay(Duration.ofMillis(45000L))
+                      .setInitialRpcTimeout(Duration.ZERO)
+                      .setRpcTimeoutMultiplier(1.0)
+                      .setMaxRpcTimeout(Duration.ZERO)
+                      .setTotalTimeout(Duration.ofMillis(300000L))
+                      .build()));
+
+      return builder;
+    }
+
+    // NEXT_MAJOR_VER: remove 'throws Exception'.
+    /**
+     * Applies the given settings updater function to all of the unary API methods in this service.
+     *
+     * <p>Note: This method does not support applying settings to streaming methods.
+     */
+    public Builder applyToAllUnaryMethods(
+        ApiFunction<UnaryCallSettings.Builder<?, ?>, Void> settingsUpdater) throws Exception {
+      super.applyToAllUnaryMethods(unaryMethodSettingsBuilders, settingsUpdater);
+      return this;
+    }
+
+    public ImmutableList<UnaryCallSettings.Builder<?, ?>> unaryMethodSettingsBuilders() {
+      return unaryMethodSettingsBuilders;
+    }
+
+    /** Returns the builder for the settings used for calls to writeUserEvent. */
+    public UnaryCallSettings.Builder<WriteUserEventRequest, UserEvent> writeUserEventSettings() {
+      return writeUserEventSettings;
+    }
+
+    /** Returns the builder for the settings used for calls to collectUserEvent. */
+    public UnaryCallSettings.Builder<CollectUserEventRequest, HttpBody> collectUserEventSettings() {
+      return collectUserEventSettings;
+    }
+
+    /** Returns the builder for the settings used for calls to purgeUserEvents. */
+    public UnaryCallSettings.Builder<PurgeUserEventsRequest, Operation> purgeUserEventsSettings() {
+      return purgeUserEventsSettings;
+    }
+
+    /** Returns the builder for the settings used for calls to purgeUserEvents. */
+    @BetaApi(
+        "The surface for use by generated code is not stable yet and may change in the future.")
+    public OperationCallSettings.Builder<
+            PurgeUserEventsRequest, PurgeUserEventsResponse, PurgeMetadata>
+        purgeUserEventsOperationSettings() {
+      return purgeUserEventsOperationSettings;
+    }
+
+    /** Returns the builder for the settings used for calls to importUserEvents. */
+    public UnaryCallSettings.Builder<ImportUserEventsRequest, Operation>
+        importUserEventsSettings() {
+      return importUserEventsSettings;
+    }
+
+    /** Returns the builder for the settings used for calls to importUserEvents. */
+    @BetaApi(
+        "The surface for use by generated code is not stable yet and may change in the future.")
+    public OperationCallSettings.Builder<
+            ImportUserEventsRequest, ImportUserEventsResponse, ImportMetadata>
+        importUserEventsOperationSettings() {
+      return importUserEventsOperationSettings;
+    }
+
+    /** Returns the builder for the settings used for calls to rejoinUserEvents. */
+    public UnaryCallSettings.Builder<RejoinUserEventsRequest, Operation>
+        rejoinUserEventsSettings() {
+      return rejoinUserEventsSettings;
+    }
+
+    /** Returns the builder for the settings used for calls to rejoinUserEvents. */
+    @BetaApi(
+        "The surface for use by generated code is not stable yet and may change in the future.")
+    public OperationCallSettings.Builder<
+            RejoinUserEventsRequest, RejoinUserEventsResponse, RejoinUserEventsMetadata>
+        rejoinUserEventsOperationSettings() {
+      return rejoinUserEventsOperationSettings;
+    }
+
+    @Override
+    public UserEventServiceStubSettings build() throws IOException {
+      return new UserEventServiceStubSettings(this);
+    }
+  }
+}
diff --git a/google-cloud-retail/src/test/java/com/google/cloud/retail/v2/CatalogServiceClientTest.java b/google-cloud-retail/src/test/java/com/google/cloud/retail/v2/CatalogServiceClientTest.java
new file mode 100644
index 00000000..ce5d1be6
--- /dev/null
+++ b/google-cloud-retail/src/test/java/com/google/cloud/retail/v2/CatalogServiceClientTest.java
@@ -0,0 +1,212 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.cloud.retail.v2;
+
+import static com.google.cloud.retail.v2.CatalogServiceClient.ListCatalogsPagedResponse;
+
+import com.google.api.gax.core.NoCredentialsProvider;
+import com.google.api.gax.grpc.GaxGrpcProperties;
+import com.google.api.gax.grpc.testing.LocalChannelProvider;
+import com.google.api.gax.grpc.testing.MockGrpcService;
+import com.google.api.gax.grpc.testing.MockServiceHelper;
+import com.google.api.gax.rpc.ApiClientHeaderProvider;
+import com.google.api.gax.rpc.InvalidArgumentException;
+import com.google.common.collect.Lists;
+import com.google.protobuf.AbstractMessage;
+import com.google.protobuf.FieldMask;
+import io.grpc.StatusRuntimeException;
+import java.io.IOException;
+import java.util.Arrays;
+import java.util.List;
+import java.util.UUID;
+import javax.annotation.Generated;
+import org.junit.After;
+import org.junit.AfterClass;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+@Generated("by gapic-generator-java")
+public class CatalogServiceClientTest {
+  private static MockCatalogService mockCatalogService;
+  private static MockServiceHelper mockServiceHelper;
+  private CatalogServiceClient client;
+  private LocalChannelProvider channelProvider;
+
+  @BeforeClass
+  public static void startStaticServer() {
+    mockCatalogService = new MockCatalogService();
+    mockServiceHelper =
+        new MockServiceHelper(
+            UUID.randomUUID().toString(), Arrays.<MockGrpcService>asList(mockCatalogService));
+    mockServiceHelper.start();
+  }
+
+  @AfterClass
+  public static void stopServer() {
+    mockServiceHelper.stop();
+  }
+
+  @Before
+  public void setUp() throws IOException {
+    mockServiceHelper.reset();
+    channelProvider = mockServiceHelper.createChannelProvider();
+    CatalogServiceSettings settings =
+        CatalogServiceSettings.newBuilder()
+            .setTransportChannelProvider(channelProvider)
+            .setCredentialsProvider(NoCredentialsProvider.create())
+            .build();
+    client = CatalogServiceClient.create(settings);
+  }
+
+  @After
+  public void tearDown() throws Exception {
+    client.close();
+  }
+
+  @Test
+  public void listCatalogsTest() throws Exception {
+    Catalog responsesElement = Catalog.newBuilder().build();
+    ListCatalogsResponse expectedResponse =
+        ListCatalogsResponse.newBuilder()
+            .setNextPageToken("")
+            .addAllCatalogs(Arrays.asList(responsesElement))
+            .build();
+    mockCatalogService.addResponse(expectedResponse);
+
+    LocationName parent = LocationName.of("[PROJECT]", "[LOCATION]");
+
+    ListCatalogsPagedResponse pagedListResponse = client.listCatalogs(parent);
+
+    List<Catalog> resources = Lists.newArrayList(pagedListResponse.iterateAll());
+
+    Assert.assertEquals(1, resources.size());
+    Assert.assertEquals(expectedResponse.getCatalogsList().get(0), resources.get(0));
+
+    List<AbstractMessage> actualRequests = mockCatalogService.getRequests();
+    Assert.assertEquals(1, actualRequests.size());
+    ListCatalogsRequest actualRequest = ((ListCatalogsRequest) actualRequests.get(0));
+
+    Assert.assertEquals(parent.toString(), actualRequest.getParent());
+    Assert.assertTrue(
+        channelProvider.isHeaderSent(
+            ApiClientHeaderProvider.getDefaultApiClientHeaderKey(),
+            GaxGrpcProperties.getDefaultApiClientHeaderPattern()));
+  }
+
+  @Test
+  public void listCatalogsExceptionTest() throws Exception {
+    StatusRuntimeException exception = new StatusRuntimeException(io.grpc.Status.INVALID_ARGUMENT);
+    mockCatalogService.addException(exception);
+
+    try {
+      LocationName parent = LocationName.of("[PROJECT]", "[LOCATION]");
+      client.listCatalogs(parent);
+      Assert.fail("No exception raised");
+    } catch (InvalidArgumentException e) {
+      // Expected exception.
+    }
+  }
+
+  @Test
+  public void listCatalogsTest2() throws Exception {
+    Catalog responsesElement = Catalog.newBuilder().build();
+    ListCatalogsResponse expectedResponse =
+        ListCatalogsResponse.newBuilder()
+            .setNextPageToken("")
+            .addAllCatalogs(Arrays.asList(responsesElement))
+            .build();
+    mockCatalogService.addResponse(expectedResponse);
+
+    String parent = "parent-995424086";
+
+    ListCatalogsPagedResponse pagedListResponse = client.listCatalogs(parent);
+
+    List<Catalog> resources = Lists.newArrayList(pagedListResponse.iterateAll());
+
+    Assert.assertEquals(1, resources.size());
+    Assert.assertEquals(expectedResponse.getCatalogsList().get(0), resources.get(0));
+
+    List<AbstractMessage> actualRequests = mockCatalogService.getRequests();
+    Assert.assertEquals(1, actualRequests.size());
+    ListCatalogsRequest actualRequest = ((ListCatalogsRequest) actualRequests.get(0));
+
+    Assert.assertEquals(parent, actualRequest.getParent());
+    Assert.assertTrue(
+        channelProvider.isHeaderSent(
+            ApiClientHeaderProvider.getDefaultApiClientHeaderKey(),
+            GaxGrpcProperties.getDefaultApiClientHeaderPattern()));
+  }
+
+  @Test
+  public void listCatalogsExceptionTest2() throws Exception {
+    StatusRuntimeException exception = new StatusRuntimeException(io.grpc.Status.INVALID_ARGUMENT);
+    mockCatalogService.addException(exception);
+
+    try {
+      String parent = "parent-995424086";
+      client.listCatalogs(parent);
+      Assert.fail("No exception raised");
+    } catch (InvalidArgumentException e) {
+      // Expected exception.
+    }
+  }
+
+  @Test
+  public void updateCatalogTest() throws Exception {
+    Catalog expectedResponse =
+        Catalog.newBuilder()
+            .setName("name3373707")
+            .setDisplayName("displayName1714148973")
+            .setProductLevelConfig(ProductLevelConfig.newBuilder().build())
+            .build();
+    mockCatalogService.addResponse(expectedResponse);
+
+    Catalog catalog = Catalog.newBuilder().build();
+    FieldMask updateMask = FieldMask.newBuilder().build();
+
+    Catalog actualResponse = client.updateCatalog(catalog, updateMask);
+    Assert.assertEquals(expectedResponse, actualResponse);
+
+    List<AbstractMessage> actualRequests = mockCatalogService.getRequests();
+    Assert.assertEquals(1, actualRequests.size());
+    UpdateCatalogRequest actualRequest = ((UpdateCatalogRequest) actualRequests.get(0));
+
+    Assert.assertEquals(catalog, actualRequest.getCatalog());
+    Assert.assertEquals(updateMask, actualRequest.getUpdateMask());
+    Assert.assertTrue(
+        channelProvider.isHeaderSent(
+            ApiClientHeaderProvider.getDefaultApiClientHeaderKey(),
+            GaxGrpcProperties.getDefaultApiClientHeaderPattern()));
+  }
+
+  @Test
+  public void updateCatalogExceptionTest() throws Exception {
+    StatusRuntimeException exception = new StatusRuntimeException(io.grpc.Status.INVALID_ARGUMENT);
+    mockCatalogService.addException(exception);
+
+    try {
+      Catalog catalog = Catalog.newBuilder().build();
+      FieldMask updateMask = FieldMask.newBuilder().build();
+      client.updateCatalog(catalog, updateMask);
+      Assert.fail("No exception raised");
+    } catch (InvalidArgumentException e) {
+      // Expected exception.
+    }
+  }
+}
diff --git a/google-cloud-retail/src/test/java/com/google/cloud/retail/v2/MockCatalogService.java b/google-cloud-retail/src/test/java/com/google/cloud/retail/v2/MockCatalogService.java
new file mode 100644
index 00000000..9ec863cb
--- /dev/null
+++ b/google-cloud-retail/src/test/java/com/google/cloud/retail/v2/MockCatalogService.java
@@ -0,0 +1,59 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.cloud.retail.v2;
+
+import com.google.api.core.BetaApi;
+import com.google.api.gax.grpc.testing.MockGrpcService;
+import com.google.protobuf.AbstractMessage;
+import io.grpc.ServerServiceDefinition;
+import java.util.List;
+import javax.annotation.Generated;
+
+@BetaApi
+@Generated("by gapic-generator-java")
+public class MockCatalogService implements MockGrpcService {
+  private final MockCatalogServiceImpl serviceImpl;
+
+  public MockCatalogService() {
+    serviceImpl = new MockCatalogServiceImpl();
+  }
+
+  @Override
+  public List<AbstractMessage> getRequests() {
+    return serviceImpl.getRequests();
+  }
+
+  @Override
+  public void addResponse(AbstractMessage response) {
+    serviceImpl.addResponse(response);
+  }
+
+  @Override
+  public void addException(Exception exception) {
+    serviceImpl.addException(exception);
+  }
+
+  @Override
+  public ServerServiceDefinition getServiceDefinition() {
+    return serviceImpl.bindService();
+  }
+
+  @Override
+  public void reset() {
+    serviceImpl.reset();
+  }
+}
diff --git a/google-cloud-retail/src/test/java/com/google/cloud/retail/v2/MockCatalogServiceImpl.java b/google-cloud-retail/src/test/java/com/google/cloud/retail/v2/MockCatalogServiceImpl.java
new file mode 100644
index 00000000..f9f421b9
--- /dev/null
+++ b/google-cloud-retail/src/test/java/com/google/cloud/retail/v2/MockCatalogServiceImpl.java
@@ -0,0 +1,90 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.cloud.retail.v2;
+
+import com.google.api.core.BetaApi;
+import com.google.cloud.retail.v2.CatalogServiceGrpc.CatalogServiceImplBase;
+import com.google.protobuf.AbstractMessage;
+import io.grpc.stub.StreamObserver;
+import java.util.ArrayList;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Queue;
+import javax.annotation.Generated;
+
+@BetaApi
+@Generated("by gapic-generator-java")
+public class MockCatalogServiceImpl extends CatalogServiceImplBase {
+  private List<AbstractMessage> requests;
+  private Queue<Object> responses;
+
+  public MockCatalogServiceImpl() {
+    requests = new ArrayList<>();
+    responses = new LinkedList<>();
+  }
+
+  public List<AbstractMessage> getRequests() {
+    return requests;
+  }
+
+  public void addResponse(AbstractMessage response) {
+    responses.add(response);
+  }
+
+  public void setResponses(List<AbstractMessage> responses) {
+    this.responses = new LinkedList<Object>(responses);
+  }
+
+  public void addException(Exception exception) {
+    responses.add(exception);
+  }
+
+  public void reset() {
+    requests = new ArrayList<>();
+    responses = new LinkedList<>();
+  }
+
+  @Override
+  public void listCatalogs(
+      ListCatalogsRequest request, StreamObserver<ListCatalogsResponse> responseObserver) {
+    Object response = responses.remove();
+    if (response instanceof ListCatalogsResponse) {
+      requests.add(request);
+      responseObserver.onNext(((ListCatalogsResponse) response));
+      responseObserver.onCompleted();
+    } else if (response instanceof Exception) {
+      responseObserver.onError(((Exception) response));
+    } else {
+      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
+    }
+  }
+
+  @Override
+  public void updateCatalog(
+      UpdateCatalogRequest request, StreamObserver<Catalog> responseObserver) {
+    Object response = responses.remove();
+    if (response instanceof Catalog) {
+      requests.add(request);
+      responseObserver.onNext(((Catalog) response));
+      responseObserver.onCompleted();
+    } else if (response instanceof Exception) {
+      responseObserver.onError(((Exception) response));
+    } else {
+      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
+    }
+  }
+}
diff --git a/google-cloud-retail/src/test/java/com/google/cloud/retail/v2/MockPredictionService.java b/google-cloud-retail/src/test/java/com/google/cloud/retail/v2/MockPredictionService.java
new file mode 100644
index 00000000..ad00ed7a
--- /dev/null
+++ b/google-cloud-retail/src/test/java/com/google/cloud/retail/v2/MockPredictionService.java
@@ -0,0 +1,59 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.cloud.retail.v2;
+
+import com.google.api.core.BetaApi;
+import com.google.api.gax.grpc.testing.MockGrpcService;
+import com.google.protobuf.AbstractMessage;
+import io.grpc.ServerServiceDefinition;
+import java.util.List;
+import javax.annotation.Generated;
+
+@BetaApi
+@Generated("by gapic-generator-java")
+public class MockPredictionService implements MockGrpcService {
+  private final MockPredictionServiceImpl serviceImpl;
+
+  public MockPredictionService() {
+    serviceImpl = new MockPredictionServiceImpl();
+  }
+
+  @Override
+  public List<AbstractMessage> getRequests() {
+    return serviceImpl.getRequests();
+  }
+
+  @Override
+  public void addResponse(AbstractMessage response) {
+    serviceImpl.addResponse(response);
+  }
+
+  @Override
+  public void addException(Exception exception) {
+    serviceImpl.addException(exception);
+  }
+
+  @Override
+  public ServerServiceDefinition getServiceDefinition() {
+    return serviceImpl.bindService();
+  }
+
+  @Override
+  public void reset() {
+    serviceImpl.reset();
+  }
+}
diff --git a/google-cloud-retail/src/test/java/com/google/cloud/retail/v2/MockPredictionServiceImpl.java b/google-cloud-retail/src/test/java/com/google/cloud/retail/v2/MockPredictionServiceImpl.java
new file mode 100644
index 00000000..6c627fe8
--- /dev/null
+++ b/google-cloud-retail/src/test/java/com/google/cloud/retail/v2/MockPredictionServiceImpl.java
@@ -0,0 +1,74 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.cloud.retail.v2;
+
+import com.google.api.core.BetaApi;
+import com.google.cloud.retail.v2.PredictionServiceGrpc.PredictionServiceImplBase;
+import com.google.protobuf.AbstractMessage;
+import io.grpc.stub.StreamObserver;
+import java.util.ArrayList;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Queue;
+import javax.annotation.Generated;
+
+@BetaApi
+@Generated("by gapic-generator-java")
+public class MockPredictionServiceImpl extends PredictionServiceImplBase {
+  private List<AbstractMessage> requests;
+  private Queue<Object> responses;
+
+  public MockPredictionServiceImpl() {
+    requests = new ArrayList<>();
+    responses = new LinkedList<>();
+  }
+
+  public List<AbstractMessage> getRequests() {
+    return requests;
+  }
+
+  public void addResponse(AbstractMessage response) {
+    responses.add(response);
+  }
+
+  public void setResponses(List<AbstractMessage> responses) {
+    this.responses = new LinkedList<Object>(responses);
+  }
+
+  public void addException(Exception exception) {
+    responses.add(exception);
+  }
+
+  public void reset() {
+    requests = new ArrayList<>();
+    responses = new LinkedList<>();
+  }
+
+  @Override
+  public void predict(PredictRequest request, StreamObserver<PredictResponse> responseObserver) {
+    Object response = responses.remove();
+    if (response instanceof PredictResponse) {
+      requests.add(request);
+      responseObserver.onNext(((PredictResponse) response));
+      responseObserver.onCompleted();
+    } else if (response instanceof Exception) {
+      responseObserver.onError(((Exception) response));
+    } else {
+      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
+    }
+  }
+}
diff --git a/google-cloud-retail/src/test/java/com/google/cloud/retail/v2/MockProductService.java b/google-cloud-retail/src/test/java/com/google/cloud/retail/v2/MockProductService.java
new file mode 100644
index 00000000..123af448
--- /dev/null
+++ b/google-cloud-retail/src/test/java/com/google/cloud/retail/v2/MockProductService.java
@@ -0,0 +1,59 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.cloud.retail.v2;
+
+import com.google.api.core.BetaApi;
+import com.google.api.gax.grpc.testing.MockGrpcService;
+import com.google.protobuf.AbstractMessage;
+import io.grpc.ServerServiceDefinition;
+import java.util.List;
+import javax.annotation.Generated;
+
+@BetaApi
+@Generated("by gapic-generator-java")
+public class MockProductService implements MockGrpcService {
+  private final MockProductServiceImpl serviceImpl;
+
+  public MockProductService() {
+    serviceImpl = new MockProductServiceImpl();
+  }
+
+  @Override
+  public List<AbstractMessage> getRequests() {
+    return serviceImpl.getRequests();
+  }
+
+  @Override
+  public void addResponse(AbstractMessage response) {
+    serviceImpl.addResponse(response);
+  }
+
+  @Override
+  public void addException(Exception exception) {
+    serviceImpl.addException(exception);
+  }
+
+  @Override
+  public ServerServiceDefinition getServiceDefinition() {
+    return serviceImpl.bindService();
+  }
+
+  @Override
+  public void reset() {
+    serviceImpl.reset();
+  }
+}
diff --git a/google-cloud-retail/src/test/java/com/google/cloud/retail/v2/MockProductServiceImpl.java b/google-cloud-retail/src/test/java/com/google/cloud/retail/v2/MockProductServiceImpl.java
new file mode 100644
index 00000000..54025bba
--- /dev/null
+++ b/google-cloud-retail/src/test/java/com/google/cloud/retail/v2/MockProductServiceImpl.java
@@ -0,0 +1,135 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.cloud.retail.v2;
+
+import com.google.api.core.BetaApi;
+import com.google.cloud.retail.v2.ProductServiceGrpc.ProductServiceImplBase;
+import com.google.longrunning.Operation;
+import com.google.protobuf.AbstractMessage;
+import com.google.protobuf.Empty;
+import io.grpc.stub.StreamObserver;
+import java.util.ArrayList;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Queue;
+import javax.annotation.Generated;
+
+@BetaApi
+@Generated("by gapic-generator-java")
+public class MockProductServiceImpl extends ProductServiceImplBase {
+  private List<AbstractMessage> requests;
+  private Queue<Object> responses;
+
+  public MockProductServiceImpl() {
+    requests = new ArrayList<>();
+    responses = new LinkedList<>();
+  }
+
+  public List<AbstractMessage> getRequests() {
+    return requests;
+  }
+
+  public void addResponse(AbstractMessage response) {
+    responses.add(response);
+  }
+
+  public void setResponses(List<AbstractMessage> responses) {
+    this.responses = new LinkedList<Object>(responses);
+  }
+
+  public void addException(Exception exception) {
+    responses.add(exception);
+  }
+
+  public void reset() {
+    requests = new ArrayList<>();
+    responses = new LinkedList<>();
+  }
+
+  @Override
+  public void createProduct(
+      CreateProductRequest request, StreamObserver<Product> responseObserver) {
+    Object response = responses.remove();
+    if (response instanceof Product) {
+      requests.add(request);
+      responseObserver.onNext(((Product) response));
+      responseObserver.onCompleted();
+    } else if (response instanceof Exception) {
+      responseObserver.onError(((Exception) response));
+    } else {
+      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
+    }
+  }
+
+  @Override
+  public void getProduct(GetProductRequest request, StreamObserver<Product> responseObserver) {
+    Object response = responses.remove();
+    if (response instanceof Product) {
+      requests.add(request);
+      responseObserver.onNext(((Product) response));
+      responseObserver.onCompleted();
+    } else if (response instanceof Exception) {
+      responseObserver.onError(((Exception) response));
+    } else {
+      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
+    }
+  }
+
+  @Override
+  public void updateProduct(
+      UpdateProductRequest request, StreamObserver<Product> responseObserver) {
+    Object response = responses.remove();
+    if (response instanceof Product) {
+      requests.add(request);
+      responseObserver.onNext(((Product) response));
+      responseObserver.onCompleted();
+    } else if (response instanceof Exception) {
+      responseObserver.onError(((Exception) response));
+    } else {
+      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
+    }
+  }
+
+  @Override
+  public void deleteProduct(DeleteProductRequest request, StreamObserver<Empty> responseObserver) {
+    Object response = responses.remove();
+    if (response instanceof Empty) {
+      requests.add(request);
+      responseObserver.onNext(((Empty) response));
+      responseObserver.onCompleted();
+    } else if (response instanceof Exception) {
+      responseObserver.onError(((Exception) response));
+    } else {
+      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
+    }
+  }
+
+  @Override
+  public void importProducts(
+      ImportProductsRequest request, StreamObserver<Operation> responseObserver) {
+    Object response = responses.remove();
+    if (response instanceof Operation) {
+      requests.add(request);
+      responseObserver.onNext(((Operation) response));
+      responseObserver.onCompleted();
+    } else if (response instanceof Exception) {
+      responseObserver.onError(((Exception) response));
+    } else {
+      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
+    }
+  }
+}
diff --git a/google-cloud-retail/src/test/java/com/google/cloud/retail/v2/MockUserEventService.java b/google-cloud-retail/src/test/java/com/google/cloud/retail/v2/MockUserEventService.java
new file mode 100644
index 00000000..6283da76
--- /dev/null
+++ b/google-cloud-retail/src/test/java/com/google/cloud/retail/v2/MockUserEventService.java
@@ -0,0 +1,59 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.cloud.retail.v2;
+
+import com.google.api.core.BetaApi;
+import com.google.api.gax.grpc.testing.MockGrpcService;
+import com.google.protobuf.AbstractMessage;
+import io.grpc.ServerServiceDefinition;
+import java.util.List;
+import javax.annotation.Generated;
+
+@BetaApi
+@Generated("by gapic-generator-java")
+public class MockUserEventService implements MockGrpcService {
+  private final MockUserEventServiceImpl serviceImpl;
+
+  public MockUserEventService() {
+    serviceImpl = new MockUserEventServiceImpl();
+  }
+
+  @Override
+  public List<AbstractMessage> getRequests() {
+    return serviceImpl.getRequests();
+  }
+
+  @Override
+  public void addResponse(AbstractMessage response) {
+    serviceImpl.addResponse(response);
+  }
+
+  @Override
+  public void addException(Exception exception) {
+    serviceImpl.addException(exception);
+  }
+
+  @Override
+  public ServerServiceDefinition getServiceDefinition() {
+    return serviceImpl.bindService();
+  }
+
+  @Override
+  public void reset() {
+    serviceImpl.reset();
+  }
+}
diff --git a/google-cloud-retail/src/test/java/com/google/cloud/retail/v2/MockUserEventServiceImpl.java b/google-cloud-retail/src/test/java/com/google/cloud/retail/v2/MockUserEventServiceImpl.java
new file mode 100644
index 00000000..179819a4
--- /dev/null
+++ b/google-cloud-retail/src/test/java/com/google/cloud/retail/v2/MockUserEventServiceImpl.java
@@ -0,0 +1,137 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.cloud.retail.v2;
+
+import com.google.api.HttpBody;
+import com.google.api.core.BetaApi;
+import com.google.cloud.retail.v2.UserEventServiceGrpc.UserEventServiceImplBase;
+import com.google.longrunning.Operation;
+import com.google.protobuf.AbstractMessage;
+import io.grpc.stub.StreamObserver;
+import java.util.ArrayList;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Queue;
+import javax.annotation.Generated;
+
+@BetaApi
+@Generated("by gapic-generator-java")
+public class MockUserEventServiceImpl extends UserEventServiceImplBase {
+  private List<AbstractMessage> requests;
+  private Queue<Object> responses;
+
+  public MockUserEventServiceImpl() {
+    requests = new ArrayList<>();
+    responses = new LinkedList<>();
+  }
+
+  public List<AbstractMessage> getRequests() {
+    return requests;
+  }
+
+  public void addResponse(AbstractMessage response) {
+    responses.add(response);
+  }
+
+  public void setResponses(List<AbstractMessage> responses) {
+    this.responses = new LinkedList<Object>(responses);
+  }
+
+  public void addException(Exception exception) {
+    responses.add(exception);
+  }
+
+  public void reset() {
+    requests = new ArrayList<>();
+    responses = new LinkedList<>();
+  }
+
+  @Override
+  public void writeUserEvent(
+      WriteUserEventRequest request, StreamObserver<UserEvent> responseObserver) {
+    Object response = responses.remove();
+    if (response instanceof UserEvent) {
+      requests.add(request);
+      responseObserver.onNext(((UserEvent) response));
+      responseObserver.onCompleted();
+    } else if (response instanceof Exception) {
+      responseObserver.onError(((Exception) response));
+    } else {
+      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
+    }
+  }
+
+  @Override
+  public void collectUserEvent(
+      CollectUserEventRequest request, StreamObserver<HttpBody> responseObserver) {
+    Object response = responses.remove();
+    if (response instanceof HttpBody) {
+      requests.add(request);
+      responseObserver.onNext(((HttpBody) response));
+      responseObserver.onCompleted();
+    } else if (response instanceof Exception) {
+      responseObserver.onError(((Exception) response));
+    } else {
+      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
+    }
+  }
+
+  @Override
+  public void purgeUserEvents(
+      PurgeUserEventsRequest request, StreamObserver<Operation> responseObserver) {
+    Object response = responses.remove();
+    if (response instanceof Operation) {
+      requests.add(request);
+      responseObserver.onNext(((Operation) response));
+      responseObserver.onCompleted();
+    } else if (response instanceof Exception) {
+      responseObserver.onError(((Exception) response));
+    } else {
+      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
+    }
+  }
+
+  @Override
+  public void importUserEvents(
+      ImportUserEventsRequest request, StreamObserver<Operation> responseObserver) {
+    Object response = responses.remove();
+    if (response instanceof Operation) {
+      requests.add(request);
+      responseObserver.onNext(((Operation) response));
+      responseObserver.onCompleted();
+    } else if (response instanceof Exception) {
+      responseObserver.onError(((Exception) response));
+    } else {
+      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
+    }
+  }
+
+  @Override
+  public void rejoinUserEvents(
+      RejoinUserEventsRequest request, StreamObserver<Operation> responseObserver) {
+    Object response = responses.remove();
+    if (response instanceof Operation) {
+      requests.add(request);
+      responseObserver.onNext(((Operation) response));
+      responseObserver.onCompleted();
+    } else if (response instanceof Exception) {
+      responseObserver.onError(((Exception) response));
+    } else {
+      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
+    }
+  }
+}
diff --git a/google-cloud-retail/src/test/java/com/google/cloud/retail/v2/PredictionServiceClientTest.java b/google-cloud-retail/src/test/java/com/google/cloud/retail/v2/PredictionServiceClientTest.java
new file mode 100644
index 00000000..78be2792
--- /dev/null
+++ b/google-cloud-retail/src/test/java/com/google/cloud/retail/v2/PredictionServiceClientTest.java
@@ -0,0 +1,148 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.cloud.retail.v2;
+
+import com.google.api.gax.core.NoCredentialsProvider;
+import com.google.api.gax.grpc.GaxGrpcProperties;
+import com.google.api.gax.grpc.testing.LocalChannelProvider;
+import com.google.api.gax.grpc.testing.MockGrpcService;
+import com.google.api.gax.grpc.testing.MockServiceHelper;
+import com.google.api.gax.rpc.ApiClientHeaderProvider;
+import com.google.api.gax.rpc.InvalidArgumentException;
+import com.google.protobuf.AbstractMessage;
+import com.google.protobuf.Value;
+import io.grpc.StatusRuntimeException;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.List;
+import java.util.UUID;
+import javax.annotation.Generated;
+import org.junit.After;
+import org.junit.AfterClass;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+@Generated("by gapic-generator-java")
+public class PredictionServiceClientTest {
+  private static MockServiceHelper mockServiceHelper;
+  private PredictionServiceClient client;
+  private static MockPredictionService mockPredictionService;
+  private LocalChannelProvider channelProvider;
+
+  @BeforeClass
+  public static void startStaticServer() {
+    mockPredictionService = new MockPredictionService();
+    mockServiceHelper =
+        new MockServiceHelper(
+            UUID.randomUUID().toString(), Arrays.<MockGrpcService>asList(mockPredictionService));
+    mockServiceHelper.start();
+  }
+
+  @AfterClass
+  public static void stopServer() {
+    mockServiceHelper.stop();
+  }
+
+  @Before
+  public void setUp() throws IOException {
+    mockServiceHelper.reset();
+    channelProvider = mockServiceHelper.createChannelProvider();
+    PredictionServiceSettings settings =
+        PredictionServiceSettings.newBuilder()
+            .setTransportChannelProvider(channelProvider)
+            .setCredentialsProvider(NoCredentialsProvider.create())
+            .build();
+    client = PredictionServiceClient.create(settings);
+  }
+
+  @After
+  public void tearDown() throws Exception {
+    client.close();
+  }
+
+  @Test
+  public void predictTest() throws Exception {
+    PredictResponse expectedResponse =
+        PredictResponse.newBuilder()
+            .addAllResults(new ArrayList<PredictResponse.PredictionResult>())
+            .setAttributionToken("attributionToken104706234")
+            .addAllMissingIds(new ArrayList<String>())
+            .setValidateOnly(true)
+            .build();
+    mockPredictionService.addResponse(expectedResponse);
+
+    PredictRequest request =
+        PredictRequest.newBuilder()
+            .setPlacement("placement1792938725")
+            .setUserEvent(UserEvent.newBuilder().build())
+            .setPageSize(883849137)
+            .setPageToken("pageToken873572522")
+            .setFilter("filter-1274492040")
+            .setValidateOnly(true)
+            .putAllParams(new HashMap<String, Value>())
+            .putAllLabels(new HashMap<String, String>())
+            .build();
+
+    PredictResponse actualResponse = client.predict(request);
+    Assert.assertEquals(expectedResponse, actualResponse);
+
+    List<AbstractMessage> actualRequests = mockPredictionService.getRequests();
+    Assert.assertEquals(1, actualRequests.size());
+    PredictRequest actualRequest = ((PredictRequest) actualRequests.get(0));
+
+    Assert.assertEquals(request.getPlacement(), actualRequest.getPlacement());
+    Assert.assertEquals(request.getUserEvent(), actualRequest.getUserEvent());
+    Assert.assertEquals(request.getPageSize(), actualRequest.getPageSize());
+    Assert.assertEquals(request.getPageToken(), actualRequest.getPageToken());
+    Assert.assertEquals(request.getFilter(), actualRequest.getFilter());
+    Assert.assertEquals(request.getValidateOnly(), actualRequest.getValidateOnly());
+    Assert.assertEquals(request.getParamsMap(), actualRequest.getParamsMap());
+    Assert.assertEquals(request.getLabelsMap(), actualRequest.getLabelsMap());
+    Assert.assertTrue(
+        channelProvider.isHeaderSent(
+            ApiClientHeaderProvider.getDefaultApiClientHeaderKey(),
+            GaxGrpcProperties.getDefaultApiClientHeaderPattern()));
+  }
+
+  @Test
+  public void predictExceptionTest() throws Exception {
+    StatusRuntimeException exception = new StatusRuntimeException(io.grpc.Status.INVALID_ARGUMENT);
+    mockPredictionService.addException(exception);
+
+    try {
+      PredictRequest request =
+          PredictRequest.newBuilder()
+              .setPlacement("placement1792938725")
+              .setUserEvent(UserEvent.newBuilder().build())
+              .setPageSize(883849137)
+              .setPageToken("pageToken873572522")
+              .setFilter("filter-1274492040")
+              .setValidateOnly(true)
+              .putAllParams(new HashMap<String, Value>())
+              .putAllLabels(new HashMap<String, String>())
+              .build();
+      client.predict(request);
+      Assert.fail("No exception raised");
+    } catch (InvalidArgumentException e) {
+      // Expected exception.
+    }
+  }
+}
diff --git a/google-cloud-retail/src/test/java/com/google/cloud/retail/v2/ProductServiceClientTest.java b/google-cloud-retail/src/test/java/com/google/cloud/retail/v2/ProductServiceClientTest.java
new file mode 100644
index 00000000..6540fde8
--- /dev/null
+++ b/google-cloud-retail/src/test/java/com/google/cloud/retail/v2/ProductServiceClientTest.java
@@ -0,0 +1,497 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.cloud.retail.v2;
+
+import com.google.api.gax.core.NoCredentialsProvider;
+import com.google.api.gax.grpc.GaxGrpcProperties;
+import com.google.api.gax.grpc.testing.LocalChannelProvider;
+import com.google.api.gax.grpc.testing.MockGrpcService;
+import com.google.api.gax.grpc.testing.MockServiceHelper;
+import com.google.api.gax.rpc.ApiClientHeaderProvider;
+import com.google.api.gax.rpc.InvalidArgumentException;
+import com.google.api.gax.rpc.StatusCode;
+import com.google.longrunning.Operation;
+import com.google.protobuf.AbstractMessage;
+import com.google.protobuf.Any;
+import com.google.protobuf.Empty;
+import com.google.protobuf.FieldMask;
+import com.google.protobuf.Int32Value;
+import com.google.protobuf.Timestamp;
+import com.google.rpc.Status;
+import io.grpc.StatusRuntimeException;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.List;
+import java.util.UUID;
+import java.util.concurrent.ExecutionException;
+import javax.annotation.Generated;
+import org.junit.After;
+import org.junit.AfterClass;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+@Generated("by gapic-generator-java")
+public class ProductServiceClientTest {
+  private static MockProductService mockProductService;
+  private static MockServiceHelper mockServiceHelper;
+  private ProductServiceClient client;
+  private LocalChannelProvider channelProvider;
+
+  @BeforeClass
+  public static void startStaticServer() {
+    mockProductService = new MockProductService();
+    mockServiceHelper =
+        new MockServiceHelper(
+            UUID.randomUUID().toString(), Arrays.<MockGrpcService>asList(mockProductService));
+    mockServiceHelper.start();
+  }
+
+  @AfterClass
+  public static void stopServer() {
+    mockServiceHelper.stop();
+  }
+
+  @Before
+  public void setUp() throws IOException {
+    mockServiceHelper.reset();
+    channelProvider = mockServiceHelper.createChannelProvider();
+    ProductServiceSettings settings =
+        ProductServiceSettings.newBuilder()
+            .setTransportChannelProvider(channelProvider)
+            .setCredentialsProvider(NoCredentialsProvider.create())
+            .build();
+    client = ProductServiceClient.create(settings);
+  }
+
+  @After
+  public void tearDown() throws Exception {
+    client.close();
+  }
+
+  @Test
+  public void createProductTest() throws Exception {
+    Product expectedResponse =
+        Product.newBuilder()
+            .setName(
+                ProductName.of("[PROJECT]", "[LOCATION]", "[CATALOG]", "[BRANCH]", "[PRODUCT]")
+                    .toString())
+            .setId("id3355")
+            .setPrimaryProductId("primaryProductId-857339256")
+            .addAllCategories(new ArrayList<String>())
+            .setTitle("title110371416")
+            .setDescription("description-1724546052")
+            .putAllAttributes(new HashMap<String, CustomAttribute>())
+            .addAllTags(new ArrayList<String>())
+            .setPriceInfo(PriceInfo.newBuilder().build())
+            .setAvailableTime(Timestamp.newBuilder().build())
+            .setAvailableQuantity(Int32Value.newBuilder().build())
+            .setUri("uri116076")
+            .addAllImages(new ArrayList<Image>())
+            .build();
+    mockProductService.addResponse(expectedResponse);
+
+    BranchName parent = BranchName.of("[PROJECT]", "[LOCATION]", "[CATALOG]", "[BRANCH]");
+    Product product = Product.newBuilder().build();
+    String productId = "productId-1051830678";
+
+    Product actualResponse = client.createProduct(parent, product, productId);
+    Assert.assertEquals(expectedResponse, actualResponse);
+
+    List<AbstractMessage> actualRequests = mockProductService.getRequests();
+    Assert.assertEquals(1, actualRequests.size());
+    CreateProductRequest actualRequest = ((CreateProductRequest) actualRequests.get(0));
+
+    Assert.assertEquals(parent.toString(), actualRequest.getParent());
+    Assert.assertEquals(product, actualRequest.getProduct());
+    Assert.assertEquals(productId, actualRequest.getProductId());
+    Assert.assertTrue(
+        channelProvider.isHeaderSent(
+            ApiClientHeaderProvider.getDefaultApiClientHeaderKey(),
+            GaxGrpcProperties.getDefaultApiClientHeaderPattern()));
+  }
+
+  @Test
+  public void createProductExceptionTest() throws Exception {
+    StatusRuntimeException exception = new StatusRuntimeException(io.grpc.Status.INVALID_ARGUMENT);
+    mockProductService.addException(exception);
+
+    try {
+      BranchName parent = BranchName.of("[PROJECT]", "[LOCATION]", "[CATALOG]", "[BRANCH]");
+      Product product = Product.newBuilder().build();
+      String productId = "productId-1051830678";
+      client.createProduct(parent, product, productId);
+      Assert.fail("No exception raised");
+    } catch (InvalidArgumentException e) {
+      // Expected exception.
+    }
+  }
+
+  @Test
+  public void createProductTest2() throws Exception {
+    Product expectedResponse =
+        Product.newBuilder()
+            .setName(
+                ProductName.of("[PROJECT]", "[LOCATION]", "[CATALOG]", "[BRANCH]", "[PRODUCT]")
+                    .toString())
+            .setId("id3355")
+            .setPrimaryProductId("primaryProductId-857339256")
+            .addAllCategories(new ArrayList<String>())
+            .setTitle("title110371416")
+            .setDescription("description-1724546052")
+            .putAllAttributes(new HashMap<String, CustomAttribute>())
+            .addAllTags(new ArrayList<String>())
+            .setPriceInfo(PriceInfo.newBuilder().build())
+            .setAvailableTime(Timestamp.newBuilder().build())
+            .setAvailableQuantity(Int32Value.newBuilder().build())
+            .setUri("uri116076")
+            .addAllImages(new ArrayList<Image>())
+            .build();
+    mockProductService.addResponse(expectedResponse);
+
+    String parent = "parent-995424086";
+    Product product = Product.newBuilder().build();
+    String productId = "productId-1051830678";
+
+    Product actualResponse = client.createProduct(parent, product, productId);
+    Assert.assertEquals(expectedResponse, actualResponse);
+
+    List<AbstractMessage> actualRequests = mockProductService.getRequests();
+    Assert.assertEquals(1, actualRequests.size());
+    CreateProductRequest actualRequest = ((CreateProductRequest) actualRequests.get(0));
+
+    Assert.assertEquals(parent, actualRequest.getParent());
+    Assert.assertEquals(product, actualRequest.getProduct());
+    Assert.assertEquals(productId, actualRequest.getProductId());
+    Assert.assertTrue(
+        channelProvider.isHeaderSent(
+            ApiClientHeaderProvider.getDefaultApiClientHeaderKey(),
+            GaxGrpcProperties.getDefaultApiClientHeaderPattern()));
+  }
+
+  @Test
+  public void createProductExceptionTest2() throws Exception {
+    StatusRuntimeException exception = new StatusRuntimeException(io.grpc.Status.INVALID_ARGUMENT);
+    mockProductService.addException(exception);
+
+    try {
+      String parent = "parent-995424086";
+      Product product = Product.newBuilder().build();
+      String productId = "productId-1051830678";
+      client.createProduct(parent, product, productId);
+      Assert.fail("No exception raised");
+    } catch (InvalidArgumentException e) {
+      // Expected exception.
+    }
+  }
+
+  @Test
+  public void getProductTest() throws Exception {
+    Product expectedResponse =
+        Product.newBuilder()
+            .setName(
+                ProductName.of("[PROJECT]", "[LOCATION]", "[CATALOG]", "[BRANCH]", "[PRODUCT]")
+                    .toString())
+            .setId("id3355")
+            .setPrimaryProductId("primaryProductId-857339256")
+            .addAllCategories(new ArrayList<String>())
+            .setTitle("title110371416")
+            .setDescription("description-1724546052")
+            .putAllAttributes(new HashMap<String, CustomAttribute>())
+            .addAllTags(new ArrayList<String>())
+            .setPriceInfo(PriceInfo.newBuilder().build())
+            .setAvailableTime(Timestamp.newBuilder().build())
+            .setAvailableQuantity(Int32Value.newBuilder().build())
+            .setUri("uri116076")
+            .addAllImages(new ArrayList<Image>())
+            .build();
+    mockProductService.addResponse(expectedResponse);
+
+    ProductName name =
+        ProductName.of("[PROJECT]", "[LOCATION]", "[CATALOG]", "[BRANCH]", "[PRODUCT]");
+
+    Product actualResponse = client.getProduct(name);
+    Assert.assertEquals(expectedResponse, actualResponse);
+
+    List<AbstractMessage> actualRequests = mockProductService.getRequests();
+    Assert.assertEquals(1, actualRequests.size());
+    GetProductRequest actualRequest = ((GetProductRequest) actualRequests.get(0));
+
+    Assert.assertEquals(name.toString(), actualRequest.getName());
+    Assert.assertTrue(
+        channelProvider.isHeaderSent(
+            ApiClientHeaderProvider.getDefaultApiClientHeaderKey(),
+            GaxGrpcProperties.getDefaultApiClientHeaderPattern()));
+  }
+
+  @Test
+  public void getProductExceptionTest() throws Exception {
+    StatusRuntimeException exception = new StatusRuntimeException(io.grpc.Status.INVALID_ARGUMENT);
+    mockProductService.addException(exception);
+
+    try {
+      ProductName name =
+          ProductName.of("[PROJECT]", "[LOCATION]", "[CATALOG]", "[BRANCH]", "[PRODUCT]");
+      client.getProduct(name);
+      Assert.fail("No exception raised");
+    } catch (InvalidArgumentException e) {
+      // Expected exception.
+    }
+  }
+
+  @Test
+  public void getProductTest2() throws Exception {
+    Product expectedResponse =
+        Product.newBuilder()
+            .setName(
+                ProductName.of("[PROJECT]", "[LOCATION]", "[CATALOG]", "[BRANCH]", "[PRODUCT]")
+                    .toString())
+            .setId("id3355")
+            .setPrimaryProductId("primaryProductId-857339256")
+            .addAllCategories(new ArrayList<String>())
+            .setTitle("title110371416")
+            .setDescription("description-1724546052")
+            .putAllAttributes(new HashMap<String, CustomAttribute>())
+            .addAllTags(new ArrayList<String>())
+            .setPriceInfo(PriceInfo.newBuilder().build())
+            .setAvailableTime(Timestamp.newBuilder().build())
+            .setAvailableQuantity(Int32Value.newBuilder().build())
+            .setUri("uri116076")
+            .addAllImages(new ArrayList<Image>())
+            .build();
+    mockProductService.addResponse(expectedResponse);
+
+    String name = "name3373707";
+
+    Product actualResponse = client.getProduct(name);
+    Assert.assertEquals(expectedResponse, actualResponse);
+
+    List<AbstractMessage> actualRequests = mockProductService.getRequests();
+    Assert.assertEquals(1, actualRequests.size());
+    GetProductRequest actualRequest = ((GetProductRequest) actualRequests.get(0));
+
+    Assert.assertEquals(name, actualRequest.getName());
+    Assert.assertTrue(
+        channelProvider.isHeaderSent(
+            ApiClientHeaderProvider.getDefaultApiClientHeaderKey(),
+            GaxGrpcProperties.getDefaultApiClientHeaderPattern()));
+  }
+
+  @Test
+  public void getProductExceptionTest2() throws Exception {
+    StatusRuntimeException exception = new StatusRuntimeException(io.grpc.Status.INVALID_ARGUMENT);
+    mockProductService.addException(exception);
+
+    try {
+      String name = "name3373707";
+      client.getProduct(name);
+      Assert.fail("No exception raised");
+    } catch (InvalidArgumentException e) {
+      // Expected exception.
+    }
+  }
+
+  @Test
+  public void updateProductTest() throws Exception {
+    Product expectedResponse =
+        Product.newBuilder()
+            .setName(
+                ProductName.of("[PROJECT]", "[LOCATION]", "[CATALOG]", "[BRANCH]", "[PRODUCT]")
+                    .toString())
+            .setId("id3355")
+            .setPrimaryProductId("primaryProductId-857339256")
+            .addAllCategories(new ArrayList<String>())
+            .setTitle("title110371416")
+            .setDescription("description-1724546052")
+            .putAllAttributes(new HashMap<String, CustomAttribute>())
+            .addAllTags(new ArrayList<String>())
+            .setPriceInfo(PriceInfo.newBuilder().build())
+            .setAvailableTime(Timestamp.newBuilder().build())
+            .setAvailableQuantity(Int32Value.newBuilder().build())
+            .setUri("uri116076")
+            .addAllImages(new ArrayList<Image>())
+            .build();
+    mockProductService.addResponse(expectedResponse);
+
+    Product product = Product.newBuilder().build();
+    FieldMask updateMask = FieldMask.newBuilder().build();
+
+    Product actualResponse = client.updateProduct(product, updateMask);
+    Assert.assertEquals(expectedResponse, actualResponse);
+
+    List<AbstractMessage> actualRequests = mockProductService.getRequests();
+    Assert.assertEquals(1, actualRequests.size());
+    UpdateProductRequest actualRequest = ((UpdateProductRequest) actualRequests.get(0));
+
+    Assert.assertEquals(product, actualRequest.getProduct());
+    Assert.assertEquals(updateMask, actualRequest.getUpdateMask());
+    Assert.assertTrue(
+        channelProvider.isHeaderSent(
+            ApiClientHeaderProvider.getDefaultApiClientHeaderKey(),
+            GaxGrpcProperties.getDefaultApiClientHeaderPattern()));
+  }
+
+  @Test
+  public void updateProductExceptionTest() throws Exception {
+    StatusRuntimeException exception = new StatusRuntimeException(io.grpc.Status.INVALID_ARGUMENT);
+    mockProductService.addException(exception);
+
+    try {
+      Product product = Product.newBuilder().build();
+      FieldMask updateMask = FieldMask.newBuilder().build();
+      client.updateProduct(product, updateMask);
+      Assert.fail("No exception raised");
+    } catch (InvalidArgumentException e) {
+      // Expected exception.
+    }
+  }
+
+  @Test
+  public void deleteProductTest() throws Exception {
+    Empty expectedResponse = Empty.newBuilder().build();
+    mockProductService.addResponse(expectedResponse);
+
+    ProductName name =
+        ProductName.of("[PROJECT]", "[LOCATION]", "[CATALOG]", "[BRANCH]", "[PRODUCT]");
+
+    client.deleteProduct(name);
+
+    List<AbstractMessage> actualRequests = mockProductService.getRequests();
+    Assert.assertEquals(1, actualRequests.size());
+    DeleteProductRequest actualRequest = ((DeleteProductRequest) actualRequests.get(0));
+
+    Assert.assertEquals(name.toString(), actualRequest.getName());
+    Assert.assertTrue(
+        channelProvider.isHeaderSent(
+            ApiClientHeaderProvider.getDefaultApiClientHeaderKey(),
+            GaxGrpcProperties.getDefaultApiClientHeaderPattern()));
+  }
+
+  @Test
+  public void deleteProductExceptionTest() throws Exception {
+    StatusRuntimeException exception = new StatusRuntimeException(io.grpc.Status.INVALID_ARGUMENT);
+    mockProductService.addException(exception);
+
+    try {
+      ProductName name =
+          ProductName.of("[PROJECT]", "[LOCATION]", "[CATALOG]", "[BRANCH]", "[PRODUCT]");
+      client.deleteProduct(name);
+      Assert.fail("No exception raised");
+    } catch (InvalidArgumentException e) {
+      // Expected exception.
+    }
+  }
+
+  @Test
+  public void deleteProductTest2() throws Exception {
+    Empty expectedResponse = Empty.newBuilder().build();
+    mockProductService.addResponse(expectedResponse);
+
+    String name = "name3373707";
+
+    client.deleteProduct(name);
+
+    List<AbstractMessage> actualRequests = mockProductService.getRequests();
+    Assert.assertEquals(1, actualRequests.size());
+    DeleteProductRequest actualRequest = ((DeleteProductRequest) actualRequests.get(0));
+
+    Assert.assertEquals(name, actualRequest.getName());
+    Assert.assertTrue(
+        channelProvider.isHeaderSent(
+            ApiClientHeaderProvider.getDefaultApiClientHeaderKey(),
+            GaxGrpcProperties.getDefaultApiClientHeaderPattern()));
+  }
+
+  @Test
+  public void deleteProductExceptionTest2() throws Exception {
+    StatusRuntimeException exception = new StatusRuntimeException(io.grpc.Status.INVALID_ARGUMENT);
+    mockProductService.addException(exception);
+
+    try {
+      String name = "name3373707";
+      client.deleteProduct(name);
+      Assert.fail("No exception raised");
+    } catch (InvalidArgumentException e) {
+      // Expected exception.
+    }
+  }
+
+  @Test
+  public void importProductsTest() throws Exception {
+    ImportProductsResponse expectedResponse =
+        ImportProductsResponse.newBuilder()
+            .addAllErrorSamples(new ArrayList<Status>())
+            .setErrorsConfig(ImportErrorsConfig.newBuilder().build())
+            .build();
+    Operation resultOperation =
+        Operation.newBuilder()
+            .setName("importProductsTest")
+            .setDone(true)
+            .setResponse(Any.pack(expectedResponse))
+            .build();
+    mockProductService.addResponse(resultOperation);
+
+    ImportProductsRequest request =
+        ImportProductsRequest.newBuilder()
+            .setParent("parent-995424086")
+            .setInputConfig(ProductInputConfig.newBuilder().build())
+            .setErrorsConfig(ImportErrorsConfig.newBuilder().build())
+            .setUpdateMask(FieldMask.newBuilder().build())
+            .build();
+
+    ImportProductsResponse actualResponse = client.importProductsAsync(request).get();
+    Assert.assertEquals(expectedResponse, actualResponse);
+
+    List<AbstractMessage> actualRequests = mockProductService.getRequests();
+    Assert.assertEquals(1, actualRequests.size());
+    ImportProductsRequest actualRequest = ((ImportProductsRequest) actualRequests.get(0));
+
+    Assert.assertEquals(request.getParent(), actualRequest.getParent());
+    Assert.assertEquals(request.getInputConfig(), actualRequest.getInputConfig());
+    Assert.assertEquals(request.getErrorsConfig(), actualRequest.getErrorsConfig());
+    Assert.assertEquals(request.getUpdateMask(), actualRequest.getUpdateMask());
+    Assert.assertTrue(
+        channelProvider.isHeaderSent(
+            ApiClientHeaderProvider.getDefaultApiClientHeaderKey(),
+            GaxGrpcProperties.getDefaultApiClientHeaderPattern()));
+  }
+
+  @Test
+  public void importProductsExceptionTest() throws Exception {
+    StatusRuntimeException exception = new StatusRuntimeException(io.grpc.Status.INVALID_ARGUMENT);
+    mockProductService.addException(exception);
+
+    try {
+      ImportProductsRequest request =
+          ImportProductsRequest.newBuilder()
+              .setParent("parent-995424086")
+              .setInputConfig(ProductInputConfig.newBuilder().build())
+              .setErrorsConfig(ImportErrorsConfig.newBuilder().build())
+              .setUpdateMask(FieldMask.newBuilder().build())
+              .build();
+      client.importProductsAsync(request).get();
+      Assert.fail("No exception raised");
+    } catch (ExecutionException e) {
+      Assert.assertEquals(InvalidArgumentException.class, e.getCause().getClass());
+      InvalidArgumentException apiException = ((InvalidArgumentException) e.getCause());
+      Assert.assertEquals(StatusCode.Code.INVALID_ARGUMENT, apiException.getStatusCode().getCode());
+    }
+  }
+}
diff --git a/google-cloud-retail/src/test/java/com/google/cloud/retail/v2/UserEventServiceClientTest.java b/google-cloud-retail/src/test/java/com/google/cloud/retail/v2/UserEventServiceClientTest.java
new file mode 100644
index 00000000..b4c1a349
--- /dev/null
+++ b/google-cloud-retail/src/test/java/com/google/cloud/retail/v2/UserEventServiceClientTest.java
@@ -0,0 +1,366 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.cloud.retail.v2;
+
+import com.google.api.HttpBody;
+import com.google.api.gax.core.NoCredentialsProvider;
+import com.google.api.gax.grpc.GaxGrpcProperties;
+import com.google.api.gax.grpc.testing.LocalChannelProvider;
+import com.google.api.gax.grpc.testing.MockGrpcService;
+import com.google.api.gax.grpc.testing.MockServiceHelper;
+import com.google.api.gax.rpc.ApiClientHeaderProvider;
+import com.google.api.gax.rpc.InvalidArgumentException;
+import com.google.api.gax.rpc.StatusCode;
+import com.google.longrunning.Operation;
+import com.google.protobuf.AbstractMessage;
+import com.google.protobuf.Any;
+import com.google.protobuf.ByteString;
+import com.google.protobuf.Timestamp;
+import com.google.rpc.Status;
+import io.grpc.StatusRuntimeException;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.List;
+import java.util.UUID;
+import java.util.concurrent.ExecutionException;
+import javax.annotation.Generated;
+import org.junit.After;
+import org.junit.AfterClass;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+@Generated("by gapic-generator-java")
+public class UserEventServiceClientTest {
+  private static MockServiceHelper mockServiceHelper;
+  private UserEventServiceClient client;
+  private static MockUserEventService mockUserEventService;
+  private LocalChannelProvider channelProvider;
+
+  @BeforeClass
+  public static void startStaticServer() {
+    mockUserEventService = new MockUserEventService();
+    mockServiceHelper =
+        new MockServiceHelper(
+            UUID.randomUUID().toString(), Arrays.<MockGrpcService>asList(mockUserEventService));
+    mockServiceHelper.start();
+  }
+
+  @AfterClass
+  public static void stopServer() {
+    mockServiceHelper.stop();
+  }
+
+  @Before
+  public void setUp() throws IOException {
+    mockServiceHelper.reset();
+    channelProvider = mockServiceHelper.createChannelProvider();
+    UserEventServiceSettings settings =
+        UserEventServiceSettings.newBuilder()
+            .setTransportChannelProvider(channelProvider)
+            .setCredentialsProvider(NoCredentialsProvider.create())
+            .build();
+    client = UserEventServiceClient.create(settings);
+  }
+
+  @After
+  public void tearDown() throws Exception {
+    client.close();
+  }
+
+  @Test
+  public void writeUserEventTest() throws Exception {
+    UserEvent expectedResponse =
+        UserEvent.newBuilder()
+            .setEventType("eventType31430900")
+            .setVisitorId("visitorId1880545833")
+            .setEventTime(Timestamp.newBuilder().build())
+            .addAllExperimentIds(new ArrayList<String>())
+            .setAttributionToken("attributionToken104706234")
+            .addAllProductDetails(new ArrayList<ProductDetail>())
+            .putAllAttributes(new HashMap<String, CustomAttribute>())
+            .setCartId("cartId-1367589797")
+            .setPurchaseTransaction(PurchaseTransaction.newBuilder().build())
+            .setSearchQuery("searchQuery-552137728")
+            .addAllPageCategories(new ArrayList<String>())
+            .setUserInfo(UserInfo.newBuilder().build())
+            .setUri("uri116076")
+            .setReferrerUri("referrerUri348088525")
+            .setPageViewId("pageViewId1362499087")
+            .build();
+    mockUserEventService.addResponse(expectedResponse);
+
+    WriteUserEventRequest request =
+        WriteUserEventRequest.newBuilder()
+            .setParent("parent-995424086")
+            .setUserEvent(UserEvent.newBuilder().build())
+            .build();
+
+    UserEvent actualResponse = client.writeUserEvent(request);
+    Assert.assertEquals(expectedResponse, actualResponse);
+
+    List<AbstractMessage> actualRequests = mockUserEventService.getRequests();
+    Assert.assertEquals(1, actualRequests.size());
+    WriteUserEventRequest actualRequest = ((WriteUserEventRequest) actualRequests.get(0));
+
+    Assert.assertEquals(request.getParent(), actualRequest.getParent());
+    Assert.assertEquals(request.getUserEvent(), actualRequest.getUserEvent());
+    Assert.assertTrue(
+        channelProvider.isHeaderSent(
+            ApiClientHeaderProvider.getDefaultApiClientHeaderKey(),
+            GaxGrpcProperties.getDefaultApiClientHeaderPattern()));
+  }
+
+  @Test
+  public void writeUserEventExceptionTest() throws Exception {
+    StatusRuntimeException exception = new StatusRuntimeException(io.grpc.Status.INVALID_ARGUMENT);
+    mockUserEventService.addException(exception);
+
+    try {
+      WriteUserEventRequest request =
+          WriteUserEventRequest.newBuilder()
+              .setParent("parent-995424086")
+              .setUserEvent(UserEvent.newBuilder().build())
+              .build();
+      client.writeUserEvent(request);
+      Assert.fail("No exception raised");
+    } catch (InvalidArgumentException e) {
+      // Expected exception.
+    }
+  }
+
+  @Test
+  public void collectUserEventTest() throws Exception {
+    HttpBody expectedResponse =
+        HttpBody.newBuilder()
+            .setContentType("contentType-389131437")
+            .setData(ByteString.EMPTY)
+            .addAllExtensions(new ArrayList<Any>())
+            .build();
+    mockUserEventService.addResponse(expectedResponse);
+
+    CollectUserEventRequest request =
+        CollectUserEventRequest.newBuilder()
+            .setParent("parent-995424086")
+            .setUserEvent("userEvent315571599")
+            .setUri("uri116076")
+            .setEts(100772)
+            .build();
+
+    HttpBody actualResponse = client.collectUserEvent(request);
+    Assert.assertEquals(expectedResponse, actualResponse);
+
+    List<AbstractMessage> actualRequests = mockUserEventService.getRequests();
+    Assert.assertEquals(1, actualRequests.size());
+    CollectUserEventRequest actualRequest = ((CollectUserEventRequest) actualRequests.get(0));
+
+    Assert.assertEquals(request.getParent(), actualRequest.getParent());
+    Assert.assertEquals(request.getUserEvent(), actualRequest.getUserEvent());
+    Assert.assertEquals(request.getUri(), actualRequest.getUri());
+    Assert.assertEquals(request.getEts(), actualRequest.getEts());
+    Assert.assertTrue(
+        channelProvider.isHeaderSent(
+            ApiClientHeaderProvider.getDefaultApiClientHeaderKey(),
+            GaxGrpcProperties.getDefaultApiClientHeaderPattern()));
+  }
+
+  @Test
+  public void collectUserEventExceptionTest() throws Exception {
+    StatusRuntimeException exception = new StatusRuntimeException(io.grpc.Status.INVALID_ARGUMENT);
+    mockUserEventService.addException(exception);
+
+    try {
+      CollectUserEventRequest request =
+          CollectUserEventRequest.newBuilder()
+              .setParent("parent-995424086")
+              .setUserEvent("userEvent315571599")
+              .setUri("uri116076")
+              .setEts(100772)
+              .build();
+      client.collectUserEvent(request);
+      Assert.fail("No exception raised");
+    } catch (InvalidArgumentException e) {
+      // Expected exception.
+    }
+  }
+
+  @Test
+  public void purgeUserEventsTest() throws Exception {
+    PurgeUserEventsResponse expectedResponse =
+        PurgeUserEventsResponse.newBuilder().setPurgedEventsCount(-310774833).build();
+    Operation resultOperation =
+        Operation.newBuilder()
+            .setName("purgeUserEventsTest")
+            .setDone(true)
+            .setResponse(Any.pack(expectedResponse))
+            .build();
+    mockUserEventService.addResponse(resultOperation);
+
+    PurgeUserEventsRequest request =
+        PurgeUserEventsRequest.newBuilder()
+            .setParent("parent-995424086")
+            .setFilter("filter-1274492040")
+            .setForce(true)
+            .build();
+
+    PurgeUserEventsResponse actualResponse = client.purgeUserEventsAsync(request).get();
+    Assert.assertEquals(expectedResponse, actualResponse);
+
+    List<AbstractMessage> actualRequests = mockUserEventService.getRequests();
+    Assert.assertEquals(1, actualRequests.size());
+    PurgeUserEventsRequest actualRequest = ((PurgeUserEventsRequest) actualRequests.get(0));
+
+    Assert.assertEquals(request.getParent(), actualRequest.getParent());
+    Assert.assertEquals(request.getFilter(), actualRequest.getFilter());
+    Assert.assertEquals(request.getForce(), actualRequest.getForce());
+    Assert.assertTrue(
+        channelProvider.isHeaderSent(
+            ApiClientHeaderProvider.getDefaultApiClientHeaderKey(),
+            GaxGrpcProperties.getDefaultApiClientHeaderPattern()));
+  }
+
+  @Test
+  public void purgeUserEventsExceptionTest() throws Exception {
+    StatusRuntimeException exception = new StatusRuntimeException(io.grpc.Status.INVALID_ARGUMENT);
+    mockUserEventService.addException(exception);
+
+    try {
+      PurgeUserEventsRequest request =
+          PurgeUserEventsRequest.newBuilder()
+              .setParent("parent-995424086")
+              .setFilter("filter-1274492040")
+              .setForce(true)
+              .build();
+      client.purgeUserEventsAsync(request).get();
+      Assert.fail("No exception raised");
+    } catch (ExecutionException e) {
+      Assert.assertEquals(InvalidArgumentException.class, e.getCause().getClass());
+      InvalidArgumentException apiException = ((InvalidArgumentException) e.getCause());
+      Assert.assertEquals(StatusCode.Code.INVALID_ARGUMENT, apiException.getStatusCode().getCode());
+    }
+  }
+
+  @Test
+  public void importUserEventsTest() throws Exception {
+    ImportUserEventsResponse expectedResponse =
+        ImportUserEventsResponse.newBuilder()
+            .addAllErrorSamples(new ArrayList<Status>())
+            .setErrorsConfig(ImportErrorsConfig.newBuilder().build())
+            .setImportSummary(UserEventImportSummary.newBuilder().build())
+            .build();
+    Operation resultOperation =
+        Operation.newBuilder()
+            .setName("importUserEventsTest")
+            .setDone(true)
+            .setResponse(Any.pack(expectedResponse))
+            .build();
+    mockUserEventService.addResponse(resultOperation);
+
+    ImportUserEventsRequest request =
+        ImportUserEventsRequest.newBuilder()
+            .setParent("parent-995424086")
+            .setInputConfig(UserEventInputConfig.newBuilder().build())
+            .setErrorsConfig(ImportErrorsConfig.newBuilder().build())
+            .build();
+
+    ImportUserEventsResponse actualResponse = client.importUserEventsAsync(request).get();
+    Assert.assertEquals(expectedResponse, actualResponse);
+
+    List<AbstractMessage> actualRequests = mockUserEventService.getRequests();
+    Assert.assertEquals(1, actualRequests.size());
+    ImportUserEventsRequest actualRequest = ((ImportUserEventsRequest) actualRequests.get(0));
+
+    Assert.assertEquals(request.getParent(), actualRequest.getParent());
+    Assert.assertEquals(request.getInputConfig(), actualRequest.getInputConfig());
+    Assert.assertEquals(request.getErrorsConfig(), actualRequest.getErrorsConfig());
+    Assert.assertTrue(
+        channelProvider.isHeaderSent(
+            ApiClientHeaderProvider.getDefaultApiClientHeaderKey(),
+            GaxGrpcProperties.getDefaultApiClientHeaderPattern()));
+  }
+
+  @Test
+  public void importUserEventsExceptionTest() throws Exception {
+    StatusRuntimeException exception = new StatusRuntimeException(io.grpc.Status.INVALID_ARGUMENT);
+    mockUserEventService.addException(exception);
+
+    try {
+      ImportUserEventsRequest request =
+          ImportUserEventsRequest.newBuilder()
+              .setParent("parent-995424086")
+              .setInputConfig(UserEventInputConfig.newBuilder().build())
+              .setErrorsConfig(ImportErrorsConfig.newBuilder().build())
+              .build();
+      client.importUserEventsAsync(request).get();
+      Assert.fail("No exception raised");
+    } catch (ExecutionException e) {
+      Assert.assertEquals(InvalidArgumentException.class, e.getCause().getClass());
+      InvalidArgumentException apiException = ((InvalidArgumentException) e.getCause());
+      Assert.assertEquals(StatusCode.Code.INVALID_ARGUMENT, apiException.getStatusCode().getCode());
+    }
+  }
+
+  @Test
+  public void rejoinUserEventsTest() throws Exception {
+    RejoinUserEventsResponse expectedResponse =
+        RejoinUserEventsResponse.newBuilder().setRejoinedUserEventsCount(-1152281574).build();
+    Operation resultOperation =
+        Operation.newBuilder()
+            .setName("rejoinUserEventsTest")
+            .setDone(true)
+            .setResponse(Any.pack(expectedResponse))
+            .build();
+    mockUserEventService.addResponse(resultOperation);
+
+    RejoinUserEventsRequest request =
+        RejoinUserEventsRequest.newBuilder().setParent("parent-995424086").build();
+
+    RejoinUserEventsResponse actualResponse = client.rejoinUserEventsAsync(request).get();
+    Assert.assertEquals(expectedResponse, actualResponse);
+
+    List<AbstractMessage> actualRequests = mockUserEventService.getRequests();
+    Assert.assertEquals(1, actualRequests.size());
+    RejoinUserEventsRequest actualRequest = ((RejoinUserEventsRequest) actualRequests.get(0));
+
+    Assert.assertEquals(request.getParent(), actualRequest.getParent());
+    Assert.assertEquals(request.getUserEventRejoinScope(), actualRequest.getUserEventRejoinScope());
+    Assert.assertTrue(
+        channelProvider.isHeaderSent(
+            ApiClientHeaderProvider.getDefaultApiClientHeaderKey(),
+            GaxGrpcProperties.getDefaultApiClientHeaderPattern()));
+  }
+
+  @Test
+  public void rejoinUserEventsExceptionTest() throws Exception {
+    StatusRuntimeException exception = new StatusRuntimeException(io.grpc.Status.INVALID_ARGUMENT);
+    mockUserEventService.addException(exception);
+
+    try {
+      RejoinUserEventsRequest request =
+          RejoinUserEventsRequest.newBuilder().setParent("parent-995424086").build();
+      client.rejoinUserEventsAsync(request).get();
+      Assert.fail("No exception raised");
+    } catch (ExecutionException e) {
+      Assert.assertEquals(InvalidArgumentException.class, e.getCause().getClass());
+      InvalidArgumentException apiException = ((InvalidArgumentException) e.getCause());
+      Assert.assertEquals(StatusCode.Code.INVALID_ARGUMENT, apiException.getStatusCode().getCode());
+    }
+  }
+}
diff --git a/grpc-google-cloud-retail-v2/pom.xml b/grpc-google-cloud-retail-v2/pom.xml
new file mode 100644
index 00000000..5f10645d
--- /dev/null
+++ b/grpc-google-cloud-retail-v2/pom.xml
@@ -0,0 +1,65 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <groupId>com.google.api.grpc</groupId>
+  <artifactId>grpc-google-cloud-retail-v2</artifactId>
+  <version>0.0.1-SNAPSHOT</version><!-- {x-version-update:grpc-google-cloud-retail-v2:current} -->
+  <name>grpc-google-cloud-retail-v2</name>
+  <description>GRPC library for google-cloud-retail</description>
+  <parent>
+    <groupId>com.google.cloud</groupId>
+    <artifactId>google-cloud-retail-parent</artifactId>
+    <version>0.0.1-SNAPSHOT</version><!-- {x-version-update:google-cloud-retail:current} -->
+  </parent>
+  <dependencies>
+    <dependency>
+      <groupId>io.grpc</groupId>
+      <artifactId>grpc-api</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>io.grpc</groupId>
+      <artifactId>grpc-stub</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>io.grpc</groupId>
+      <artifactId>grpc-protobuf</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>com.google.protobuf</groupId>
+      <artifactId>protobuf-java</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>com.google.api.grpc</groupId>
+      <artifactId>proto-google-cloud-retail-v2</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>com.google.guava</groupId>
+      <artifactId>guava</artifactId>
+    </dependency>
+  </dependencies>
+
+  <profiles>
+    <profile>
+      <id>java9</id>
+      <activation>
+        <jdk>[9,)</jdk>
+      </activation>
+      <dependencies>
+        <dependency>
+          <groupId>javax.annotation</groupId>
+          <artifactId>javax.annotation-api</artifactId>
+        </dependency>
+      </dependencies>
+    </profile>
+  </profiles>
+
+  <build>
+    <plugins>
+      <plugin>
+          <groupId>org.codehaus.mojo</groupId>
+          <artifactId>flatten-maven-plugin</artifactId>
+        </plugin>
+    </plugins>
+  </build>
+</project>
\ No newline at end of file
diff --git a/grpc-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/CatalogServiceGrpc.java b/grpc-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/CatalogServiceGrpc.java
new file mode 100644
index 00000000..d1a80ce0
--- /dev/null
+++ b/grpc-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/CatalogServiceGrpc.java
@@ -0,0 +1,476 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.google.cloud.retail.v2;
+
+import static io.grpc.MethodDescriptor.generateFullMethodName;
+import static io.grpc.stub.ClientCalls.asyncUnaryCall;
+import static io.grpc.stub.ClientCalls.blockingUnaryCall;
+import static io.grpc.stub.ClientCalls.futureUnaryCall;
+import static io.grpc.stub.ServerCalls.asyncUnaryCall;
+import static io.grpc.stub.ServerCalls.asyncUnimplementedUnaryCall;
+
+/**
+ *
+ *
+ * <pre>
+ * Service for managing catalog configuration.
+ * </pre>
+ */
+@javax.annotation.Generated(
+    value = "by gRPC proto compiler",
+    comments = "Source: google/cloud/retail/v2/catalog_service.proto")
+public final class CatalogServiceGrpc {
+
+  private CatalogServiceGrpc() {}
+
+  public static final String SERVICE_NAME = "google.cloud.retail.v2.CatalogService";
+
+  // Static method descriptors that strictly reflect the proto.
+  private static volatile io.grpc.MethodDescriptor<
+          com.google.cloud.retail.v2.ListCatalogsRequest,
+          com.google.cloud.retail.v2.ListCatalogsResponse>
+      getListCatalogsMethod;
+
+  @io.grpc.stub.annotations.RpcMethod(
+      fullMethodName = SERVICE_NAME + '/' + "ListCatalogs",
+      requestType = com.google.cloud.retail.v2.ListCatalogsRequest.class,
+      responseType = com.google.cloud.retail.v2.ListCatalogsResponse.class,
+      methodType = io.grpc.MethodDescriptor.MethodType.UNARY)
+  public static io.grpc.MethodDescriptor<
+          com.google.cloud.retail.v2.ListCatalogsRequest,
+          com.google.cloud.retail.v2.ListCatalogsResponse>
+      getListCatalogsMethod() {
+    io.grpc.MethodDescriptor<
+            com.google.cloud.retail.v2.ListCatalogsRequest,
+            com.google.cloud.retail.v2.ListCatalogsResponse>
+        getListCatalogsMethod;
+    if ((getListCatalogsMethod = CatalogServiceGrpc.getListCatalogsMethod) == null) {
+      synchronized (CatalogServiceGrpc.class) {
+        if ((getListCatalogsMethod = CatalogServiceGrpc.getListCatalogsMethod) == null) {
+          CatalogServiceGrpc.getListCatalogsMethod =
+              getListCatalogsMethod =
+                  io.grpc.MethodDescriptor
+                      .<com.google.cloud.retail.v2.ListCatalogsRequest,
+                          com.google.cloud.retail.v2.ListCatalogsResponse>
+                          newBuilder()
+                      .setType(io.grpc.MethodDescriptor.MethodType.UNARY)
+                      .setFullMethodName(generateFullMethodName(SERVICE_NAME, "ListCatalogs"))
+                      .setSampledToLocalTracing(true)
+                      .setRequestMarshaller(
+                          io.grpc.protobuf.ProtoUtils.marshaller(
+                              com.google.cloud.retail.v2.ListCatalogsRequest.getDefaultInstance()))
+                      .setResponseMarshaller(
+                          io.grpc.protobuf.ProtoUtils.marshaller(
+                              com.google.cloud.retail.v2.ListCatalogsResponse.getDefaultInstance()))
+                      .setSchemaDescriptor(
+                          new CatalogServiceMethodDescriptorSupplier("ListCatalogs"))
+                      .build();
+        }
+      }
+    }
+    return getListCatalogsMethod;
+  }
+
+  private static volatile io.grpc.MethodDescriptor<
+          com.google.cloud.retail.v2.UpdateCatalogRequest, com.google.cloud.retail.v2.Catalog>
+      getUpdateCatalogMethod;
+
+  @io.grpc.stub.annotations.RpcMethod(
+      fullMethodName = SERVICE_NAME + '/' + "UpdateCatalog",
+      requestType = com.google.cloud.retail.v2.UpdateCatalogRequest.class,
+      responseType = com.google.cloud.retail.v2.Catalog.class,
+      methodType = io.grpc.MethodDescriptor.MethodType.UNARY)
+  public static io.grpc.MethodDescriptor<
+          com.google.cloud.retail.v2.UpdateCatalogRequest, com.google.cloud.retail.v2.Catalog>
+      getUpdateCatalogMethod() {
+    io.grpc.MethodDescriptor<
+            com.google.cloud.retail.v2.UpdateCatalogRequest, com.google.cloud.retail.v2.Catalog>
+        getUpdateCatalogMethod;
+    if ((getUpdateCatalogMethod = CatalogServiceGrpc.getUpdateCatalogMethod) == null) {
+      synchronized (CatalogServiceGrpc.class) {
+        if ((getUpdateCatalogMethod = CatalogServiceGrpc.getUpdateCatalogMethod) == null) {
+          CatalogServiceGrpc.getUpdateCatalogMethod =
+              getUpdateCatalogMethod =
+                  io.grpc.MethodDescriptor
+                      .<com.google.cloud.retail.v2.UpdateCatalogRequest,
+                          com.google.cloud.retail.v2.Catalog>
+                          newBuilder()
+                      .setType(io.grpc.MethodDescriptor.MethodType.UNARY)
+                      .setFullMethodName(generateFullMethodName(SERVICE_NAME, "UpdateCatalog"))
+                      .setSampledToLocalTracing(true)
+                      .setRequestMarshaller(
+                          io.grpc.protobuf.ProtoUtils.marshaller(
+                              com.google.cloud.retail.v2.UpdateCatalogRequest.getDefaultInstance()))
+                      .setResponseMarshaller(
+                          io.grpc.protobuf.ProtoUtils.marshaller(
+                              com.google.cloud.retail.v2.Catalog.getDefaultInstance()))
+                      .setSchemaDescriptor(
+                          new CatalogServiceMethodDescriptorSupplier("UpdateCatalog"))
+                      .build();
+        }
+      }
+    }
+    return getUpdateCatalogMethod;
+  }
+
+  /** Creates a new async stub that supports all call types for the service */
+  public static CatalogServiceStub newStub(io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<CatalogServiceStub> factory =
+        new io.grpc.stub.AbstractStub.StubFactory<CatalogServiceStub>() {
+          @java.lang.Override
+          public CatalogServiceStub newStub(
+              io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+            return new CatalogServiceStub(channel, callOptions);
+          }
+        };
+    return CatalogServiceStub.newStub(factory, channel);
+  }
+
+  /**
+   * Creates a new blocking-style stub that supports unary and streaming output calls on the service
+   */
+  public static CatalogServiceBlockingStub newBlockingStub(io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<CatalogServiceBlockingStub> factory =
+        new io.grpc.stub.AbstractStub.StubFactory<CatalogServiceBlockingStub>() {
+          @java.lang.Override
+          public CatalogServiceBlockingStub newStub(
+              io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+            return new CatalogServiceBlockingStub(channel, callOptions);
+          }
+        };
+    return CatalogServiceBlockingStub.newStub(factory, channel);
+  }
+
+  /** Creates a new ListenableFuture-style stub that supports unary calls on the service */
+  public static CatalogServiceFutureStub newFutureStub(io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<CatalogServiceFutureStub> factory =
+        new io.grpc.stub.AbstractStub.StubFactory<CatalogServiceFutureStub>() {
+          @java.lang.Override
+          public CatalogServiceFutureStub newStub(
+              io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+            return new CatalogServiceFutureStub(channel, callOptions);
+          }
+        };
+    return CatalogServiceFutureStub.newStub(factory, channel);
+  }
+
+  /**
+   *
+   *
+   * <pre>
+   * Service for managing catalog configuration.
+   * </pre>
+   */
+  public abstract static class CatalogServiceImplBase implements io.grpc.BindableService {
+
+    /**
+     *
+     *
+     * <pre>
+     * Lists all the [Catalog][google.cloud.retail.v2.Catalog]s associated with
+     * the project.
+     * </pre>
+     */
+    public void listCatalogs(
+        com.google.cloud.retail.v2.ListCatalogsRequest request,
+        io.grpc.stub.StreamObserver<com.google.cloud.retail.v2.ListCatalogsResponse>
+            responseObserver) {
+      asyncUnimplementedUnaryCall(getListCatalogsMethod(), responseObserver);
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * Updates the [Catalog][google.cloud.retail.v2.Catalog]s.
+     * </pre>
+     */
+    public void updateCatalog(
+        com.google.cloud.retail.v2.UpdateCatalogRequest request,
+        io.grpc.stub.StreamObserver<com.google.cloud.retail.v2.Catalog> responseObserver) {
+      asyncUnimplementedUnaryCall(getUpdateCatalogMethod(), responseObserver);
+    }
+
+    @java.lang.Override
+    public final io.grpc.ServerServiceDefinition bindService() {
+      return io.grpc.ServerServiceDefinition.builder(getServiceDescriptor())
+          .addMethod(
+              getListCatalogsMethod(),
+              asyncUnaryCall(
+                  new MethodHandlers<
+                      com.google.cloud.retail.v2.ListCatalogsRequest,
+                      com.google.cloud.retail.v2.ListCatalogsResponse>(
+                      this, METHODID_LIST_CATALOGS)))
+          .addMethod(
+              getUpdateCatalogMethod(),
+              asyncUnaryCall(
+                  new MethodHandlers<
+                      com.google.cloud.retail.v2.UpdateCatalogRequest,
+                      com.google.cloud.retail.v2.Catalog>(this, METHODID_UPDATE_CATALOG)))
+          .build();
+    }
+  }
+
+  /**
+   *
+   *
+   * <pre>
+   * Service for managing catalog configuration.
+   * </pre>
+   */
+  public static final class CatalogServiceStub
+      extends io.grpc.stub.AbstractAsyncStub<CatalogServiceStub> {
+    private CatalogServiceStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected CatalogServiceStub build(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new CatalogServiceStub(channel, callOptions);
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * Lists all the [Catalog][google.cloud.retail.v2.Catalog]s associated with
+     * the project.
+     * </pre>
+     */
+    public void listCatalogs(
+        com.google.cloud.retail.v2.ListCatalogsRequest request,
+        io.grpc.stub.StreamObserver<com.google.cloud.retail.v2.ListCatalogsResponse>
+            responseObserver) {
+      asyncUnaryCall(
+          getChannel().newCall(getListCatalogsMethod(), getCallOptions()),
+          request,
+          responseObserver);
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * Updates the [Catalog][google.cloud.retail.v2.Catalog]s.
+     * </pre>
+     */
+    public void updateCatalog(
+        com.google.cloud.retail.v2.UpdateCatalogRequest request,
+        io.grpc.stub.StreamObserver<com.google.cloud.retail.v2.Catalog> responseObserver) {
+      asyncUnaryCall(
+          getChannel().newCall(getUpdateCatalogMethod(), getCallOptions()),
+          request,
+          responseObserver);
+    }
+  }
+
+  /**
+   *
+   *
+   * <pre>
+   * Service for managing catalog configuration.
+   * </pre>
+   */
+  public static final class CatalogServiceBlockingStub
+      extends io.grpc.stub.AbstractBlockingStub<CatalogServiceBlockingStub> {
+    private CatalogServiceBlockingStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected CatalogServiceBlockingStub build(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new CatalogServiceBlockingStub(channel, callOptions);
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * Lists all the [Catalog][google.cloud.retail.v2.Catalog]s associated with
+     * the project.
+     * </pre>
+     */
+    public com.google.cloud.retail.v2.ListCatalogsResponse listCatalogs(
+        com.google.cloud.retail.v2.ListCatalogsRequest request) {
+      return blockingUnaryCall(getChannel(), getListCatalogsMethod(), getCallOptions(), request);
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * Updates the [Catalog][google.cloud.retail.v2.Catalog]s.
+     * </pre>
+     */
+    public com.google.cloud.retail.v2.Catalog updateCatalog(
+        com.google.cloud.retail.v2.UpdateCatalogRequest request) {
+      return blockingUnaryCall(getChannel(), getUpdateCatalogMethod(), getCallOptions(), request);
+    }
+  }
+
+  /**
+   *
+   *
+   * <pre>
+   * Service for managing catalog configuration.
+   * </pre>
+   */
+  public static final class CatalogServiceFutureStub
+      extends io.grpc.stub.AbstractFutureStub<CatalogServiceFutureStub> {
+    private CatalogServiceFutureStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected CatalogServiceFutureStub build(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new CatalogServiceFutureStub(channel, callOptions);
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * Lists all the [Catalog][google.cloud.retail.v2.Catalog]s associated with
+     * the project.
+     * </pre>
+     */
+    public com.google.common.util.concurrent.ListenableFuture<
+            com.google.cloud.retail.v2.ListCatalogsResponse>
+        listCatalogs(com.google.cloud.retail.v2.ListCatalogsRequest request) {
+      return futureUnaryCall(
+          getChannel().newCall(getListCatalogsMethod(), getCallOptions()), request);
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * Updates the [Catalog][google.cloud.retail.v2.Catalog]s.
+     * </pre>
+     */
+    public com.google.common.util.concurrent.ListenableFuture<com.google.cloud.retail.v2.Catalog>
+        updateCatalog(com.google.cloud.retail.v2.UpdateCatalogRequest request) {
+      return futureUnaryCall(
+          getChannel().newCall(getUpdateCatalogMethod(), getCallOptions()), request);
+    }
+  }
+
+  private static final int METHODID_LIST_CATALOGS = 0;
+  private static final int METHODID_UPDATE_CATALOG = 1;
+
+  private static final class MethodHandlers<Req, Resp>
+      implements io.grpc.stub.ServerCalls.UnaryMethod<Req, Resp>,
+          io.grpc.stub.ServerCalls.ServerStreamingMethod<Req, Resp>,
+          io.grpc.stub.ServerCalls.ClientStreamingMethod<Req, Resp>,
+          io.grpc.stub.ServerCalls.BidiStreamingMethod<Req, Resp> {
+    private final CatalogServiceImplBase serviceImpl;
+    private final int methodId;
+
+    MethodHandlers(CatalogServiceImplBase serviceImpl, int methodId) {
+      this.serviceImpl = serviceImpl;
+      this.methodId = methodId;
+    }
+
+    @java.lang.Override
+    @java.lang.SuppressWarnings("unchecked")
+    public void invoke(Req request, io.grpc.stub.StreamObserver<Resp> responseObserver) {
+      switch (methodId) {
+        case METHODID_LIST_CATALOGS:
+          serviceImpl.listCatalogs(
+              (com.google.cloud.retail.v2.ListCatalogsRequest) request,
+              (io.grpc.stub.StreamObserver<com.google.cloud.retail.v2.ListCatalogsResponse>)
+                  responseObserver);
+          break;
+        case METHODID_UPDATE_CATALOG:
+          serviceImpl.updateCatalog(
+              (com.google.cloud.retail.v2.UpdateCatalogRequest) request,
+              (io.grpc.stub.StreamObserver<com.google.cloud.retail.v2.Catalog>) responseObserver);
+          break;
+        default:
+          throw new AssertionError();
+      }
+    }
+
+    @java.lang.Override
+    @java.lang.SuppressWarnings("unchecked")
+    public io.grpc.stub.StreamObserver<Req> invoke(
+        io.grpc.stub.StreamObserver<Resp> responseObserver) {
+      switch (methodId) {
+        default:
+          throw new AssertionError();
+      }
+    }
+  }
+
+  private abstract static class CatalogServiceBaseDescriptorSupplier
+      implements io.grpc.protobuf.ProtoFileDescriptorSupplier,
+          io.grpc.protobuf.ProtoServiceDescriptorSupplier {
+    CatalogServiceBaseDescriptorSupplier() {}
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.FileDescriptor getFileDescriptor() {
+      return com.google.cloud.retail.v2.CatalogServiceProto.getDescriptor();
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.ServiceDescriptor getServiceDescriptor() {
+      return getFileDescriptor().findServiceByName("CatalogService");
+    }
+  }
+
+  private static final class CatalogServiceFileDescriptorSupplier
+      extends CatalogServiceBaseDescriptorSupplier {
+    CatalogServiceFileDescriptorSupplier() {}
+  }
+
+  private static final class CatalogServiceMethodDescriptorSupplier
+      extends CatalogServiceBaseDescriptorSupplier
+      implements io.grpc.protobuf.ProtoMethodDescriptorSupplier {
+    private final String methodName;
+
+    CatalogServiceMethodDescriptorSupplier(String methodName) {
+      this.methodName = methodName;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.MethodDescriptor getMethodDescriptor() {
+      return getServiceDescriptor().findMethodByName(methodName);
+    }
+  }
+
+  private static volatile io.grpc.ServiceDescriptor serviceDescriptor;
+
+  public static io.grpc.ServiceDescriptor getServiceDescriptor() {
+    io.grpc.ServiceDescriptor result = serviceDescriptor;
+    if (result == null) {
+      synchronized (CatalogServiceGrpc.class) {
+        result = serviceDescriptor;
+        if (result == null) {
+          serviceDescriptor =
+              result =
+                  io.grpc.ServiceDescriptor.newBuilder(SERVICE_NAME)
+                      .setSchemaDescriptor(new CatalogServiceFileDescriptorSupplier())
+                      .addMethod(getListCatalogsMethod())
+                      .addMethod(getUpdateCatalogMethod())
+                      .build();
+        }
+      }
+    }
+    return result;
+  }
+}
diff --git a/grpc-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/PredictionServiceGrpc.java b/grpc-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/PredictionServiceGrpc.java
new file mode 100644
index 00000000..1548b2d3
--- /dev/null
+++ b/grpc-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/PredictionServiceGrpc.java
@@ -0,0 +1,355 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.google.cloud.retail.v2;
+
+import static io.grpc.MethodDescriptor.generateFullMethodName;
+import static io.grpc.stub.ClientCalls.asyncUnaryCall;
+import static io.grpc.stub.ClientCalls.blockingUnaryCall;
+import static io.grpc.stub.ClientCalls.futureUnaryCall;
+import static io.grpc.stub.ServerCalls.asyncUnaryCall;
+import static io.grpc.stub.ServerCalls.asyncUnimplementedUnaryCall;
+
+/**
+ *
+ *
+ * <pre>
+ * Service for making recommendation prediction.
+ * </pre>
+ */
+@javax.annotation.Generated(
+    value = "by gRPC proto compiler",
+    comments = "Source: google/cloud/retail/v2/prediction_service.proto")
+public final class PredictionServiceGrpc {
+
+  private PredictionServiceGrpc() {}
+
+  public static final String SERVICE_NAME = "google.cloud.retail.v2.PredictionService";
+
+  // Static method descriptors that strictly reflect the proto.
+  private static volatile io.grpc.MethodDescriptor<
+          com.google.cloud.retail.v2.PredictRequest, com.google.cloud.retail.v2.PredictResponse>
+      getPredictMethod;
+
+  @io.grpc.stub.annotations.RpcMethod(
+      fullMethodName = SERVICE_NAME + '/' + "Predict",
+      requestType = com.google.cloud.retail.v2.PredictRequest.class,
+      responseType = com.google.cloud.retail.v2.PredictResponse.class,
+      methodType = io.grpc.MethodDescriptor.MethodType.UNARY)
+  public static io.grpc.MethodDescriptor<
+          com.google.cloud.retail.v2.PredictRequest, com.google.cloud.retail.v2.PredictResponse>
+      getPredictMethod() {
+    io.grpc.MethodDescriptor<
+            com.google.cloud.retail.v2.PredictRequest, com.google.cloud.retail.v2.PredictResponse>
+        getPredictMethod;
+    if ((getPredictMethod = PredictionServiceGrpc.getPredictMethod) == null) {
+      synchronized (PredictionServiceGrpc.class) {
+        if ((getPredictMethod = PredictionServiceGrpc.getPredictMethod) == null) {
+          PredictionServiceGrpc.getPredictMethod =
+              getPredictMethod =
+                  io.grpc.MethodDescriptor
+                      .<com.google.cloud.retail.v2.PredictRequest,
+                          com.google.cloud.retail.v2.PredictResponse>
+                          newBuilder()
+                      .setType(io.grpc.MethodDescriptor.MethodType.UNARY)
+                      .setFullMethodName(generateFullMethodName(SERVICE_NAME, "Predict"))
+                      .setSampledToLocalTracing(true)
+                      .setRequestMarshaller(
+                          io.grpc.protobuf.ProtoUtils.marshaller(
+                              com.google.cloud.retail.v2.PredictRequest.getDefaultInstance()))
+                      .setResponseMarshaller(
+                          io.grpc.protobuf.ProtoUtils.marshaller(
+                              com.google.cloud.retail.v2.PredictResponse.getDefaultInstance()))
+                      .setSchemaDescriptor(new PredictionServiceMethodDescriptorSupplier("Predict"))
+                      .build();
+        }
+      }
+    }
+    return getPredictMethod;
+  }
+
+  /** Creates a new async stub that supports all call types for the service */
+  public static PredictionServiceStub newStub(io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<PredictionServiceStub> factory =
+        new io.grpc.stub.AbstractStub.StubFactory<PredictionServiceStub>() {
+          @java.lang.Override
+          public PredictionServiceStub newStub(
+              io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+            return new PredictionServiceStub(channel, callOptions);
+          }
+        };
+    return PredictionServiceStub.newStub(factory, channel);
+  }
+
+  /**
+   * Creates a new blocking-style stub that supports unary and streaming output calls on the service
+   */
+  public static PredictionServiceBlockingStub newBlockingStub(io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<PredictionServiceBlockingStub> factory =
+        new io.grpc.stub.AbstractStub.StubFactory<PredictionServiceBlockingStub>() {
+          @java.lang.Override
+          public PredictionServiceBlockingStub newStub(
+              io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+            return new PredictionServiceBlockingStub(channel, callOptions);
+          }
+        };
+    return PredictionServiceBlockingStub.newStub(factory, channel);
+  }
+
+  /** Creates a new ListenableFuture-style stub that supports unary calls on the service */
+  public static PredictionServiceFutureStub newFutureStub(io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<PredictionServiceFutureStub> factory =
+        new io.grpc.stub.AbstractStub.StubFactory<PredictionServiceFutureStub>() {
+          @java.lang.Override
+          public PredictionServiceFutureStub newStub(
+              io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+            return new PredictionServiceFutureStub(channel, callOptions);
+          }
+        };
+    return PredictionServiceFutureStub.newStub(factory, channel);
+  }
+
+  /**
+   *
+   *
+   * <pre>
+   * Service for making recommendation prediction.
+   * </pre>
+   */
+  public abstract static class PredictionServiceImplBase implements io.grpc.BindableService {
+
+    /**
+     *
+     *
+     * <pre>
+     * Makes a recommendation prediction.
+     * </pre>
+     */
+    public void predict(
+        com.google.cloud.retail.v2.PredictRequest request,
+        io.grpc.stub.StreamObserver<com.google.cloud.retail.v2.PredictResponse> responseObserver) {
+      asyncUnimplementedUnaryCall(getPredictMethod(), responseObserver);
+    }
+
+    @java.lang.Override
+    public final io.grpc.ServerServiceDefinition bindService() {
+      return io.grpc.ServerServiceDefinition.builder(getServiceDescriptor())
+          .addMethod(
+              getPredictMethod(),
+              asyncUnaryCall(
+                  new MethodHandlers<
+                      com.google.cloud.retail.v2.PredictRequest,
+                      com.google.cloud.retail.v2.PredictResponse>(this, METHODID_PREDICT)))
+          .build();
+    }
+  }
+
+  /**
+   *
+   *
+   * <pre>
+   * Service for making recommendation prediction.
+   * </pre>
+   */
+  public static final class PredictionServiceStub
+      extends io.grpc.stub.AbstractAsyncStub<PredictionServiceStub> {
+    private PredictionServiceStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected PredictionServiceStub build(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new PredictionServiceStub(channel, callOptions);
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * Makes a recommendation prediction.
+     * </pre>
+     */
+    public void predict(
+        com.google.cloud.retail.v2.PredictRequest request,
+        io.grpc.stub.StreamObserver<com.google.cloud.retail.v2.PredictResponse> responseObserver) {
+      asyncUnaryCall(
+          getChannel().newCall(getPredictMethod(), getCallOptions()), request, responseObserver);
+    }
+  }
+
+  /**
+   *
+   *
+   * <pre>
+   * Service for making recommendation prediction.
+   * </pre>
+   */
+  public static final class PredictionServiceBlockingStub
+      extends io.grpc.stub.AbstractBlockingStub<PredictionServiceBlockingStub> {
+    private PredictionServiceBlockingStub(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected PredictionServiceBlockingStub build(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new PredictionServiceBlockingStub(channel, callOptions);
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * Makes a recommendation prediction.
+     * </pre>
+     */
+    public com.google.cloud.retail.v2.PredictResponse predict(
+        com.google.cloud.retail.v2.PredictRequest request) {
+      return blockingUnaryCall(getChannel(), getPredictMethod(), getCallOptions(), request);
+    }
+  }
+
+  /**
+   *
+   *
+   * <pre>
+   * Service for making recommendation prediction.
+   * </pre>
+   */
+  public static final class PredictionServiceFutureStub
+      extends io.grpc.stub.AbstractFutureStub<PredictionServiceFutureStub> {
+    private PredictionServiceFutureStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected PredictionServiceFutureStub build(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new PredictionServiceFutureStub(channel, callOptions);
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * Makes a recommendation prediction.
+     * </pre>
+     */
+    public com.google.common.util.concurrent.ListenableFuture<
+            com.google.cloud.retail.v2.PredictResponse>
+        predict(com.google.cloud.retail.v2.PredictRequest request) {
+      return futureUnaryCall(getChannel().newCall(getPredictMethod(), getCallOptions()), request);
+    }
+  }
+
+  private static final int METHODID_PREDICT = 0;
+
+  private static final class MethodHandlers<Req, Resp>
+      implements io.grpc.stub.ServerCalls.UnaryMethod<Req, Resp>,
+          io.grpc.stub.ServerCalls.ServerStreamingMethod<Req, Resp>,
+          io.grpc.stub.ServerCalls.ClientStreamingMethod<Req, Resp>,
+          io.grpc.stub.ServerCalls.BidiStreamingMethod<Req, Resp> {
+    private final PredictionServiceImplBase serviceImpl;
+    private final int methodId;
+
+    MethodHandlers(PredictionServiceImplBase serviceImpl, int methodId) {
+      this.serviceImpl = serviceImpl;
+      this.methodId = methodId;
+    }
+
+    @java.lang.Override
+    @java.lang.SuppressWarnings("unchecked")
+    public void invoke(Req request, io.grpc.stub.StreamObserver<Resp> responseObserver) {
+      switch (methodId) {
+        case METHODID_PREDICT:
+          serviceImpl.predict(
+              (com.google.cloud.retail.v2.PredictRequest) request,
+              (io.grpc.stub.StreamObserver<com.google.cloud.retail.v2.PredictResponse>)
+                  responseObserver);
+          break;
+        default:
+          throw new AssertionError();
+      }
+    }
+
+    @java.lang.Override
+    @java.lang.SuppressWarnings("unchecked")
+    public io.grpc.stub.StreamObserver<Req> invoke(
+        io.grpc.stub.StreamObserver<Resp> responseObserver) {
+      switch (methodId) {
+        default:
+          throw new AssertionError();
+      }
+    }
+  }
+
+  private abstract static class PredictionServiceBaseDescriptorSupplier
+      implements io.grpc.protobuf.ProtoFileDescriptorSupplier,
+          io.grpc.protobuf.ProtoServiceDescriptorSupplier {
+    PredictionServiceBaseDescriptorSupplier() {}
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.FileDescriptor getFileDescriptor() {
+      return com.google.cloud.retail.v2.PredictionServiceProto.getDescriptor();
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.ServiceDescriptor getServiceDescriptor() {
+      return getFileDescriptor().findServiceByName("PredictionService");
+    }
+  }
+
+  private static final class PredictionServiceFileDescriptorSupplier
+      extends PredictionServiceBaseDescriptorSupplier {
+    PredictionServiceFileDescriptorSupplier() {}
+  }
+
+  private static final class PredictionServiceMethodDescriptorSupplier
+      extends PredictionServiceBaseDescriptorSupplier
+      implements io.grpc.protobuf.ProtoMethodDescriptorSupplier {
+    private final String methodName;
+
+    PredictionServiceMethodDescriptorSupplier(String methodName) {
+      this.methodName = methodName;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.MethodDescriptor getMethodDescriptor() {
+      return getServiceDescriptor().findMethodByName(methodName);
+    }
+  }
+
+  private static volatile io.grpc.ServiceDescriptor serviceDescriptor;
+
+  public static io.grpc.ServiceDescriptor getServiceDescriptor() {
+    io.grpc.ServiceDescriptor result = serviceDescriptor;
+    if (result == null) {
+      synchronized (PredictionServiceGrpc.class) {
+        result = serviceDescriptor;
+        if (result == null) {
+          serviceDescriptor =
+              result =
+                  io.grpc.ServiceDescriptor.newBuilder(SERVICE_NAME)
+                      .setSchemaDescriptor(new PredictionServiceFileDescriptorSupplier())
+                      .addMethod(getPredictMethod())
+                      .build();
+        }
+      }
+    }
+    return result;
+  }
+}
diff --git a/grpc-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ProductServiceGrpc.java b/grpc-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ProductServiceGrpc.java
new file mode 100644
index 00000000..33272d71
--- /dev/null
+++ b/grpc-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ProductServiceGrpc.java
@@ -0,0 +1,809 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.google.cloud.retail.v2;
+
+import static io.grpc.MethodDescriptor.generateFullMethodName;
+import static io.grpc.stub.ClientCalls.asyncUnaryCall;
+import static io.grpc.stub.ClientCalls.blockingUnaryCall;
+import static io.grpc.stub.ClientCalls.futureUnaryCall;
+import static io.grpc.stub.ServerCalls.asyncUnaryCall;
+import static io.grpc.stub.ServerCalls.asyncUnimplementedUnaryCall;
+
+/**
+ *
+ *
+ * <pre>
+ * Service for ingesting [Product][google.cloud.retail.v2.Product] information
+ * of the customer's website.
+ * </pre>
+ */
+@javax.annotation.Generated(
+    value = "by gRPC proto compiler",
+    comments = "Source: google/cloud/retail/v2/product_service.proto")
+public final class ProductServiceGrpc {
+
+  private ProductServiceGrpc() {}
+
+  public static final String SERVICE_NAME = "google.cloud.retail.v2.ProductService";
+
+  // Static method descriptors that strictly reflect the proto.
+  private static volatile io.grpc.MethodDescriptor<
+          com.google.cloud.retail.v2.CreateProductRequest, com.google.cloud.retail.v2.Product>
+      getCreateProductMethod;
+
+  @io.grpc.stub.annotations.RpcMethod(
+      fullMethodName = SERVICE_NAME + '/' + "CreateProduct",
+      requestType = com.google.cloud.retail.v2.CreateProductRequest.class,
+      responseType = com.google.cloud.retail.v2.Product.class,
+      methodType = io.grpc.MethodDescriptor.MethodType.UNARY)
+  public static io.grpc.MethodDescriptor<
+          com.google.cloud.retail.v2.CreateProductRequest, com.google.cloud.retail.v2.Product>
+      getCreateProductMethod() {
+    io.grpc.MethodDescriptor<
+            com.google.cloud.retail.v2.CreateProductRequest, com.google.cloud.retail.v2.Product>
+        getCreateProductMethod;
+    if ((getCreateProductMethod = ProductServiceGrpc.getCreateProductMethod) == null) {
+      synchronized (ProductServiceGrpc.class) {
+        if ((getCreateProductMethod = ProductServiceGrpc.getCreateProductMethod) == null) {
+          ProductServiceGrpc.getCreateProductMethod =
+              getCreateProductMethod =
+                  io.grpc.MethodDescriptor
+                      .<com.google.cloud.retail.v2.CreateProductRequest,
+                          com.google.cloud.retail.v2.Product>
+                          newBuilder()
+                      .setType(io.grpc.MethodDescriptor.MethodType.UNARY)
+                      .setFullMethodName(generateFullMethodName(SERVICE_NAME, "CreateProduct"))
+                      .setSampledToLocalTracing(true)
+                      .setRequestMarshaller(
+                          io.grpc.protobuf.ProtoUtils.marshaller(
+                              com.google.cloud.retail.v2.CreateProductRequest.getDefaultInstance()))
+                      .setResponseMarshaller(
+                          io.grpc.protobuf.ProtoUtils.marshaller(
+                              com.google.cloud.retail.v2.Product.getDefaultInstance()))
+                      .setSchemaDescriptor(
+                          new ProductServiceMethodDescriptorSupplier("CreateProduct"))
+                      .build();
+        }
+      }
+    }
+    return getCreateProductMethod;
+  }
+
+  private static volatile io.grpc.MethodDescriptor<
+          com.google.cloud.retail.v2.GetProductRequest, com.google.cloud.retail.v2.Product>
+      getGetProductMethod;
+
+  @io.grpc.stub.annotations.RpcMethod(
+      fullMethodName = SERVICE_NAME + '/' + "GetProduct",
+      requestType = com.google.cloud.retail.v2.GetProductRequest.class,
+      responseType = com.google.cloud.retail.v2.Product.class,
+      methodType = io.grpc.MethodDescriptor.MethodType.UNARY)
+  public static io.grpc.MethodDescriptor<
+          com.google.cloud.retail.v2.GetProductRequest, com.google.cloud.retail.v2.Product>
+      getGetProductMethod() {
+    io.grpc.MethodDescriptor<
+            com.google.cloud.retail.v2.GetProductRequest, com.google.cloud.retail.v2.Product>
+        getGetProductMethod;
+    if ((getGetProductMethod = ProductServiceGrpc.getGetProductMethod) == null) {
+      synchronized (ProductServiceGrpc.class) {
+        if ((getGetProductMethod = ProductServiceGrpc.getGetProductMethod) == null) {
+          ProductServiceGrpc.getGetProductMethod =
+              getGetProductMethod =
+                  io.grpc.MethodDescriptor
+                      .<com.google.cloud.retail.v2.GetProductRequest,
+                          com.google.cloud.retail.v2.Product>
+                          newBuilder()
+                      .setType(io.grpc.MethodDescriptor.MethodType.UNARY)
+                      .setFullMethodName(generateFullMethodName(SERVICE_NAME, "GetProduct"))
+                      .setSampledToLocalTracing(true)
+                      .setRequestMarshaller(
+                          io.grpc.protobuf.ProtoUtils.marshaller(
+                              com.google.cloud.retail.v2.GetProductRequest.getDefaultInstance()))
+                      .setResponseMarshaller(
+                          io.grpc.protobuf.ProtoUtils.marshaller(
+                              com.google.cloud.retail.v2.Product.getDefaultInstance()))
+                      .setSchemaDescriptor(new ProductServiceMethodDescriptorSupplier("GetProduct"))
+                      .build();
+        }
+      }
+    }
+    return getGetProductMethod;
+  }
+
+  private static volatile io.grpc.MethodDescriptor<
+          com.google.cloud.retail.v2.UpdateProductRequest, com.google.cloud.retail.v2.Product>
+      getUpdateProductMethod;
+
+  @io.grpc.stub.annotations.RpcMethod(
+      fullMethodName = SERVICE_NAME + '/' + "UpdateProduct",
+      requestType = com.google.cloud.retail.v2.UpdateProductRequest.class,
+      responseType = com.google.cloud.retail.v2.Product.class,
+      methodType = io.grpc.MethodDescriptor.MethodType.UNARY)
+  public static io.grpc.MethodDescriptor<
+          com.google.cloud.retail.v2.UpdateProductRequest, com.google.cloud.retail.v2.Product>
+      getUpdateProductMethod() {
+    io.grpc.MethodDescriptor<
+            com.google.cloud.retail.v2.UpdateProductRequest, com.google.cloud.retail.v2.Product>
+        getUpdateProductMethod;
+    if ((getUpdateProductMethod = ProductServiceGrpc.getUpdateProductMethod) == null) {
+      synchronized (ProductServiceGrpc.class) {
+        if ((getUpdateProductMethod = ProductServiceGrpc.getUpdateProductMethod) == null) {
+          ProductServiceGrpc.getUpdateProductMethod =
+              getUpdateProductMethod =
+                  io.grpc.MethodDescriptor
+                      .<com.google.cloud.retail.v2.UpdateProductRequest,
+                          com.google.cloud.retail.v2.Product>
+                          newBuilder()
+                      .setType(io.grpc.MethodDescriptor.MethodType.UNARY)
+                      .setFullMethodName(generateFullMethodName(SERVICE_NAME, "UpdateProduct"))
+                      .setSampledToLocalTracing(true)
+                      .setRequestMarshaller(
+                          io.grpc.protobuf.ProtoUtils.marshaller(
+                              com.google.cloud.retail.v2.UpdateProductRequest.getDefaultInstance()))
+                      .setResponseMarshaller(
+                          io.grpc.protobuf.ProtoUtils.marshaller(
+                              com.google.cloud.retail.v2.Product.getDefaultInstance()))
+                      .setSchemaDescriptor(
+                          new ProductServiceMethodDescriptorSupplier("UpdateProduct"))
+                      .build();
+        }
+      }
+    }
+    return getUpdateProductMethod;
+  }
+
+  private static volatile io.grpc.MethodDescriptor<
+          com.google.cloud.retail.v2.DeleteProductRequest, com.google.protobuf.Empty>
+      getDeleteProductMethod;
+
+  @io.grpc.stub.annotations.RpcMethod(
+      fullMethodName = SERVICE_NAME + '/' + "DeleteProduct",
+      requestType = com.google.cloud.retail.v2.DeleteProductRequest.class,
+      responseType = com.google.protobuf.Empty.class,
+      methodType = io.grpc.MethodDescriptor.MethodType.UNARY)
+  public static io.grpc.MethodDescriptor<
+          com.google.cloud.retail.v2.DeleteProductRequest, com.google.protobuf.Empty>
+      getDeleteProductMethod() {
+    io.grpc.MethodDescriptor<
+            com.google.cloud.retail.v2.DeleteProductRequest, com.google.protobuf.Empty>
+        getDeleteProductMethod;
+    if ((getDeleteProductMethod = ProductServiceGrpc.getDeleteProductMethod) == null) {
+      synchronized (ProductServiceGrpc.class) {
+        if ((getDeleteProductMethod = ProductServiceGrpc.getDeleteProductMethod) == null) {
+          ProductServiceGrpc.getDeleteProductMethod =
+              getDeleteProductMethod =
+                  io.grpc.MethodDescriptor
+                      .<com.google.cloud.retail.v2.DeleteProductRequest, com.google.protobuf.Empty>
+                          newBuilder()
+                      .setType(io.grpc.MethodDescriptor.MethodType.UNARY)
+                      .setFullMethodName(generateFullMethodName(SERVICE_NAME, "DeleteProduct"))
+                      .setSampledToLocalTracing(true)
+                      .setRequestMarshaller(
+                          io.grpc.protobuf.ProtoUtils.marshaller(
+                              com.google.cloud.retail.v2.DeleteProductRequest.getDefaultInstance()))
+                      .setResponseMarshaller(
+                          io.grpc.protobuf.ProtoUtils.marshaller(
+                              com.google.protobuf.Empty.getDefaultInstance()))
+                      .setSchemaDescriptor(
+                          new ProductServiceMethodDescriptorSupplier("DeleteProduct"))
+                      .build();
+        }
+      }
+    }
+    return getDeleteProductMethod;
+  }
+
+  private static volatile io.grpc.MethodDescriptor<
+          com.google.cloud.retail.v2.ImportProductsRequest, com.google.longrunning.Operation>
+      getImportProductsMethod;
+
+  @io.grpc.stub.annotations.RpcMethod(
+      fullMethodName = SERVICE_NAME + '/' + "ImportProducts",
+      requestType = com.google.cloud.retail.v2.ImportProductsRequest.class,
+      responseType = com.google.longrunning.Operation.class,
+      methodType = io.grpc.MethodDescriptor.MethodType.UNARY)
+  public static io.grpc.MethodDescriptor<
+          com.google.cloud.retail.v2.ImportProductsRequest, com.google.longrunning.Operation>
+      getImportProductsMethod() {
+    io.grpc.MethodDescriptor<
+            com.google.cloud.retail.v2.ImportProductsRequest, com.google.longrunning.Operation>
+        getImportProductsMethod;
+    if ((getImportProductsMethod = ProductServiceGrpc.getImportProductsMethod) == null) {
+      synchronized (ProductServiceGrpc.class) {
+        if ((getImportProductsMethod = ProductServiceGrpc.getImportProductsMethod) == null) {
+          ProductServiceGrpc.getImportProductsMethod =
+              getImportProductsMethod =
+                  io.grpc.MethodDescriptor
+                      .<com.google.cloud.retail.v2.ImportProductsRequest,
+                          com.google.longrunning.Operation>
+                          newBuilder()
+                      .setType(io.grpc.MethodDescriptor.MethodType.UNARY)
+                      .setFullMethodName(generateFullMethodName(SERVICE_NAME, "ImportProducts"))
+                      .setSampledToLocalTracing(true)
+                      .setRequestMarshaller(
+                          io.grpc.protobuf.ProtoUtils.marshaller(
+                              com.google.cloud.retail.v2.ImportProductsRequest
+                                  .getDefaultInstance()))
+                      .setResponseMarshaller(
+                          io.grpc.protobuf.ProtoUtils.marshaller(
+                              com.google.longrunning.Operation.getDefaultInstance()))
+                      .setSchemaDescriptor(
+                          new ProductServiceMethodDescriptorSupplier("ImportProducts"))
+                      .build();
+        }
+      }
+    }
+    return getImportProductsMethod;
+  }
+
+  /** Creates a new async stub that supports all call types for the service */
+  public static ProductServiceStub newStub(io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<ProductServiceStub> factory =
+        new io.grpc.stub.AbstractStub.StubFactory<ProductServiceStub>() {
+          @java.lang.Override
+          public ProductServiceStub newStub(
+              io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+            return new ProductServiceStub(channel, callOptions);
+          }
+        };
+    return ProductServiceStub.newStub(factory, channel);
+  }
+
+  /**
+   * Creates a new blocking-style stub that supports unary and streaming output calls on the service
+   */
+  public static ProductServiceBlockingStub newBlockingStub(io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<ProductServiceBlockingStub> factory =
+        new io.grpc.stub.AbstractStub.StubFactory<ProductServiceBlockingStub>() {
+          @java.lang.Override
+          public ProductServiceBlockingStub newStub(
+              io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+            return new ProductServiceBlockingStub(channel, callOptions);
+          }
+        };
+    return ProductServiceBlockingStub.newStub(factory, channel);
+  }
+
+  /** Creates a new ListenableFuture-style stub that supports unary calls on the service */
+  public static ProductServiceFutureStub newFutureStub(io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<ProductServiceFutureStub> factory =
+        new io.grpc.stub.AbstractStub.StubFactory<ProductServiceFutureStub>() {
+          @java.lang.Override
+          public ProductServiceFutureStub newStub(
+              io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+            return new ProductServiceFutureStub(channel, callOptions);
+          }
+        };
+    return ProductServiceFutureStub.newStub(factory, channel);
+  }
+
+  /**
+   *
+   *
+   * <pre>
+   * Service for ingesting [Product][google.cloud.retail.v2.Product] information
+   * of the customer's website.
+   * </pre>
+   */
+  public abstract static class ProductServiceImplBase implements io.grpc.BindableService {
+
+    /**
+     *
+     *
+     * <pre>
+     * Creates a [Product][google.cloud.retail.v2.Product].
+     * </pre>
+     */
+    public void createProduct(
+        com.google.cloud.retail.v2.CreateProductRequest request,
+        io.grpc.stub.StreamObserver<com.google.cloud.retail.v2.Product> responseObserver) {
+      asyncUnimplementedUnaryCall(getCreateProductMethod(), responseObserver);
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * Gets a [Product][google.cloud.retail.v2.Product].
+     * </pre>
+     */
+    public void getProduct(
+        com.google.cloud.retail.v2.GetProductRequest request,
+        io.grpc.stub.StreamObserver<com.google.cloud.retail.v2.Product> responseObserver) {
+      asyncUnimplementedUnaryCall(getGetProductMethod(), responseObserver);
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * Updates a [Product][google.cloud.retail.v2.Product].
+     * </pre>
+     */
+    public void updateProduct(
+        com.google.cloud.retail.v2.UpdateProductRequest request,
+        io.grpc.stub.StreamObserver<com.google.cloud.retail.v2.Product> responseObserver) {
+      asyncUnimplementedUnaryCall(getUpdateProductMethod(), responseObserver);
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * Deletes a [Product][google.cloud.retail.v2.Product].
+     * </pre>
+     */
+    public void deleteProduct(
+        com.google.cloud.retail.v2.DeleteProductRequest request,
+        io.grpc.stub.StreamObserver<com.google.protobuf.Empty> responseObserver) {
+      asyncUnimplementedUnaryCall(getDeleteProductMethod(), responseObserver);
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * Bulk import of multiple [Product][google.cloud.retail.v2.Product]s.
+     * Request processing may be synchronous. No partial updating is supported.
+     * Non-existing items are created.
+     * Note that it is possible for a subset of the
+     * [Product][google.cloud.retail.v2.Product]s to be successfully updated.
+     * </pre>
+     */
+    public void importProducts(
+        com.google.cloud.retail.v2.ImportProductsRequest request,
+        io.grpc.stub.StreamObserver<com.google.longrunning.Operation> responseObserver) {
+      asyncUnimplementedUnaryCall(getImportProductsMethod(), responseObserver);
+    }
+
+    @java.lang.Override
+    public final io.grpc.ServerServiceDefinition bindService() {
+      return io.grpc.ServerServiceDefinition.builder(getServiceDescriptor())
+          .addMethod(
+              getCreateProductMethod(),
+              asyncUnaryCall(
+                  new MethodHandlers<
+                      com.google.cloud.retail.v2.CreateProductRequest,
+                      com.google.cloud.retail.v2.Product>(this, METHODID_CREATE_PRODUCT)))
+          .addMethod(
+              getGetProductMethod(),
+              asyncUnaryCall(
+                  new MethodHandlers<
+                      com.google.cloud.retail.v2.GetProductRequest,
+                      com.google.cloud.retail.v2.Product>(this, METHODID_GET_PRODUCT)))
+          .addMethod(
+              getUpdateProductMethod(),
+              asyncUnaryCall(
+                  new MethodHandlers<
+                      com.google.cloud.retail.v2.UpdateProductRequest,
+                      com.google.cloud.retail.v2.Product>(this, METHODID_UPDATE_PRODUCT)))
+          .addMethod(
+              getDeleteProductMethod(),
+              asyncUnaryCall(
+                  new MethodHandlers<
+                      com.google.cloud.retail.v2.DeleteProductRequest, com.google.protobuf.Empty>(
+                      this, METHODID_DELETE_PRODUCT)))
+          .addMethod(
+              getImportProductsMethod(),
+              asyncUnaryCall(
+                  new MethodHandlers<
+                      com.google.cloud.retail.v2.ImportProductsRequest,
+                      com.google.longrunning.Operation>(this, METHODID_IMPORT_PRODUCTS)))
+          .build();
+    }
+  }
+
+  /**
+   *
+   *
+   * <pre>
+   * Service for ingesting [Product][google.cloud.retail.v2.Product] information
+   * of the customer's website.
+   * </pre>
+   */
+  public static final class ProductServiceStub
+      extends io.grpc.stub.AbstractAsyncStub<ProductServiceStub> {
+    private ProductServiceStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected ProductServiceStub build(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new ProductServiceStub(channel, callOptions);
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * Creates a [Product][google.cloud.retail.v2.Product].
+     * </pre>
+     */
+    public void createProduct(
+        com.google.cloud.retail.v2.CreateProductRequest request,
+        io.grpc.stub.StreamObserver<com.google.cloud.retail.v2.Product> responseObserver) {
+      asyncUnaryCall(
+          getChannel().newCall(getCreateProductMethod(), getCallOptions()),
+          request,
+          responseObserver);
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * Gets a [Product][google.cloud.retail.v2.Product].
+     * </pre>
+     */
+    public void getProduct(
+        com.google.cloud.retail.v2.GetProductRequest request,
+        io.grpc.stub.StreamObserver<com.google.cloud.retail.v2.Product> responseObserver) {
+      asyncUnaryCall(
+          getChannel().newCall(getGetProductMethod(), getCallOptions()), request, responseObserver);
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * Updates a [Product][google.cloud.retail.v2.Product].
+     * </pre>
+     */
+    public void updateProduct(
+        com.google.cloud.retail.v2.UpdateProductRequest request,
+        io.grpc.stub.StreamObserver<com.google.cloud.retail.v2.Product> responseObserver) {
+      asyncUnaryCall(
+          getChannel().newCall(getUpdateProductMethod(), getCallOptions()),
+          request,
+          responseObserver);
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * Deletes a [Product][google.cloud.retail.v2.Product].
+     * </pre>
+     */
+    public void deleteProduct(
+        com.google.cloud.retail.v2.DeleteProductRequest request,
+        io.grpc.stub.StreamObserver<com.google.protobuf.Empty> responseObserver) {
+      asyncUnaryCall(
+          getChannel().newCall(getDeleteProductMethod(), getCallOptions()),
+          request,
+          responseObserver);
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * Bulk import of multiple [Product][google.cloud.retail.v2.Product]s.
+     * Request processing may be synchronous. No partial updating is supported.
+     * Non-existing items are created.
+     * Note that it is possible for a subset of the
+     * [Product][google.cloud.retail.v2.Product]s to be successfully updated.
+     * </pre>
+     */
+    public void importProducts(
+        com.google.cloud.retail.v2.ImportProductsRequest request,
+        io.grpc.stub.StreamObserver<com.google.longrunning.Operation> responseObserver) {
+      asyncUnaryCall(
+          getChannel().newCall(getImportProductsMethod(), getCallOptions()),
+          request,
+          responseObserver);
+    }
+  }
+
+  /**
+   *
+   *
+   * <pre>
+   * Service for ingesting [Product][google.cloud.retail.v2.Product] information
+   * of the customer's website.
+   * </pre>
+   */
+  public static final class ProductServiceBlockingStub
+      extends io.grpc.stub.AbstractBlockingStub<ProductServiceBlockingStub> {
+    private ProductServiceBlockingStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected ProductServiceBlockingStub build(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new ProductServiceBlockingStub(channel, callOptions);
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * Creates a [Product][google.cloud.retail.v2.Product].
+     * </pre>
+     */
+    public com.google.cloud.retail.v2.Product createProduct(
+        com.google.cloud.retail.v2.CreateProductRequest request) {
+      return blockingUnaryCall(getChannel(), getCreateProductMethod(), getCallOptions(), request);
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * Gets a [Product][google.cloud.retail.v2.Product].
+     * </pre>
+     */
+    public com.google.cloud.retail.v2.Product getProduct(
+        com.google.cloud.retail.v2.GetProductRequest request) {
+      return blockingUnaryCall(getChannel(), getGetProductMethod(), getCallOptions(), request);
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * Updates a [Product][google.cloud.retail.v2.Product].
+     * </pre>
+     */
+    public com.google.cloud.retail.v2.Product updateProduct(
+        com.google.cloud.retail.v2.UpdateProductRequest request) {
+      return blockingUnaryCall(getChannel(), getUpdateProductMethod(), getCallOptions(), request);
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * Deletes a [Product][google.cloud.retail.v2.Product].
+     * </pre>
+     */
+    public com.google.protobuf.Empty deleteProduct(
+        com.google.cloud.retail.v2.DeleteProductRequest request) {
+      return blockingUnaryCall(getChannel(), getDeleteProductMethod(), getCallOptions(), request);
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * Bulk import of multiple [Product][google.cloud.retail.v2.Product]s.
+     * Request processing may be synchronous. No partial updating is supported.
+     * Non-existing items are created.
+     * Note that it is possible for a subset of the
+     * [Product][google.cloud.retail.v2.Product]s to be successfully updated.
+     * </pre>
+     */
+    public com.google.longrunning.Operation importProducts(
+        com.google.cloud.retail.v2.ImportProductsRequest request) {
+      return blockingUnaryCall(getChannel(), getImportProductsMethod(), getCallOptions(), request);
+    }
+  }
+
+  /**
+   *
+   *
+   * <pre>
+   * Service for ingesting [Product][google.cloud.retail.v2.Product] information
+   * of the customer's website.
+   * </pre>
+   */
+  public static final class ProductServiceFutureStub
+      extends io.grpc.stub.AbstractFutureStub<ProductServiceFutureStub> {
+    private ProductServiceFutureStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected ProductServiceFutureStub build(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new ProductServiceFutureStub(channel, callOptions);
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * Creates a [Product][google.cloud.retail.v2.Product].
+     * </pre>
+     */
+    public com.google.common.util.concurrent.ListenableFuture<com.google.cloud.retail.v2.Product>
+        createProduct(com.google.cloud.retail.v2.CreateProductRequest request) {
+      return futureUnaryCall(
+          getChannel().newCall(getCreateProductMethod(), getCallOptions()), request);
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * Gets a [Product][google.cloud.retail.v2.Product].
+     * </pre>
+     */
+    public com.google.common.util.concurrent.ListenableFuture<com.google.cloud.retail.v2.Product>
+        getProduct(com.google.cloud.retail.v2.GetProductRequest request) {
+      return futureUnaryCall(
+          getChannel().newCall(getGetProductMethod(), getCallOptions()), request);
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * Updates a [Product][google.cloud.retail.v2.Product].
+     * </pre>
+     */
+    public com.google.common.util.concurrent.ListenableFuture<com.google.cloud.retail.v2.Product>
+        updateProduct(com.google.cloud.retail.v2.UpdateProductRequest request) {
+      return futureUnaryCall(
+          getChannel().newCall(getUpdateProductMethod(), getCallOptions()), request);
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * Deletes a [Product][google.cloud.retail.v2.Product].
+     * </pre>
+     */
+    public com.google.common.util.concurrent.ListenableFuture<com.google.protobuf.Empty>
+        deleteProduct(com.google.cloud.retail.v2.DeleteProductRequest request) {
+      return futureUnaryCall(
+          getChannel().newCall(getDeleteProductMethod(), getCallOptions()), request);
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * Bulk import of multiple [Product][google.cloud.retail.v2.Product]s.
+     * Request processing may be synchronous. No partial updating is supported.
+     * Non-existing items are created.
+     * Note that it is possible for a subset of the
+     * [Product][google.cloud.retail.v2.Product]s to be successfully updated.
+     * </pre>
+     */
+    public com.google.common.util.concurrent.ListenableFuture<com.google.longrunning.Operation>
+        importProducts(com.google.cloud.retail.v2.ImportProductsRequest request) {
+      return futureUnaryCall(
+          getChannel().newCall(getImportProductsMethod(), getCallOptions()), request);
+    }
+  }
+
+  private static final int METHODID_CREATE_PRODUCT = 0;
+  private static final int METHODID_GET_PRODUCT = 1;
+  private static final int METHODID_UPDATE_PRODUCT = 2;
+  private static final int METHODID_DELETE_PRODUCT = 3;
+  private static final int METHODID_IMPORT_PRODUCTS = 4;
+
+  private static final class MethodHandlers<Req, Resp>
+      implements io.grpc.stub.ServerCalls.UnaryMethod<Req, Resp>,
+          io.grpc.stub.ServerCalls.ServerStreamingMethod<Req, Resp>,
+          io.grpc.stub.ServerCalls.ClientStreamingMethod<Req, Resp>,
+          io.grpc.stub.ServerCalls.BidiStreamingMethod<Req, Resp> {
+    private final ProductServiceImplBase serviceImpl;
+    private final int methodId;
+
+    MethodHandlers(ProductServiceImplBase serviceImpl, int methodId) {
+      this.serviceImpl = serviceImpl;
+      this.methodId = methodId;
+    }
+
+    @java.lang.Override
+    @java.lang.SuppressWarnings("unchecked")
+    public void invoke(Req request, io.grpc.stub.StreamObserver<Resp> responseObserver) {
+      switch (methodId) {
+        case METHODID_CREATE_PRODUCT:
+          serviceImpl.createProduct(
+              (com.google.cloud.retail.v2.CreateProductRequest) request,
+              (io.grpc.stub.StreamObserver<com.google.cloud.retail.v2.Product>) responseObserver);
+          break;
+        case METHODID_GET_PRODUCT:
+          serviceImpl.getProduct(
+              (com.google.cloud.retail.v2.GetProductRequest) request,
+              (io.grpc.stub.StreamObserver<com.google.cloud.retail.v2.Product>) responseObserver);
+          break;
+        case METHODID_UPDATE_PRODUCT:
+          serviceImpl.updateProduct(
+              (com.google.cloud.retail.v2.UpdateProductRequest) request,
+              (io.grpc.stub.StreamObserver<com.google.cloud.retail.v2.Product>) responseObserver);
+          break;
+        case METHODID_DELETE_PRODUCT:
+          serviceImpl.deleteProduct(
+              (com.google.cloud.retail.v2.DeleteProductRequest) request,
+              (io.grpc.stub.StreamObserver<com.google.protobuf.Empty>) responseObserver);
+          break;
+        case METHODID_IMPORT_PRODUCTS:
+          serviceImpl.importProducts(
+              (com.google.cloud.retail.v2.ImportProductsRequest) request,
+              (io.grpc.stub.StreamObserver<com.google.longrunning.Operation>) responseObserver);
+          break;
+        default:
+          throw new AssertionError();
+      }
+    }
+
+    @java.lang.Override
+    @java.lang.SuppressWarnings("unchecked")
+    public io.grpc.stub.StreamObserver<Req> invoke(
+        io.grpc.stub.StreamObserver<Resp> responseObserver) {
+      switch (methodId) {
+        default:
+          throw new AssertionError();
+      }
+    }
+  }
+
+  private abstract static class ProductServiceBaseDescriptorSupplier
+      implements io.grpc.protobuf.ProtoFileDescriptorSupplier,
+          io.grpc.protobuf.ProtoServiceDescriptorSupplier {
+    ProductServiceBaseDescriptorSupplier() {}
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.FileDescriptor getFileDescriptor() {
+      return com.google.cloud.retail.v2.ProductServiceProto.getDescriptor();
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.ServiceDescriptor getServiceDescriptor() {
+      return getFileDescriptor().findServiceByName("ProductService");
+    }
+  }
+
+  private static final class ProductServiceFileDescriptorSupplier
+      extends ProductServiceBaseDescriptorSupplier {
+    ProductServiceFileDescriptorSupplier() {}
+  }
+
+  private static final class ProductServiceMethodDescriptorSupplier
+      extends ProductServiceBaseDescriptorSupplier
+      implements io.grpc.protobuf.ProtoMethodDescriptorSupplier {
+    private final String methodName;
+
+    ProductServiceMethodDescriptorSupplier(String methodName) {
+      this.methodName = methodName;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.MethodDescriptor getMethodDescriptor() {
+      return getServiceDescriptor().findMethodByName(methodName);
+    }
+  }
+
+  private static volatile io.grpc.ServiceDescriptor serviceDescriptor;
+
+  public static io.grpc.ServiceDescriptor getServiceDescriptor() {
+    io.grpc.ServiceDescriptor result = serviceDescriptor;
+    if (result == null) {
+      synchronized (ProductServiceGrpc.class) {
+        result = serviceDescriptor;
+        if (result == null) {
+          serviceDescriptor =
+              result =
+                  io.grpc.ServiceDescriptor.newBuilder(SERVICE_NAME)
+                      .setSchemaDescriptor(new ProductServiceFileDescriptorSupplier())
+                      .addMethod(getCreateProductMethod())
+                      .addMethod(getGetProductMethod())
+                      .addMethod(getUpdateProductMethod())
+                      .addMethod(getDeleteProductMethod())
+                      .addMethod(getImportProductsMethod())
+                      .build();
+        }
+      }
+    }
+    return result;
+  }
+}
diff --git a/grpc-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/UserEventServiceGrpc.java b/grpc-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/UserEventServiceGrpc.java
new file mode 100644
index 00000000..827caba3
--- /dev/null
+++ b/grpc-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/UserEventServiceGrpc.java
@@ -0,0 +1,866 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.google.cloud.retail.v2;
+
+import static io.grpc.MethodDescriptor.generateFullMethodName;
+import static io.grpc.stub.ClientCalls.asyncUnaryCall;
+import static io.grpc.stub.ClientCalls.blockingUnaryCall;
+import static io.grpc.stub.ClientCalls.futureUnaryCall;
+import static io.grpc.stub.ServerCalls.asyncUnaryCall;
+import static io.grpc.stub.ServerCalls.asyncUnimplementedUnaryCall;
+
+/**
+ *
+ *
+ * <pre>
+ * Service for ingesting end user actions on the customer website.
+ * </pre>
+ */
+@javax.annotation.Generated(
+    value = "by gRPC proto compiler",
+    comments = "Source: google/cloud/retail/v2/user_event_service.proto")
+public final class UserEventServiceGrpc {
+
+  private UserEventServiceGrpc() {}
+
+  public static final String SERVICE_NAME = "google.cloud.retail.v2.UserEventService";
+
+  // Static method descriptors that strictly reflect the proto.
+  private static volatile io.grpc.MethodDescriptor<
+          com.google.cloud.retail.v2.WriteUserEventRequest, com.google.cloud.retail.v2.UserEvent>
+      getWriteUserEventMethod;
+
+  @io.grpc.stub.annotations.RpcMethod(
+      fullMethodName = SERVICE_NAME + '/' + "WriteUserEvent",
+      requestType = com.google.cloud.retail.v2.WriteUserEventRequest.class,
+      responseType = com.google.cloud.retail.v2.UserEvent.class,
+      methodType = io.grpc.MethodDescriptor.MethodType.UNARY)
+  public static io.grpc.MethodDescriptor<
+          com.google.cloud.retail.v2.WriteUserEventRequest, com.google.cloud.retail.v2.UserEvent>
+      getWriteUserEventMethod() {
+    io.grpc.MethodDescriptor<
+            com.google.cloud.retail.v2.WriteUserEventRequest, com.google.cloud.retail.v2.UserEvent>
+        getWriteUserEventMethod;
+    if ((getWriteUserEventMethod = UserEventServiceGrpc.getWriteUserEventMethod) == null) {
+      synchronized (UserEventServiceGrpc.class) {
+        if ((getWriteUserEventMethod = UserEventServiceGrpc.getWriteUserEventMethod) == null) {
+          UserEventServiceGrpc.getWriteUserEventMethod =
+              getWriteUserEventMethod =
+                  io.grpc.MethodDescriptor
+                      .<com.google.cloud.retail.v2.WriteUserEventRequest,
+                          com.google.cloud.retail.v2.UserEvent>
+                          newBuilder()
+                      .setType(io.grpc.MethodDescriptor.MethodType.UNARY)
+                      .setFullMethodName(generateFullMethodName(SERVICE_NAME, "WriteUserEvent"))
+                      .setSampledToLocalTracing(true)
+                      .setRequestMarshaller(
+                          io.grpc.protobuf.ProtoUtils.marshaller(
+                              com.google.cloud.retail.v2.WriteUserEventRequest
+                                  .getDefaultInstance()))
+                      .setResponseMarshaller(
+                          io.grpc.protobuf.ProtoUtils.marshaller(
+                              com.google.cloud.retail.v2.UserEvent.getDefaultInstance()))
+                      .setSchemaDescriptor(
+                          new UserEventServiceMethodDescriptorSupplier("WriteUserEvent"))
+                      .build();
+        }
+      }
+    }
+    return getWriteUserEventMethod;
+  }
+
+  private static volatile io.grpc.MethodDescriptor<
+          com.google.cloud.retail.v2.CollectUserEventRequest, com.google.api.HttpBody>
+      getCollectUserEventMethod;
+
+  @io.grpc.stub.annotations.RpcMethod(
+      fullMethodName = SERVICE_NAME + '/' + "CollectUserEvent",
+      requestType = com.google.cloud.retail.v2.CollectUserEventRequest.class,
+      responseType = com.google.api.HttpBody.class,
+      methodType = io.grpc.MethodDescriptor.MethodType.UNARY)
+  public static io.grpc.MethodDescriptor<
+          com.google.cloud.retail.v2.CollectUserEventRequest, com.google.api.HttpBody>
+      getCollectUserEventMethod() {
+    io.grpc.MethodDescriptor<
+            com.google.cloud.retail.v2.CollectUserEventRequest, com.google.api.HttpBody>
+        getCollectUserEventMethod;
+    if ((getCollectUserEventMethod = UserEventServiceGrpc.getCollectUserEventMethod) == null) {
+      synchronized (UserEventServiceGrpc.class) {
+        if ((getCollectUserEventMethod = UserEventServiceGrpc.getCollectUserEventMethod) == null) {
+          UserEventServiceGrpc.getCollectUserEventMethod =
+              getCollectUserEventMethod =
+                  io.grpc.MethodDescriptor
+                      .<com.google.cloud.retail.v2.CollectUserEventRequest, com.google.api.HttpBody>
+                          newBuilder()
+                      .setType(io.grpc.MethodDescriptor.MethodType.UNARY)
+                      .setFullMethodName(generateFullMethodName(SERVICE_NAME, "CollectUserEvent"))
+                      .setSampledToLocalTracing(true)
+                      .setRequestMarshaller(
+                          io.grpc.protobuf.ProtoUtils.marshaller(
+                              com.google.cloud.retail.v2.CollectUserEventRequest
+                                  .getDefaultInstance()))
+                      .setResponseMarshaller(
+                          io.grpc.protobuf.ProtoUtils.marshaller(
+                              com.google.api.HttpBody.getDefaultInstance()))
+                      .setSchemaDescriptor(
+                          new UserEventServiceMethodDescriptorSupplier("CollectUserEvent"))
+                      .build();
+        }
+      }
+    }
+    return getCollectUserEventMethod;
+  }
+
+  private static volatile io.grpc.MethodDescriptor<
+          com.google.cloud.retail.v2.PurgeUserEventsRequest, com.google.longrunning.Operation>
+      getPurgeUserEventsMethod;
+
+  @io.grpc.stub.annotations.RpcMethod(
+      fullMethodName = SERVICE_NAME + '/' + "PurgeUserEvents",
+      requestType = com.google.cloud.retail.v2.PurgeUserEventsRequest.class,
+      responseType = com.google.longrunning.Operation.class,
+      methodType = io.grpc.MethodDescriptor.MethodType.UNARY)
+  public static io.grpc.MethodDescriptor<
+          com.google.cloud.retail.v2.PurgeUserEventsRequest, com.google.longrunning.Operation>
+      getPurgeUserEventsMethod() {
+    io.grpc.MethodDescriptor<
+            com.google.cloud.retail.v2.PurgeUserEventsRequest, com.google.longrunning.Operation>
+        getPurgeUserEventsMethod;
+    if ((getPurgeUserEventsMethod = UserEventServiceGrpc.getPurgeUserEventsMethod) == null) {
+      synchronized (UserEventServiceGrpc.class) {
+        if ((getPurgeUserEventsMethod = UserEventServiceGrpc.getPurgeUserEventsMethod) == null) {
+          UserEventServiceGrpc.getPurgeUserEventsMethod =
+              getPurgeUserEventsMethod =
+                  io.grpc.MethodDescriptor
+                      .<com.google.cloud.retail.v2.PurgeUserEventsRequest,
+                          com.google.longrunning.Operation>
+                          newBuilder()
+                      .setType(io.grpc.MethodDescriptor.MethodType.UNARY)
+                      .setFullMethodName(generateFullMethodName(SERVICE_NAME, "PurgeUserEvents"))
+                      .setSampledToLocalTracing(true)
+                      .setRequestMarshaller(
+                          io.grpc.protobuf.ProtoUtils.marshaller(
+                              com.google.cloud.retail.v2.PurgeUserEventsRequest
+                                  .getDefaultInstance()))
+                      .setResponseMarshaller(
+                          io.grpc.protobuf.ProtoUtils.marshaller(
+                              com.google.longrunning.Operation.getDefaultInstance()))
+                      .setSchemaDescriptor(
+                          new UserEventServiceMethodDescriptorSupplier("PurgeUserEvents"))
+                      .build();
+        }
+      }
+    }
+    return getPurgeUserEventsMethod;
+  }
+
+  private static volatile io.grpc.MethodDescriptor<
+          com.google.cloud.retail.v2.ImportUserEventsRequest, com.google.longrunning.Operation>
+      getImportUserEventsMethod;
+
+  @io.grpc.stub.annotations.RpcMethod(
+      fullMethodName = SERVICE_NAME + '/' + "ImportUserEvents",
+      requestType = com.google.cloud.retail.v2.ImportUserEventsRequest.class,
+      responseType = com.google.longrunning.Operation.class,
+      methodType = io.grpc.MethodDescriptor.MethodType.UNARY)
+  public static io.grpc.MethodDescriptor<
+          com.google.cloud.retail.v2.ImportUserEventsRequest, com.google.longrunning.Operation>
+      getImportUserEventsMethod() {
+    io.grpc.MethodDescriptor<
+            com.google.cloud.retail.v2.ImportUserEventsRequest, com.google.longrunning.Operation>
+        getImportUserEventsMethod;
+    if ((getImportUserEventsMethod = UserEventServiceGrpc.getImportUserEventsMethod) == null) {
+      synchronized (UserEventServiceGrpc.class) {
+        if ((getImportUserEventsMethod = UserEventServiceGrpc.getImportUserEventsMethod) == null) {
+          UserEventServiceGrpc.getImportUserEventsMethod =
+              getImportUserEventsMethod =
+                  io.grpc.MethodDescriptor
+                      .<com.google.cloud.retail.v2.ImportUserEventsRequest,
+                          com.google.longrunning.Operation>
+                          newBuilder()
+                      .setType(io.grpc.MethodDescriptor.MethodType.UNARY)
+                      .setFullMethodName(generateFullMethodName(SERVICE_NAME, "ImportUserEvents"))
+                      .setSampledToLocalTracing(true)
+                      .setRequestMarshaller(
+                          io.grpc.protobuf.ProtoUtils.marshaller(
+                              com.google.cloud.retail.v2.ImportUserEventsRequest
+                                  .getDefaultInstance()))
+                      .setResponseMarshaller(
+                          io.grpc.protobuf.ProtoUtils.marshaller(
+                              com.google.longrunning.Operation.getDefaultInstance()))
+                      .setSchemaDescriptor(
+                          new UserEventServiceMethodDescriptorSupplier("ImportUserEvents"))
+                      .build();
+        }
+      }
+    }
+    return getImportUserEventsMethod;
+  }
+
+  private static volatile io.grpc.MethodDescriptor<
+          com.google.cloud.retail.v2.RejoinUserEventsRequest, com.google.longrunning.Operation>
+      getRejoinUserEventsMethod;
+
+  @io.grpc.stub.annotations.RpcMethod(
+      fullMethodName = SERVICE_NAME + '/' + "RejoinUserEvents",
+      requestType = com.google.cloud.retail.v2.RejoinUserEventsRequest.class,
+      responseType = com.google.longrunning.Operation.class,
+      methodType = io.grpc.MethodDescriptor.MethodType.UNARY)
+  public static io.grpc.MethodDescriptor<
+          com.google.cloud.retail.v2.RejoinUserEventsRequest, com.google.longrunning.Operation>
+      getRejoinUserEventsMethod() {
+    io.grpc.MethodDescriptor<
+            com.google.cloud.retail.v2.RejoinUserEventsRequest, com.google.longrunning.Operation>
+        getRejoinUserEventsMethod;
+    if ((getRejoinUserEventsMethod = UserEventServiceGrpc.getRejoinUserEventsMethod) == null) {
+      synchronized (UserEventServiceGrpc.class) {
+        if ((getRejoinUserEventsMethod = UserEventServiceGrpc.getRejoinUserEventsMethod) == null) {
+          UserEventServiceGrpc.getRejoinUserEventsMethod =
+              getRejoinUserEventsMethod =
+                  io.grpc.MethodDescriptor
+                      .<com.google.cloud.retail.v2.RejoinUserEventsRequest,
+                          com.google.longrunning.Operation>
+                          newBuilder()
+                      .setType(io.grpc.MethodDescriptor.MethodType.UNARY)
+                      .setFullMethodName(generateFullMethodName(SERVICE_NAME, "RejoinUserEvents"))
+                      .setSampledToLocalTracing(true)
+                      .setRequestMarshaller(
+                          io.grpc.protobuf.ProtoUtils.marshaller(
+                              com.google.cloud.retail.v2.RejoinUserEventsRequest
+                                  .getDefaultInstance()))
+                      .setResponseMarshaller(
+                          io.grpc.protobuf.ProtoUtils.marshaller(
+                              com.google.longrunning.Operation.getDefaultInstance()))
+                      .setSchemaDescriptor(
+                          new UserEventServiceMethodDescriptorSupplier("RejoinUserEvents"))
+                      .build();
+        }
+      }
+    }
+    return getRejoinUserEventsMethod;
+  }
+
+  /** Creates a new async stub that supports all call types for the service */
+  public static UserEventServiceStub newStub(io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<UserEventServiceStub> factory =
+        new io.grpc.stub.AbstractStub.StubFactory<UserEventServiceStub>() {
+          @java.lang.Override
+          public UserEventServiceStub newStub(
+              io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+            return new UserEventServiceStub(channel, callOptions);
+          }
+        };
+    return UserEventServiceStub.newStub(factory, channel);
+  }
+
+  /**
+   * Creates a new blocking-style stub that supports unary and streaming output calls on the service
+   */
+  public static UserEventServiceBlockingStub newBlockingStub(io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<UserEventServiceBlockingStub> factory =
+        new io.grpc.stub.AbstractStub.StubFactory<UserEventServiceBlockingStub>() {
+          @java.lang.Override
+          public UserEventServiceBlockingStub newStub(
+              io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+            return new UserEventServiceBlockingStub(channel, callOptions);
+          }
+        };
+    return UserEventServiceBlockingStub.newStub(factory, channel);
+  }
+
+  /** Creates a new ListenableFuture-style stub that supports unary calls on the service */
+  public static UserEventServiceFutureStub newFutureStub(io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<UserEventServiceFutureStub> factory =
+        new io.grpc.stub.AbstractStub.StubFactory<UserEventServiceFutureStub>() {
+          @java.lang.Override
+          public UserEventServiceFutureStub newStub(
+              io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+            return new UserEventServiceFutureStub(channel, callOptions);
+          }
+        };
+    return UserEventServiceFutureStub.newStub(factory, channel);
+  }
+
+  /**
+   *
+   *
+   * <pre>
+   * Service for ingesting end user actions on the customer website.
+   * </pre>
+   */
+  public abstract static class UserEventServiceImplBase implements io.grpc.BindableService {
+
+    /**
+     *
+     *
+     * <pre>
+     * Writes a single user event.
+     * </pre>
+     */
+    public void writeUserEvent(
+        com.google.cloud.retail.v2.WriteUserEventRequest request,
+        io.grpc.stub.StreamObserver<com.google.cloud.retail.v2.UserEvent> responseObserver) {
+      asyncUnimplementedUnaryCall(getWriteUserEventMethod(), responseObserver);
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * Writes a single user event from the browser. This uses a GET request to
+     * due to browser restriction of POST-ing to a 3rd party domain.
+     * This method is used only by the Retail API JavaScript pixel and Google Tag
+     * Manager. Users should not call this method directly.
+     * </pre>
+     */
+    public void collectUserEvent(
+        com.google.cloud.retail.v2.CollectUserEventRequest request,
+        io.grpc.stub.StreamObserver<com.google.api.HttpBody> responseObserver) {
+      asyncUnimplementedUnaryCall(getCollectUserEventMethod(), responseObserver);
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * Deletes permanently all user events specified by the filter provided.
+     * Depending on the number of events specified by the filter, this operation
+     * could take hours or days to complete. To test a filter, use the list
+     * command first.
+     * </pre>
+     */
+    public void purgeUserEvents(
+        com.google.cloud.retail.v2.PurgeUserEventsRequest request,
+        io.grpc.stub.StreamObserver<com.google.longrunning.Operation> responseObserver) {
+      asyncUnimplementedUnaryCall(getPurgeUserEventsMethod(), responseObserver);
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * Bulk import of User events. Request processing might be
+     * synchronous. Events that already exist are skipped.
+     * Use this method for backfilling historical user events.
+     * Operation.response is of type ImportResponse. Note that it is
+     * possible for a subset of the items to be successfully inserted.
+     * Operation.metadata is of type ImportMetadata.
+     * </pre>
+     */
+    public void importUserEvents(
+        com.google.cloud.retail.v2.ImportUserEventsRequest request,
+        io.grpc.stub.StreamObserver<com.google.longrunning.Operation> responseObserver) {
+      asyncUnimplementedUnaryCall(getImportUserEventsMethod(), responseObserver);
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * Triggers a user event rejoin operation with latest product catalog. Events
+     * will not be annotated with detailed product information if product is
+     * missing from the catalog at the time the user event is ingested, and these
+     * events are stored as unjoined events with a limited usage on training and
+     * serving. This API can be used to trigger a 'join' operation on specified
+     * events with latest version of product catalog. It can also be used to
+     * correct events joined with wrong product catalog.
+     * </pre>
+     */
+    public void rejoinUserEvents(
+        com.google.cloud.retail.v2.RejoinUserEventsRequest request,
+        io.grpc.stub.StreamObserver<com.google.longrunning.Operation> responseObserver) {
+      asyncUnimplementedUnaryCall(getRejoinUserEventsMethod(), responseObserver);
+    }
+
+    @java.lang.Override
+    public final io.grpc.ServerServiceDefinition bindService() {
+      return io.grpc.ServerServiceDefinition.builder(getServiceDescriptor())
+          .addMethod(
+              getWriteUserEventMethod(),
+              asyncUnaryCall(
+                  new MethodHandlers<
+                      com.google.cloud.retail.v2.WriteUserEventRequest,
+                      com.google.cloud.retail.v2.UserEvent>(this, METHODID_WRITE_USER_EVENT)))
+          .addMethod(
+              getCollectUserEventMethod(),
+              asyncUnaryCall(
+                  new MethodHandlers<
+                      com.google.cloud.retail.v2.CollectUserEventRequest, com.google.api.HttpBody>(
+                      this, METHODID_COLLECT_USER_EVENT)))
+          .addMethod(
+              getPurgeUserEventsMethod(),
+              asyncUnaryCall(
+                  new MethodHandlers<
+                      com.google.cloud.retail.v2.PurgeUserEventsRequest,
+                      com.google.longrunning.Operation>(this, METHODID_PURGE_USER_EVENTS)))
+          .addMethod(
+              getImportUserEventsMethod(),
+              asyncUnaryCall(
+                  new MethodHandlers<
+                      com.google.cloud.retail.v2.ImportUserEventsRequest,
+                      com.google.longrunning.Operation>(this, METHODID_IMPORT_USER_EVENTS)))
+          .addMethod(
+              getRejoinUserEventsMethod(),
+              asyncUnaryCall(
+                  new MethodHandlers<
+                      com.google.cloud.retail.v2.RejoinUserEventsRequest,
+                      com.google.longrunning.Operation>(this, METHODID_REJOIN_USER_EVENTS)))
+          .build();
+    }
+  }
+
+  /**
+   *
+   *
+   * <pre>
+   * Service for ingesting end user actions on the customer website.
+   * </pre>
+   */
+  public static final class UserEventServiceStub
+      extends io.grpc.stub.AbstractAsyncStub<UserEventServiceStub> {
+    private UserEventServiceStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected UserEventServiceStub build(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new UserEventServiceStub(channel, callOptions);
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * Writes a single user event.
+     * </pre>
+     */
+    public void writeUserEvent(
+        com.google.cloud.retail.v2.WriteUserEventRequest request,
+        io.grpc.stub.StreamObserver<com.google.cloud.retail.v2.UserEvent> responseObserver) {
+      asyncUnaryCall(
+          getChannel().newCall(getWriteUserEventMethod(), getCallOptions()),
+          request,
+          responseObserver);
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * Writes a single user event from the browser. This uses a GET request to
+     * due to browser restriction of POST-ing to a 3rd party domain.
+     * This method is used only by the Retail API JavaScript pixel and Google Tag
+     * Manager. Users should not call this method directly.
+     * </pre>
+     */
+    public void collectUserEvent(
+        com.google.cloud.retail.v2.CollectUserEventRequest request,
+        io.grpc.stub.StreamObserver<com.google.api.HttpBody> responseObserver) {
+      asyncUnaryCall(
+          getChannel().newCall(getCollectUserEventMethod(), getCallOptions()),
+          request,
+          responseObserver);
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * Deletes permanently all user events specified by the filter provided.
+     * Depending on the number of events specified by the filter, this operation
+     * could take hours or days to complete. To test a filter, use the list
+     * command first.
+     * </pre>
+     */
+    public void purgeUserEvents(
+        com.google.cloud.retail.v2.PurgeUserEventsRequest request,
+        io.grpc.stub.StreamObserver<com.google.longrunning.Operation> responseObserver) {
+      asyncUnaryCall(
+          getChannel().newCall(getPurgeUserEventsMethod(), getCallOptions()),
+          request,
+          responseObserver);
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * Bulk import of User events. Request processing might be
+     * synchronous. Events that already exist are skipped.
+     * Use this method for backfilling historical user events.
+     * Operation.response is of type ImportResponse. Note that it is
+     * possible for a subset of the items to be successfully inserted.
+     * Operation.metadata is of type ImportMetadata.
+     * </pre>
+     */
+    public void importUserEvents(
+        com.google.cloud.retail.v2.ImportUserEventsRequest request,
+        io.grpc.stub.StreamObserver<com.google.longrunning.Operation> responseObserver) {
+      asyncUnaryCall(
+          getChannel().newCall(getImportUserEventsMethod(), getCallOptions()),
+          request,
+          responseObserver);
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * Triggers a user event rejoin operation with latest product catalog. Events
+     * will not be annotated with detailed product information if product is
+     * missing from the catalog at the time the user event is ingested, and these
+     * events are stored as unjoined events with a limited usage on training and
+     * serving. This API can be used to trigger a 'join' operation on specified
+     * events with latest version of product catalog. It can also be used to
+     * correct events joined with wrong product catalog.
+     * </pre>
+     */
+    public void rejoinUserEvents(
+        com.google.cloud.retail.v2.RejoinUserEventsRequest request,
+        io.grpc.stub.StreamObserver<com.google.longrunning.Operation> responseObserver) {
+      asyncUnaryCall(
+          getChannel().newCall(getRejoinUserEventsMethod(), getCallOptions()),
+          request,
+          responseObserver);
+    }
+  }
+
+  /**
+   *
+   *
+   * <pre>
+   * Service for ingesting end user actions on the customer website.
+   * </pre>
+   */
+  public static final class UserEventServiceBlockingStub
+      extends io.grpc.stub.AbstractBlockingStub<UserEventServiceBlockingStub> {
+    private UserEventServiceBlockingStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected UserEventServiceBlockingStub build(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new UserEventServiceBlockingStub(channel, callOptions);
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * Writes a single user event.
+     * </pre>
+     */
+    public com.google.cloud.retail.v2.UserEvent writeUserEvent(
+        com.google.cloud.retail.v2.WriteUserEventRequest request) {
+      return blockingUnaryCall(getChannel(), getWriteUserEventMethod(), getCallOptions(), request);
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * Writes a single user event from the browser. This uses a GET request to
+     * due to browser restriction of POST-ing to a 3rd party domain.
+     * This method is used only by the Retail API JavaScript pixel and Google Tag
+     * Manager. Users should not call this method directly.
+     * </pre>
+     */
+    public com.google.api.HttpBody collectUserEvent(
+        com.google.cloud.retail.v2.CollectUserEventRequest request) {
+      return blockingUnaryCall(
+          getChannel(), getCollectUserEventMethod(), getCallOptions(), request);
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * Deletes permanently all user events specified by the filter provided.
+     * Depending on the number of events specified by the filter, this operation
+     * could take hours or days to complete. To test a filter, use the list
+     * command first.
+     * </pre>
+     */
+    public com.google.longrunning.Operation purgeUserEvents(
+        com.google.cloud.retail.v2.PurgeUserEventsRequest request) {
+      return blockingUnaryCall(getChannel(), getPurgeUserEventsMethod(), getCallOptions(), request);
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * Bulk import of User events. Request processing might be
+     * synchronous. Events that already exist are skipped.
+     * Use this method for backfilling historical user events.
+     * Operation.response is of type ImportResponse. Note that it is
+     * possible for a subset of the items to be successfully inserted.
+     * Operation.metadata is of type ImportMetadata.
+     * </pre>
+     */
+    public com.google.longrunning.Operation importUserEvents(
+        com.google.cloud.retail.v2.ImportUserEventsRequest request) {
+      return blockingUnaryCall(
+          getChannel(), getImportUserEventsMethod(), getCallOptions(), request);
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * Triggers a user event rejoin operation with latest product catalog. Events
+     * will not be annotated with detailed product information if product is
+     * missing from the catalog at the time the user event is ingested, and these
+     * events are stored as unjoined events with a limited usage on training and
+     * serving. This API can be used to trigger a 'join' operation on specified
+     * events with latest version of product catalog. It can also be used to
+     * correct events joined with wrong product catalog.
+     * </pre>
+     */
+    public com.google.longrunning.Operation rejoinUserEvents(
+        com.google.cloud.retail.v2.RejoinUserEventsRequest request) {
+      return blockingUnaryCall(
+          getChannel(), getRejoinUserEventsMethod(), getCallOptions(), request);
+    }
+  }
+
+  /**
+   *
+   *
+   * <pre>
+   * Service for ingesting end user actions on the customer website.
+   * </pre>
+   */
+  public static final class UserEventServiceFutureStub
+      extends io.grpc.stub.AbstractFutureStub<UserEventServiceFutureStub> {
+    private UserEventServiceFutureStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected UserEventServiceFutureStub build(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new UserEventServiceFutureStub(channel, callOptions);
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * Writes a single user event.
+     * </pre>
+     */
+    public com.google.common.util.concurrent.ListenableFuture<com.google.cloud.retail.v2.UserEvent>
+        writeUserEvent(com.google.cloud.retail.v2.WriteUserEventRequest request) {
+      return futureUnaryCall(
+          getChannel().newCall(getWriteUserEventMethod(), getCallOptions()), request);
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * Writes a single user event from the browser. This uses a GET request to
+     * due to browser restriction of POST-ing to a 3rd party domain.
+     * This method is used only by the Retail API JavaScript pixel and Google Tag
+     * Manager. Users should not call this method directly.
+     * </pre>
+     */
+    public com.google.common.util.concurrent.ListenableFuture<com.google.api.HttpBody>
+        collectUserEvent(com.google.cloud.retail.v2.CollectUserEventRequest request) {
+      return futureUnaryCall(
+          getChannel().newCall(getCollectUserEventMethod(), getCallOptions()), request);
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * Deletes permanently all user events specified by the filter provided.
+     * Depending on the number of events specified by the filter, this operation
+     * could take hours or days to complete. To test a filter, use the list
+     * command first.
+     * </pre>
+     */
+    public com.google.common.util.concurrent.ListenableFuture<com.google.longrunning.Operation>
+        purgeUserEvents(com.google.cloud.retail.v2.PurgeUserEventsRequest request) {
+      return futureUnaryCall(
+          getChannel().newCall(getPurgeUserEventsMethod(), getCallOptions()), request);
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * Bulk import of User events. Request processing might be
+     * synchronous. Events that already exist are skipped.
+     * Use this method for backfilling historical user events.
+     * Operation.response is of type ImportResponse. Note that it is
+     * possible for a subset of the items to be successfully inserted.
+     * Operation.metadata is of type ImportMetadata.
+     * </pre>
+     */
+    public com.google.common.util.concurrent.ListenableFuture<com.google.longrunning.Operation>
+        importUserEvents(com.google.cloud.retail.v2.ImportUserEventsRequest request) {
+      return futureUnaryCall(
+          getChannel().newCall(getImportUserEventsMethod(), getCallOptions()), request);
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * Triggers a user event rejoin operation with latest product catalog. Events
+     * will not be annotated with detailed product information if product is
+     * missing from the catalog at the time the user event is ingested, and these
+     * events are stored as unjoined events with a limited usage on training and
+     * serving. This API can be used to trigger a 'join' operation on specified
+     * events with latest version of product catalog. It can also be used to
+     * correct events joined with wrong product catalog.
+     * </pre>
+     */
+    public com.google.common.util.concurrent.ListenableFuture<com.google.longrunning.Operation>
+        rejoinUserEvents(com.google.cloud.retail.v2.RejoinUserEventsRequest request) {
+      return futureUnaryCall(
+          getChannel().newCall(getRejoinUserEventsMethod(), getCallOptions()), request);
+    }
+  }
+
+  private static final int METHODID_WRITE_USER_EVENT = 0;
+  private static final int METHODID_COLLECT_USER_EVENT = 1;
+  private static final int METHODID_PURGE_USER_EVENTS = 2;
+  private static final int METHODID_IMPORT_USER_EVENTS = 3;
+  private static final int METHODID_REJOIN_USER_EVENTS = 4;
+
+  private static final class MethodHandlers<Req, Resp>
+      implements io.grpc.stub.ServerCalls.UnaryMethod<Req, Resp>,
+          io.grpc.stub.ServerCalls.ServerStreamingMethod<Req, Resp>,
+          io.grpc.stub.ServerCalls.ClientStreamingMethod<Req, Resp>,
+          io.grpc.stub.ServerCalls.BidiStreamingMethod<Req, Resp> {
+    private final UserEventServiceImplBase serviceImpl;
+    private final int methodId;
+
+    MethodHandlers(UserEventServiceImplBase serviceImpl, int methodId) {
+      this.serviceImpl = serviceImpl;
+      this.methodId = methodId;
+    }
+
+    @java.lang.Override
+    @java.lang.SuppressWarnings("unchecked")
+    public void invoke(Req request, io.grpc.stub.StreamObserver<Resp> responseObserver) {
+      switch (methodId) {
+        case METHODID_WRITE_USER_EVENT:
+          serviceImpl.writeUserEvent(
+              (com.google.cloud.retail.v2.WriteUserEventRequest) request,
+              (io.grpc.stub.StreamObserver<com.google.cloud.retail.v2.UserEvent>) responseObserver);
+          break;
+        case METHODID_COLLECT_USER_EVENT:
+          serviceImpl.collectUserEvent(
+              (com.google.cloud.retail.v2.CollectUserEventRequest) request,
+              (io.grpc.stub.StreamObserver<com.google.api.HttpBody>) responseObserver);
+          break;
+        case METHODID_PURGE_USER_EVENTS:
+          serviceImpl.purgeUserEvents(
+              (com.google.cloud.retail.v2.PurgeUserEventsRequest) request,
+              (io.grpc.stub.StreamObserver<com.google.longrunning.Operation>) responseObserver);
+          break;
+        case METHODID_IMPORT_USER_EVENTS:
+          serviceImpl.importUserEvents(
+              (com.google.cloud.retail.v2.ImportUserEventsRequest) request,
+              (io.grpc.stub.StreamObserver<com.google.longrunning.Operation>) responseObserver);
+          break;
+        case METHODID_REJOIN_USER_EVENTS:
+          serviceImpl.rejoinUserEvents(
+              (com.google.cloud.retail.v2.RejoinUserEventsRequest) request,
+              (io.grpc.stub.StreamObserver<com.google.longrunning.Operation>) responseObserver);
+          break;
+        default:
+          throw new AssertionError();
+      }
+    }
+
+    @java.lang.Override
+    @java.lang.SuppressWarnings("unchecked")
+    public io.grpc.stub.StreamObserver<Req> invoke(
+        io.grpc.stub.StreamObserver<Resp> responseObserver) {
+      switch (methodId) {
+        default:
+          throw new AssertionError();
+      }
+    }
+  }
+
+  private abstract static class UserEventServiceBaseDescriptorSupplier
+      implements io.grpc.protobuf.ProtoFileDescriptorSupplier,
+          io.grpc.protobuf.ProtoServiceDescriptorSupplier {
+    UserEventServiceBaseDescriptorSupplier() {}
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.FileDescriptor getFileDescriptor() {
+      return com.google.cloud.retail.v2.UserEventServiceProto.getDescriptor();
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.ServiceDescriptor getServiceDescriptor() {
+      return getFileDescriptor().findServiceByName("UserEventService");
+    }
+  }
+
+  private static final class UserEventServiceFileDescriptorSupplier
+      extends UserEventServiceBaseDescriptorSupplier {
+    UserEventServiceFileDescriptorSupplier() {}
+  }
+
+  private static final class UserEventServiceMethodDescriptorSupplier
+      extends UserEventServiceBaseDescriptorSupplier
+      implements io.grpc.protobuf.ProtoMethodDescriptorSupplier {
+    private final String methodName;
+
+    UserEventServiceMethodDescriptorSupplier(String methodName) {
+      this.methodName = methodName;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.MethodDescriptor getMethodDescriptor() {
+      return getServiceDescriptor().findMethodByName(methodName);
+    }
+  }
+
+  private static volatile io.grpc.ServiceDescriptor serviceDescriptor;
+
+  public static io.grpc.ServiceDescriptor getServiceDescriptor() {
+    io.grpc.ServiceDescriptor result = serviceDescriptor;
+    if (result == null) {
+      synchronized (UserEventServiceGrpc.class) {
+        result = serviceDescriptor;
+        if (result == null) {
+          serviceDescriptor =
+              result =
+                  io.grpc.ServiceDescriptor.newBuilder(SERVICE_NAME)
+                      .setSchemaDescriptor(new UserEventServiceFileDescriptorSupplier())
+                      .addMethod(getWriteUserEventMethod())
+                      .addMethod(getCollectUserEventMethod())
+                      .addMethod(getPurgeUserEventsMethod())
+                      .addMethod(getImportUserEventsMethod())
+                      .addMethod(getRejoinUserEventsMethod())
+                      .build();
+        }
+      }
+    }
+    return result;
+  }
+}
diff --git a/java.header b/java.header
new file mode 100644
index 00000000..3a9b503a
--- /dev/null
+++ b/java.header
@@ -0,0 +1,15 @@
+^/\*$
+^ \* Copyright \d\d\d\d,? Google (Inc\.|LLC)( All [rR]ights [rR]eserved\.)?$
+^ \*$
+^ \* Licensed under the Apache License, Version 2\.0 \(the "License"\);$
+^ \* you may not use this file except in compliance with the License\.$
+^ \* You may obtain a copy of the License at$
+^ \*$
+^ \*[ ]+https?://www.apache.org/licenses/LICENSE-2\.0$
+^ \*$
+^ \* Unless required by applicable law or agreed to in writing, software$
+^ \* distributed under the License is distributed on an "AS IS" BASIS,$
+^ \* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied\.$
+^ \* See the License for the specific language governing permissions and$
+^ \* limitations under the License\.$
+^ \*/$
diff --git a/license-checks.xml b/license-checks.xml
new file mode 100644
index 00000000..6597fced
--- /dev/null
+++ b/license-checks.xml
@@ -0,0 +1,10 @@
+<?xml version="1.0"?>
+<!DOCTYPE module PUBLIC
+    "-//Puppy Crawl//DTD Check Configuration 1.3//EN"
+    "http://www.puppycrawl.com/dtds/configuration_1_3.dtd">
+<module name="Checker">
+  <module name="RegexpHeader">
+    <property name="fileExtensions" value="java"/>
+    <property name="headerFile" value="${checkstyle.header.file}"/>
+  </module>
+</module>
diff --git a/pom.xml b/pom.xml
new file mode 100644
index 00000000..056cfe4d
--- /dev/null
+++ b/pom.xml
@@ -0,0 +1,189 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <groupId>com.google.cloud</groupId>
+  <artifactId>google-cloud-retail-parent</artifactId>
+  <packaging>pom</packaging>
+  <version>0.0.1-SNAPSHOT</version><!-- {x-version-update:google-cloud-retail:current} -->
+  <name>Google Cloud Retail Parent</name>
+  <url>https://github.com/googleapis/java-</url>
+  <description>
+    Java idiomatic client for Google Cloud Platform services.
+  </description>
+
+  <parent>
+    <groupId>com.google.cloud</groupId>
+    <artifactId>google-cloud-shared-config</artifactId>
+    <version>0.9.2</version>
+  </parent>
+
+  <developers>
+    <developer>
+      <id>chingor</id>
+      <name>Jeff Ching</name>
+      <email>chingor@google.com</email>
+      <organization>Google</organization>
+      <roles>
+        <role>Developer</role>
+      </roles>
+    </developer>
+  </developers>
+  <organization>
+    <name>Google LLC</name>
+  </organization>
+  <scm>
+    <connection>scm:git:git@github.com:googleapis/java-.git</connection>
+    <developerConnection>scm:git:git@github.com:googleapis/java-.git</developerConnection>
+    <url>https://github.com/googleapis/java-</url>
+    <tag>HEAD</tag>
+  </scm>
+  <issueManagement>
+    <url>https://github.com/googleapis/java-/issues</url>
+    <system>GitHub Issues</system>
+  </issueManagement>
+  <distributionManagement>
+    <snapshotRepository>
+      <id>sonatype-nexus-snapshots</id>
+      <url>https://oss.sonatype.org/content/repositories/snapshots</url>
+    </snapshotRepository>
+    <repository>
+      <id>sonatype-nexus-staging</id>
+      <url>https://oss.sonatype.org/service/local/staging/deploy/maven2/</url>
+    </repository>
+  </distributionManagement>
+  <licenses>
+    <license>
+      <name>Apache-2.0</name>
+      <url>https://www.apache.org/licenses/LICENSE-2.0.txt</url>
+    </license>
+  </licenses>
+
+  <properties>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
+    <github.global.server>github</github.global.server>
+    <site.installationModule>google-cloud-retail-parent</site.installationModule>
+  </properties>
+
+  <dependencyManagement>
+    <dependencies>
+      <dependency>
+        <groupId>com.google.cloud</groupId>
+        <artifactId>google-cloud-retail</artifactId>
+        <version>0.0.1-SNAPSHOT</version><!-- {x-version-update:google-cloud-retail:current} -->
+      </dependency>
+      <dependency>
+        <groupId>com.google.api.grpc</groupId>
+        <artifactId>proto-google-cloud-retail-v2</artifactId>
+        <version>0.0.1-SNAPSHOT</version><!-- {x-version-update:proto-google-cloud-retail-v2:current} -->
+      </dependency>
+      <dependency>
+        <groupId>com.google.api.grpc</groupId>
+        <artifactId>grpc-google-cloud-retail-v2</artifactId>
+        <version>0.0.1-SNAPSHOT</version><!-- {x-version-update:grpc-google-cloud-retail-v2:current} -->
+      </dependency>
+
+      <dependency>
+        <groupId>com.google.cloud</groupId>
+        <artifactId>google-cloud-shared-dependencies</artifactId>
+        <version>0.9.0</version>
+        <type>pom</type>
+        <scope>import</scope>
+      </dependency>
+    </dependencies>
+  </dependencyManagement>
+
+  <build>
+    <pluginManagement>
+      <plugins>
+        <plugin>
+          <groupId>org.apache.maven.plugins</groupId>
+          <artifactId>maven-dependency-plugin</artifactId>
+          <configuration>
+            <ignoredUnusedDeclaredDependencies>
+              <ignoredUnusedDeclaredDependency>org.objenesis:objenesis</ignoredUnusedDeclaredDependency>
+              <ignoredUnusedDeclaredDependency>javax.annotation:javax.annotation-api</ignoredUnusedDeclaredDependency>
+            </ignoredUnusedDeclaredDependencies>
+          </configuration>
+        </plugin>
+      </plugins>
+    </pluginManagement>
+  </build>
+
+  <modules>
+    <module>google-cloud-retail</module>
+    <module>proto-google-cloud-retail-v2</module>
+    <module>grpc-google-cloud-retail-v2</module>
+    <module>google-cloud-retail-bom</module>
+  </modules>
+
+  <reporting>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-project-info-reports-plugin</artifactId>
+        <version>3.1.1</version>
+        <reportSets>
+          <reportSet>
+            <reports>
+              <report>index</report>
+              <report>dependency-info</report>
+              <report>team</report>
+              <report>ci-management</report>
+              <report>issue-management</report>
+              <report>licenses</report>
+              <report>scm</report>
+              <report>dependency-management</report>
+              <report>distribution-management</report>
+              <report>summary</report>
+              <report>modules</report>
+            </reports>
+          </reportSet>
+        </reportSets>
+        <configuration>
+          <dependencyDetailsEnabled>true</dependencyDetailsEnabled>
+          <artifactId>${site.installationModule}</artifactId>
+          <packaging>jar</packaging>
+        </configuration>
+      </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-javadoc-plugin</artifactId>
+        <version>3.2.0</version>
+        <reportSets>
+          <reportSet>
+            <id>html</id>
+            <reports>
+              <report>aggregate</report>
+              <report>javadoc</report>
+            </reports>
+          </reportSet>
+        </reportSets>
+        <configuration>
+          <doclint>none</doclint>
+          <show>protected</show>
+          <nohelp>true</nohelp>
+          <outputDirectory>${project.build.directory}/javadoc</outputDirectory>
+          <groups>
+            <group>
+              <title>Test helpers packages</title>
+              <packages>com.google.cloud.testing</packages>
+            </group>
+            <group>
+              <title>SPI packages</title>
+              <packages>com.google.cloud.spi*</packages>
+            </group>
+          </groups>
+
+          <links>
+            <link>https://grpc.io/grpc-java/javadoc/</link>
+            <link>https://developers.google.com/protocol-buffers/docs/reference/java/</link>
+            <link>https://googleapis.dev/java/google-auth-library/latest/</link>
+            <link>https://googleapis.dev/java/gax/latest/</link>
+            <link>https://googleapis.github.io/api-common-java/${google.api-common.version}/apidocs/</link>
+          </links>
+        </configuration>
+      </plugin>
+    </plugins>
+  </reporting>
+</project>
\ No newline at end of file
diff --git a/proto-google-cloud-retail-v2/pom.xml b/proto-google-cloud-retail-v2/pom.xml
new file mode 100644
index 00000000..cae81360
--- /dev/null
+++ b/proto-google-cloud-retail-v2/pom.xml
@@ -0,0 +1,42 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <groupId>com.google.api.grpc</groupId>
+  <artifactId>proto-google-cloud-retail-v2</artifactId>
+  <version>0.0.1-SNAPSHOT</version><!-- {x-version-update:proto-google-cloud-retail-v2:current} -->
+  <name>proto-google-cloud-retail-v2</name>
+  <description>Proto library for google-cloud-retail</description>
+  <parent>
+    <groupId>com.google.cloud</groupId>
+    <artifactId>google-cloud-retail-parent</artifactId>
+    <version>0.0.1-SNAPSHOT</version><!-- {x-version-update:google-cloud-retail:current} -->
+  </parent>
+  <dependencies>
+    <dependency>
+      <groupId>com.google.protobuf</groupId>
+      <artifactId>protobuf-java</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>com.google.api.grpc</groupId>
+      <artifactId>proto-google-common-protos</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>com.google.api</groupId>
+      <artifactId>api-common</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>com.google.guava</groupId>
+      <artifactId>guava</artifactId>
+    </dependency>
+  </dependencies>
+
+  <build>
+    <plugins>
+      <plugin>
+          <groupId>org.codehaus.mojo</groupId>
+          <artifactId>flatten-maven-plugin</artifactId>
+        </plugin>
+    </plugins>
+  </build>
+</project>
\ No newline at end of file
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/BigQuerySource.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/BigQuerySource.java
new file mode 100644
index 00000000..1fb0d42c
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/BigQuerySource.java
@@ -0,0 +1,1469 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/import_config.proto
+
+package com.google.cloud.retail.v2;
+
+/**
+ *
+ *
+ * <pre>
+ * BigQuery source import data from.
+ * </pre>
+ *
+ * Protobuf type {@code google.cloud.retail.v2.BigQuerySource}
+ */
+public final class BigQuerySource extends com.google.protobuf.GeneratedMessageV3
+    implements
+    // @@protoc_insertion_point(message_implements:google.cloud.retail.v2.BigQuerySource)
+    BigQuerySourceOrBuilder {
+  private static final long serialVersionUID = 0L;
+  // Use BigQuerySource.newBuilder() to construct.
+  private BigQuerySource(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+    super(builder);
+  }
+
+  private BigQuerySource() {
+    projectId_ = "";
+    datasetId_ = "";
+    tableId_ = "";
+    gcsStagingDir_ = "";
+    dataSchema_ = "";
+  }
+
+  @java.lang.Override
+  @SuppressWarnings({"unused"})
+  protected java.lang.Object newInstance(UnusedPrivateParameter unused) {
+    return new BigQuerySource();
+  }
+
+  @java.lang.Override
+  public final com.google.protobuf.UnknownFieldSet getUnknownFields() {
+    return this.unknownFields;
+  }
+
+  private BigQuerySource(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    this();
+    if (extensionRegistry == null) {
+      throw new java.lang.NullPointerException();
+    }
+    com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+        com.google.protobuf.UnknownFieldSet.newBuilder();
+    try {
+      boolean done = false;
+      while (!done) {
+        int tag = input.readTag();
+        switch (tag) {
+          case 0:
+            done = true;
+            break;
+          case 10:
+            {
+              java.lang.String s = input.readStringRequireUtf8();
+
+              datasetId_ = s;
+              break;
+            }
+          case 18:
+            {
+              java.lang.String s = input.readStringRequireUtf8();
+
+              tableId_ = s;
+              break;
+            }
+          case 26:
+            {
+              java.lang.String s = input.readStringRequireUtf8();
+
+              gcsStagingDir_ = s;
+              break;
+            }
+          case 34:
+            {
+              java.lang.String s = input.readStringRequireUtf8();
+
+              dataSchema_ = s;
+              break;
+            }
+          case 42:
+            {
+              java.lang.String s = input.readStringRequireUtf8();
+
+              projectId_ = s;
+              break;
+            }
+          default:
+            {
+              if (!parseUnknownField(input, unknownFields, extensionRegistry, tag)) {
+                done = true;
+              }
+              break;
+            }
+        }
+      }
+    } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+      throw e.setUnfinishedMessage(this);
+    } catch (java.io.IOException e) {
+      throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
+    } finally {
+      this.unknownFields = unknownFields.build();
+      makeExtensionsImmutable();
+    }
+  }
+
+  public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+    return com.google.cloud.retail.v2.ImportConfigProto
+        .internal_static_google_cloud_retail_v2_BigQuerySource_descriptor;
+  }
+
+  @java.lang.Override
+  protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internalGetFieldAccessorTable() {
+    return com.google.cloud.retail.v2.ImportConfigProto
+        .internal_static_google_cloud_retail_v2_BigQuerySource_fieldAccessorTable
+        .ensureFieldAccessorsInitialized(
+            com.google.cloud.retail.v2.BigQuerySource.class,
+            com.google.cloud.retail.v2.BigQuerySource.Builder.class);
+  }
+
+  public static final int PROJECT_ID_FIELD_NUMBER = 5;
+  private volatile java.lang.Object projectId_;
+  /**
+   *
+   *
+   * <pre>
+   * The project id (can be project # or id) that the BigQuery source is in with
+   * a length limit of 128 characters. If not specified, inherits the project
+   * id from the parent request.
+   * </pre>
+   *
+   * <code>string project_id = 5;</code>
+   *
+   * @return The projectId.
+   */
+  @java.lang.Override
+  public java.lang.String getProjectId() {
+    java.lang.Object ref = projectId_;
+    if (ref instanceof java.lang.String) {
+      return (java.lang.String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+      java.lang.String s = bs.toStringUtf8();
+      projectId_ = s;
+      return s;
+    }
+  }
+  /**
+   *
+   *
+   * <pre>
+   * The project id (can be project # or id) that the BigQuery source is in with
+   * a length limit of 128 characters. If not specified, inherits the project
+   * id from the parent request.
+   * </pre>
+   *
+   * <code>string project_id = 5;</code>
+   *
+   * @return The bytes for projectId.
+   */
+  @java.lang.Override
+  public com.google.protobuf.ByteString getProjectIdBytes() {
+    java.lang.Object ref = projectId_;
+    if (ref instanceof java.lang.String) {
+      com.google.protobuf.ByteString b =
+          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+      projectId_ = b;
+      return b;
+    } else {
+      return (com.google.protobuf.ByteString) ref;
+    }
+  }
+
+  public static final int DATASET_ID_FIELD_NUMBER = 1;
+  private volatile java.lang.Object datasetId_;
+  /**
+   *
+   *
+   * <pre>
+   * Required. The BigQuery data set to copy the data from with a length limit
+   * of 1,024 characters.
+   * </pre>
+   *
+   * <code>string dataset_id = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The datasetId.
+   */
+  @java.lang.Override
+  public java.lang.String getDatasetId() {
+    java.lang.Object ref = datasetId_;
+    if (ref instanceof java.lang.String) {
+      return (java.lang.String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+      java.lang.String s = bs.toStringUtf8();
+      datasetId_ = s;
+      return s;
+    }
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Required. The BigQuery data set to copy the data from with a length limit
+   * of 1,024 characters.
+   * </pre>
+   *
+   * <code>string dataset_id = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The bytes for datasetId.
+   */
+  @java.lang.Override
+  public com.google.protobuf.ByteString getDatasetIdBytes() {
+    java.lang.Object ref = datasetId_;
+    if (ref instanceof java.lang.String) {
+      com.google.protobuf.ByteString b =
+          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+      datasetId_ = b;
+      return b;
+    } else {
+      return (com.google.protobuf.ByteString) ref;
+    }
+  }
+
+  public static final int TABLE_ID_FIELD_NUMBER = 2;
+  private volatile java.lang.Object tableId_;
+  /**
+   *
+   *
+   * <pre>
+   * Required. The BigQuery table to copy the data from with a length limit of
+   * 1,024 characters.
+   * </pre>
+   *
+   * <code>string table_id = 2 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The tableId.
+   */
+  @java.lang.Override
+  public java.lang.String getTableId() {
+    java.lang.Object ref = tableId_;
+    if (ref instanceof java.lang.String) {
+      return (java.lang.String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+      java.lang.String s = bs.toStringUtf8();
+      tableId_ = s;
+      return s;
+    }
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Required. The BigQuery table to copy the data from with a length limit of
+   * 1,024 characters.
+   * </pre>
+   *
+   * <code>string table_id = 2 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The bytes for tableId.
+   */
+  @java.lang.Override
+  public com.google.protobuf.ByteString getTableIdBytes() {
+    java.lang.Object ref = tableId_;
+    if (ref instanceof java.lang.String) {
+      com.google.protobuf.ByteString b =
+          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+      tableId_ = b;
+      return b;
+    } else {
+      return (com.google.protobuf.ByteString) ref;
+    }
+  }
+
+  public static final int GCS_STAGING_DIR_FIELD_NUMBER = 3;
+  private volatile java.lang.Object gcsStagingDir_;
+  /**
+   *
+   *
+   * <pre>
+   * Intermediate Cloud Storage directory used for the import with a length
+   * limit of 2,000 characters. Can be specified if one wants to have the
+   * BigQuery export to a specific Cloud Storage directory.
+   * </pre>
+   *
+   * <code>string gcs_staging_dir = 3;</code>
+   *
+   * @return The gcsStagingDir.
+   */
+  @java.lang.Override
+  public java.lang.String getGcsStagingDir() {
+    java.lang.Object ref = gcsStagingDir_;
+    if (ref instanceof java.lang.String) {
+      return (java.lang.String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+      java.lang.String s = bs.toStringUtf8();
+      gcsStagingDir_ = s;
+      return s;
+    }
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Intermediate Cloud Storage directory used for the import with a length
+   * limit of 2,000 characters. Can be specified if one wants to have the
+   * BigQuery export to a specific Cloud Storage directory.
+   * </pre>
+   *
+   * <code>string gcs_staging_dir = 3;</code>
+   *
+   * @return The bytes for gcsStagingDir.
+   */
+  @java.lang.Override
+  public com.google.protobuf.ByteString getGcsStagingDirBytes() {
+    java.lang.Object ref = gcsStagingDir_;
+    if (ref instanceof java.lang.String) {
+      com.google.protobuf.ByteString b =
+          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+      gcsStagingDir_ = b;
+      return b;
+    } else {
+      return (com.google.protobuf.ByteString) ref;
+    }
+  }
+
+  public static final int DATA_SCHEMA_FIELD_NUMBER = 4;
+  private volatile java.lang.Object dataSchema_;
+  /**
+   *
+   *
+   * <pre>
+   * The schema to use when parsing the data from the source.
+   * Supported values for product imports:
+   * * `product` (default): One JSON [Product][google.cloud.retail.v2.Product]
+   * per line. Each product must
+   *   have a valid [Product.id][google.cloud.retail.v2.Product.id].
+   * * `product_merchant_center`: See [Importing catalog data from Merchant
+   *   Center](/retail/recommendations-ai/docs/upload-catalog#mc).
+   * Supported values for user events imports:
+   * * `user_event` (default): One JSON
+   * [UserEvent][google.cloud.retail.v2.UserEvent] per line.
+   * * `user_event_ga360`: Using
+   *   https://support.google.com/analytics/answer/3437719?hl=en.
+   * </pre>
+   *
+   * <code>string data_schema = 4;</code>
+   *
+   * @return The dataSchema.
+   */
+  @java.lang.Override
+  public java.lang.String getDataSchema() {
+    java.lang.Object ref = dataSchema_;
+    if (ref instanceof java.lang.String) {
+      return (java.lang.String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+      java.lang.String s = bs.toStringUtf8();
+      dataSchema_ = s;
+      return s;
+    }
+  }
+  /**
+   *
+   *
+   * <pre>
+   * The schema to use when parsing the data from the source.
+   * Supported values for product imports:
+   * * `product` (default): One JSON [Product][google.cloud.retail.v2.Product]
+   * per line. Each product must
+   *   have a valid [Product.id][google.cloud.retail.v2.Product.id].
+   * * `product_merchant_center`: See [Importing catalog data from Merchant
+   *   Center](/retail/recommendations-ai/docs/upload-catalog#mc).
+   * Supported values for user events imports:
+   * * `user_event` (default): One JSON
+   * [UserEvent][google.cloud.retail.v2.UserEvent] per line.
+   * * `user_event_ga360`: Using
+   *   https://support.google.com/analytics/answer/3437719?hl=en.
+   * </pre>
+   *
+   * <code>string data_schema = 4;</code>
+   *
+   * @return The bytes for dataSchema.
+   */
+  @java.lang.Override
+  public com.google.protobuf.ByteString getDataSchemaBytes() {
+    java.lang.Object ref = dataSchema_;
+    if (ref instanceof java.lang.String) {
+      com.google.protobuf.ByteString b =
+          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+      dataSchema_ = b;
+      return b;
+    } else {
+      return (com.google.protobuf.ByteString) ref;
+    }
+  }
+
+  private byte memoizedIsInitialized = -1;
+
+  @java.lang.Override
+  public final boolean isInitialized() {
+    byte isInitialized = memoizedIsInitialized;
+    if (isInitialized == 1) return true;
+    if (isInitialized == 0) return false;
+
+    memoizedIsInitialized = 1;
+    return true;
+  }
+
+  @java.lang.Override
+  public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
+    if (!getDatasetIdBytes().isEmpty()) {
+      com.google.protobuf.GeneratedMessageV3.writeString(output, 1, datasetId_);
+    }
+    if (!getTableIdBytes().isEmpty()) {
+      com.google.protobuf.GeneratedMessageV3.writeString(output, 2, tableId_);
+    }
+    if (!getGcsStagingDirBytes().isEmpty()) {
+      com.google.protobuf.GeneratedMessageV3.writeString(output, 3, gcsStagingDir_);
+    }
+    if (!getDataSchemaBytes().isEmpty()) {
+      com.google.protobuf.GeneratedMessageV3.writeString(output, 4, dataSchema_);
+    }
+    if (!getProjectIdBytes().isEmpty()) {
+      com.google.protobuf.GeneratedMessageV3.writeString(output, 5, projectId_);
+    }
+    unknownFields.writeTo(output);
+  }
+
+  @java.lang.Override
+  public int getSerializedSize() {
+    int size = memoizedSize;
+    if (size != -1) return size;
+
+    size = 0;
+    if (!getDatasetIdBytes().isEmpty()) {
+      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(1, datasetId_);
+    }
+    if (!getTableIdBytes().isEmpty()) {
+      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(2, tableId_);
+    }
+    if (!getGcsStagingDirBytes().isEmpty()) {
+      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(3, gcsStagingDir_);
+    }
+    if (!getDataSchemaBytes().isEmpty()) {
+      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(4, dataSchema_);
+    }
+    if (!getProjectIdBytes().isEmpty()) {
+      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(5, projectId_);
+    }
+    size += unknownFields.getSerializedSize();
+    memoizedSize = size;
+    return size;
+  }
+
+  @java.lang.Override
+  public boolean equals(final java.lang.Object obj) {
+    if (obj == this) {
+      return true;
+    }
+    if (!(obj instanceof com.google.cloud.retail.v2.BigQuerySource)) {
+      return super.equals(obj);
+    }
+    com.google.cloud.retail.v2.BigQuerySource other =
+        (com.google.cloud.retail.v2.BigQuerySource) obj;
+
+    if (!getProjectId().equals(other.getProjectId())) return false;
+    if (!getDatasetId().equals(other.getDatasetId())) return false;
+    if (!getTableId().equals(other.getTableId())) return false;
+    if (!getGcsStagingDir().equals(other.getGcsStagingDir())) return false;
+    if (!getDataSchema().equals(other.getDataSchema())) return false;
+    if (!unknownFields.equals(other.unknownFields)) return false;
+    return true;
+  }
+
+  @java.lang.Override
+  public int hashCode() {
+    if (memoizedHashCode != 0) {
+      return memoizedHashCode;
+    }
+    int hash = 41;
+    hash = (19 * hash) + getDescriptor().hashCode();
+    hash = (37 * hash) + PROJECT_ID_FIELD_NUMBER;
+    hash = (53 * hash) + getProjectId().hashCode();
+    hash = (37 * hash) + DATASET_ID_FIELD_NUMBER;
+    hash = (53 * hash) + getDatasetId().hashCode();
+    hash = (37 * hash) + TABLE_ID_FIELD_NUMBER;
+    hash = (53 * hash) + getTableId().hashCode();
+    hash = (37 * hash) + GCS_STAGING_DIR_FIELD_NUMBER;
+    hash = (53 * hash) + getGcsStagingDir().hashCode();
+    hash = (37 * hash) + DATA_SCHEMA_FIELD_NUMBER;
+    hash = (53 * hash) + getDataSchema().hashCode();
+    hash = (29 * hash) + unknownFields.hashCode();
+    memoizedHashCode = hash;
+    return hash;
+  }
+
+  public static com.google.cloud.retail.v2.BigQuerySource parseFrom(java.nio.ByteBuffer data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.BigQuerySource parseFrom(
+      java.nio.ByteBuffer data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.BigQuerySource parseFrom(
+      com.google.protobuf.ByteString data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.BigQuerySource parseFrom(
+      com.google.protobuf.ByteString data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.BigQuerySource parseFrom(byte[] data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.BigQuerySource parseFrom(
+      byte[] data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.BigQuerySource parseFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.BigQuerySource parseFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.BigQuerySource parseDelimitedFrom(
+      java.io.InputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.BigQuerySource parseDelimitedFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.BigQuerySource parseFrom(
+      com.google.protobuf.CodedInputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.BigQuerySource parseFrom(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  @java.lang.Override
+  public Builder newBuilderForType() {
+    return newBuilder();
+  }
+
+  public static Builder newBuilder() {
+    return DEFAULT_INSTANCE.toBuilder();
+  }
+
+  public static Builder newBuilder(com.google.cloud.retail.v2.BigQuerySource prototype) {
+    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+  }
+
+  @java.lang.Override
+  public Builder toBuilder() {
+    return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
+  }
+
+  @java.lang.Override
+  protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+    Builder builder = new Builder(parent);
+    return builder;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * BigQuery source import data from.
+   * </pre>
+   *
+   * Protobuf type {@code google.cloud.retail.v2.BigQuerySource}
+   */
+  public static final class Builder extends com.google.protobuf.GeneratedMessageV3.Builder<Builder>
+      implements
+      // @@protoc_insertion_point(builder_implements:google.cloud.retail.v2.BigQuerySource)
+      com.google.cloud.retail.v2.BigQuerySourceOrBuilder {
+    public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+      return com.google.cloud.retail.v2.ImportConfigProto
+          .internal_static_google_cloud_retail_v2_BigQuerySource_descriptor;
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return com.google.cloud.retail.v2.ImportConfigProto
+          .internal_static_google_cloud_retail_v2_BigQuerySource_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              com.google.cloud.retail.v2.BigQuerySource.class,
+              com.google.cloud.retail.v2.BigQuerySource.Builder.class);
+    }
+
+    // Construct using com.google.cloud.retail.v2.BigQuerySource.newBuilder()
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
+
+    private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+      super(parent);
+      maybeForceBuilderInitialization();
+    }
+
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders) {}
+    }
+
+    @java.lang.Override
+    public Builder clear() {
+      super.clear();
+      projectId_ = "";
+
+      datasetId_ = "";
+
+      tableId_ = "";
+
+      gcsStagingDir_ = "";
+
+      dataSchema_ = "";
+
+      return this;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
+      return com.google.cloud.retail.v2.ImportConfigProto
+          .internal_static_google_cloud_retail_v2_BigQuerySource_descriptor;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.BigQuerySource getDefaultInstanceForType() {
+      return com.google.cloud.retail.v2.BigQuerySource.getDefaultInstance();
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.BigQuerySource build() {
+      com.google.cloud.retail.v2.BigQuerySource result = buildPartial();
+      if (!result.isInitialized()) {
+        throw newUninitializedMessageException(result);
+      }
+      return result;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.BigQuerySource buildPartial() {
+      com.google.cloud.retail.v2.BigQuerySource result =
+          new com.google.cloud.retail.v2.BigQuerySource(this);
+      result.projectId_ = projectId_;
+      result.datasetId_ = datasetId_;
+      result.tableId_ = tableId_;
+      result.gcsStagingDir_ = gcsStagingDir_;
+      result.dataSchema_ = dataSchema_;
+      onBuilt();
+      return result;
+    }
+
+    @java.lang.Override
+    public Builder clone() {
+      return super.clone();
+    }
+
+    @java.lang.Override
+    public Builder setField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.setField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
+      return super.clearField(field);
+    }
+
+    @java.lang.Override
+    public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+      return super.clearOneof(oneof);
+    }
+
+    @java.lang.Override
+    public Builder setRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, int index, java.lang.Object value) {
+      return super.setRepeatedField(field, index, value);
+    }
+
+    @java.lang.Override
+    public Builder addRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.addRepeatedField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(com.google.protobuf.Message other) {
+      if (other instanceof com.google.cloud.retail.v2.BigQuerySource) {
+        return mergeFrom((com.google.cloud.retail.v2.BigQuerySource) other);
+      } else {
+        super.mergeFrom(other);
+        return this;
+      }
+    }
+
+    public Builder mergeFrom(com.google.cloud.retail.v2.BigQuerySource other) {
+      if (other == com.google.cloud.retail.v2.BigQuerySource.getDefaultInstance()) return this;
+      if (!other.getProjectId().isEmpty()) {
+        projectId_ = other.projectId_;
+        onChanged();
+      }
+      if (!other.getDatasetId().isEmpty()) {
+        datasetId_ = other.datasetId_;
+        onChanged();
+      }
+      if (!other.getTableId().isEmpty()) {
+        tableId_ = other.tableId_;
+        onChanged();
+      }
+      if (!other.getGcsStagingDir().isEmpty()) {
+        gcsStagingDir_ = other.gcsStagingDir_;
+        onChanged();
+      }
+      if (!other.getDataSchema().isEmpty()) {
+        dataSchema_ = other.dataSchema_;
+        onChanged();
+      }
+      this.mergeUnknownFields(other.unknownFields);
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final boolean isInitialized() {
+      return true;
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      com.google.cloud.retail.v2.BigQuerySource parsedMessage = null;
+      try {
+        parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        parsedMessage = (com.google.cloud.retail.v2.BigQuerySource) e.getUnfinishedMessage();
+        throw e.unwrapIOException();
+      } finally {
+        if (parsedMessage != null) {
+          mergeFrom(parsedMessage);
+        }
+      }
+      return this;
+    }
+
+    private java.lang.Object projectId_ = "";
+    /**
+     *
+     *
+     * <pre>
+     * The project id (can be project # or id) that the BigQuery source is in with
+     * a length limit of 128 characters. If not specified, inherits the project
+     * id from the parent request.
+     * </pre>
+     *
+     * <code>string project_id = 5;</code>
+     *
+     * @return The projectId.
+     */
+    public java.lang.String getProjectId() {
+      java.lang.Object ref = projectId_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        projectId_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The project id (can be project # or id) that the BigQuery source is in with
+     * a length limit of 128 characters. If not specified, inherits the project
+     * id from the parent request.
+     * </pre>
+     *
+     * <code>string project_id = 5;</code>
+     *
+     * @return The bytes for projectId.
+     */
+    public com.google.protobuf.ByteString getProjectIdBytes() {
+      java.lang.Object ref = projectId_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b =
+            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+        projectId_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The project id (can be project # or id) that the BigQuery source is in with
+     * a length limit of 128 characters. If not specified, inherits the project
+     * id from the parent request.
+     * </pre>
+     *
+     * <code>string project_id = 5;</code>
+     *
+     * @param value The projectId to set.
+     * @return This builder for chaining.
+     */
+    public Builder setProjectId(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+
+      projectId_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The project id (can be project # or id) that the BigQuery source is in with
+     * a length limit of 128 characters. If not specified, inherits the project
+     * id from the parent request.
+     * </pre>
+     *
+     * <code>string project_id = 5;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearProjectId() {
+
+      projectId_ = getDefaultInstance().getProjectId();
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The project id (can be project # or id) that the BigQuery source is in with
+     * a length limit of 128 characters. If not specified, inherits the project
+     * id from the parent request.
+     * </pre>
+     *
+     * <code>string project_id = 5;</code>
+     *
+     * @param value The bytes for projectId to set.
+     * @return This builder for chaining.
+     */
+    public Builder setProjectIdBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+
+      projectId_ = value;
+      onChanged();
+      return this;
+    }
+
+    private java.lang.Object datasetId_ = "";
+    /**
+     *
+     *
+     * <pre>
+     * Required. The BigQuery data set to copy the data from with a length limit
+     * of 1,024 characters.
+     * </pre>
+     *
+     * <code>string dataset_id = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @return The datasetId.
+     */
+    public java.lang.String getDatasetId() {
+      java.lang.Object ref = datasetId_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        datasetId_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The BigQuery data set to copy the data from with a length limit
+     * of 1,024 characters.
+     * </pre>
+     *
+     * <code>string dataset_id = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @return The bytes for datasetId.
+     */
+    public com.google.protobuf.ByteString getDatasetIdBytes() {
+      java.lang.Object ref = datasetId_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b =
+            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+        datasetId_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The BigQuery data set to copy the data from with a length limit
+     * of 1,024 characters.
+     * </pre>
+     *
+     * <code>string dataset_id = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @param value The datasetId to set.
+     * @return This builder for chaining.
+     */
+    public Builder setDatasetId(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+
+      datasetId_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The BigQuery data set to copy the data from with a length limit
+     * of 1,024 characters.
+     * </pre>
+     *
+     * <code>string dataset_id = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearDatasetId() {
+
+      datasetId_ = getDefaultInstance().getDatasetId();
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The BigQuery data set to copy the data from with a length limit
+     * of 1,024 characters.
+     * </pre>
+     *
+     * <code>string dataset_id = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @param value The bytes for datasetId to set.
+     * @return This builder for chaining.
+     */
+    public Builder setDatasetIdBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+
+      datasetId_ = value;
+      onChanged();
+      return this;
+    }
+
+    private java.lang.Object tableId_ = "";
+    /**
+     *
+     *
+     * <pre>
+     * Required. The BigQuery table to copy the data from with a length limit of
+     * 1,024 characters.
+     * </pre>
+     *
+     * <code>string table_id = 2 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @return The tableId.
+     */
+    public java.lang.String getTableId() {
+      java.lang.Object ref = tableId_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        tableId_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The BigQuery table to copy the data from with a length limit of
+     * 1,024 characters.
+     * </pre>
+     *
+     * <code>string table_id = 2 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @return The bytes for tableId.
+     */
+    public com.google.protobuf.ByteString getTableIdBytes() {
+      java.lang.Object ref = tableId_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b =
+            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+        tableId_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The BigQuery table to copy the data from with a length limit of
+     * 1,024 characters.
+     * </pre>
+     *
+     * <code>string table_id = 2 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @param value The tableId to set.
+     * @return This builder for chaining.
+     */
+    public Builder setTableId(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+
+      tableId_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The BigQuery table to copy the data from with a length limit of
+     * 1,024 characters.
+     * </pre>
+     *
+     * <code>string table_id = 2 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearTableId() {
+
+      tableId_ = getDefaultInstance().getTableId();
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The BigQuery table to copy the data from with a length limit of
+     * 1,024 characters.
+     * </pre>
+     *
+     * <code>string table_id = 2 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @param value The bytes for tableId to set.
+     * @return This builder for chaining.
+     */
+    public Builder setTableIdBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+
+      tableId_ = value;
+      onChanged();
+      return this;
+    }
+
+    private java.lang.Object gcsStagingDir_ = "";
+    /**
+     *
+     *
+     * <pre>
+     * Intermediate Cloud Storage directory used for the import with a length
+     * limit of 2,000 characters. Can be specified if one wants to have the
+     * BigQuery export to a specific Cloud Storage directory.
+     * </pre>
+     *
+     * <code>string gcs_staging_dir = 3;</code>
+     *
+     * @return The gcsStagingDir.
+     */
+    public java.lang.String getGcsStagingDir() {
+      java.lang.Object ref = gcsStagingDir_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        gcsStagingDir_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Intermediate Cloud Storage directory used for the import with a length
+     * limit of 2,000 characters. Can be specified if one wants to have the
+     * BigQuery export to a specific Cloud Storage directory.
+     * </pre>
+     *
+     * <code>string gcs_staging_dir = 3;</code>
+     *
+     * @return The bytes for gcsStagingDir.
+     */
+    public com.google.protobuf.ByteString getGcsStagingDirBytes() {
+      java.lang.Object ref = gcsStagingDir_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b =
+            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+        gcsStagingDir_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Intermediate Cloud Storage directory used for the import with a length
+     * limit of 2,000 characters. Can be specified if one wants to have the
+     * BigQuery export to a specific Cloud Storage directory.
+     * </pre>
+     *
+     * <code>string gcs_staging_dir = 3;</code>
+     *
+     * @param value The gcsStagingDir to set.
+     * @return This builder for chaining.
+     */
+    public Builder setGcsStagingDir(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+
+      gcsStagingDir_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Intermediate Cloud Storage directory used for the import with a length
+     * limit of 2,000 characters. Can be specified if one wants to have the
+     * BigQuery export to a specific Cloud Storage directory.
+     * </pre>
+     *
+     * <code>string gcs_staging_dir = 3;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearGcsStagingDir() {
+
+      gcsStagingDir_ = getDefaultInstance().getGcsStagingDir();
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Intermediate Cloud Storage directory used for the import with a length
+     * limit of 2,000 characters. Can be specified if one wants to have the
+     * BigQuery export to a specific Cloud Storage directory.
+     * </pre>
+     *
+     * <code>string gcs_staging_dir = 3;</code>
+     *
+     * @param value The bytes for gcsStagingDir to set.
+     * @return This builder for chaining.
+     */
+    public Builder setGcsStagingDirBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+
+      gcsStagingDir_ = value;
+      onChanged();
+      return this;
+    }
+
+    private java.lang.Object dataSchema_ = "";
+    /**
+     *
+     *
+     * <pre>
+     * The schema to use when parsing the data from the source.
+     * Supported values for product imports:
+     * * `product` (default): One JSON [Product][google.cloud.retail.v2.Product]
+     * per line. Each product must
+     *   have a valid [Product.id][google.cloud.retail.v2.Product.id].
+     * * `product_merchant_center`: See [Importing catalog data from Merchant
+     *   Center](/retail/recommendations-ai/docs/upload-catalog#mc).
+     * Supported values for user events imports:
+     * * `user_event` (default): One JSON
+     * [UserEvent][google.cloud.retail.v2.UserEvent] per line.
+     * * `user_event_ga360`: Using
+     *   https://support.google.com/analytics/answer/3437719?hl=en.
+     * </pre>
+     *
+     * <code>string data_schema = 4;</code>
+     *
+     * @return The dataSchema.
+     */
+    public java.lang.String getDataSchema() {
+      java.lang.Object ref = dataSchema_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        dataSchema_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The schema to use when parsing the data from the source.
+     * Supported values for product imports:
+     * * `product` (default): One JSON [Product][google.cloud.retail.v2.Product]
+     * per line. Each product must
+     *   have a valid [Product.id][google.cloud.retail.v2.Product.id].
+     * * `product_merchant_center`: See [Importing catalog data from Merchant
+     *   Center](/retail/recommendations-ai/docs/upload-catalog#mc).
+     * Supported values for user events imports:
+     * * `user_event` (default): One JSON
+     * [UserEvent][google.cloud.retail.v2.UserEvent] per line.
+     * * `user_event_ga360`: Using
+     *   https://support.google.com/analytics/answer/3437719?hl=en.
+     * </pre>
+     *
+     * <code>string data_schema = 4;</code>
+     *
+     * @return The bytes for dataSchema.
+     */
+    public com.google.protobuf.ByteString getDataSchemaBytes() {
+      java.lang.Object ref = dataSchema_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b =
+            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+        dataSchema_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The schema to use when parsing the data from the source.
+     * Supported values for product imports:
+     * * `product` (default): One JSON [Product][google.cloud.retail.v2.Product]
+     * per line. Each product must
+     *   have a valid [Product.id][google.cloud.retail.v2.Product.id].
+     * * `product_merchant_center`: See [Importing catalog data from Merchant
+     *   Center](/retail/recommendations-ai/docs/upload-catalog#mc).
+     * Supported values for user events imports:
+     * * `user_event` (default): One JSON
+     * [UserEvent][google.cloud.retail.v2.UserEvent] per line.
+     * * `user_event_ga360`: Using
+     *   https://support.google.com/analytics/answer/3437719?hl=en.
+     * </pre>
+     *
+     * <code>string data_schema = 4;</code>
+     *
+     * @param value The dataSchema to set.
+     * @return This builder for chaining.
+     */
+    public Builder setDataSchema(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+
+      dataSchema_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The schema to use when parsing the data from the source.
+     * Supported values for product imports:
+     * * `product` (default): One JSON [Product][google.cloud.retail.v2.Product]
+     * per line. Each product must
+     *   have a valid [Product.id][google.cloud.retail.v2.Product.id].
+     * * `product_merchant_center`: See [Importing catalog data from Merchant
+     *   Center](/retail/recommendations-ai/docs/upload-catalog#mc).
+     * Supported values for user events imports:
+     * * `user_event` (default): One JSON
+     * [UserEvent][google.cloud.retail.v2.UserEvent] per line.
+     * * `user_event_ga360`: Using
+     *   https://support.google.com/analytics/answer/3437719?hl=en.
+     * </pre>
+     *
+     * <code>string data_schema = 4;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearDataSchema() {
+
+      dataSchema_ = getDefaultInstance().getDataSchema();
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The schema to use when parsing the data from the source.
+     * Supported values for product imports:
+     * * `product` (default): One JSON [Product][google.cloud.retail.v2.Product]
+     * per line. Each product must
+     *   have a valid [Product.id][google.cloud.retail.v2.Product.id].
+     * * `product_merchant_center`: See [Importing catalog data from Merchant
+     *   Center](/retail/recommendations-ai/docs/upload-catalog#mc).
+     * Supported values for user events imports:
+     * * `user_event` (default): One JSON
+     * [UserEvent][google.cloud.retail.v2.UserEvent] per line.
+     * * `user_event_ga360`: Using
+     *   https://support.google.com/analytics/answer/3437719?hl=en.
+     * </pre>
+     *
+     * <code>string data_schema = 4;</code>
+     *
+     * @param value The bytes for dataSchema to set.
+     * @return This builder for chaining.
+     */
+    public Builder setDataSchemaBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+
+      dataSchema_ = value;
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.setUnknownFields(unknownFields);
+    }
+
+    @java.lang.Override
+    public final Builder mergeUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.mergeUnknownFields(unknownFields);
+    }
+
+    // @@protoc_insertion_point(builder_scope:google.cloud.retail.v2.BigQuerySource)
+  }
+
+  // @@protoc_insertion_point(class_scope:google.cloud.retail.v2.BigQuerySource)
+  private static final com.google.cloud.retail.v2.BigQuerySource DEFAULT_INSTANCE;
+
+  static {
+    DEFAULT_INSTANCE = new com.google.cloud.retail.v2.BigQuerySource();
+  }
+
+  public static com.google.cloud.retail.v2.BigQuerySource getDefaultInstance() {
+    return DEFAULT_INSTANCE;
+  }
+
+  private static final com.google.protobuf.Parser<BigQuerySource> PARSER =
+      new com.google.protobuf.AbstractParser<BigQuerySource>() {
+        @java.lang.Override
+        public BigQuerySource parsePartialFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws com.google.protobuf.InvalidProtocolBufferException {
+          return new BigQuerySource(input, extensionRegistry);
+        }
+      };
+
+  public static com.google.protobuf.Parser<BigQuerySource> parser() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.protobuf.Parser<BigQuerySource> getParserForType() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.cloud.retail.v2.BigQuerySource getDefaultInstanceForType() {
+    return DEFAULT_INSTANCE;
+  }
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/BigQuerySourceOrBuilder.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/BigQuerySourceOrBuilder.java
new file mode 100644
index 00000000..05996a9e
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/BigQuerySourceOrBuilder.java
@@ -0,0 +1,184 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/import_config.proto
+
+package com.google.cloud.retail.v2;
+
+public interface BigQuerySourceOrBuilder
+    extends
+    // @@protoc_insertion_point(interface_extends:google.cloud.retail.v2.BigQuerySource)
+    com.google.protobuf.MessageOrBuilder {
+
+  /**
+   *
+   *
+   * <pre>
+   * The project id (can be project # or id) that the BigQuery source is in with
+   * a length limit of 128 characters. If not specified, inherits the project
+   * id from the parent request.
+   * </pre>
+   *
+   * <code>string project_id = 5;</code>
+   *
+   * @return The projectId.
+   */
+  java.lang.String getProjectId();
+  /**
+   *
+   *
+   * <pre>
+   * The project id (can be project # or id) that the BigQuery source is in with
+   * a length limit of 128 characters. If not specified, inherits the project
+   * id from the parent request.
+   * </pre>
+   *
+   * <code>string project_id = 5;</code>
+   *
+   * @return The bytes for projectId.
+   */
+  com.google.protobuf.ByteString getProjectIdBytes();
+
+  /**
+   *
+   *
+   * <pre>
+   * Required. The BigQuery data set to copy the data from with a length limit
+   * of 1,024 characters.
+   * </pre>
+   *
+   * <code>string dataset_id = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The datasetId.
+   */
+  java.lang.String getDatasetId();
+  /**
+   *
+   *
+   * <pre>
+   * Required. The BigQuery data set to copy the data from with a length limit
+   * of 1,024 characters.
+   * </pre>
+   *
+   * <code>string dataset_id = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The bytes for datasetId.
+   */
+  com.google.protobuf.ByteString getDatasetIdBytes();
+
+  /**
+   *
+   *
+   * <pre>
+   * Required. The BigQuery table to copy the data from with a length limit of
+   * 1,024 characters.
+   * </pre>
+   *
+   * <code>string table_id = 2 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The tableId.
+   */
+  java.lang.String getTableId();
+  /**
+   *
+   *
+   * <pre>
+   * Required. The BigQuery table to copy the data from with a length limit of
+   * 1,024 characters.
+   * </pre>
+   *
+   * <code>string table_id = 2 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The bytes for tableId.
+   */
+  com.google.protobuf.ByteString getTableIdBytes();
+
+  /**
+   *
+   *
+   * <pre>
+   * Intermediate Cloud Storage directory used for the import with a length
+   * limit of 2,000 characters. Can be specified if one wants to have the
+   * BigQuery export to a specific Cloud Storage directory.
+   * </pre>
+   *
+   * <code>string gcs_staging_dir = 3;</code>
+   *
+   * @return The gcsStagingDir.
+   */
+  java.lang.String getGcsStagingDir();
+  /**
+   *
+   *
+   * <pre>
+   * Intermediate Cloud Storage directory used for the import with a length
+   * limit of 2,000 characters. Can be specified if one wants to have the
+   * BigQuery export to a specific Cloud Storage directory.
+   * </pre>
+   *
+   * <code>string gcs_staging_dir = 3;</code>
+   *
+   * @return The bytes for gcsStagingDir.
+   */
+  com.google.protobuf.ByteString getGcsStagingDirBytes();
+
+  /**
+   *
+   *
+   * <pre>
+   * The schema to use when parsing the data from the source.
+   * Supported values for product imports:
+   * * `product` (default): One JSON [Product][google.cloud.retail.v2.Product]
+   * per line. Each product must
+   *   have a valid [Product.id][google.cloud.retail.v2.Product.id].
+   * * `product_merchant_center`: See [Importing catalog data from Merchant
+   *   Center](/retail/recommendations-ai/docs/upload-catalog#mc).
+   * Supported values for user events imports:
+   * * `user_event` (default): One JSON
+   * [UserEvent][google.cloud.retail.v2.UserEvent] per line.
+   * * `user_event_ga360`: Using
+   *   https://support.google.com/analytics/answer/3437719?hl=en.
+   * </pre>
+   *
+   * <code>string data_schema = 4;</code>
+   *
+   * @return The dataSchema.
+   */
+  java.lang.String getDataSchema();
+  /**
+   *
+   *
+   * <pre>
+   * The schema to use when parsing the data from the source.
+   * Supported values for product imports:
+   * * `product` (default): One JSON [Product][google.cloud.retail.v2.Product]
+   * per line. Each product must
+   *   have a valid [Product.id][google.cloud.retail.v2.Product.id].
+   * * `product_merchant_center`: See [Importing catalog data from Merchant
+   *   Center](/retail/recommendations-ai/docs/upload-catalog#mc).
+   * Supported values for user events imports:
+   * * `user_event` (default): One JSON
+   * [UserEvent][google.cloud.retail.v2.UserEvent] per line.
+   * * `user_event_ga360`: Using
+   *   https://support.google.com/analytics/answer/3437719?hl=en.
+   * </pre>
+   *
+   * <code>string data_schema = 4;</code>
+   *
+   * @return The bytes for dataSchema.
+   */
+  com.google.protobuf.ByteString getDataSchemaBytes();
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/BranchName.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/BranchName.java
new file mode 100644
index 00000000..2157b935
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/BranchName.java
@@ -0,0 +1,257 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.cloud.retail.v2;
+
+import com.google.api.pathtemplate.PathTemplate;
+import com.google.api.resourcenames.ResourceName;
+import com.google.common.base.Preconditions;
+import com.google.common.collect.ImmutableMap;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import javax.annotation.Generated;
+
+// AUTO-GENERATED DOCUMENTATION AND CLASS.
+@Generated("by gapic-generator-java")
+public class BranchName implements ResourceName {
+  private static final PathTemplate PROJECT_LOCATION_CATALOG_BRANCH =
+      PathTemplate.createWithoutUrlEncoding(
+          "projects/{project}/locations/{location}/catalogs/{catalog}/branches/{branch}");
+  private volatile Map<String, String> fieldValuesMap;
+  private final String project;
+  private final String location;
+  private final String catalog;
+  private final String branch;
+
+  @Deprecated
+  protected BranchName() {
+    project = null;
+    location = null;
+    catalog = null;
+    branch = null;
+  }
+
+  private BranchName(Builder builder) {
+    project = Preconditions.checkNotNull(builder.getProject());
+    location = Preconditions.checkNotNull(builder.getLocation());
+    catalog = Preconditions.checkNotNull(builder.getCatalog());
+    branch = Preconditions.checkNotNull(builder.getBranch());
+  }
+
+  public String getProject() {
+    return project;
+  }
+
+  public String getLocation() {
+    return location;
+  }
+
+  public String getCatalog() {
+    return catalog;
+  }
+
+  public String getBranch() {
+    return branch;
+  }
+
+  public static Builder newBuilder() {
+    return new Builder();
+  }
+
+  public Builder toBuilder() {
+    return new Builder(this);
+  }
+
+  public static BranchName of(String project, String location, String catalog, String branch) {
+    return newBuilder()
+        .setProject(project)
+        .setLocation(location)
+        .setCatalog(catalog)
+        .setBranch(branch)
+        .build();
+  }
+
+  public static String format(String project, String location, String catalog, String branch) {
+    return newBuilder()
+        .setProject(project)
+        .setLocation(location)
+        .setCatalog(catalog)
+        .setBranch(branch)
+        .build()
+        .toString();
+  }
+
+  public static BranchName parse(String formattedString) {
+    if (formattedString.isEmpty()) {
+      return null;
+    }
+    Map<String, String> matchMap =
+        PROJECT_LOCATION_CATALOG_BRANCH.validatedMatch(
+            formattedString, "BranchName.parse: formattedString not in valid format");
+    return of(
+        matchMap.get("project"),
+        matchMap.get("location"),
+        matchMap.get("catalog"),
+        matchMap.get("branch"));
+  }
+
+  public static List<BranchName> parseList(List<String> formattedStrings) {
+    List<BranchName> list = new ArrayList<>(formattedStrings.size());
+    for (String formattedString : formattedStrings) {
+      list.add(parse(formattedString));
+    }
+    return list;
+  }
+
+  public static List<String> toStringList(List<BranchName> values) {
+    List<String> list = new ArrayList<>(values.size());
+    for (BranchName value : values) {
+      if (value == null) {
+        list.add("");
+      } else {
+        list.add(value.toString());
+      }
+    }
+    return list;
+  }
+
+  public static boolean isParsableFrom(String formattedString) {
+    return PROJECT_LOCATION_CATALOG_BRANCH.matches(formattedString);
+  }
+
+  @Override
+  public Map<String, String> getFieldValuesMap() {
+    if (fieldValuesMap == null) {
+      synchronized (this) {
+        if (fieldValuesMap == null) {
+          ImmutableMap.Builder<String, String> fieldMapBuilder = ImmutableMap.builder();
+          if (project != null) {
+            fieldMapBuilder.put("project", project);
+          }
+          if (location != null) {
+            fieldMapBuilder.put("location", location);
+          }
+          if (catalog != null) {
+            fieldMapBuilder.put("catalog", catalog);
+          }
+          if (branch != null) {
+            fieldMapBuilder.put("branch", branch);
+          }
+          fieldValuesMap = fieldMapBuilder.build();
+        }
+      }
+    }
+    return fieldValuesMap;
+  }
+
+  public String getFieldValue(String fieldName) {
+    return getFieldValuesMap().get(fieldName);
+  }
+
+  @Override
+  public String toString() {
+    return PROJECT_LOCATION_CATALOG_BRANCH.instantiate(
+        "project", project, "location", location, "catalog", catalog, "branch", branch);
+  }
+
+  @Override
+  public boolean equals(Object o) {
+    if (o == this) {
+      return true;
+    }
+    if (o != null || getClass() == o.getClass()) {
+      BranchName that = ((BranchName) o);
+      return Objects.equals(this.project, that.project)
+          && Objects.equals(this.location, that.location)
+          && Objects.equals(this.catalog, that.catalog)
+          && Objects.equals(this.branch, that.branch);
+    }
+    return false;
+  }
+
+  @Override
+  public int hashCode() {
+    int h = 1;
+    h *= 1000003;
+    h ^= Objects.hashCode(project);
+    h *= 1000003;
+    h ^= Objects.hashCode(location);
+    h *= 1000003;
+    h ^= Objects.hashCode(catalog);
+    h *= 1000003;
+    h ^= Objects.hashCode(branch);
+    return h;
+  }
+
+  /** Builder for projects/{project}/locations/{location}/catalogs/{catalog}/branches/{branch}. */
+  public static class Builder {
+    private String project;
+    private String location;
+    private String catalog;
+    private String branch;
+
+    protected Builder() {}
+
+    public String getProject() {
+      return project;
+    }
+
+    public String getLocation() {
+      return location;
+    }
+
+    public String getCatalog() {
+      return catalog;
+    }
+
+    public String getBranch() {
+      return branch;
+    }
+
+    public Builder setProject(String project) {
+      this.project = project;
+      return this;
+    }
+
+    public Builder setLocation(String location) {
+      this.location = location;
+      return this;
+    }
+
+    public Builder setCatalog(String catalog) {
+      this.catalog = catalog;
+      return this;
+    }
+
+    public Builder setBranch(String branch) {
+      this.branch = branch;
+      return this;
+    }
+
+    private Builder(BranchName branchName) {
+      project = branchName.project;
+      location = branchName.location;
+      catalog = branchName.catalog;
+      branch = branchName.branch;
+    }
+
+    public BranchName build() {
+      return new BranchName(this);
+    }
+  }
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/Catalog.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/Catalog.java
new file mode 100644
index 00000000..e1a25bdc
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/Catalog.java
@@ -0,0 +1,1154 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/catalog.proto
+
+package com.google.cloud.retail.v2;
+
+/**
+ *
+ *
+ * <pre>
+ * The catalog configuration.
+ * </pre>
+ *
+ * Protobuf type {@code google.cloud.retail.v2.Catalog}
+ */
+public final class Catalog extends com.google.protobuf.GeneratedMessageV3
+    implements
+    // @@protoc_insertion_point(message_implements:google.cloud.retail.v2.Catalog)
+    CatalogOrBuilder {
+  private static final long serialVersionUID = 0L;
+  // Use Catalog.newBuilder() to construct.
+  private Catalog(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+    super(builder);
+  }
+
+  private Catalog() {
+    name_ = "";
+    displayName_ = "";
+  }
+
+  @java.lang.Override
+  @SuppressWarnings({"unused"})
+  protected java.lang.Object newInstance(UnusedPrivateParameter unused) {
+    return new Catalog();
+  }
+
+  @java.lang.Override
+  public final com.google.protobuf.UnknownFieldSet getUnknownFields() {
+    return this.unknownFields;
+  }
+
+  private Catalog(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    this();
+    if (extensionRegistry == null) {
+      throw new java.lang.NullPointerException();
+    }
+    com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+        com.google.protobuf.UnknownFieldSet.newBuilder();
+    try {
+      boolean done = false;
+      while (!done) {
+        int tag = input.readTag();
+        switch (tag) {
+          case 0:
+            done = true;
+            break;
+          case 10:
+            {
+              java.lang.String s = input.readStringRequireUtf8();
+
+              name_ = s;
+              break;
+            }
+          case 18:
+            {
+              java.lang.String s = input.readStringRequireUtf8();
+
+              displayName_ = s;
+              break;
+            }
+          case 34:
+            {
+              com.google.cloud.retail.v2.ProductLevelConfig.Builder subBuilder = null;
+              if (productLevelConfig_ != null) {
+                subBuilder = productLevelConfig_.toBuilder();
+              }
+              productLevelConfig_ =
+                  input.readMessage(
+                      com.google.cloud.retail.v2.ProductLevelConfig.parser(), extensionRegistry);
+              if (subBuilder != null) {
+                subBuilder.mergeFrom(productLevelConfig_);
+                productLevelConfig_ = subBuilder.buildPartial();
+              }
+
+              break;
+            }
+          default:
+            {
+              if (!parseUnknownField(input, unknownFields, extensionRegistry, tag)) {
+                done = true;
+              }
+              break;
+            }
+        }
+      }
+    } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+      throw e.setUnfinishedMessage(this);
+    } catch (java.io.IOException e) {
+      throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
+    } finally {
+      this.unknownFields = unknownFields.build();
+      makeExtensionsImmutable();
+    }
+  }
+
+  public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+    return com.google.cloud.retail.v2.CatalogProto
+        .internal_static_google_cloud_retail_v2_Catalog_descriptor;
+  }
+
+  @java.lang.Override
+  protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internalGetFieldAccessorTable() {
+    return com.google.cloud.retail.v2.CatalogProto
+        .internal_static_google_cloud_retail_v2_Catalog_fieldAccessorTable
+        .ensureFieldAccessorsInitialized(
+            com.google.cloud.retail.v2.Catalog.class,
+            com.google.cloud.retail.v2.Catalog.Builder.class);
+  }
+
+  public static final int NAME_FIELD_NUMBER = 1;
+  private volatile java.lang.Object name_;
+  /**
+   *
+   *
+   * <pre>
+   * Required. Immutable. The fully qualified resource name of the catalog.
+   * </pre>
+   *
+   * <code>
+   * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IMMUTABLE];
+   * </code>
+   *
+   * @return The name.
+   */
+  @java.lang.Override
+  public java.lang.String getName() {
+    java.lang.Object ref = name_;
+    if (ref instanceof java.lang.String) {
+      return (java.lang.String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+      java.lang.String s = bs.toStringUtf8();
+      name_ = s;
+      return s;
+    }
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Required. Immutable. The fully qualified resource name of the catalog.
+   * </pre>
+   *
+   * <code>
+   * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IMMUTABLE];
+   * </code>
+   *
+   * @return The bytes for name.
+   */
+  @java.lang.Override
+  public com.google.protobuf.ByteString getNameBytes() {
+    java.lang.Object ref = name_;
+    if (ref instanceof java.lang.String) {
+      com.google.protobuf.ByteString b =
+          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+      name_ = b;
+      return b;
+    } else {
+      return (com.google.protobuf.ByteString) ref;
+    }
+  }
+
+  public static final int DISPLAY_NAME_FIELD_NUMBER = 2;
+  private volatile java.lang.Object displayName_;
+  /**
+   *
+   *
+   * <pre>
+   * Required. Immutable. The catalog display name.
+   * This field must be a UTF-8 encoded string with a length limit of 128
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * </pre>
+   *
+   * <code>
+   * string display_name = 2 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IMMUTABLE];
+   * </code>
+   *
+   * @return The displayName.
+   */
+  @java.lang.Override
+  public java.lang.String getDisplayName() {
+    java.lang.Object ref = displayName_;
+    if (ref instanceof java.lang.String) {
+      return (java.lang.String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+      java.lang.String s = bs.toStringUtf8();
+      displayName_ = s;
+      return s;
+    }
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Required. Immutable. The catalog display name.
+   * This field must be a UTF-8 encoded string with a length limit of 128
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * </pre>
+   *
+   * <code>
+   * string display_name = 2 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IMMUTABLE];
+   * </code>
+   *
+   * @return The bytes for displayName.
+   */
+  @java.lang.Override
+  public com.google.protobuf.ByteString getDisplayNameBytes() {
+    java.lang.Object ref = displayName_;
+    if (ref instanceof java.lang.String) {
+      com.google.protobuf.ByteString b =
+          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+      displayName_ = b;
+      return b;
+    } else {
+      return (com.google.protobuf.ByteString) ref;
+    }
+  }
+
+  public static final int PRODUCT_LEVEL_CONFIG_FIELD_NUMBER = 4;
+  private com.google.cloud.retail.v2.ProductLevelConfig productLevelConfig_;
+  /**
+   *
+   *
+   * <pre>
+   * Required. The product level configuration.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.retail.v2.ProductLevelConfig product_level_config = 4 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   *
+   * @return Whether the productLevelConfig field is set.
+   */
+  @java.lang.Override
+  public boolean hasProductLevelConfig() {
+    return productLevelConfig_ != null;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Required. The product level configuration.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.retail.v2.ProductLevelConfig product_level_config = 4 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   *
+   * @return The productLevelConfig.
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.ProductLevelConfig getProductLevelConfig() {
+    return productLevelConfig_ == null
+        ? com.google.cloud.retail.v2.ProductLevelConfig.getDefaultInstance()
+        : productLevelConfig_;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Required. The product level configuration.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.retail.v2.ProductLevelConfig product_level_config = 4 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.ProductLevelConfigOrBuilder getProductLevelConfigOrBuilder() {
+    return getProductLevelConfig();
+  }
+
+  private byte memoizedIsInitialized = -1;
+
+  @java.lang.Override
+  public final boolean isInitialized() {
+    byte isInitialized = memoizedIsInitialized;
+    if (isInitialized == 1) return true;
+    if (isInitialized == 0) return false;
+
+    memoizedIsInitialized = 1;
+    return true;
+  }
+
+  @java.lang.Override
+  public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
+    if (!getNameBytes().isEmpty()) {
+      com.google.protobuf.GeneratedMessageV3.writeString(output, 1, name_);
+    }
+    if (!getDisplayNameBytes().isEmpty()) {
+      com.google.protobuf.GeneratedMessageV3.writeString(output, 2, displayName_);
+    }
+    if (productLevelConfig_ != null) {
+      output.writeMessage(4, getProductLevelConfig());
+    }
+    unknownFields.writeTo(output);
+  }
+
+  @java.lang.Override
+  public int getSerializedSize() {
+    int size = memoizedSize;
+    if (size != -1) return size;
+
+    size = 0;
+    if (!getNameBytes().isEmpty()) {
+      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(1, name_);
+    }
+    if (!getDisplayNameBytes().isEmpty()) {
+      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(2, displayName_);
+    }
+    if (productLevelConfig_ != null) {
+      size += com.google.protobuf.CodedOutputStream.computeMessageSize(4, getProductLevelConfig());
+    }
+    size += unknownFields.getSerializedSize();
+    memoizedSize = size;
+    return size;
+  }
+
+  @java.lang.Override
+  public boolean equals(final java.lang.Object obj) {
+    if (obj == this) {
+      return true;
+    }
+    if (!(obj instanceof com.google.cloud.retail.v2.Catalog)) {
+      return super.equals(obj);
+    }
+    com.google.cloud.retail.v2.Catalog other = (com.google.cloud.retail.v2.Catalog) obj;
+
+    if (!getName().equals(other.getName())) return false;
+    if (!getDisplayName().equals(other.getDisplayName())) return false;
+    if (hasProductLevelConfig() != other.hasProductLevelConfig()) return false;
+    if (hasProductLevelConfig()) {
+      if (!getProductLevelConfig().equals(other.getProductLevelConfig())) return false;
+    }
+    if (!unknownFields.equals(other.unknownFields)) return false;
+    return true;
+  }
+
+  @java.lang.Override
+  public int hashCode() {
+    if (memoizedHashCode != 0) {
+      return memoizedHashCode;
+    }
+    int hash = 41;
+    hash = (19 * hash) + getDescriptor().hashCode();
+    hash = (37 * hash) + NAME_FIELD_NUMBER;
+    hash = (53 * hash) + getName().hashCode();
+    hash = (37 * hash) + DISPLAY_NAME_FIELD_NUMBER;
+    hash = (53 * hash) + getDisplayName().hashCode();
+    if (hasProductLevelConfig()) {
+      hash = (37 * hash) + PRODUCT_LEVEL_CONFIG_FIELD_NUMBER;
+      hash = (53 * hash) + getProductLevelConfig().hashCode();
+    }
+    hash = (29 * hash) + unknownFields.hashCode();
+    memoizedHashCode = hash;
+    return hash;
+  }
+
+  public static com.google.cloud.retail.v2.Catalog parseFrom(java.nio.ByteBuffer data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.Catalog parseFrom(
+      java.nio.ByteBuffer data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.Catalog parseFrom(com.google.protobuf.ByteString data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.Catalog parseFrom(
+      com.google.protobuf.ByteString data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.Catalog parseFrom(byte[] data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.Catalog parseFrom(
+      byte[] data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.Catalog parseFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.Catalog parseFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.Catalog parseDelimitedFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.Catalog parseDelimitedFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.Catalog parseFrom(
+      com.google.protobuf.CodedInputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.Catalog parseFrom(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  @java.lang.Override
+  public Builder newBuilderForType() {
+    return newBuilder();
+  }
+
+  public static Builder newBuilder() {
+    return DEFAULT_INSTANCE.toBuilder();
+  }
+
+  public static Builder newBuilder(com.google.cloud.retail.v2.Catalog prototype) {
+    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+  }
+
+  @java.lang.Override
+  public Builder toBuilder() {
+    return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
+  }
+
+  @java.lang.Override
+  protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+    Builder builder = new Builder(parent);
+    return builder;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * The catalog configuration.
+   * </pre>
+   *
+   * Protobuf type {@code google.cloud.retail.v2.Catalog}
+   */
+  public static final class Builder extends com.google.protobuf.GeneratedMessageV3.Builder<Builder>
+      implements
+      // @@protoc_insertion_point(builder_implements:google.cloud.retail.v2.Catalog)
+      com.google.cloud.retail.v2.CatalogOrBuilder {
+    public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+      return com.google.cloud.retail.v2.CatalogProto
+          .internal_static_google_cloud_retail_v2_Catalog_descriptor;
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return com.google.cloud.retail.v2.CatalogProto
+          .internal_static_google_cloud_retail_v2_Catalog_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              com.google.cloud.retail.v2.Catalog.class,
+              com.google.cloud.retail.v2.Catalog.Builder.class);
+    }
+
+    // Construct using com.google.cloud.retail.v2.Catalog.newBuilder()
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
+
+    private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+      super(parent);
+      maybeForceBuilderInitialization();
+    }
+
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders) {}
+    }
+
+    @java.lang.Override
+    public Builder clear() {
+      super.clear();
+      name_ = "";
+
+      displayName_ = "";
+
+      if (productLevelConfigBuilder_ == null) {
+        productLevelConfig_ = null;
+      } else {
+        productLevelConfig_ = null;
+        productLevelConfigBuilder_ = null;
+      }
+      return this;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
+      return com.google.cloud.retail.v2.CatalogProto
+          .internal_static_google_cloud_retail_v2_Catalog_descriptor;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.Catalog getDefaultInstanceForType() {
+      return com.google.cloud.retail.v2.Catalog.getDefaultInstance();
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.Catalog build() {
+      com.google.cloud.retail.v2.Catalog result = buildPartial();
+      if (!result.isInitialized()) {
+        throw newUninitializedMessageException(result);
+      }
+      return result;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.Catalog buildPartial() {
+      com.google.cloud.retail.v2.Catalog result = new com.google.cloud.retail.v2.Catalog(this);
+      result.name_ = name_;
+      result.displayName_ = displayName_;
+      if (productLevelConfigBuilder_ == null) {
+        result.productLevelConfig_ = productLevelConfig_;
+      } else {
+        result.productLevelConfig_ = productLevelConfigBuilder_.build();
+      }
+      onBuilt();
+      return result;
+    }
+
+    @java.lang.Override
+    public Builder clone() {
+      return super.clone();
+    }
+
+    @java.lang.Override
+    public Builder setField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.setField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
+      return super.clearField(field);
+    }
+
+    @java.lang.Override
+    public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+      return super.clearOneof(oneof);
+    }
+
+    @java.lang.Override
+    public Builder setRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, int index, java.lang.Object value) {
+      return super.setRepeatedField(field, index, value);
+    }
+
+    @java.lang.Override
+    public Builder addRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.addRepeatedField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(com.google.protobuf.Message other) {
+      if (other instanceof com.google.cloud.retail.v2.Catalog) {
+        return mergeFrom((com.google.cloud.retail.v2.Catalog) other);
+      } else {
+        super.mergeFrom(other);
+        return this;
+      }
+    }
+
+    public Builder mergeFrom(com.google.cloud.retail.v2.Catalog other) {
+      if (other == com.google.cloud.retail.v2.Catalog.getDefaultInstance()) return this;
+      if (!other.getName().isEmpty()) {
+        name_ = other.name_;
+        onChanged();
+      }
+      if (!other.getDisplayName().isEmpty()) {
+        displayName_ = other.displayName_;
+        onChanged();
+      }
+      if (other.hasProductLevelConfig()) {
+        mergeProductLevelConfig(other.getProductLevelConfig());
+      }
+      this.mergeUnknownFields(other.unknownFields);
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final boolean isInitialized() {
+      return true;
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      com.google.cloud.retail.v2.Catalog parsedMessage = null;
+      try {
+        parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        parsedMessage = (com.google.cloud.retail.v2.Catalog) e.getUnfinishedMessage();
+        throw e.unwrapIOException();
+      } finally {
+        if (parsedMessage != null) {
+          mergeFrom(parsedMessage);
+        }
+      }
+      return this;
+    }
+
+    private java.lang.Object name_ = "";
+    /**
+     *
+     *
+     * <pre>
+     * Required. Immutable. The fully qualified resource name of the catalog.
+     * </pre>
+     *
+     * <code>
+     * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IMMUTABLE];
+     * </code>
+     *
+     * @return The name.
+     */
+    public java.lang.String getName() {
+      java.lang.Object ref = name_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        name_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. Immutable. The fully qualified resource name of the catalog.
+     * </pre>
+     *
+     * <code>
+     * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IMMUTABLE];
+     * </code>
+     *
+     * @return The bytes for name.
+     */
+    public com.google.protobuf.ByteString getNameBytes() {
+      java.lang.Object ref = name_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b =
+            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+        name_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. Immutable. The fully qualified resource name of the catalog.
+     * </pre>
+     *
+     * <code>
+     * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IMMUTABLE];
+     * </code>
+     *
+     * @param value The name to set.
+     * @return This builder for chaining.
+     */
+    public Builder setName(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+
+      name_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. Immutable. The fully qualified resource name of the catalog.
+     * </pre>
+     *
+     * <code>
+     * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IMMUTABLE];
+     * </code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearName() {
+
+      name_ = getDefaultInstance().getName();
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. Immutable. The fully qualified resource name of the catalog.
+     * </pre>
+     *
+     * <code>
+     * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IMMUTABLE];
+     * </code>
+     *
+     * @param value The bytes for name to set.
+     * @return This builder for chaining.
+     */
+    public Builder setNameBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+
+      name_ = value;
+      onChanged();
+      return this;
+    }
+
+    private java.lang.Object displayName_ = "";
+    /**
+     *
+     *
+     * <pre>
+     * Required. Immutable. The catalog display name.
+     * This field must be a UTF-8 encoded string with a length limit of 128
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>
+     * string display_name = 2 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IMMUTABLE];
+     * </code>
+     *
+     * @return The displayName.
+     */
+    public java.lang.String getDisplayName() {
+      java.lang.Object ref = displayName_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        displayName_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. Immutable. The catalog display name.
+     * This field must be a UTF-8 encoded string with a length limit of 128
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>
+     * string display_name = 2 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IMMUTABLE];
+     * </code>
+     *
+     * @return The bytes for displayName.
+     */
+    public com.google.protobuf.ByteString getDisplayNameBytes() {
+      java.lang.Object ref = displayName_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b =
+            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+        displayName_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. Immutable. The catalog display name.
+     * This field must be a UTF-8 encoded string with a length limit of 128
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>
+     * string display_name = 2 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IMMUTABLE];
+     * </code>
+     *
+     * @param value The displayName to set.
+     * @return This builder for chaining.
+     */
+    public Builder setDisplayName(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+
+      displayName_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. Immutable. The catalog display name.
+     * This field must be a UTF-8 encoded string with a length limit of 128
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>
+     * string display_name = 2 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IMMUTABLE];
+     * </code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearDisplayName() {
+
+      displayName_ = getDefaultInstance().getDisplayName();
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. Immutable. The catalog display name.
+     * This field must be a UTF-8 encoded string with a length limit of 128
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>
+     * string display_name = 2 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IMMUTABLE];
+     * </code>
+     *
+     * @param value The bytes for displayName to set.
+     * @return This builder for chaining.
+     */
+    public Builder setDisplayNameBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+
+      displayName_ = value;
+      onChanged();
+      return this;
+    }
+
+    private com.google.cloud.retail.v2.ProductLevelConfig productLevelConfig_;
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.cloud.retail.v2.ProductLevelConfig,
+            com.google.cloud.retail.v2.ProductLevelConfig.Builder,
+            com.google.cloud.retail.v2.ProductLevelConfigOrBuilder>
+        productLevelConfigBuilder_;
+    /**
+     *
+     *
+     * <pre>
+     * Required. The product level configuration.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.ProductLevelConfig product_level_config = 4 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     *
+     * @return Whether the productLevelConfig field is set.
+     */
+    public boolean hasProductLevelConfig() {
+      return productLevelConfigBuilder_ != null || productLevelConfig_ != null;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The product level configuration.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.ProductLevelConfig product_level_config = 4 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     *
+     * @return The productLevelConfig.
+     */
+    public com.google.cloud.retail.v2.ProductLevelConfig getProductLevelConfig() {
+      if (productLevelConfigBuilder_ == null) {
+        return productLevelConfig_ == null
+            ? com.google.cloud.retail.v2.ProductLevelConfig.getDefaultInstance()
+            : productLevelConfig_;
+      } else {
+        return productLevelConfigBuilder_.getMessage();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The product level configuration.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.ProductLevelConfig product_level_config = 4 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder setProductLevelConfig(com.google.cloud.retail.v2.ProductLevelConfig value) {
+      if (productLevelConfigBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        productLevelConfig_ = value;
+        onChanged();
+      } else {
+        productLevelConfigBuilder_.setMessage(value);
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The product level configuration.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.ProductLevelConfig product_level_config = 4 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder setProductLevelConfig(
+        com.google.cloud.retail.v2.ProductLevelConfig.Builder builderForValue) {
+      if (productLevelConfigBuilder_ == null) {
+        productLevelConfig_ = builderForValue.build();
+        onChanged();
+      } else {
+        productLevelConfigBuilder_.setMessage(builderForValue.build());
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The product level configuration.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.ProductLevelConfig product_level_config = 4 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder mergeProductLevelConfig(com.google.cloud.retail.v2.ProductLevelConfig value) {
+      if (productLevelConfigBuilder_ == null) {
+        if (productLevelConfig_ != null) {
+          productLevelConfig_ =
+              com.google.cloud.retail.v2.ProductLevelConfig.newBuilder(productLevelConfig_)
+                  .mergeFrom(value)
+                  .buildPartial();
+        } else {
+          productLevelConfig_ = value;
+        }
+        onChanged();
+      } else {
+        productLevelConfigBuilder_.mergeFrom(value);
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The product level configuration.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.ProductLevelConfig product_level_config = 4 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder clearProductLevelConfig() {
+      if (productLevelConfigBuilder_ == null) {
+        productLevelConfig_ = null;
+        onChanged();
+      } else {
+        productLevelConfig_ = null;
+        productLevelConfigBuilder_ = null;
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The product level configuration.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.ProductLevelConfig product_level_config = 4 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public com.google.cloud.retail.v2.ProductLevelConfig.Builder getProductLevelConfigBuilder() {
+
+      onChanged();
+      return getProductLevelConfigFieldBuilder().getBuilder();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The product level configuration.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.ProductLevelConfig product_level_config = 4 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public com.google.cloud.retail.v2.ProductLevelConfigOrBuilder getProductLevelConfigOrBuilder() {
+      if (productLevelConfigBuilder_ != null) {
+        return productLevelConfigBuilder_.getMessageOrBuilder();
+      } else {
+        return productLevelConfig_ == null
+            ? com.google.cloud.retail.v2.ProductLevelConfig.getDefaultInstance()
+            : productLevelConfig_;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The product level configuration.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.ProductLevelConfig product_level_config = 4 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.cloud.retail.v2.ProductLevelConfig,
+            com.google.cloud.retail.v2.ProductLevelConfig.Builder,
+            com.google.cloud.retail.v2.ProductLevelConfigOrBuilder>
+        getProductLevelConfigFieldBuilder() {
+      if (productLevelConfigBuilder_ == null) {
+        productLevelConfigBuilder_ =
+            new com.google.protobuf.SingleFieldBuilderV3<
+                com.google.cloud.retail.v2.ProductLevelConfig,
+                com.google.cloud.retail.v2.ProductLevelConfig.Builder,
+                com.google.cloud.retail.v2.ProductLevelConfigOrBuilder>(
+                getProductLevelConfig(), getParentForChildren(), isClean());
+        productLevelConfig_ = null;
+      }
+      return productLevelConfigBuilder_;
+    }
+
+    @java.lang.Override
+    public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.setUnknownFields(unknownFields);
+    }
+
+    @java.lang.Override
+    public final Builder mergeUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.mergeUnknownFields(unknownFields);
+    }
+
+    // @@protoc_insertion_point(builder_scope:google.cloud.retail.v2.Catalog)
+  }
+
+  // @@protoc_insertion_point(class_scope:google.cloud.retail.v2.Catalog)
+  private static final com.google.cloud.retail.v2.Catalog DEFAULT_INSTANCE;
+
+  static {
+    DEFAULT_INSTANCE = new com.google.cloud.retail.v2.Catalog();
+  }
+
+  public static com.google.cloud.retail.v2.Catalog getDefaultInstance() {
+    return DEFAULT_INSTANCE;
+  }
+
+  private static final com.google.protobuf.Parser<Catalog> PARSER =
+      new com.google.protobuf.AbstractParser<Catalog>() {
+        @java.lang.Override
+        public Catalog parsePartialFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws com.google.protobuf.InvalidProtocolBufferException {
+          return new Catalog(input, extensionRegistry);
+        }
+      };
+
+  public static com.google.protobuf.Parser<Catalog> parser() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.protobuf.Parser<Catalog> getParserForType() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.cloud.retail.v2.Catalog getDefaultInstanceForType() {
+    return DEFAULT_INSTANCE;
+  }
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/CatalogOrBuilder.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/CatalogOrBuilder.java
new file mode 100644
index 00000000..e1fb6ff1
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/CatalogOrBuilder.java
@@ -0,0 +1,128 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/catalog.proto
+
+package com.google.cloud.retail.v2;
+
+public interface CatalogOrBuilder
+    extends
+    // @@protoc_insertion_point(interface_extends:google.cloud.retail.v2.Catalog)
+    com.google.protobuf.MessageOrBuilder {
+
+  /**
+   *
+   *
+   * <pre>
+   * Required. Immutable. The fully qualified resource name of the catalog.
+   * </pre>
+   *
+   * <code>
+   * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IMMUTABLE];
+   * </code>
+   *
+   * @return The name.
+   */
+  java.lang.String getName();
+  /**
+   *
+   *
+   * <pre>
+   * Required. Immutable. The fully qualified resource name of the catalog.
+   * </pre>
+   *
+   * <code>
+   * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IMMUTABLE];
+   * </code>
+   *
+   * @return The bytes for name.
+   */
+  com.google.protobuf.ByteString getNameBytes();
+
+  /**
+   *
+   *
+   * <pre>
+   * Required. Immutable. The catalog display name.
+   * This field must be a UTF-8 encoded string with a length limit of 128
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * </pre>
+   *
+   * <code>
+   * string display_name = 2 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IMMUTABLE];
+   * </code>
+   *
+   * @return The displayName.
+   */
+  java.lang.String getDisplayName();
+  /**
+   *
+   *
+   * <pre>
+   * Required. Immutable. The catalog display name.
+   * This field must be a UTF-8 encoded string with a length limit of 128
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * </pre>
+   *
+   * <code>
+   * string display_name = 2 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IMMUTABLE];
+   * </code>
+   *
+   * @return The bytes for displayName.
+   */
+  com.google.protobuf.ByteString getDisplayNameBytes();
+
+  /**
+   *
+   *
+   * <pre>
+   * Required. The product level configuration.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.retail.v2.ProductLevelConfig product_level_config = 4 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   *
+   * @return Whether the productLevelConfig field is set.
+   */
+  boolean hasProductLevelConfig();
+  /**
+   *
+   *
+   * <pre>
+   * Required. The product level configuration.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.retail.v2.ProductLevelConfig product_level_config = 4 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   *
+   * @return The productLevelConfig.
+   */
+  com.google.cloud.retail.v2.ProductLevelConfig getProductLevelConfig();
+  /**
+   *
+   *
+   * <pre>
+   * Required. The product level configuration.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.retail.v2.ProductLevelConfig product_level_config = 4 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   */
+  com.google.cloud.retail.v2.ProductLevelConfigOrBuilder getProductLevelConfigOrBuilder();
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/CatalogProto.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/CatalogProto.java
new file mode 100644
index 00000000..92a1c3fb
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/CatalogProto.java
@@ -0,0 +1,102 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/catalog.proto
+
+package com.google.cloud.retail.v2;
+
+public final class CatalogProto {
+  private CatalogProto() {}
+
+  public static void registerAllExtensions(com.google.protobuf.ExtensionRegistryLite registry) {}
+
+  public static void registerAllExtensions(com.google.protobuf.ExtensionRegistry registry) {
+    registerAllExtensions((com.google.protobuf.ExtensionRegistryLite) registry);
+  }
+
+  static final com.google.protobuf.Descriptors.Descriptor
+      internal_static_google_cloud_retail_v2_ProductLevelConfig_descriptor;
+  static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_google_cloud_retail_v2_ProductLevelConfig_fieldAccessorTable;
+  static final com.google.protobuf.Descriptors.Descriptor
+      internal_static_google_cloud_retail_v2_Catalog_descriptor;
+  static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_google_cloud_retail_v2_Catalog_fieldAccessorTable;
+
+  public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
+    return descriptor;
+  }
+
+  private static com.google.protobuf.Descriptors.FileDescriptor descriptor;
+
+  static {
+    java.lang.String[] descriptorData = {
+      "\n$google/cloud/retail/v2/catalog.proto\022\026"
+          + "google.cloud.retail.v2\032\034google/api/annot"
+          + "ations.proto\032\037google/api/field_behavior."
+          + "proto\032\031google/api/resource.proto\"^\n\022Prod"
+          + "uctLevelConfig\022\036\n\026ingestion_product_type"
+          + "\030\001 \001(\t\022(\n merchant_center_product_id_fie"
+          + "ld\030\002 \001(\t\"\354\001\n\007Catalog\022\024\n\004name\030\001 \001(\tB\006\340A\002\340"
+          + "A\005\022\034\n\014display_name\030\002 \001(\tB\006\340A\002\340A\005\022M\n\024prod"
+          + "uct_level_config\030\004 \001(\0132*.google.cloud.re"
+          + "tail.v2.ProductLevelConfigB\003\340A\002:^\352A[\n\035re"
+          + "tail.googleapis.com/Catalog\022:projects/{p"
+          + "roject}/locations/{location}/catalogs/{c"
+          + "atalog}B\301\001\n\032com.google.cloud.retail.v2B\014"
+          + "CatalogProtoP\001Z<google.golang.org/genpro"
+          + "to/googleapis/cloud/retail/v2;retail\242\002\006R"
+          + "ETAIL\252\002\026Google.Cloud.Retail.V2\312\002\026Google\\"
+          + "Cloud\\Retail\\V2\352\002\031Google::Cloud::Retail:"
+          + ":V2b\006proto3"
+    };
+    descriptor =
+        com.google.protobuf.Descriptors.FileDescriptor.internalBuildGeneratedFileFrom(
+            descriptorData,
+            new com.google.protobuf.Descriptors.FileDescriptor[] {
+              com.google.api.AnnotationsProto.getDescriptor(),
+              com.google.api.FieldBehaviorProto.getDescriptor(),
+              com.google.api.ResourceProto.getDescriptor(),
+            });
+    internal_static_google_cloud_retail_v2_ProductLevelConfig_descriptor =
+        getDescriptor().getMessageTypes().get(0);
+    internal_static_google_cloud_retail_v2_ProductLevelConfig_fieldAccessorTable =
+        new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+            internal_static_google_cloud_retail_v2_ProductLevelConfig_descriptor,
+            new java.lang.String[] {
+              "IngestionProductType", "MerchantCenterProductIdField",
+            });
+    internal_static_google_cloud_retail_v2_Catalog_descriptor =
+        getDescriptor().getMessageTypes().get(1);
+    internal_static_google_cloud_retail_v2_Catalog_fieldAccessorTable =
+        new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+            internal_static_google_cloud_retail_v2_Catalog_descriptor,
+            new java.lang.String[] {
+              "Name", "DisplayName", "ProductLevelConfig",
+            });
+    com.google.protobuf.ExtensionRegistry registry =
+        com.google.protobuf.ExtensionRegistry.newInstance();
+    registry.add(com.google.api.FieldBehaviorProto.fieldBehavior);
+    registry.add(com.google.api.ResourceProto.resource);
+    com.google.protobuf.Descriptors.FileDescriptor.internalUpdateFileDescriptor(
+        descriptor, registry);
+    com.google.api.AnnotationsProto.getDescriptor();
+    com.google.api.FieldBehaviorProto.getDescriptor();
+    com.google.api.ResourceProto.getDescriptor();
+  }
+
+  // @@protoc_insertion_point(outer_class_scope)
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/CatalogServiceProto.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/CatalogServiceProto.java
new file mode 100644
index 00000000..b3c73444
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/CatalogServiceProto.java
@@ -0,0 +1,144 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/catalog_service.proto
+
+package com.google.cloud.retail.v2;
+
+public final class CatalogServiceProto {
+  private CatalogServiceProto() {}
+
+  public static void registerAllExtensions(com.google.protobuf.ExtensionRegistryLite registry) {}
+
+  public static void registerAllExtensions(com.google.protobuf.ExtensionRegistry registry) {
+    registerAllExtensions((com.google.protobuf.ExtensionRegistryLite) registry);
+  }
+
+  static final com.google.protobuf.Descriptors.Descriptor
+      internal_static_google_cloud_retail_v2_ListCatalogsRequest_descriptor;
+  static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_google_cloud_retail_v2_ListCatalogsRequest_fieldAccessorTable;
+  static final com.google.protobuf.Descriptors.Descriptor
+      internal_static_google_cloud_retail_v2_ListCatalogsResponse_descriptor;
+  static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_google_cloud_retail_v2_ListCatalogsResponse_fieldAccessorTable;
+  static final com.google.protobuf.Descriptors.Descriptor
+      internal_static_google_cloud_retail_v2_UpdateCatalogRequest_descriptor;
+  static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_google_cloud_retail_v2_UpdateCatalogRequest_fieldAccessorTable;
+
+  public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
+    return descriptor;
+  }
+
+  private static com.google.protobuf.Descriptors.FileDescriptor descriptor;
+
+  static {
+    java.lang.String[] descriptorData = {
+      "\n,google/cloud/retail/v2/catalog_service"
+          + ".proto\022\026google.cloud.retail.v2\032\034google/a"
+          + "pi/annotations.proto\032\027google/api/client."
+          + "proto\032\037google/api/field_behavior.proto\032\031"
+          + "google/api/resource.proto\032$google/cloud/"
+          + "retail/v2/catalog.proto\032\033google/protobuf"
+          + "/empty.proto\032 google/protobuf/field_mask"
+          + ".proto\032\037google/protobuf/timestamp.proto\""
+          + "w\n\023ListCatalogsRequest\0229\n\006parent\030\001 \001(\tB)"
+          + "\340A\002\372A#\n!locations.googleapis.com/Locatio"
+          + "n\022\021\n\tpage_size\030\002 \001(\005\022\022\n\npage_token\030\003 \001(\t"
+          + "\"b\n\024ListCatalogsResponse\0221\n\010catalogs\030\001 \003"
+          + "(\0132\037.google.cloud.retail.v2.Catalog\022\027\n\017n"
+          + "ext_page_token\030\002 \001(\t\"~\n\024UpdateCatalogReq"
+          + "uest\0225\n\007catalog\030\001 \001(\0132\037.google.cloud.ret"
+          + "ail.v2.CatalogB\003\340A\002\022/\n\013update_mask\030\002 \001(\013"
+          + "2\032.google.protobuf.FieldMask2\304\003\n\016Catalog"
+          + "Service\022\250\001\n\014ListCatalogs\022+.google.cloud."
+          + "retail.v2.ListCatalogsRequest\032,.google.c"
+          + "loud.retail.v2.ListCatalogsResponse\"=\202\323\344"
+          + "\223\002.\022,/v2/{parent=projects/*/locations/*}"
+          + "/catalogs\332A\006parent\022\273\001\n\rUpdateCatalog\022,.g"
+          + "oogle.cloud.retail.v2.UpdateCatalogReque"
+          + "st\032\037.google.cloud.retail.v2.Catalog\"[\202\323\344"
+          + "\223\002?24/v2/{catalog.name=projects/*/locati"
+          + "ons/*/catalogs/*}:\007catalog\332A\023catalog,upd"
+          + "ate_mask\032I\312A\025retail.googleapis.com\322A.htt"
+          + "ps://www.googleapis.com/auth/cloud-platf"
+          + "ormB\310\001\n\032com.google.cloud.retail.v2B\023Cata"
+          + "logServiceProtoP\001Z<google.golang.org/gen"
+          + "proto/googleapis/cloud/retail/v2;retail\242"
+          + "\002\006RETAIL\252\002\026Google.Cloud.Retail.V2\312\002\026Goog"
+          + "le\\Cloud\\Retail\\V2\352\002\031Google::Cloud::Reta"
+          + "il::V2b\006proto3"
+    };
+    descriptor =
+        com.google.protobuf.Descriptors.FileDescriptor.internalBuildGeneratedFileFrom(
+            descriptorData,
+            new com.google.protobuf.Descriptors.FileDescriptor[] {
+              com.google.api.AnnotationsProto.getDescriptor(),
+              com.google.api.ClientProto.getDescriptor(),
+              com.google.api.FieldBehaviorProto.getDescriptor(),
+              com.google.api.ResourceProto.getDescriptor(),
+              com.google.cloud.retail.v2.CatalogProto.getDescriptor(),
+              com.google.protobuf.EmptyProto.getDescriptor(),
+              com.google.protobuf.FieldMaskProto.getDescriptor(),
+              com.google.protobuf.TimestampProto.getDescriptor(),
+            });
+    internal_static_google_cloud_retail_v2_ListCatalogsRequest_descriptor =
+        getDescriptor().getMessageTypes().get(0);
+    internal_static_google_cloud_retail_v2_ListCatalogsRequest_fieldAccessorTable =
+        new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+            internal_static_google_cloud_retail_v2_ListCatalogsRequest_descriptor,
+            new java.lang.String[] {
+              "Parent", "PageSize", "PageToken",
+            });
+    internal_static_google_cloud_retail_v2_ListCatalogsResponse_descriptor =
+        getDescriptor().getMessageTypes().get(1);
+    internal_static_google_cloud_retail_v2_ListCatalogsResponse_fieldAccessorTable =
+        new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+            internal_static_google_cloud_retail_v2_ListCatalogsResponse_descriptor,
+            new java.lang.String[] {
+              "Catalogs", "NextPageToken",
+            });
+    internal_static_google_cloud_retail_v2_UpdateCatalogRequest_descriptor =
+        getDescriptor().getMessageTypes().get(2);
+    internal_static_google_cloud_retail_v2_UpdateCatalogRequest_fieldAccessorTable =
+        new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+            internal_static_google_cloud_retail_v2_UpdateCatalogRequest_descriptor,
+            new java.lang.String[] {
+              "Catalog", "UpdateMask",
+            });
+    com.google.protobuf.ExtensionRegistry registry =
+        com.google.protobuf.ExtensionRegistry.newInstance();
+    registry.add(com.google.api.ClientProto.defaultHost);
+    registry.add(com.google.api.FieldBehaviorProto.fieldBehavior);
+    registry.add(com.google.api.AnnotationsProto.http);
+    registry.add(com.google.api.ClientProto.methodSignature);
+    registry.add(com.google.api.ClientProto.oauthScopes);
+    registry.add(com.google.api.ResourceProto.resourceReference);
+    com.google.protobuf.Descriptors.FileDescriptor.internalUpdateFileDescriptor(
+        descriptor, registry);
+    com.google.api.AnnotationsProto.getDescriptor();
+    com.google.api.ClientProto.getDescriptor();
+    com.google.api.FieldBehaviorProto.getDescriptor();
+    com.google.api.ResourceProto.getDescriptor();
+    com.google.cloud.retail.v2.CatalogProto.getDescriptor();
+    com.google.protobuf.EmptyProto.getDescriptor();
+    com.google.protobuf.FieldMaskProto.getDescriptor();
+    com.google.protobuf.TimestampProto.getDescriptor();
+  }
+
+  // @@protoc_insertion_point(outer_class_scope)
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/CollectUserEventRequest.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/CollectUserEventRequest.java
new file mode 100644
index 00000000..47f4a2fc
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/CollectUserEventRequest.java
@@ -0,0 +1,1127 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/user_event_service.proto
+
+package com.google.cloud.retail.v2;
+
+/**
+ *
+ *
+ * <pre>
+ * Request message for CollectUserEvent method.
+ * </pre>
+ *
+ * Protobuf type {@code google.cloud.retail.v2.CollectUserEventRequest}
+ */
+public final class CollectUserEventRequest extends com.google.protobuf.GeneratedMessageV3
+    implements
+    // @@protoc_insertion_point(message_implements:google.cloud.retail.v2.CollectUserEventRequest)
+    CollectUserEventRequestOrBuilder {
+  private static final long serialVersionUID = 0L;
+  // Use CollectUserEventRequest.newBuilder() to construct.
+  private CollectUserEventRequest(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+    super(builder);
+  }
+
+  private CollectUserEventRequest() {
+    parent_ = "";
+    userEvent_ = "";
+    uri_ = "";
+  }
+
+  @java.lang.Override
+  @SuppressWarnings({"unused"})
+  protected java.lang.Object newInstance(UnusedPrivateParameter unused) {
+    return new CollectUserEventRequest();
+  }
+
+  @java.lang.Override
+  public final com.google.protobuf.UnknownFieldSet getUnknownFields() {
+    return this.unknownFields;
+  }
+
+  private CollectUserEventRequest(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    this();
+    if (extensionRegistry == null) {
+      throw new java.lang.NullPointerException();
+    }
+    com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+        com.google.protobuf.UnknownFieldSet.newBuilder();
+    try {
+      boolean done = false;
+      while (!done) {
+        int tag = input.readTag();
+        switch (tag) {
+          case 0:
+            done = true;
+            break;
+          case 10:
+            {
+              java.lang.String s = input.readStringRequireUtf8();
+
+              parent_ = s;
+              break;
+            }
+          case 18:
+            {
+              java.lang.String s = input.readStringRequireUtf8();
+
+              userEvent_ = s;
+              break;
+            }
+          case 26:
+            {
+              java.lang.String s = input.readStringRequireUtf8();
+
+              uri_ = s;
+              break;
+            }
+          case 32:
+            {
+              ets_ = input.readInt64();
+              break;
+            }
+          default:
+            {
+              if (!parseUnknownField(input, unknownFields, extensionRegistry, tag)) {
+                done = true;
+              }
+              break;
+            }
+        }
+      }
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+   * <pre>
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+   * <code>string user_event = 2 [(.google.api.field_behavior) = REQUIRED];</code>
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+  @java.lang.Override
+  public boolean equals(final java.lang.Object obj) {
+    if (obj == this) {
+      return true;
+    }
+    if (!(obj instanceof com.google.cloud.retail.v2.CollectUserEventRequest)) {
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+    if (!getParent().equals(other.getParent())) return false;
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+    if (!getUri().equals(other.getUri())) return false;
+    if (getEts() != other.getEts()) return false;
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+    return true;
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+  public int hashCode() {
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+    int hash = 41;
+    hash = (19 * hash) + getDescriptor().hashCode();
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+  public static com.google.cloud.retail.v2.CollectUserEventRequest parseFrom(
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+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
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+      com.google.protobuf.ByteString data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
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+
+  public static com.google.cloud.retail.v2.CollectUserEventRequest parseFrom(
+      com.google.protobuf.ByteString data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
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+  public static com.google.cloud.retail.v2.CollectUserEventRequest parseFrom(byte[] data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.CollectUserEventRequest parseFrom(
+      byte[] data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.CollectUserEventRequest parseFrom(
+      java.io.InputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
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+  public static com.google.cloud.retail.v2.CollectUserEventRequest parseFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
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+  public static com.google.cloud.retail.v2.CollectUserEventRequest parseDelimitedFrom(
+      java.io.InputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(PARSER, input);
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+
+  public static com.google.cloud.retail.v2.CollectUserEventRequest parseDelimitedFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.CollectUserEventRequest parseFrom(
+      com.google.protobuf.CodedInputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.CollectUserEventRequest parseFrom(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  @java.lang.Override
+  public Builder newBuilderForType() {
+    return newBuilder();
+  }
+
+  public static Builder newBuilder() {
+    return DEFAULT_INSTANCE.toBuilder();
+  }
+
+  public static Builder newBuilder(com.google.cloud.retail.v2.CollectUserEventRequest prototype) {
+    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+  }
+
+  @java.lang.Override
+  public Builder toBuilder() {
+    return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
+  }
+
+  @java.lang.Override
+  protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+    Builder builder = new Builder(parent);
+    return builder;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Request message for CollectUserEvent method.
+   * </pre>
+   *
+   * Protobuf type {@code google.cloud.retail.v2.CollectUserEventRequest}
+   */
+  public static final class Builder extends com.google.protobuf.GeneratedMessageV3.Builder<Builder>
+      implements
+      // @@protoc_insertion_point(builder_implements:google.cloud.retail.v2.CollectUserEventRequest)
+      com.google.cloud.retail.v2.CollectUserEventRequestOrBuilder {
+    public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+      return com.google.cloud.retail.v2.UserEventServiceProto
+          .internal_static_google_cloud_retail_v2_CollectUserEventRequest_descriptor;
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return com.google.cloud.retail.v2.UserEventServiceProto
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+          .ensureFieldAccessorsInitialized(
+              com.google.cloud.retail.v2.CollectUserEventRequest.class,
+              com.google.cloud.retail.v2.CollectUserEventRequest.Builder.class);
+    }
+
+    // Construct using com.google.cloud.retail.v2.CollectUserEventRequest.newBuilder()
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
+
+    private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+      super(parent);
+      maybeForceBuilderInitialization();
+    }
+
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders) {}
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+    @java.lang.Override
+    public Builder clear() {
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+      parent_ = "";
+
+      userEvent_ = "";
+
+      uri_ = "";
+
+      ets_ = 0L;
+
+      return this;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
+      return com.google.cloud.retail.v2.UserEventServiceProto
+          .internal_static_google_cloud_retail_v2_CollectUserEventRequest_descriptor;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.CollectUserEventRequest getDefaultInstanceForType() {
+      return com.google.cloud.retail.v2.CollectUserEventRequest.getDefaultInstance();
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.CollectUserEventRequest build() {
+      com.google.cloud.retail.v2.CollectUserEventRequest result = buildPartial();
+      if (!result.isInitialized()) {
+        throw newUninitializedMessageException(result);
+      }
+      return result;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.CollectUserEventRequest buildPartial() {
+      com.google.cloud.retail.v2.CollectUserEventRequest result =
+          new com.google.cloud.retail.v2.CollectUserEventRequest(this);
+      result.parent_ = parent_;
+      result.userEvent_ = userEvent_;
+      result.uri_ = uri_;
+      result.ets_ = ets_;
+      onBuilt();
+      return result;
+    }
+
+    @java.lang.Override
+    public Builder clone() {
+      return super.clone();
+    }
+
+    @java.lang.Override
+    public Builder setField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.setField(field, value);
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+    @java.lang.Override
+    public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
+      return super.clearField(field);
+    }
+
+    @java.lang.Override
+    public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+      return super.clearOneof(oneof);
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+    @java.lang.Override
+    public Builder setRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, int index, java.lang.Object value) {
+      return super.setRepeatedField(field, index, value);
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+    @java.lang.Override
+    public Builder addRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.addRepeatedField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(com.google.protobuf.Message other) {
+      if (other instanceof com.google.cloud.retail.v2.CollectUserEventRequest) {
+        return mergeFrom((com.google.cloud.retail.v2.CollectUserEventRequest) other);
+      } else {
+        super.mergeFrom(other);
+        return this;
+      }
+    }
+
+    public Builder mergeFrom(com.google.cloud.retail.v2.CollectUserEventRequest other) {
+      if (other == com.google.cloud.retail.v2.CollectUserEventRequest.getDefaultInstance())
+        return this;
+      if (!other.getParent().isEmpty()) {
+        parent_ = other.parent_;
+        onChanged();
+      }
+      if (!other.getUserEvent().isEmpty()) {
+        userEvent_ = other.userEvent_;
+        onChanged();
+      }
+      if (!other.getUri().isEmpty()) {
+        uri_ = other.uri_;
+        onChanged();
+      }
+      if (other.getEts() != 0L) {
+        setEts(other.getEts());
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+      this.mergeUnknownFields(other.unknownFields);
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final boolean isInitialized() {
+      return true;
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      com.google.cloud.retail.v2.CollectUserEventRequest parsedMessage = null;
+      try {
+        parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        parsedMessage =
+            (com.google.cloud.retail.v2.CollectUserEventRequest) e.getUnfinishedMessage();
+        throw e.unwrapIOException();
+      } finally {
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+          mergeFrom(parsedMessage);
+        }
+      }
+      return this;
+    }
+
+    private java.lang.Object parent_ = "";
+    /**
+     *
+     *
+     * <pre>
+     * Required. The parent catalog name, such as
+     * "projects/1234/locations/global/catalogs/default_catalog".
+     * </pre>
+     *
+     * <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @return The parent.
+     */
+    public java.lang.String getParent() {
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+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        parent_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The parent catalog name, such as
+     * "projects/1234/locations/global/catalogs/default_catalog".
+     * </pre>
+     *
+     * <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @return The bytes for parent.
+     */
+    public com.google.protobuf.ByteString getParentBytes() {
+      java.lang.Object ref = parent_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b =
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+        parent_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The parent catalog name, such as
+     * "projects/1234/locations/global/catalogs/default_catalog".
+     * </pre>
+     *
+     * <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @param value The parent to set.
+     * @return This builder for chaining.
+     */
+    public Builder setParent(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+
+      parent_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The parent catalog name, such as
+     * "projects/1234/locations/global/catalogs/default_catalog".
+     * </pre>
+     *
+     * <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearParent() {
+
+      parent_ = getDefaultInstance().getParent();
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The parent catalog name, such as
+     * "projects/1234/locations/global/catalogs/default_catalog".
+     * </pre>
+     *
+     * <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @param value The bytes for parent to set.
+     * @return This builder for chaining.
+     */
+    public Builder setParentBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+
+      parent_ = value;
+      onChanged();
+      return this;
+    }
+
+    private java.lang.Object userEvent_ = "";
+    /**
+     *
+     *
+     * <pre>
+     * Required. URL encoded UserEvent proto with a length limit of 2,000,000
+     * characters.
+     * </pre>
+     *
+     * <code>string user_event = 2 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @return The userEvent.
+     */
+    public java.lang.String getUserEvent() {
+      java.lang.Object ref = userEvent_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        userEvent_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. URL encoded UserEvent proto with a length limit of 2,000,000
+     * characters.
+     * </pre>
+     *
+     * <code>string user_event = 2 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @return The bytes for userEvent.
+     */
+    public com.google.protobuf.ByteString getUserEventBytes() {
+      java.lang.Object ref = userEvent_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b =
+            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+        userEvent_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. URL encoded UserEvent proto with a length limit of 2,000,000
+     * characters.
+     * </pre>
+     *
+     * <code>string user_event = 2 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @param value The userEvent to set.
+     * @return This builder for chaining.
+     */
+    public Builder setUserEvent(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+
+      userEvent_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. URL encoded UserEvent proto with a length limit of 2,000,000
+     * characters.
+     * </pre>
+     *
+     * <code>string user_event = 2 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearUserEvent() {
+
+      userEvent_ = getDefaultInstance().getUserEvent();
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. URL encoded UserEvent proto with a length limit of 2,000,000
+     * characters.
+     * </pre>
+     *
+     * <code>string user_event = 2 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @param value The bytes for userEvent to set.
+     * @return This builder for chaining.
+     */
+    public Builder setUserEventBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+
+      userEvent_ = value;
+      onChanged();
+      return this;
+    }
+
+    private java.lang.Object uri_ = "";
+    /**
+     *
+     *
+     * <pre>
+     * The URL including cgi-parameters but excluding the hash fragment with a
+     * length limit of 5,000 characters. This is often more useful than the
+     * referer URL, because many browsers only send the domain for 3rd party
+     * requests.
+     * </pre>
+     *
+     * <code>string uri = 3;</code>
+     *
+     * @return The uri.
+     */
+    public java.lang.String getUri() {
+      java.lang.Object ref = uri_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        uri_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The URL including cgi-parameters but excluding the hash fragment with a
+     * length limit of 5,000 characters. This is often more useful than the
+     * referer URL, because many browsers only send the domain for 3rd party
+     * requests.
+     * </pre>
+     *
+     * <code>string uri = 3;</code>
+     *
+     * @return The bytes for uri.
+     */
+    public com.google.protobuf.ByteString getUriBytes() {
+      java.lang.Object ref = uri_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b =
+            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+        uri_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The URL including cgi-parameters but excluding the hash fragment with a
+     * length limit of 5,000 characters. This is often more useful than the
+     * referer URL, because many browsers only send the domain for 3rd party
+     * requests.
+     * </pre>
+     *
+     * <code>string uri = 3;</code>
+     *
+     * @param value The uri to set.
+     * @return This builder for chaining.
+     */
+    public Builder setUri(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+
+      uri_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The URL including cgi-parameters but excluding the hash fragment with a
+     * length limit of 5,000 characters. This is often more useful than the
+     * referer URL, because many browsers only send the domain for 3rd party
+     * requests.
+     * </pre>
+     *
+     * <code>string uri = 3;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearUri() {
+
+      uri_ = getDefaultInstance().getUri();
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The URL including cgi-parameters but excluding the hash fragment with a
+     * length limit of 5,000 characters. This is often more useful than the
+     * referer URL, because many browsers only send the domain for 3rd party
+     * requests.
+     * </pre>
+     *
+     * <code>string uri = 3;</code>
+     *
+     * @param value The bytes for uri to set.
+     * @return This builder for chaining.
+     */
+    public Builder setUriBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+
+      uri_ = value;
+      onChanged();
+      return this;
+    }
+
+    private long ets_;
+    /**
+     *
+     *
+     * <pre>
+     * The event timestamp in milliseconds. This prevents browser caching of
+     * otherwise identical get requests. The name is abbreviated to reduce the
+     * payload bytes.
+     * </pre>
+     *
+     * <code>int64 ets = 4;</code>
+     *
+     * @return The ets.
+     */
+    @java.lang.Override
+    public long getEts() {
+      return ets_;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The event timestamp in milliseconds. This prevents browser caching of
+     * otherwise identical get requests. The name is abbreviated to reduce the
+     * payload bytes.
+     * </pre>
+     *
+     * <code>int64 ets = 4;</code>
+     *
+     * @param value The ets to set.
+     * @return This builder for chaining.
+     */
+    public Builder setEts(long value) {
+
+      ets_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The event timestamp in milliseconds. This prevents browser caching of
+     * otherwise identical get requests. The name is abbreviated to reduce the
+     * payload bytes.
+     * </pre>
+     *
+     * <code>int64 ets = 4;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearEts() {
+
+      ets_ = 0L;
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.setUnknownFields(unknownFields);
+    }
+
+    @java.lang.Override
+    public final Builder mergeUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.mergeUnknownFields(unknownFields);
+    }
+
+    // @@protoc_insertion_point(builder_scope:google.cloud.retail.v2.CollectUserEventRequest)
+  }
+
+  // @@protoc_insertion_point(class_scope:google.cloud.retail.v2.CollectUserEventRequest)
+  private static final com.google.cloud.retail.v2.CollectUserEventRequest DEFAULT_INSTANCE;
+
+  static {
+    DEFAULT_INSTANCE = new com.google.cloud.retail.v2.CollectUserEventRequest();
+  }
+
+  public static com.google.cloud.retail.v2.CollectUserEventRequest getDefaultInstance() {
+    return DEFAULT_INSTANCE;
+  }
+
+  private static final com.google.protobuf.Parser<CollectUserEventRequest> PARSER =
+      new com.google.protobuf.AbstractParser<CollectUserEventRequest>() {
+        @java.lang.Override
+        public CollectUserEventRequest parsePartialFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws com.google.protobuf.InvalidProtocolBufferException {
+          return new CollectUserEventRequest(input, extensionRegistry);
+        }
+      };
+
+  public static com.google.protobuf.Parser<CollectUserEventRequest> parser() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.protobuf.Parser<CollectUserEventRequest> getParserForType() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.cloud.retail.v2.CollectUserEventRequest getDefaultInstanceForType() {
+    return DEFAULT_INSTANCE;
+  }
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/CollectUserEventRequestOrBuilder.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/CollectUserEventRequestOrBuilder.java
new file mode 100644
index 00000000..54342604
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/CollectUserEventRequestOrBuilder.java
@@ -0,0 +1,125 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/user_event_service.proto
+
+package com.google.cloud.retail.v2;
+
+public interface CollectUserEventRequestOrBuilder
+    extends
+    // @@protoc_insertion_point(interface_extends:google.cloud.retail.v2.CollectUserEventRequest)
+    com.google.protobuf.MessageOrBuilder {
+
+  /**
+   *
+   *
+   * <pre>
+   * Required. The parent catalog name, such as
+   * "projects/1234/locations/global/catalogs/default_catalog".
+   * </pre>
+   *
+   * <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The parent.
+   */
+  java.lang.String getParent();
+  /**
+   *
+   *
+   * <pre>
+   * Required. The parent catalog name, such as
+   * "projects/1234/locations/global/catalogs/default_catalog".
+   * </pre>
+   *
+   * <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The bytes for parent.
+   */
+  com.google.protobuf.ByteString getParentBytes();
+
+  /**
+   *
+   *
+   * <pre>
+   * Required. URL encoded UserEvent proto with a length limit of 2,000,000
+   * characters.
+   * </pre>
+   *
+   * <code>string user_event = 2 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The userEvent.
+   */
+  java.lang.String getUserEvent();
+  /**
+   *
+   *
+   * <pre>
+   * Required. URL encoded UserEvent proto with a length limit of 2,000,000
+   * characters.
+   * </pre>
+   *
+   * <code>string user_event = 2 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The bytes for userEvent.
+   */
+  com.google.protobuf.ByteString getUserEventBytes();
+
+  /**
+   *
+   *
+   * <pre>
+   * The URL including cgi-parameters but excluding the hash fragment with a
+   * length limit of 5,000 characters. This is often more useful than the
+   * referer URL, because many browsers only send the domain for 3rd party
+   * requests.
+   * </pre>
+   *
+   * <code>string uri = 3;</code>
+   *
+   * @return The uri.
+   */
+  java.lang.String getUri();
+  /**
+   *
+   *
+   * <pre>
+   * The URL including cgi-parameters but excluding the hash fragment with a
+   * length limit of 5,000 characters. This is often more useful than the
+   * referer URL, because many browsers only send the domain for 3rd party
+   * requests.
+   * </pre>
+   *
+   * <code>string uri = 3;</code>
+   *
+   * @return The bytes for uri.
+   */
+  com.google.protobuf.ByteString getUriBytes();
+
+  /**
+   *
+   *
+   * <pre>
+   * The event timestamp in milliseconds. This prevents browser caching of
+   * otherwise identical get requests. The name is abbreviated to reduce the
+   * payload bytes.
+   * </pre>
+   *
+   * <code>int64 ets = 4;</code>
+   *
+   * @return The ets.
+   */
+  long getEts();
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/CommonProto.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/CommonProto.java
new file mode 100644
index 00000000..f6634f99
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/CommonProto.java
@@ -0,0 +1,124 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/common.proto
+
+package com.google.cloud.retail.v2;
+
+public final class CommonProto {
+  private CommonProto() {}
+
+  public static void registerAllExtensions(com.google.protobuf.ExtensionRegistryLite registry) {}
+
+  public static void registerAllExtensions(com.google.protobuf.ExtensionRegistry registry) {
+    registerAllExtensions((com.google.protobuf.ExtensionRegistryLite) registry);
+  }
+
+  static final com.google.protobuf.Descriptors.Descriptor
+      internal_static_google_cloud_retail_v2_CustomAttribute_descriptor;
+  static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_google_cloud_retail_v2_CustomAttribute_fieldAccessorTable;
+  static final com.google.protobuf.Descriptors.Descriptor
+      internal_static_google_cloud_retail_v2_Image_descriptor;
+  static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_google_cloud_retail_v2_Image_fieldAccessorTable;
+  static final com.google.protobuf.Descriptors.Descriptor
+      internal_static_google_cloud_retail_v2_PriceInfo_descriptor;
+  static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_google_cloud_retail_v2_PriceInfo_fieldAccessorTable;
+  static final com.google.protobuf.Descriptors.Descriptor
+      internal_static_google_cloud_retail_v2_UserInfo_descriptor;
+  static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_google_cloud_retail_v2_UserInfo_fieldAccessorTable;
+
+  public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
+    return descriptor;
+  }
+
+  private static com.google.protobuf.Descriptors.FileDescriptor descriptor;
+
+  static {
+    java.lang.String[] descriptorData = {
+      "\n#google/cloud/retail/v2/common.proto\022\026g"
+          + "oogle.cloud.retail.v2\032\034google/api/annota"
+          + "tions.proto\032\037google/api/field_behavior.p"
+          + "roto\032\037google/protobuf/timestamp.proto\"0\n"
+          + "\017CustomAttribute\022\014\n\004text\030\001 \003(\t\022\017\n\007number"
+          + "s\030\002 \003(\001\"8\n\005Image\022\020\n\003uri\030\001 \001(\tB\003\340A\002\022\016\n\006he"
+          + "ight\030\002 \001(\005\022\r\n\005width\030\003 \001(\005\"W\n\tPriceInfo\022\025"
+          + "\n\rcurrency_code\030\001 \001(\t\022\r\n\005price\030\002 \001(\002\022\026\n\016"
+          + "original_price\030\003 \001(\002\022\014\n\004cost\030\004 \001(\002\"`\n\010Us"
+          + "erInfo\022\017\n\007user_id\030\001 \001(\t\022\022\n\nip_address\030\002 "
+          + "\001(\t\022\022\n\nuser_agent\030\003 \001(\t\022\033\n\023direct_user_r"
+          + "equest\030\004 \001(\010B\300\001\n\032com.google.cloud.retail"
+          + ".v2B\013CommonProtoP\001Z<google.golang.org/ge"
+          + "nproto/googleapis/cloud/retail/v2;retail"
+          + "\242\002\006RETAIL\252\002\026Google.Cloud.Retail.V2\312\002\026Goo"
+          + "gle\\Cloud\\Retail\\V2\352\002\031Google::Cloud::Ret"
+          + "ail::V2b\006proto3"
+    };
+    descriptor =
+        com.google.protobuf.Descriptors.FileDescriptor.internalBuildGeneratedFileFrom(
+            descriptorData,
+            new com.google.protobuf.Descriptors.FileDescriptor[] {
+              com.google.api.AnnotationsProto.getDescriptor(),
+              com.google.api.FieldBehaviorProto.getDescriptor(),
+              com.google.protobuf.TimestampProto.getDescriptor(),
+            });
+    internal_static_google_cloud_retail_v2_CustomAttribute_descriptor =
+        getDescriptor().getMessageTypes().get(0);
+    internal_static_google_cloud_retail_v2_CustomAttribute_fieldAccessorTable =
+        new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+            internal_static_google_cloud_retail_v2_CustomAttribute_descriptor,
+            new java.lang.String[] {
+              "Text", "Numbers",
+            });
+    internal_static_google_cloud_retail_v2_Image_descriptor =
+        getDescriptor().getMessageTypes().get(1);
+    internal_static_google_cloud_retail_v2_Image_fieldAccessorTable =
+        new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+            internal_static_google_cloud_retail_v2_Image_descriptor,
+            new java.lang.String[] {
+              "Uri", "Height", "Width",
+            });
+    internal_static_google_cloud_retail_v2_PriceInfo_descriptor =
+        getDescriptor().getMessageTypes().get(2);
+    internal_static_google_cloud_retail_v2_PriceInfo_fieldAccessorTable =
+        new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+            internal_static_google_cloud_retail_v2_PriceInfo_descriptor,
+            new java.lang.String[] {
+              "CurrencyCode", "Price", "OriginalPrice", "Cost",
+            });
+    internal_static_google_cloud_retail_v2_UserInfo_descriptor =
+        getDescriptor().getMessageTypes().get(3);
+    internal_static_google_cloud_retail_v2_UserInfo_fieldAccessorTable =
+        new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+            internal_static_google_cloud_retail_v2_UserInfo_descriptor,
+            new java.lang.String[] {
+              "UserId", "IpAddress", "UserAgent", "DirectUserRequest",
+            });
+    com.google.protobuf.ExtensionRegistry registry =
+        com.google.protobuf.ExtensionRegistry.newInstance();
+    registry.add(com.google.api.FieldBehaviorProto.fieldBehavior);
+    com.google.protobuf.Descriptors.FileDescriptor.internalUpdateFileDescriptor(
+        descriptor, registry);
+    com.google.api.AnnotationsProto.getDescriptor();
+    com.google.api.FieldBehaviorProto.getDescriptor();
+    com.google.protobuf.TimestampProto.getDescriptor();
+  }
+
+  // @@protoc_insertion_point(outer_class_scope)
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/CreateProductRequest.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/CreateProductRequest.java
new file mode 100644
index 00000000..cf167981
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/CreateProductRequest.java
@@ -0,0 +1,1198 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/product_service.proto
+
+package com.google.cloud.retail.v2;
+
+/**
+ *
+ *
+ * <pre>
+ * Request message for [CreateProduct][] method.
+ * </pre>
+ *
+ * Protobuf type {@code google.cloud.retail.v2.CreateProductRequest}
+ */
+public final class CreateProductRequest extends com.google.protobuf.GeneratedMessageV3
+    implements
+    // @@protoc_insertion_point(message_implements:google.cloud.retail.v2.CreateProductRequest)
+    CreateProductRequestOrBuilder {
+  private static final long serialVersionUID = 0L;
+  // Use CreateProductRequest.newBuilder() to construct.
+  private CreateProductRequest(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+    super(builder);
+  }
+
+  private CreateProductRequest() {
+    parent_ = "";
+    productId_ = "";
+  }
+
+  @java.lang.Override
+  @SuppressWarnings({"unused"})
+  protected java.lang.Object newInstance(UnusedPrivateParameter unused) {
+    return new CreateProductRequest();
+  }
+
+  @java.lang.Override
+  public final com.google.protobuf.UnknownFieldSet getUnknownFields() {
+    return this.unknownFields;
+  }
+
+  private CreateProductRequest(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    this();
+    if (extensionRegistry == null) {
+      throw new java.lang.NullPointerException();
+    }
+    com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+        com.google.protobuf.UnknownFieldSet.newBuilder();
+    try {
+      boolean done = false;
+      while (!done) {
+        int tag = input.readTag();
+        switch (tag) {
+          case 0:
+            done = true;
+            break;
+          case 10:
+            {
+              java.lang.String s = input.readStringRequireUtf8();
+
+              parent_ = s;
+              break;
+            }
+          case 18:
+            {
+              com.google.cloud.retail.v2.Product.Builder subBuilder = null;
+              if (product_ != null) {
+                subBuilder = product_.toBuilder();
+              }
+              product_ =
+                  input.readMessage(com.google.cloud.retail.v2.Product.parser(), extensionRegistry);
+              if (subBuilder != null) {
+                subBuilder.mergeFrom(product_);
+                product_ = subBuilder.buildPartial();
+              }
+
+              break;
+            }
+          case 26:
+            {
+              java.lang.String s = input.readStringRequireUtf8();
+
+              productId_ = s;
+              break;
+            }
+          default:
+            {
+              if (!parseUnknownField(input, unknownFields, extensionRegistry, tag)) {
+                done = true;
+              }
+              break;
+            }
+        }
+      }
+    } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+      throw e.setUnfinishedMessage(this);
+    } catch (java.io.IOException e) {
+      throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
+    } finally {
+      this.unknownFields = unknownFields.build();
+      makeExtensionsImmutable();
+    }
+  }
+
+  public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+    return com.google.cloud.retail.v2.ProductServiceProto
+        .internal_static_google_cloud_retail_v2_CreateProductRequest_descriptor;
+  }
+
+  @java.lang.Override
+  protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internalGetFieldAccessorTable() {
+    return com.google.cloud.retail.v2.ProductServiceProto
+        .internal_static_google_cloud_retail_v2_CreateProductRequest_fieldAccessorTable
+        .ensureFieldAccessorsInitialized(
+            com.google.cloud.retail.v2.CreateProductRequest.class,
+            com.google.cloud.retail.v2.CreateProductRequest.Builder.class);
+  }
+
+  public static final int PARENT_FIELD_NUMBER = 1;
+  private volatile java.lang.Object parent_;
+  /**
+   *
+   *
+   * <pre>
+   * Required. The parent catalog resource name, such as
+   * "projects/&#42;&#47;locations/global/catalogs/default_catalog/branches/default_branch".
+   * </pre>
+   *
+   * <code>
+   * string parent = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+   * </code>
+   *
+   * @return The parent.
+   */
+  @java.lang.Override
+  public java.lang.String getParent() {
+    java.lang.Object ref = parent_;
+    if (ref instanceof java.lang.String) {
+      return (java.lang.String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+      java.lang.String s = bs.toStringUtf8();
+      parent_ = s;
+      return s;
+    }
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Required. The parent catalog resource name, such as
+   * "projects/&#42;&#47;locations/global/catalogs/default_catalog/branches/default_branch".
+   * </pre>
+   *
+   * <code>
+   * string parent = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+   * </code>
+   *
+   * @return The bytes for parent.
+   */
+  @java.lang.Override
+  public com.google.protobuf.ByteString getParentBytes() {
+    java.lang.Object ref = parent_;
+    if (ref instanceof java.lang.String) {
+      com.google.protobuf.ByteString b =
+          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+      parent_ = b;
+      return b;
+    } else {
+      return (com.google.protobuf.ByteString) ref;
+    }
+  }
+
+  public static final int PRODUCT_FIELD_NUMBER = 2;
+  private com.google.cloud.retail.v2.Product product_;
+  /**
+   *
+   *
+   * <pre>
+   * Required. The [Product][google.cloud.retail.v2.Product] to create.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.Product product = 2 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   *
+   * @return Whether the product field is set.
+   */
+  @java.lang.Override
+  public boolean hasProduct() {
+    return product_ != null;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Required. The [Product][google.cloud.retail.v2.Product] to create.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.Product product = 2 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   *
+   * @return The product.
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.Product getProduct() {
+    return product_ == null ? com.google.cloud.retail.v2.Product.getDefaultInstance() : product_;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Required. The [Product][google.cloud.retail.v2.Product] to create.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.Product product = 2 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.ProductOrBuilder getProductOrBuilder() {
+    return getProduct();
+  }
+
+  public static final int PRODUCT_ID_FIELD_NUMBER = 3;
+  private volatile java.lang.Object productId_;
+  /**
+   *
+   *
+   * <pre>
+   * Required. The ID to use for the [Product][google.cloud.retail.v2.Product],
+   * which will become the final component of the
+   * [Product.name][google.cloud.retail.v2.Product.name].
+   * If the caller does not have permission to create the
+   * [Product][google.cloud.retail.v2.Product], regardless of whether or not it
+   * exists, a PERMISSION_DENIED error is returned.
+   * This field must be unique among all
+   * [Product][google.cloud.retail.v2.Product]s with the same
+   * [parent][google.cloud.retail.v2.CreateProductRequest.parent]. Otherwise, an
+   * ALREADY_EXISTS error is returned.
+   * This field must be a UTF-8 encoded string with a length limit of 128
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * </pre>
+   *
+   * <code>string product_id = 3 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The productId.
+   */
+  @java.lang.Override
+  public java.lang.String getProductId() {
+    java.lang.Object ref = productId_;
+    if (ref instanceof java.lang.String) {
+      return (java.lang.String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+      java.lang.String s = bs.toStringUtf8();
+      productId_ = s;
+      return s;
+    }
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Required. The ID to use for the [Product][google.cloud.retail.v2.Product],
+   * which will become the final component of the
+   * [Product.name][google.cloud.retail.v2.Product.name].
+   * If the caller does not have permission to create the
+   * [Product][google.cloud.retail.v2.Product], regardless of whether or not it
+   * exists, a PERMISSION_DENIED error is returned.
+   * This field must be unique among all
+   * [Product][google.cloud.retail.v2.Product]s with the same
+   * [parent][google.cloud.retail.v2.CreateProductRequest.parent]. Otherwise, an
+   * ALREADY_EXISTS error is returned.
+   * This field must be a UTF-8 encoded string with a length limit of 128
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * </pre>
+   *
+   * <code>string product_id = 3 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The bytes for productId.
+   */
+  @java.lang.Override
+  public com.google.protobuf.ByteString getProductIdBytes() {
+    java.lang.Object ref = productId_;
+    if (ref instanceof java.lang.String) {
+      com.google.protobuf.ByteString b =
+          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+      productId_ = b;
+      return b;
+    } else {
+      return (com.google.protobuf.ByteString) ref;
+    }
+  }
+
+  private byte memoizedIsInitialized = -1;
+
+  @java.lang.Override
+  public final boolean isInitialized() {
+    byte isInitialized = memoizedIsInitialized;
+    if (isInitialized == 1) return true;
+    if (isInitialized == 0) return false;
+
+    memoizedIsInitialized = 1;
+    return true;
+  }
+
+  @java.lang.Override
+  public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
+    if (!getParentBytes().isEmpty()) {
+      com.google.protobuf.GeneratedMessageV3.writeString(output, 1, parent_);
+    }
+    if (product_ != null) {
+      output.writeMessage(2, getProduct());
+    }
+    if (!getProductIdBytes().isEmpty()) {
+      com.google.protobuf.GeneratedMessageV3.writeString(output, 3, productId_);
+    }
+    unknownFields.writeTo(output);
+  }
+
+  @java.lang.Override
+  public int getSerializedSize() {
+    int size = memoizedSize;
+    if (size != -1) return size;
+
+    size = 0;
+    if (!getParentBytes().isEmpty()) {
+      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(1, parent_);
+    }
+    if (product_ != null) {
+      size += com.google.protobuf.CodedOutputStream.computeMessageSize(2, getProduct());
+    }
+    if (!getProductIdBytes().isEmpty()) {
+      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(3, productId_);
+    }
+    size += unknownFields.getSerializedSize();
+    memoizedSize = size;
+    return size;
+  }
+
+  @java.lang.Override
+  public boolean equals(final java.lang.Object obj) {
+    if (obj == this) {
+      return true;
+    }
+    if (!(obj instanceof com.google.cloud.retail.v2.CreateProductRequest)) {
+      return super.equals(obj);
+    }
+    com.google.cloud.retail.v2.CreateProductRequest other =
+        (com.google.cloud.retail.v2.CreateProductRequest) obj;
+
+    if (!getParent().equals(other.getParent())) return false;
+    if (hasProduct() != other.hasProduct()) return false;
+    if (hasProduct()) {
+      if (!getProduct().equals(other.getProduct())) return false;
+    }
+    if (!getProductId().equals(other.getProductId())) return false;
+    if (!unknownFields.equals(other.unknownFields)) return false;
+    return true;
+  }
+
+  @java.lang.Override
+  public int hashCode() {
+    if (memoizedHashCode != 0) {
+      return memoizedHashCode;
+    }
+    int hash = 41;
+    hash = (19 * hash) + getDescriptor().hashCode();
+    hash = (37 * hash) + PARENT_FIELD_NUMBER;
+    hash = (53 * hash) + getParent().hashCode();
+    if (hasProduct()) {
+      hash = (37 * hash) + PRODUCT_FIELD_NUMBER;
+      hash = (53 * hash) + getProduct().hashCode();
+    }
+    hash = (37 * hash) + PRODUCT_ID_FIELD_NUMBER;
+    hash = (53 * hash) + getProductId().hashCode();
+    hash = (29 * hash) + unknownFields.hashCode();
+    memoizedHashCode = hash;
+    return hash;
+  }
+
+  public static com.google.cloud.retail.v2.CreateProductRequest parseFrom(java.nio.ByteBuffer data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.CreateProductRequest parseFrom(
+      java.nio.ByteBuffer data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.CreateProductRequest parseFrom(
+      com.google.protobuf.ByteString data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.CreateProductRequest parseFrom(
+      com.google.protobuf.ByteString data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.CreateProductRequest parseFrom(byte[] data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.CreateProductRequest parseFrom(
+      byte[] data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.CreateProductRequest parseFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.CreateProductRequest parseFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.CreateProductRequest parseDelimitedFrom(
+      java.io.InputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.CreateProductRequest parseDelimitedFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.CreateProductRequest parseFrom(
+      com.google.protobuf.CodedInputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.CreateProductRequest parseFrom(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  @java.lang.Override
+  public Builder newBuilderForType() {
+    return newBuilder();
+  }
+
+  public static Builder newBuilder() {
+    return DEFAULT_INSTANCE.toBuilder();
+  }
+
+  public static Builder newBuilder(com.google.cloud.retail.v2.CreateProductRequest prototype) {
+    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+  }
+
+  @java.lang.Override
+  public Builder toBuilder() {
+    return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
+  }
+
+  @java.lang.Override
+  protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+    Builder builder = new Builder(parent);
+    return builder;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Request message for [CreateProduct][] method.
+   * </pre>
+   *
+   * Protobuf type {@code google.cloud.retail.v2.CreateProductRequest}
+   */
+  public static final class Builder extends com.google.protobuf.GeneratedMessageV3.Builder<Builder>
+      implements
+      // @@protoc_insertion_point(builder_implements:google.cloud.retail.v2.CreateProductRequest)
+      com.google.cloud.retail.v2.CreateProductRequestOrBuilder {
+    public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+      return com.google.cloud.retail.v2.ProductServiceProto
+          .internal_static_google_cloud_retail_v2_CreateProductRequest_descriptor;
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return com.google.cloud.retail.v2.ProductServiceProto
+          .internal_static_google_cloud_retail_v2_CreateProductRequest_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              com.google.cloud.retail.v2.CreateProductRequest.class,
+              com.google.cloud.retail.v2.CreateProductRequest.Builder.class);
+    }
+
+    // Construct using com.google.cloud.retail.v2.CreateProductRequest.newBuilder()
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
+
+    private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+      super(parent);
+      maybeForceBuilderInitialization();
+    }
+
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders) {}
+    }
+
+    @java.lang.Override
+    public Builder clear() {
+      super.clear();
+      parent_ = "";
+
+      if (productBuilder_ == null) {
+        product_ = null;
+      } else {
+        product_ = null;
+        productBuilder_ = null;
+      }
+      productId_ = "";
+
+      return this;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
+      return com.google.cloud.retail.v2.ProductServiceProto
+          .internal_static_google_cloud_retail_v2_CreateProductRequest_descriptor;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.CreateProductRequest getDefaultInstanceForType() {
+      return com.google.cloud.retail.v2.CreateProductRequest.getDefaultInstance();
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.CreateProductRequest build() {
+      com.google.cloud.retail.v2.CreateProductRequest result = buildPartial();
+      if (!result.isInitialized()) {
+        throw newUninitializedMessageException(result);
+      }
+      return result;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.CreateProductRequest buildPartial() {
+      com.google.cloud.retail.v2.CreateProductRequest result =
+          new com.google.cloud.retail.v2.CreateProductRequest(this);
+      result.parent_ = parent_;
+      if (productBuilder_ == null) {
+        result.product_ = product_;
+      } else {
+        result.product_ = productBuilder_.build();
+      }
+      result.productId_ = productId_;
+      onBuilt();
+      return result;
+    }
+
+    @java.lang.Override
+    public Builder clone() {
+      return super.clone();
+    }
+
+    @java.lang.Override
+    public Builder setField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.setField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
+      return super.clearField(field);
+    }
+
+    @java.lang.Override
+    public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+      return super.clearOneof(oneof);
+    }
+
+    @java.lang.Override
+    public Builder setRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, int index, java.lang.Object value) {
+      return super.setRepeatedField(field, index, value);
+    }
+
+    @java.lang.Override
+    public Builder addRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.addRepeatedField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(com.google.protobuf.Message other) {
+      if (other instanceof com.google.cloud.retail.v2.CreateProductRequest) {
+        return mergeFrom((com.google.cloud.retail.v2.CreateProductRequest) other);
+      } else {
+        super.mergeFrom(other);
+        return this;
+      }
+    }
+
+    public Builder mergeFrom(com.google.cloud.retail.v2.CreateProductRequest other) {
+      if (other == com.google.cloud.retail.v2.CreateProductRequest.getDefaultInstance())
+        return this;
+      if (!other.getParent().isEmpty()) {
+        parent_ = other.parent_;
+        onChanged();
+      }
+      if (other.hasProduct()) {
+        mergeProduct(other.getProduct());
+      }
+      if (!other.getProductId().isEmpty()) {
+        productId_ = other.productId_;
+        onChanged();
+      }
+      this.mergeUnknownFields(other.unknownFields);
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final boolean isInitialized() {
+      return true;
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      com.google.cloud.retail.v2.CreateProductRequest parsedMessage = null;
+      try {
+        parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        parsedMessage = (com.google.cloud.retail.v2.CreateProductRequest) e.getUnfinishedMessage();
+        throw e.unwrapIOException();
+      } finally {
+        if (parsedMessage != null) {
+          mergeFrom(parsedMessage);
+        }
+      }
+      return this;
+    }
+
+    private java.lang.Object parent_ = "";
+    /**
+     *
+     *
+     * <pre>
+     * Required. The parent catalog resource name, such as
+     * "projects/&#42;&#47;locations/global/catalogs/default_catalog/branches/default_branch".
+     * </pre>
+     *
+     * <code>
+     * string parent = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * </code>
+     *
+     * @return The parent.
+     */
+    public java.lang.String getParent() {
+      java.lang.Object ref = parent_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        parent_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The parent catalog resource name, such as
+     * "projects/&#42;&#47;locations/global/catalogs/default_catalog/branches/default_branch".
+     * </pre>
+     *
+     * <code>
+     * string parent = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * </code>
+     *
+     * @return The bytes for parent.
+     */
+    public com.google.protobuf.ByteString getParentBytes() {
+      java.lang.Object ref = parent_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b =
+            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+        parent_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The parent catalog resource name, such as
+     * "projects/&#42;&#47;locations/global/catalogs/default_catalog/branches/default_branch".
+     * </pre>
+     *
+     * <code>
+     * string parent = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * </code>
+     *
+     * @param value The parent to set.
+     * @return This builder for chaining.
+     */
+    public Builder setParent(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+
+      parent_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The parent catalog resource name, such as
+     * "projects/&#42;&#47;locations/global/catalogs/default_catalog/branches/default_branch".
+     * </pre>
+     *
+     * <code>
+     * string parent = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * </code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearParent() {
+
+      parent_ = getDefaultInstance().getParent();
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The parent catalog resource name, such as
+     * "projects/&#42;&#47;locations/global/catalogs/default_catalog/branches/default_branch".
+     * </pre>
+     *
+     * <code>
+     * string parent = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * </code>
+     *
+     * @param value The bytes for parent to set.
+     * @return This builder for chaining.
+     */
+    public Builder setParentBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+
+      parent_ = value;
+      onChanged();
+      return this;
+    }
+
+    private com.google.cloud.retail.v2.Product product_;
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.cloud.retail.v2.Product,
+            com.google.cloud.retail.v2.Product.Builder,
+            com.google.cloud.retail.v2.ProductOrBuilder>
+        productBuilder_;
+    /**
+     *
+     *
+     * <pre>
+     * Required. The [Product][google.cloud.retail.v2.Product] to create.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.Product product = 2 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     *
+     * @return Whether the product field is set.
+     */
+    public boolean hasProduct() {
+      return productBuilder_ != null || product_ != null;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The [Product][google.cloud.retail.v2.Product] to create.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.Product product = 2 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     *
+     * @return The product.
+     */
+    public com.google.cloud.retail.v2.Product getProduct() {
+      if (productBuilder_ == null) {
+        return product_ == null
+            ? com.google.cloud.retail.v2.Product.getDefaultInstance()
+            : product_;
+      } else {
+        return productBuilder_.getMessage();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The [Product][google.cloud.retail.v2.Product] to create.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.Product product = 2 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder setProduct(com.google.cloud.retail.v2.Product value) {
+      if (productBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        product_ = value;
+        onChanged();
+      } else {
+        productBuilder_.setMessage(value);
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The [Product][google.cloud.retail.v2.Product] to create.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.Product product = 2 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder setProduct(com.google.cloud.retail.v2.Product.Builder builderForValue) {
+      if (productBuilder_ == null) {
+        product_ = builderForValue.build();
+        onChanged();
+      } else {
+        productBuilder_.setMessage(builderForValue.build());
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The [Product][google.cloud.retail.v2.Product] to create.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.Product product = 2 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder mergeProduct(com.google.cloud.retail.v2.Product value) {
+      if (productBuilder_ == null) {
+        if (product_ != null) {
+          product_ =
+              com.google.cloud.retail.v2.Product.newBuilder(product_)
+                  .mergeFrom(value)
+                  .buildPartial();
+        } else {
+          product_ = value;
+        }
+        onChanged();
+      } else {
+        productBuilder_.mergeFrom(value);
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The [Product][google.cloud.retail.v2.Product] to create.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.Product product = 2 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder clearProduct() {
+      if (productBuilder_ == null) {
+        product_ = null;
+        onChanged();
+      } else {
+        product_ = null;
+        productBuilder_ = null;
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The [Product][google.cloud.retail.v2.Product] to create.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.Product product = 2 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public com.google.cloud.retail.v2.Product.Builder getProductBuilder() {
+
+      onChanged();
+      return getProductFieldBuilder().getBuilder();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The [Product][google.cloud.retail.v2.Product] to create.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.Product product = 2 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public com.google.cloud.retail.v2.ProductOrBuilder getProductOrBuilder() {
+      if (productBuilder_ != null) {
+        return productBuilder_.getMessageOrBuilder();
+      } else {
+        return product_ == null
+            ? com.google.cloud.retail.v2.Product.getDefaultInstance()
+            : product_;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The [Product][google.cloud.retail.v2.Product] to create.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.Product product = 2 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.cloud.retail.v2.Product,
+            com.google.cloud.retail.v2.Product.Builder,
+            com.google.cloud.retail.v2.ProductOrBuilder>
+        getProductFieldBuilder() {
+      if (productBuilder_ == null) {
+        productBuilder_ =
+            new com.google.protobuf.SingleFieldBuilderV3<
+                com.google.cloud.retail.v2.Product,
+                com.google.cloud.retail.v2.Product.Builder,
+                com.google.cloud.retail.v2.ProductOrBuilder>(
+                getProduct(), getParentForChildren(), isClean());
+        product_ = null;
+      }
+      return productBuilder_;
+    }
+
+    private java.lang.Object productId_ = "";
+    /**
+     *
+     *
+     * <pre>
+     * Required. The ID to use for the [Product][google.cloud.retail.v2.Product],
+     * which will become the final component of the
+     * [Product.name][google.cloud.retail.v2.Product.name].
+     * If the caller does not have permission to create the
+     * [Product][google.cloud.retail.v2.Product], regardless of whether or not it
+     * exists, a PERMISSION_DENIED error is returned.
+     * This field must be unique among all
+     * [Product][google.cloud.retail.v2.Product]s with the same
+     * [parent][google.cloud.retail.v2.CreateProductRequest.parent]. Otherwise, an
+     * ALREADY_EXISTS error is returned.
+     * This field must be a UTF-8 encoded string with a length limit of 128
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>string product_id = 3 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @return The productId.
+     */
+    public java.lang.String getProductId() {
+      java.lang.Object ref = productId_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        productId_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The ID to use for the [Product][google.cloud.retail.v2.Product],
+     * which will become the final component of the
+     * [Product.name][google.cloud.retail.v2.Product.name].
+     * If the caller does not have permission to create the
+     * [Product][google.cloud.retail.v2.Product], regardless of whether or not it
+     * exists, a PERMISSION_DENIED error is returned.
+     * This field must be unique among all
+     * [Product][google.cloud.retail.v2.Product]s with the same
+     * [parent][google.cloud.retail.v2.CreateProductRequest.parent]. Otherwise, an
+     * ALREADY_EXISTS error is returned.
+     * This field must be a UTF-8 encoded string with a length limit of 128
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>string product_id = 3 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @return The bytes for productId.
+     */
+    public com.google.protobuf.ByteString getProductIdBytes() {
+      java.lang.Object ref = productId_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b =
+            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+        productId_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The ID to use for the [Product][google.cloud.retail.v2.Product],
+     * which will become the final component of the
+     * [Product.name][google.cloud.retail.v2.Product.name].
+     * If the caller does not have permission to create the
+     * [Product][google.cloud.retail.v2.Product], regardless of whether or not it
+     * exists, a PERMISSION_DENIED error is returned.
+     * This field must be unique among all
+     * [Product][google.cloud.retail.v2.Product]s with the same
+     * [parent][google.cloud.retail.v2.CreateProductRequest.parent]. Otherwise, an
+     * ALREADY_EXISTS error is returned.
+     * This field must be a UTF-8 encoded string with a length limit of 128
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>string product_id = 3 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @param value The productId to set.
+     * @return This builder for chaining.
+     */
+    public Builder setProductId(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+
+      productId_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The ID to use for the [Product][google.cloud.retail.v2.Product],
+     * which will become the final component of the
+     * [Product.name][google.cloud.retail.v2.Product.name].
+     * If the caller does not have permission to create the
+     * [Product][google.cloud.retail.v2.Product], regardless of whether or not it
+     * exists, a PERMISSION_DENIED error is returned.
+     * This field must be unique among all
+     * [Product][google.cloud.retail.v2.Product]s with the same
+     * [parent][google.cloud.retail.v2.CreateProductRequest.parent]. Otherwise, an
+     * ALREADY_EXISTS error is returned.
+     * This field must be a UTF-8 encoded string with a length limit of 128
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>string product_id = 3 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearProductId() {
+
+      productId_ = getDefaultInstance().getProductId();
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The ID to use for the [Product][google.cloud.retail.v2.Product],
+     * which will become the final component of the
+     * [Product.name][google.cloud.retail.v2.Product.name].
+     * If the caller does not have permission to create the
+     * [Product][google.cloud.retail.v2.Product], regardless of whether or not it
+     * exists, a PERMISSION_DENIED error is returned.
+     * This field must be unique among all
+     * [Product][google.cloud.retail.v2.Product]s with the same
+     * [parent][google.cloud.retail.v2.CreateProductRequest.parent]. Otherwise, an
+     * ALREADY_EXISTS error is returned.
+     * This field must be a UTF-8 encoded string with a length limit of 128
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>string product_id = 3 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @param value The bytes for productId to set.
+     * @return This builder for chaining.
+     */
+    public Builder setProductIdBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+
+      productId_ = value;
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.setUnknownFields(unknownFields);
+    }
+
+    @java.lang.Override
+    public final Builder mergeUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.mergeUnknownFields(unknownFields);
+    }
+
+    // @@protoc_insertion_point(builder_scope:google.cloud.retail.v2.CreateProductRequest)
+  }
+
+  // @@protoc_insertion_point(class_scope:google.cloud.retail.v2.CreateProductRequest)
+  private static final com.google.cloud.retail.v2.CreateProductRequest DEFAULT_INSTANCE;
+
+  static {
+    DEFAULT_INSTANCE = new com.google.cloud.retail.v2.CreateProductRequest();
+  }
+
+  public static com.google.cloud.retail.v2.CreateProductRequest getDefaultInstance() {
+    return DEFAULT_INSTANCE;
+  }
+
+  private static final com.google.protobuf.Parser<CreateProductRequest> PARSER =
+      new com.google.protobuf.AbstractParser<CreateProductRequest>() {
+        @java.lang.Override
+        public CreateProductRequest parsePartialFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws com.google.protobuf.InvalidProtocolBufferException {
+          return new CreateProductRequest(input, extensionRegistry);
+        }
+      };
+
+  public static com.google.protobuf.Parser<CreateProductRequest> parser() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.protobuf.Parser<CreateProductRequest> getParserForType() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.cloud.retail.v2.CreateProductRequest getDefaultInstanceForType() {
+    return DEFAULT_INSTANCE;
+  }
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/CreateProductRequestOrBuilder.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/CreateProductRequestOrBuilder.java
new file mode 100644
index 00000000..6acc8c4e
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/CreateProductRequestOrBuilder.java
@@ -0,0 +1,141 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/product_service.proto
+
+package com.google.cloud.retail.v2;
+
+public interface CreateProductRequestOrBuilder
+    extends
+    // @@protoc_insertion_point(interface_extends:google.cloud.retail.v2.CreateProductRequest)
+    com.google.protobuf.MessageOrBuilder {
+
+  /**
+   *
+   *
+   * <pre>
+   * Required. The parent catalog resource name, such as
+   * "projects/&#42;&#47;locations/global/catalogs/default_catalog/branches/default_branch".
+   * </pre>
+   *
+   * <code>
+   * string parent = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+   * </code>
+   *
+   * @return The parent.
+   */
+  java.lang.String getParent();
+  /**
+   *
+   *
+   * <pre>
+   * Required. The parent catalog resource name, such as
+   * "projects/&#42;&#47;locations/global/catalogs/default_catalog/branches/default_branch".
+   * </pre>
+   *
+   * <code>
+   * string parent = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+   * </code>
+   *
+   * @return The bytes for parent.
+   */
+  com.google.protobuf.ByteString getParentBytes();
+
+  /**
+   *
+   *
+   * <pre>
+   * Required. The [Product][google.cloud.retail.v2.Product] to create.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.Product product = 2 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   *
+   * @return Whether the product field is set.
+   */
+  boolean hasProduct();
+  /**
+   *
+   *
+   * <pre>
+   * Required. The [Product][google.cloud.retail.v2.Product] to create.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.Product product = 2 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   *
+   * @return The product.
+   */
+  com.google.cloud.retail.v2.Product getProduct();
+  /**
+   *
+   *
+   * <pre>
+   * Required. The [Product][google.cloud.retail.v2.Product] to create.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.Product product = 2 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   */
+  com.google.cloud.retail.v2.ProductOrBuilder getProductOrBuilder();
+
+  /**
+   *
+   *
+   * <pre>
+   * Required. The ID to use for the [Product][google.cloud.retail.v2.Product],
+   * which will become the final component of the
+   * [Product.name][google.cloud.retail.v2.Product.name].
+   * If the caller does not have permission to create the
+   * [Product][google.cloud.retail.v2.Product], regardless of whether or not it
+   * exists, a PERMISSION_DENIED error is returned.
+   * This field must be unique among all
+   * [Product][google.cloud.retail.v2.Product]s with the same
+   * [parent][google.cloud.retail.v2.CreateProductRequest.parent]. Otherwise, an
+   * ALREADY_EXISTS error is returned.
+   * This field must be a UTF-8 encoded string with a length limit of 128
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * </pre>
+   *
+   * <code>string product_id = 3 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The productId.
+   */
+  java.lang.String getProductId();
+  /**
+   *
+   *
+   * <pre>
+   * Required. The ID to use for the [Product][google.cloud.retail.v2.Product],
+   * which will become the final component of the
+   * [Product.name][google.cloud.retail.v2.Product.name].
+   * If the caller does not have permission to create the
+   * [Product][google.cloud.retail.v2.Product], regardless of whether or not it
+   * exists, a PERMISSION_DENIED error is returned.
+   * This field must be unique among all
+   * [Product][google.cloud.retail.v2.Product]s with the same
+   * [parent][google.cloud.retail.v2.CreateProductRequest.parent]. Otherwise, an
+   * ALREADY_EXISTS error is returned.
+   * This field must be a UTF-8 encoded string with a length limit of 128
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * </pre>
+   *
+   * <code>string product_id = 3 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The bytes for productId.
+   */
+  com.google.protobuf.ByteString getProductIdBytes();
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/CustomAttribute.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/CustomAttribute.java
new file mode 100644
index 00000000..18f6e067
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/CustomAttribute.java
@@ -0,0 +1,1130 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/common.proto
+
+package com.google.cloud.retail.v2;
+
+/**
+ *
+ *
+ * <pre>
+ * A custom attribute that is not explicitly modeled in
+ * [Product][google.cloud.retail.v2.Product]].
+ * </pre>
+ *
+ * Protobuf type {@code google.cloud.retail.v2.CustomAttribute}
+ */
+public final class CustomAttribute extends com.google.protobuf.GeneratedMessageV3
+    implements
+    // @@protoc_insertion_point(message_implements:google.cloud.retail.v2.CustomAttribute)
+    CustomAttributeOrBuilder {
+  private static final long serialVersionUID = 0L;
+  // Use CustomAttribute.newBuilder() to construct.
+  private CustomAttribute(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+    super(builder);
+  }
+
+  private CustomAttribute() {
+    text_ = com.google.protobuf.LazyStringArrayList.EMPTY;
+    numbers_ = emptyDoubleList();
+  }
+
+  @java.lang.Override
+  @SuppressWarnings({"unused"})
+  protected java.lang.Object newInstance(UnusedPrivateParameter unused) {
+    return new CustomAttribute();
+  }
+
+  @java.lang.Override
+  public final com.google.protobuf.UnknownFieldSet getUnknownFields() {
+    return this.unknownFields;
+  }
+
+  private CustomAttribute(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    this();
+    if (extensionRegistry == null) {
+      throw new java.lang.NullPointerException();
+    }
+    int mutable_bitField0_ = 0;
+    com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+        com.google.protobuf.UnknownFieldSet.newBuilder();
+    try {
+      boolean done = false;
+      while (!done) {
+        int tag = input.readTag();
+        switch (tag) {
+          case 0:
+            done = true;
+            break;
+          case 10:
+            {
+              java.lang.String s = input.readStringRequireUtf8();
+              if (!((mutable_bitField0_ & 0x00000001) != 0)) {
+                text_ = new com.google.protobuf.LazyStringArrayList();
+                mutable_bitField0_ |= 0x00000001;
+              }
+              text_.add(s);
+              break;
+            }
+          case 17:
+            {
+              if (!((mutable_bitField0_ & 0x00000002) != 0)) {
+                numbers_ = newDoubleList();
+                mutable_bitField0_ |= 0x00000002;
+              }
+              numbers_.addDouble(input.readDouble());
+              break;
+            }
+          case 18:
+            {
+              int length = input.readRawVarint32();
+              int limit = input.pushLimit(length);
+              if (!((mutable_bitField0_ & 0x00000002) != 0) && input.getBytesUntilLimit() > 0) {
+                numbers_ = newDoubleList();
+                mutable_bitField0_ |= 0x00000002;
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+  }
+
+  public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+    return com.google.cloud.retail.v2.CommonProto
+        .internal_static_google_cloud_retail_v2_CustomAttribute_descriptor;
+  }
+
+  @java.lang.Override
+  protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internalGetFieldAccessorTable() {
+    return com.google.cloud.retail.v2.CommonProto
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+        .ensureFieldAccessorsInitialized(
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+  private com.google.protobuf.LazyStringList text_;
+  /**
+   *
+   *
+   * <pre>
+   * The textual values of this custom attribute. For example, `["yellow",
+   * "green"]` when the key is "color".
+   * At most 400 values are allowed. Empty values are not allowed. Each value
+   * must be a UTF-8 encoded string with a length limit of 256 characters.
+   * Otherwise, an INVALID_ARGUMENT error is returned.
+   * Exactly one of [text][google.cloud.retail.v2.CustomAttribute.text] or
+   * [numbers][google.cloud.retail.v2.CustomAttribute.numbers] should be set.
+   * Otherwise, an INVALID_ARGUMENT error is returned.
+   * </pre>
+   *
+   * <code>repeated string text = 1;</code>
+   *
+   * @return A list containing the text.
+   */
+  public com.google.protobuf.ProtocolStringList getTextList() {
+    return text_;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * The textual values of this custom attribute. For example, `["yellow",
+   * "green"]` when the key is "color".
+   * At most 400 values are allowed. Empty values are not allowed. Each value
+   * must be a UTF-8 encoded string with a length limit of 256 characters.
+   * Otherwise, an INVALID_ARGUMENT error is returned.
+   * Exactly one of [text][google.cloud.retail.v2.CustomAttribute.text] or
+   * [numbers][google.cloud.retail.v2.CustomAttribute.numbers] should be set.
+   * Otherwise, an INVALID_ARGUMENT error is returned.
+   * </pre>
+   *
+   * <code>repeated string text = 1;</code>
+   *
+   * @return The count of text.
+   */
+  public int getTextCount() {
+    return text_.size();
+  }
+  /**
+   *
+   *
+   * <pre>
+   * The textual values of this custom attribute. For example, `["yellow",
+   * "green"]` when the key is "color".
+   * At most 400 values are allowed. Empty values are not allowed. Each value
+   * must be a UTF-8 encoded string with a length limit of 256 characters.
+   * Otherwise, an INVALID_ARGUMENT error is returned.
+   * Exactly one of [text][google.cloud.retail.v2.CustomAttribute.text] or
+   * [numbers][google.cloud.retail.v2.CustomAttribute.numbers] should be set.
+   * Otherwise, an INVALID_ARGUMENT error is returned.
+   * </pre>
+   *
+   * <code>repeated string text = 1;</code>
+   *
+   * @param index The index of the element to return.
+   * @return The text at the given index.
+   */
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+    return text_.get(index);
+  }
+  /**
+   *
+   *
+   * <pre>
+   * The textual values of this custom attribute. For example, `["yellow",
+   * "green"]` when the key is "color".
+   * At most 400 values are allowed. Empty values are not allowed. Each value
+   * must be a UTF-8 encoded string with a length limit of 256 characters.
+   * Otherwise, an INVALID_ARGUMENT error is returned.
+   * Exactly one of [text][google.cloud.retail.v2.CustomAttribute.text] or
+   * [numbers][google.cloud.retail.v2.CustomAttribute.numbers] should be set.
+   * Otherwise, an INVALID_ARGUMENT error is returned.
+   * </pre>
+   *
+   * <code>repeated string text = 1;</code>
+   *
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+   * @return The bytes of the text at the given index.
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+  /**
+   *
+   *
+   * <pre>
+   * The numerical values of this custom attribute. For example, `[2.3, 15.4]`
+   * when the key is "lengths_cm".
+   * At most 400 values are allowed.Otherwise, an INVALID_ARGUMENT error is
+   * returned.
+   * Exactly one of [text][google.cloud.retail.v2.CustomAttribute.text] or
+   * [numbers][google.cloud.retail.v2.CustomAttribute.numbers] should be set.
+   * Otherwise, an INVALID_ARGUMENT error is returned.
+   * </pre>
+   *
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+   *
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+  }
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+   *
+   * <pre>
+   * The numerical values of this custom attribute. For example, `[2.3, 15.4]`
+   * when the key is "lengths_cm".
+   * At most 400 values are allowed.Otherwise, an INVALID_ARGUMENT error is
+   * returned.
+   * Exactly one of [text][google.cloud.retail.v2.CustomAttribute.text] or
+   * [numbers][google.cloud.retail.v2.CustomAttribute.numbers] should be set.
+   * Otherwise, an INVALID_ARGUMENT error is returned.
+   * </pre>
+   *
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+   *
+   *
+   * <pre>
+   * The numerical values of this custom attribute. For example, `[2.3, 15.4]`
+   * when the key is "lengths_cm".
+   * At most 400 values are allowed.Otherwise, an INVALID_ARGUMENT error is
+   * returned.
+   * Exactly one of [text][google.cloud.retail.v2.CustomAttribute.text] or
+   * [numbers][google.cloud.retail.v2.CustomAttribute.numbers] should be set.
+   * Otherwise, an INVALID_ARGUMENT error is returned.
+   * </pre>
+   *
+   * <code>repeated double numbers = 2;</code>
+   *
+   * @param index The index of the element to return.
+   * @return The numbers at the given index.
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+    return true;
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+  @java.lang.Override
+  public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
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+      output.writeUInt32NoTag(numbersMemoizedSerializedSize);
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+    for (int i = 0; i < numbers_.size(); i++) {
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+    }
+    unknownFields.writeTo(output);
+  }
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+  @java.lang.Override
+  public int getSerializedSize() {
+    int size = memoizedSize;
+    if (size != -1) return size;
+
+    size = 0;
+    {
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+      for (int i = 0; i < text_.size(); i++) {
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+      size += dataSize;
+      size += 1 * getTextList().size();
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+    size += unknownFields.getSerializedSize();
+    memoizedSize = size;
+    return size;
+  }
+
+  @java.lang.Override
+  public boolean equals(final java.lang.Object obj) {
+    if (obj == this) {
+      return true;
+    }
+    if (!(obj instanceof com.google.cloud.retail.v2.CustomAttribute)) {
+      return super.equals(obj);
+    }
+    com.google.cloud.retail.v2.CustomAttribute other =
+        (com.google.cloud.retail.v2.CustomAttribute) obj;
+
+    if (!getTextList().equals(other.getTextList())) return false;
+    if (!getNumbersList().equals(other.getNumbersList())) return false;
+    if (!unknownFields.equals(other.unknownFields)) return false;
+    return true;
+  }
+
+  @java.lang.Override
+  public int hashCode() {
+    if (memoizedHashCode != 0) {
+      return memoizedHashCode;
+    }
+    int hash = 41;
+    hash = (19 * hash) + getDescriptor().hashCode();
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+      hash = (53 * hash) + getTextList().hashCode();
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+      hash = (53 * hash) + getNumbersList().hashCode();
+    }
+    hash = (29 * hash) + unknownFields.hashCode();
+    memoizedHashCode = hash;
+    return hash;
+  }
+
+  public static com.google.cloud.retail.v2.CustomAttribute parseFrom(java.nio.ByteBuffer data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.CustomAttribute parseFrom(
+      java.nio.ByteBuffer data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.CustomAttribute parseFrom(
+      com.google.protobuf.ByteString data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.CustomAttribute parseFrom(
+      com.google.protobuf.ByteString data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.CustomAttribute parseFrom(byte[] data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.CustomAttribute parseFrom(
+      byte[] data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.CustomAttribute parseFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.CustomAttribute parseFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.CustomAttribute parseDelimitedFrom(
+      java.io.InputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.CustomAttribute parseDelimitedFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.CustomAttribute parseFrom(
+      com.google.protobuf.CodedInputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.CustomAttribute parseFrom(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  @java.lang.Override
+  public Builder newBuilderForType() {
+    return newBuilder();
+  }
+
+  public static Builder newBuilder() {
+    return DEFAULT_INSTANCE.toBuilder();
+  }
+
+  public static Builder newBuilder(com.google.cloud.retail.v2.CustomAttribute prototype) {
+    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+  }
+
+  @java.lang.Override
+  public Builder toBuilder() {
+    return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
+  }
+
+  @java.lang.Override
+  protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+    Builder builder = new Builder(parent);
+    return builder;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * A custom attribute that is not explicitly modeled in
+   * [Product][google.cloud.retail.v2.Product]].
+   * </pre>
+   *
+   * Protobuf type {@code google.cloud.retail.v2.CustomAttribute}
+   */
+  public static final class Builder extends com.google.protobuf.GeneratedMessageV3.Builder<Builder>
+      implements
+      // @@protoc_insertion_point(builder_implements:google.cloud.retail.v2.CustomAttribute)
+      com.google.cloud.retail.v2.CustomAttributeOrBuilder {
+    public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+      return com.google.cloud.retail.v2.CommonProto
+          .internal_static_google_cloud_retail_v2_CustomAttribute_descriptor;
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return com.google.cloud.retail.v2.CommonProto
+          .internal_static_google_cloud_retail_v2_CustomAttribute_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              com.google.cloud.retail.v2.CustomAttribute.class,
+              com.google.cloud.retail.v2.CustomAttribute.Builder.class);
+    }
+
+    // Construct using com.google.cloud.retail.v2.CustomAttribute.newBuilder()
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
+
+    private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+      super(parent);
+      maybeForceBuilderInitialization();
+    }
+
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders) {}
+    }
+
+    @java.lang.Override
+    public Builder clear() {
+      super.clear();
+      text_ = com.google.protobuf.LazyStringArrayList.EMPTY;
+      bitField0_ = (bitField0_ & ~0x00000001);
+      numbers_ = emptyDoubleList();
+      bitField0_ = (bitField0_ & ~0x00000002);
+      return this;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
+      return com.google.cloud.retail.v2.CommonProto
+          .internal_static_google_cloud_retail_v2_CustomAttribute_descriptor;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.CustomAttribute getDefaultInstanceForType() {
+      return com.google.cloud.retail.v2.CustomAttribute.getDefaultInstance();
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.CustomAttribute build() {
+      com.google.cloud.retail.v2.CustomAttribute result = buildPartial();
+      if (!result.isInitialized()) {
+        throw newUninitializedMessageException(result);
+      }
+      return result;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.CustomAttribute buildPartial() {
+      com.google.cloud.retail.v2.CustomAttribute result =
+          new com.google.cloud.retail.v2.CustomAttribute(this);
+      int from_bitField0_ = bitField0_;
+      if (((bitField0_ & 0x00000001) != 0)) {
+        text_ = text_.getUnmodifiableView();
+        bitField0_ = (bitField0_ & ~0x00000001);
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+      result.text_ = text_;
+      if (((bitField0_ & 0x00000002) != 0)) {
+        numbers_.makeImmutable();
+        bitField0_ = (bitField0_ & ~0x00000002);
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+      result.numbers_ = numbers_;
+      onBuilt();
+      return result;
+    }
+
+    @java.lang.Override
+    public Builder clone() {
+      return super.clone();
+    }
+
+    @java.lang.Override
+    public Builder setField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.setField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
+      return super.clearField(field);
+    }
+
+    @java.lang.Override
+    public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+      return super.clearOneof(oneof);
+    }
+
+    @java.lang.Override
+    public Builder setRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, int index, java.lang.Object value) {
+      return super.setRepeatedField(field, index, value);
+    }
+
+    @java.lang.Override
+    public Builder addRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.addRepeatedField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(com.google.protobuf.Message other) {
+      if (other instanceof com.google.cloud.retail.v2.CustomAttribute) {
+        return mergeFrom((com.google.cloud.retail.v2.CustomAttribute) other);
+      } else {
+        super.mergeFrom(other);
+        return this;
+      }
+    }
+
+    public Builder mergeFrom(com.google.cloud.retail.v2.CustomAttribute other) {
+      if (other == com.google.cloud.retail.v2.CustomAttribute.getDefaultInstance()) return this;
+      if (!other.text_.isEmpty()) {
+        if (text_.isEmpty()) {
+          text_ = other.text_;
+          bitField0_ = (bitField0_ & ~0x00000001);
+        } else {
+          ensureTextIsMutable();
+          text_.addAll(other.text_);
+        }
+        onChanged();
+      }
+      if (!other.numbers_.isEmpty()) {
+        if (numbers_.isEmpty()) {
+          numbers_ = other.numbers_;
+          bitField0_ = (bitField0_ & ~0x00000002);
+        } else {
+          ensureNumbersIsMutable();
+          numbers_.addAll(other.numbers_);
+        }
+        onChanged();
+      }
+      this.mergeUnknownFields(other.unknownFields);
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final boolean isInitialized() {
+      return true;
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      com.google.cloud.retail.v2.CustomAttribute parsedMessage = null;
+      try {
+        parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        parsedMessage = (com.google.cloud.retail.v2.CustomAttribute) e.getUnfinishedMessage();
+        throw e.unwrapIOException();
+      } finally {
+        if (parsedMessage != null) {
+          mergeFrom(parsedMessage);
+        }
+      }
+      return this;
+    }
+
+    private int bitField0_;
+
+    private com.google.protobuf.LazyStringList text_ =
+        com.google.protobuf.LazyStringArrayList.EMPTY;
+
+    private void ensureTextIsMutable() {
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+        text_ = new com.google.protobuf.LazyStringArrayList(text_);
+        bitField0_ |= 0x00000001;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The textual values of this custom attribute. For example, `["yellow",
+     * "green"]` when the key is "color".
+     * At most 400 values are allowed. Empty values are not allowed. Each value
+     * must be a UTF-8 encoded string with a length limit of 256 characters.
+     * Otherwise, an INVALID_ARGUMENT error is returned.
+     * Exactly one of [text][google.cloud.retail.v2.CustomAttribute.text] or
+     * [numbers][google.cloud.retail.v2.CustomAttribute.numbers] should be set.
+     * Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>repeated string text = 1;</code>
+     *
+     * @return A list containing the text.
+     */
+    public com.google.protobuf.ProtocolStringList getTextList() {
+      return text_.getUnmodifiableView();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The textual values of this custom attribute. For example, `["yellow",
+     * "green"]` when the key is "color".
+     * At most 400 values are allowed. Empty values are not allowed. Each value
+     * must be a UTF-8 encoded string with a length limit of 256 characters.
+     * Otherwise, an INVALID_ARGUMENT error is returned.
+     * Exactly one of [text][google.cloud.retail.v2.CustomAttribute.text] or
+     * [numbers][google.cloud.retail.v2.CustomAttribute.numbers] should be set.
+     * Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>repeated string text = 1;</code>
+     *
+     * @return The count of text.
+     */
+    public int getTextCount() {
+      return text_.size();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The textual values of this custom attribute. For example, `["yellow",
+     * "green"]` when the key is "color".
+     * At most 400 values are allowed. Empty values are not allowed. Each value
+     * must be a UTF-8 encoded string with a length limit of 256 characters.
+     * Otherwise, an INVALID_ARGUMENT error is returned.
+     * Exactly one of [text][google.cloud.retail.v2.CustomAttribute.text] or
+     * [numbers][google.cloud.retail.v2.CustomAttribute.numbers] should be set.
+     * Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>repeated string text = 1;</code>
+     *
+     * @param index The index of the element to return.
+     * @return The text at the given index.
+     */
+    public java.lang.String getText(int index) {
+      return text_.get(index);
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The textual values of this custom attribute. For example, `["yellow",
+     * "green"]` when the key is "color".
+     * At most 400 values are allowed. Empty values are not allowed. Each value
+     * must be a UTF-8 encoded string with a length limit of 256 characters.
+     * Otherwise, an INVALID_ARGUMENT error is returned.
+     * Exactly one of [text][google.cloud.retail.v2.CustomAttribute.text] or
+     * [numbers][google.cloud.retail.v2.CustomAttribute.numbers] should be set.
+     * Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>repeated string text = 1;</code>
+     *
+     * @param index The index of the value to return.
+     * @return The bytes of the text at the given index.
+     */
+    public com.google.protobuf.ByteString getTextBytes(int index) {
+      return text_.getByteString(index);
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The textual values of this custom attribute. For example, `["yellow",
+     * "green"]` when the key is "color".
+     * At most 400 values are allowed. Empty values are not allowed. Each value
+     * must be a UTF-8 encoded string with a length limit of 256 characters.
+     * Otherwise, an INVALID_ARGUMENT error is returned.
+     * Exactly one of [text][google.cloud.retail.v2.CustomAttribute.text] or
+     * [numbers][google.cloud.retail.v2.CustomAttribute.numbers] should be set.
+     * Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>repeated string text = 1;</code>
+     *
+     * @param index The index to set the value at.
+     * @param value The text to set.
+     * @return This builder for chaining.
+     */
+    public Builder setText(int index, java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      ensureTextIsMutable();
+      text_.set(index, value);
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The textual values of this custom attribute. For example, `["yellow",
+     * "green"]` when the key is "color".
+     * At most 400 values are allowed. Empty values are not allowed. Each value
+     * must be a UTF-8 encoded string with a length limit of 256 characters.
+     * Otherwise, an INVALID_ARGUMENT error is returned.
+     * Exactly one of [text][google.cloud.retail.v2.CustomAttribute.text] or
+     * [numbers][google.cloud.retail.v2.CustomAttribute.numbers] should be set.
+     * Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>repeated string text = 1;</code>
+     *
+     * @param value The text to add.
+     * @return This builder for chaining.
+     */
+    public Builder addText(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      ensureTextIsMutable();
+      text_.add(value);
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The textual values of this custom attribute. For example, `["yellow",
+     * "green"]` when the key is "color".
+     * At most 400 values are allowed. Empty values are not allowed. Each value
+     * must be a UTF-8 encoded string with a length limit of 256 characters.
+     * Otherwise, an INVALID_ARGUMENT error is returned.
+     * Exactly one of [text][google.cloud.retail.v2.CustomAttribute.text] or
+     * [numbers][google.cloud.retail.v2.CustomAttribute.numbers] should be set.
+     * Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>repeated string text = 1;</code>
+     *
+     * @param values The text to add.
+     * @return This builder for chaining.
+     */
+    public Builder addAllText(java.lang.Iterable<java.lang.String> values) {
+      ensureTextIsMutable();
+      com.google.protobuf.AbstractMessageLite.Builder.addAll(values, text_);
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The textual values of this custom attribute. For example, `["yellow",
+     * "green"]` when the key is "color".
+     * At most 400 values are allowed. Empty values are not allowed. Each value
+     * must be a UTF-8 encoded string with a length limit of 256 characters.
+     * Otherwise, an INVALID_ARGUMENT error is returned.
+     * Exactly one of [text][google.cloud.retail.v2.CustomAttribute.text] or
+     * [numbers][google.cloud.retail.v2.CustomAttribute.numbers] should be set.
+     * Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>repeated string text = 1;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearText() {
+      text_ = com.google.protobuf.LazyStringArrayList.EMPTY;
+      bitField0_ = (bitField0_ & ~0x00000001);
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The textual values of this custom attribute. For example, `["yellow",
+     * "green"]` when the key is "color".
+     * At most 400 values are allowed. Empty values are not allowed. Each value
+     * must be a UTF-8 encoded string with a length limit of 256 characters.
+     * Otherwise, an INVALID_ARGUMENT error is returned.
+     * Exactly one of [text][google.cloud.retail.v2.CustomAttribute.text] or
+     * [numbers][google.cloud.retail.v2.CustomAttribute.numbers] should be set.
+     * Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>repeated string text = 1;</code>
+     *
+     * @param value The bytes of the text to add.
+     * @return This builder for chaining.
+     */
+    public Builder addTextBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+      ensureTextIsMutable();
+      text_.add(value);
+      onChanged();
+      return this;
+    }
+
+    private com.google.protobuf.Internal.DoubleList numbers_ = emptyDoubleList();
+
+    private void ensureNumbersIsMutable() {
+      if (!((bitField0_ & 0x00000002) != 0)) {
+        numbers_ = mutableCopy(numbers_);
+        bitField0_ |= 0x00000002;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The numerical values of this custom attribute. For example, `[2.3, 15.4]`
+     * when the key is "lengths_cm".
+     * At most 400 values are allowed.Otherwise, an INVALID_ARGUMENT error is
+     * returned.
+     * Exactly one of [text][google.cloud.retail.v2.CustomAttribute.text] or
+     * [numbers][google.cloud.retail.v2.CustomAttribute.numbers] should be set.
+     * Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>repeated double numbers = 2;</code>
+     *
+     * @return A list containing the numbers.
+     */
+    public java.util.List<java.lang.Double> getNumbersList() {
+      return ((bitField0_ & 0x00000002) != 0)
+          ? java.util.Collections.unmodifiableList(numbers_)
+          : numbers_;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The numerical values of this custom attribute. For example, `[2.3, 15.4]`
+     * when the key is "lengths_cm".
+     * At most 400 values are allowed.Otherwise, an INVALID_ARGUMENT error is
+     * returned.
+     * Exactly one of [text][google.cloud.retail.v2.CustomAttribute.text] or
+     * [numbers][google.cloud.retail.v2.CustomAttribute.numbers] should be set.
+     * Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>repeated double numbers = 2;</code>
+     *
+     * @return The count of numbers.
+     */
+    public int getNumbersCount() {
+      return numbers_.size();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The numerical values of this custom attribute. For example, `[2.3, 15.4]`
+     * when the key is "lengths_cm".
+     * At most 400 values are allowed.Otherwise, an INVALID_ARGUMENT error is
+     * returned.
+     * Exactly one of [text][google.cloud.retail.v2.CustomAttribute.text] or
+     * [numbers][google.cloud.retail.v2.CustomAttribute.numbers] should be set.
+     * Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>repeated double numbers = 2;</code>
+     *
+     * @param index The index of the element to return.
+     * @return The numbers at the given index.
+     */
+    public double getNumbers(int index) {
+      return numbers_.getDouble(index);
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The numerical values of this custom attribute. For example, `[2.3, 15.4]`
+     * when the key is "lengths_cm".
+     * At most 400 values are allowed.Otherwise, an INVALID_ARGUMENT error is
+     * returned.
+     * Exactly one of [text][google.cloud.retail.v2.CustomAttribute.text] or
+     * [numbers][google.cloud.retail.v2.CustomAttribute.numbers] should be set.
+     * Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>repeated double numbers = 2;</code>
+     *
+     * @param index The index to set the value at.
+     * @param value The numbers to set.
+     * @return This builder for chaining.
+     */
+    public Builder setNumbers(int index, double value) {
+      ensureNumbersIsMutable();
+      numbers_.setDouble(index, value);
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The numerical values of this custom attribute. For example, `[2.3, 15.4]`
+     * when the key is "lengths_cm".
+     * At most 400 values are allowed.Otherwise, an INVALID_ARGUMENT error is
+     * returned.
+     * Exactly one of [text][google.cloud.retail.v2.CustomAttribute.text] or
+     * [numbers][google.cloud.retail.v2.CustomAttribute.numbers] should be set.
+     * Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>repeated double numbers = 2;</code>
+     *
+     * @param value The numbers to add.
+     * @return This builder for chaining.
+     */
+    public Builder addNumbers(double value) {
+      ensureNumbersIsMutable();
+      numbers_.addDouble(value);
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The numerical values of this custom attribute. For example, `[2.3, 15.4]`
+     * when the key is "lengths_cm".
+     * At most 400 values are allowed.Otherwise, an INVALID_ARGUMENT error is
+     * returned.
+     * Exactly one of [text][google.cloud.retail.v2.CustomAttribute.text] or
+     * [numbers][google.cloud.retail.v2.CustomAttribute.numbers] should be set.
+     * Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>repeated double numbers = 2;</code>
+     *
+     * @param values The numbers to add.
+     * @return This builder for chaining.
+     */
+    public Builder addAllNumbers(java.lang.Iterable<? extends java.lang.Double> values) {
+      ensureNumbersIsMutable();
+      com.google.protobuf.AbstractMessageLite.Builder.addAll(values, numbers_);
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The numerical values of this custom attribute. For example, `[2.3, 15.4]`
+     * when the key is "lengths_cm".
+     * At most 400 values are allowed.Otherwise, an INVALID_ARGUMENT error is
+     * returned.
+     * Exactly one of [text][google.cloud.retail.v2.CustomAttribute.text] or
+     * [numbers][google.cloud.retail.v2.CustomAttribute.numbers] should be set.
+     * Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>repeated double numbers = 2;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearNumbers() {
+      numbers_ = emptyDoubleList();
+      bitField0_ = (bitField0_ & ~0x00000002);
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.setUnknownFields(unknownFields);
+    }
+
+    @java.lang.Override
+    public final Builder mergeUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.mergeUnknownFields(unknownFields);
+    }
+
+    // @@protoc_insertion_point(builder_scope:google.cloud.retail.v2.CustomAttribute)
+  }
+
+  // @@protoc_insertion_point(class_scope:google.cloud.retail.v2.CustomAttribute)
+  private static final com.google.cloud.retail.v2.CustomAttribute DEFAULT_INSTANCE;
+
+  static {
+    DEFAULT_INSTANCE = new com.google.cloud.retail.v2.CustomAttribute();
+  }
+
+  public static com.google.cloud.retail.v2.CustomAttribute getDefaultInstance() {
+    return DEFAULT_INSTANCE;
+  }
+
+  private static final com.google.protobuf.Parser<CustomAttribute> PARSER =
+      new com.google.protobuf.AbstractParser<CustomAttribute>() {
+        @java.lang.Override
+        public CustomAttribute parsePartialFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws com.google.protobuf.InvalidProtocolBufferException {
+          return new CustomAttribute(input, extensionRegistry);
+        }
+      };
+
+  public static com.google.protobuf.Parser<CustomAttribute> parser() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.protobuf.Parser<CustomAttribute> getParserForType() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.cloud.retail.v2.CustomAttribute getDefaultInstanceForType() {
+    return DEFAULT_INSTANCE;
+  }
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/CustomAttributeOrBuilder.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/CustomAttributeOrBuilder.java
new file mode 100644
index 00000000..73b49c84
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/CustomAttributeOrBuilder.java
@@ -0,0 +1,160 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/common.proto
+
+package com.google.cloud.retail.v2;
+
+public interface CustomAttributeOrBuilder
+    extends
+    // @@protoc_insertion_point(interface_extends:google.cloud.retail.v2.CustomAttribute)
+    com.google.protobuf.MessageOrBuilder {
+
+  /**
+   *
+   *
+   * <pre>
+   * The textual values of this custom attribute. For example, `["yellow",
+   * "green"]` when the key is "color".
+   * At most 400 values are allowed. Empty values are not allowed. Each value
+   * must be a UTF-8 encoded string with a length limit of 256 characters.
+   * Otherwise, an INVALID_ARGUMENT error is returned.
+   * Exactly one of [text][google.cloud.retail.v2.CustomAttribute.text] or
+   * [numbers][google.cloud.retail.v2.CustomAttribute.numbers] should be set.
+   * Otherwise, an INVALID_ARGUMENT error is returned.
+   * </pre>
+   *
+   * <code>repeated string text = 1;</code>
+   *
+   * @return A list containing the text.
+   */
+  java.util.List<java.lang.String> getTextList();
+  /**
+   *
+   *
+   * <pre>
+   * The textual values of this custom attribute. For example, `["yellow",
+   * "green"]` when the key is "color".
+   * At most 400 values are allowed. Empty values are not allowed. Each value
+   * must be a UTF-8 encoded string with a length limit of 256 characters.
+   * Otherwise, an INVALID_ARGUMENT error is returned.
+   * Exactly one of [text][google.cloud.retail.v2.CustomAttribute.text] or
+   * [numbers][google.cloud.retail.v2.CustomAttribute.numbers] should be set.
+   * Otherwise, an INVALID_ARGUMENT error is returned.
+   * </pre>
+   *
+   * <code>repeated string text = 1;</code>
+   *
+   * @return The count of text.
+   */
+  int getTextCount();
+  /**
+   *
+   *
+   * <pre>
+   * The textual values of this custom attribute. For example, `["yellow",
+   * "green"]` when the key is "color".
+   * At most 400 values are allowed. Empty values are not allowed. Each value
+   * must be a UTF-8 encoded string with a length limit of 256 characters.
+   * Otherwise, an INVALID_ARGUMENT error is returned.
+   * Exactly one of [text][google.cloud.retail.v2.CustomAttribute.text] or
+   * [numbers][google.cloud.retail.v2.CustomAttribute.numbers] should be set.
+   * Otherwise, an INVALID_ARGUMENT error is returned.
+   * </pre>
+   *
+   * <code>repeated string text = 1;</code>
+   *
+   * @param index The index of the element to return.
+   * @return The text at the given index.
+   */
+  java.lang.String getText(int index);
+  /**
+   *
+   *
+   * <pre>
+   * The textual values of this custom attribute. For example, `["yellow",
+   * "green"]` when the key is "color".
+   * At most 400 values are allowed. Empty values are not allowed. Each value
+   * must be a UTF-8 encoded string with a length limit of 256 characters.
+   * Otherwise, an INVALID_ARGUMENT error is returned.
+   * Exactly one of [text][google.cloud.retail.v2.CustomAttribute.text] or
+   * [numbers][google.cloud.retail.v2.CustomAttribute.numbers] should be set.
+   * Otherwise, an INVALID_ARGUMENT error is returned.
+   * </pre>
+   *
+   * <code>repeated string text = 1;</code>
+   *
+   * @param index The index of the value to return.
+   * @return The bytes of the text at the given index.
+   */
+  com.google.protobuf.ByteString getTextBytes(int index);
+
+  /**
+   *
+   *
+   * <pre>
+   * The numerical values of this custom attribute. For example, `[2.3, 15.4]`
+   * when the key is "lengths_cm".
+   * At most 400 values are allowed.Otherwise, an INVALID_ARGUMENT error is
+   * returned.
+   * Exactly one of [text][google.cloud.retail.v2.CustomAttribute.text] or
+   * [numbers][google.cloud.retail.v2.CustomAttribute.numbers] should be set.
+   * Otherwise, an INVALID_ARGUMENT error is returned.
+   * </pre>
+   *
+   * <code>repeated double numbers = 2;</code>
+   *
+   * @return A list containing the numbers.
+   */
+  java.util.List<java.lang.Double> getNumbersList();
+  /**
+   *
+   *
+   * <pre>
+   * The numerical values of this custom attribute. For example, `[2.3, 15.4]`
+   * when the key is "lengths_cm".
+   * At most 400 values are allowed.Otherwise, an INVALID_ARGUMENT error is
+   * returned.
+   * Exactly one of [text][google.cloud.retail.v2.CustomAttribute.text] or
+   * [numbers][google.cloud.retail.v2.CustomAttribute.numbers] should be set.
+   * Otherwise, an INVALID_ARGUMENT error is returned.
+   * </pre>
+   *
+   * <code>repeated double numbers = 2;</code>
+   *
+   * @return The count of numbers.
+   */
+  int getNumbersCount();
+  /**
+   *
+   *
+   * <pre>
+   * The numerical values of this custom attribute. For example, `[2.3, 15.4]`
+   * when the key is "lengths_cm".
+   * At most 400 values are allowed.Otherwise, an INVALID_ARGUMENT error is
+   * returned.
+   * Exactly one of [text][google.cloud.retail.v2.CustomAttribute.text] or
+   * [numbers][google.cloud.retail.v2.CustomAttribute.numbers] should be set.
+   * Otherwise, an INVALID_ARGUMENT error is returned.
+   * </pre>
+   *
+   * <code>repeated double numbers = 2;</code>
+   *
+   * @param index The index of the element to return.
+   * @return The numbers at the given index.
+   */
+  double getNumbers(int index);
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/DeleteProductRequest.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/DeleteProductRequest.java
new file mode 100644
index 00000000..3c544868
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/DeleteProductRequest.java
@@ -0,0 +1,698 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/product_service.proto
+
+package com.google.cloud.retail.v2;
+
+/**
+ *
+ *
+ * <pre>
+ * Request message for [DeleteProduct][] method.
+ * </pre>
+ *
+ * Protobuf type {@code google.cloud.retail.v2.DeleteProductRequest}
+ */
+public final class DeleteProductRequest extends com.google.protobuf.GeneratedMessageV3
+    implements
+    // @@protoc_insertion_point(message_implements:google.cloud.retail.v2.DeleteProductRequest)
+    DeleteProductRequestOrBuilder {
+  private static final long serialVersionUID = 0L;
+  // Use DeleteProductRequest.newBuilder() to construct.
+  private DeleteProductRequest(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+    super(builder);
+  }
+
+  private DeleteProductRequest() {
+    name_ = "";
+  }
+
+  @java.lang.Override
+  @SuppressWarnings({"unused"})
+  protected java.lang.Object newInstance(UnusedPrivateParameter unused) {
+    return new DeleteProductRequest();
+  }
+
+  @java.lang.Override
+  public final com.google.protobuf.UnknownFieldSet getUnknownFields() {
+    return this.unknownFields;
+  }
+
+  private DeleteProductRequest(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    this();
+    if (extensionRegistry == null) {
+      throw new java.lang.NullPointerException();
+    }
+    com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+        com.google.protobuf.UnknownFieldSet.newBuilder();
+    try {
+      boolean done = false;
+      while (!done) {
+        int tag = input.readTag();
+        switch (tag) {
+          case 0:
+            done = true;
+            break;
+          case 10:
+            {
+              java.lang.String s = input.readStringRequireUtf8();
+
+              name_ = s;
+              break;
+            }
+          default:
+            {
+              if (!parseUnknownField(input, unknownFields, extensionRegistry, tag)) {
+                done = true;
+              }
+              break;
+            }
+        }
+      }
+    } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+      throw e.setUnfinishedMessage(this);
+    } catch (java.io.IOException e) {
+      throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
+    } finally {
+      this.unknownFields = unknownFields.build();
+      makeExtensionsImmutable();
+    }
+  }
+
+  public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+    return com.google.cloud.retail.v2.ProductServiceProto
+        .internal_static_google_cloud_retail_v2_DeleteProductRequest_descriptor;
+  }
+
+  @java.lang.Override
+  protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internalGetFieldAccessorTable() {
+    return com.google.cloud.retail.v2.ProductServiceProto
+        .internal_static_google_cloud_retail_v2_DeleteProductRequest_fieldAccessorTable
+        .ensureFieldAccessorsInitialized(
+            com.google.cloud.retail.v2.DeleteProductRequest.class,
+            com.google.cloud.retail.v2.DeleteProductRequest.Builder.class);
+  }
+
+  public static final int NAME_FIELD_NUMBER = 1;
+  private volatile java.lang.Object name_;
+  /**
+   *
+   *
+   * <pre>
+   * Required. Full resource name of [Product][google.cloud.retail.v2.Product],
+   * such as
+   * "projects/&#42;&#47;locations/global/catalogs/default_catalog/branches/default_branch/products/some_product_id".
+   * If the caller does not have permission to delete the
+   * [Product][google.cloud.retail.v2.Product], regardless of whether or not it
+   * exists, a PERMISSION_DENIED error is returned.
+   * If the [Product][google.cloud.retail.v2.Product] to delete does not exist,
+   * a NOT_FOUND error is returned.
+   * </pre>
+   *
+   * <code>
+   * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+   * </code>
+   *
+   * @return The name.
+   */
+  @java.lang.Override
+  public java.lang.String getName() {
+    java.lang.Object ref = name_;
+    if (ref instanceof java.lang.String) {
+      return (java.lang.String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+      java.lang.String s = bs.toStringUtf8();
+      name_ = s;
+      return s;
+    }
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Required. Full resource name of [Product][google.cloud.retail.v2.Product],
+   * such as
+   * "projects/&#42;&#47;locations/global/catalogs/default_catalog/branches/default_branch/products/some_product_id".
+   * If the caller does not have permission to delete the
+   * [Product][google.cloud.retail.v2.Product], regardless of whether or not it
+   * exists, a PERMISSION_DENIED error is returned.
+   * If the [Product][google.cloud.retail.v2.Product] to delete does not exist,
+   * a NOT_FOUND error is returned.
+   * </pre>
+   *
+   * <code>
+   * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+   * </code>
+   *
+   * @return The bytes for name.
+   */
+  @java.lang.Override
+  public com.google.protobuf.ByteString getNameBytes() {
+    java.lang.Object ref = name_;
+    if (ref instanceof java.lang.String) {
+      com.google.protobuf.ByteString b =
+          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+      name_ = b;
+      return b;
+    } else {
+      return (com.google.protobuf.ByteString) ref;
+    }
+  }
+
+  private byte memoizedIsInitialized = -1;
+
+  @java.lang.Override
+  public final boolean isInitialized() {
+    byte isInitialized = memoizedIsInitialized;
+    if (isInitialized == 1) return true;
+    if (isInitialized == 0) return false;
+
+    memoizedIsInitialized = 1;
+    return true;
+  }
+
+  @java.lang.Override
+  public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
+    if (!getNameBytes().isEmpty()) {
+      com.google.protobuf.GeneratedMessageV3.writeString(output, 1, name_);
+    }
+    unknownFields.writeTo(output);
+  }
+
+  @java.lang.Override
+  public int getSerializedSize() {
+    int size = memoizedSize;
+    if (size != -1) return size;
+
+    size = 0;
+    if (!getNameBytes().isEmpty()) {
+      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(1, name_);
+    }
+    size += unknownFields.getSerializedSize();
+    memoizedSize = size;
+    return size;
+  }
+
+  @java.lang.Override
+  public boolean equals(final java.lang.Object obj) {
+    if (obj == this) {
+      return true;
+    }
+    if (!(obj instanceof com.google.cloud.retail.v2.DeleteProductRequest)) {
+      return super.equals(obj);
+    }
+    com.google.cloud.retail.v2.DeleteProductRequest other =
+        (com.google.cloud.retail.v2.DeleteProductRequest) obj;
+
+    if (!getName().equals(other.getName())) return false;
+    if (!unknownFields.equals(other.unknownFields)) return false;
+    return true;
+  }
+
+  @java.lang.Override
+  public int hashCode() {
+    if (memoizedHashCode != 0) {
+      return memoizedHashCode;
+    }
+    int hash = 41;
+    hash = (19 * hash) + getDescriptor().hashCode();
+    hash = (37 * hash) + NAME_FIELD_NUMBER;
+    hash = (53 * hash) + getName().hashCode();
+    hash = (29 * hash) + unknownFields.hashCode();
+    memoizedHashCode = hash;
+    return hash;
+  }
+
+  public static com.google.cloud.retail.v2.DeleteProductRequest parseFrom(java.nio.ByteBuffer data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.DeleteProductRequest parseFrom(
+      java.nio.ByteBuffer data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.DeleteProductRequest parseFrom(
+      com.google.protobuf.ByteString data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.DeleteProductRequest parseFrom(
+      com.google.protobuf.ByteString data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.DeleteProductRequest parseFrom(byte[] data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.DeleteProductRequest parseFrom(
+      byte[] data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.DeleteProductRequest parseFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.DeleteProductRequest parseFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.DeleteProductRequest parseDelimitedFrom(
+      java.io.InputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.DeleteProductRequest parseDelimitedFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.DeleteProductRequest parseFrom(
+      com.google.protobuf.CodedInputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.DeleteProductRequest parseFrom(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  @java.lang.Override
+  public Builder newBuilderForType() {
+    return newBuilder();
+  }
+
+  public static Builder newBuilder() {
+    return DEFAULT_INSTANCE.toBuilder();
+  }
+
+  public static Builder newBuilder(com.google.cloud.retail.v2.DeleteProductRequest prototype) {
+    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+  }
+
+  @java.lang.Override
+  public Builder toBuilder() {
+    return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
+  }
+
+  @java.lang.Override
+  protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+    Builder builder = new Builder(parent);
+    return builder;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Request message for [DeleteProduct][] method.
+   * </pre>
+   *
+   * Protobuf type {@code google.cloud.retail.v2.DeleteProductRequest}
+   */
+  public static final class Builder extends com.google.protobuf.GeneratedMessageV3.Builder<Builder>
+      implements
+      // @@protoc_insertion_point(builder_implements:google.cloud.retail.v2.DeleteProductRequest)
+      com.google.cloud.retail.v2.DeleteProductRequestOrBuilder {
+    public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+      return com.google.cloud.retail.v2.ProductServiceProto
+          .internal_static_google_cloud_retail_v2_DeleteProductRequest_descriptor;
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return com.google.cloud.retail.v2.ProductServiceProto
+          .internal_static_google_cloud_retail_v2_DeleteProductRequest_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              com.google.cloud.retail.v2.DeleteProductRequest.class,
+              com.google.cloud.retail.v2.DeleteProductRequest.Builder.class);
+    }
+
+    // Construct using com.google.cloud.retail.v2.DeleteProductRequest.newBuilder()
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
+
+    private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+      super(parent);
+      maybeForceBuilderInitialization();
+    }
+
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders) {}
+    }
+
+    @java.lang.Override
+    public Builder clear() {
+      super.clear();
+      name_ = "";
+
+      return this;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
+      return com.google.cloud.retail.v2.ProductServiceProto
+          .internal_static_google_cloud_retail_v2_DeleteProductRequest_descriptor;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.DeleteProductRequest getDefaultInstanceForType() {
+      return com.google.cloud.retail.v2.DeleteProductRequest.getDefaultInstance();
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.DeleteProductRequest build() {
+      com.google.cloud.retail.v2.DeleteProductRequest result = buildPartial();
+      if (!result.isInitialized()) {
+        throw newUninitializedMessageException(result);
+      }
+      return result;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.DeleteProductRequest buildPartial() {
+      com.google.cloud.retail.v2.DeleteProductRequest result =
+          new com.google.cloud.retail.v2.DeleteProductRequest(this);
+      result.name_ = name_;
+      onBuilt();
+      return result;
+    }
+
+    @java.lang.Override
+    public Builder clone() {
+      return super.clone();
+    }
+
+    @java.lang.Override
+    public Builder setField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.setField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
+      return super.clearField(field);
+    }
+
+    @java.lang.Override
+    public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+      return super.clearOneof(oneof);
+    }
+
+    @java.lang.Override
+    public Builder setRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, int index, java.lang.Object value) {
+      return super.setRepeatedField(field, index, value);
+    }
+
+    @java.lang.Override
+    public Builder addRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.addRepeatedField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(com.google.protobuf.Message other) {
+      if (other instanceof com.google.cloud.retail.v2.DeleteProductRequest) {
+        return mergeFrom((com.google.cloud.retail.v2.DeleteProductRequest) other);
+      } else {
+        super.mergeFrom(other);
+        return this;
+      }
+    }
+
+    public Builder mergeFrom(com.google.cloud.retail.v2.DeleteProductRequest other) {
+      if (other == com.google.cloud.retail.v2.DeleteProductRequest.getDefaultInstance())
+        return this;
+      if (!other.getName().isEmpty()) {
+        name_ = other.name_;
+        onChanged();
+      }
+      this.mergeUnknownFields(other.unknownFields);
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final boolean isInitialized() {
+      return true;
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      com.google.cloud.retail.v2.DeleteProductRequest parsedMessage = null;
+      try {
+        parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        parsedMessage = (com.google.cloud.retail.v2.DeleteProductRequest) e.getUnfinishedMessage();
+        throw e.unwrapIOException();
+      } finally {
+        if (parsedMessage != null) {
+          mergeFrom(parsedMessage);
+        }
+      }
+      return this;
+    }
+
+    private java.lang.Object name_ = "";
+    /**
+     *
+     *
+     * <pre>
+     * Required. Full resource name of [Product][google.cloud.retail.v2.Product],
+     * such as
+     * "projects/&#42;&#47;locations/global/catalogs/default_catalog/branches/default_branch/products/some_product_id".
+     * If the caller does not have permission to delete the
+     * [Product][google.cloud.retail.v2.Product], regardless of whether or not it
+     * exists, a PERMISSION_DENIED error is returned.
+     * If the [Product][google.cloud.retail.v2.Product] to delete does not exist,
+     * a NOT_FOUND error is returned.
+     * </pre>
+     *
+     * <code>
+     * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * </code>
+     *
+     * @return The name.
+     */
+    public java.lang.String getName() {
+      java.lang.Object ref = name_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        name_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. Full resource name of [Product][google.cloud.retail.v2.Product],
+     * such as
+     * "projects/&#42;&#47;locations/global/catalogs/default_catalog/branches/default_branch/products/some_product_id".
+     * If the caller does not have permission to delete the
+     * [Product][google.cloud.retail.v2.Product], regardless of whether or not it
+     * exists, a PERMISSION_DENIED error is returned.
+     * If the [Product][google.cloud.retail.v2.Product] to delete does not exist,
+     * a NOT_FOUND error is returned.
+     * </pre>
+     *
+     * <code>
+     * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * </code>
+     *
+     * @return The bytes for name.
+     */
+    public com.google.protobuf.ByteString getNameBytes() {
+      java.lang.Object ref = name_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b =
+            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+        name_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. Full resource name of [Product][google.cloud.retail.v2.Product],
+     * such as
+     * "projects/&#42;&#47;locations/global/catalogs/default_catalog/branches/default_branch/products/some_product_id".
+     * If the caller does not have permission to delete the
+     * [Product][google.cloud.retail.v2.Product], regardless of whether or not it
+     * exists, a PERMISSION_DENIED error is returned.
+     * If the [Product][google.cloud.retail.v2.Product] to delete does not exist,
+     * a NOT_FOUND error is returned.
+     * </pre>
+     *
+     * <code>
+     * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * </code>
+     *
+     * @param value The name to set.
+     * @return This builder for chaining.
+     */
+    public Builder setName(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+
+      name_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. Full resource name of [Product][google.cloud.retail.v2.Product],
+     * such as
+     * "projects/&#42;&#47;locations/global/catalogs/default_catalog/branches/default_branch/products/some_product_id".
+     * If the caller does not have permission to delete the
+     * [Product][google.cloud.retail.v2.Product], regardless of whether or not it
+     * exists, a PERMISSION_DENIED error is returned.
+     * If the [Product][google.cloud.retail.v2.Product] to delete does not exist,
+     * a NOT_FOUND error is returned.
+     * </pre>
+     *
+     * <code>
+     * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * </code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearName() {
+
+      name_ = getDefaultInstance().getName();
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. Full resource name of [Product][google.cloud.retail.v2.Product],
+     * such as
+     * "projects/&#42;&#47;locations/global/catalogs/default_catalog/branches/default_branch/products/some_product_id".
+     * If the caller does not have permission to delete the
+     * [Product][google.cloud.retail.v2.Product], regardless of whether or not it
+     * exists, a PERMISSION_DENIED error is returned.
+     * If the [Product][google.cloud.retail.v2.Product] to delete does not exist,
+     * a NOT_FOUND error is returned.
+     * </pre>
+     *
+     * <code>
+     * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * </code>
+     *
+     * @param value The bytes for name to set.
+     * @return This builder for chaining.
+     */
+    public Builder setNameBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+
+      name_ = value;
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.setUnknownFields(unknownFields);
+    }
+
+    @java.lang.Override
+    public final Builder mergeUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.mergeUnknownFields(unknownFields);
+    }
+
+    // @@protoc_insertion_point(builder_scope:google.cloud.retail.v2.DeleteProductRequest)
+  }
+
+  // @@protoc_insertion_point(class_scope:google.cloud.retail.v2.DeleteProductRequest)
+  private static final com.google.cloud.retail.v2.DeleteProductRequest DEFAULT_INSTANCE;
+
+  static {
+    DEFAULT_INSTANCE = new com.google.cloud.retail.v2.DeleteProductRequest();
+  }
+
+  public static com.google.cloud.retail.v2.DeleteProductRequest getDefaultInstance() {
+    return DEFAULT_INSTANCE;
+  }
+
+  private static final com.google.protobuf.Parser<DeleteProductRequest> PARSER =
+      new com.google.protobuf.AbstractParser<DeleteProductRequest>() {
+        @java.lang.Override
+        public DeleteProductRequest parsePartialFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws com.google.protobuf.InvalidProtocolBufferException {
+          return new DeleteProductRequest(input, extensionRegistry);
+        }
+      };
+
+  public static com.google.protobuf.Parser<DeleteProductRequest> parser() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.protobuf.Parser<DeleteProductRequest> getParserForType() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.cloud.retail.v2.DeleteProductRequest getDefaultInstanceForType() {
+    return DEFAULT_INSTANCE;
+  }
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/DeleteProductRequestOrBuilder.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/DeleteProductRequestOrBuilder.java
new file mode 100644
index 00000000..7170d60c
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/DeleteProductRequestOrBuilder.java
@@ -0,0 +1,68 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/product_service.proto
+
+package com.google.cloud.retail.v2;
+
+public interface DeleteProductRequestOrBuilder
+    extends
+    // @@protoc_insertion_point(interface_extends:google.cloud.retail.v2.DeleteProductRequest)
+    com.google.protobuf.MessageOrBuilder {
+
+  /**
+   *
+   *
+   * <pre>
+   * Required. Full resource name of [Product][google.cloud.retail.v2.Product],
+   * such as
+   * "projects/&#42;&#47;locations/global/catalogs/default_catalog/branches/default_branch/products/some_product_id".
+   * If the caller does not have permission to delete the
+   * [Product][google.cloud.retail.v2.Product], regardless of whether or not it
+   * exists, a PERMISSION_DENIED error is returned.
+   * If the [Product][google.cloud.retail.v2.Product] to delete does not exist,
+   * a NOT_FOUND error is returned.
+   * </pre>
+   *
+   * <code>
+   * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+   * </code>
+   *
+   * @return The name.
+   */
+  java.lang.String getName();
+  /**
+   *
+   *
+   * <pre>
+   * Required. Full resource name of [Product][google.cloud.retail.v2.Product],
+   * such as
+   * "projects/&#42;&#47;locations/global/catalogs/default_catalog/branches/default_branch/products/some_product_id".
+   * If the caller does not have permission to delete the
+   * [Product][google.cloud.retail.v2.Product], regardless of whether or not it
+   * exists, a PERMISSION_DENIED error is returned.
+   * If the [Product][google.cloud.retail.v2.Product] to delete does not exist,
+   * a NOT_FOUND error is returned.
+   * </pre>
+   *
+   * <code>
+   * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+   * </code>
+   *
+   * @return The bytes for name.
+   */
+  com.google.protobuf.ByteString getNameBytes();
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/GcsSource.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/GcsSource.java
new file mode 100644
index 00000000..32c28dc3
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/GcsSource.java
@@ -0,0 +1,1068 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/import_config.proto
+
+package com.google.cloud.retail.v2;
+
+/**
+ *
+ *
+ * <pre>
+ * Google Cloud Storage location for input content.
+ * format.
+ * </pre>
+ *
+ * Protobuf type {@code google.cloud.retail.v2.GcsSource}
+ */
+public final class GcsSource extends com.google.protobuf.GeneratedMessageV3
+    implements
+    // @@protoc_insertion_point(message_implements:google.cloud.retail.v2.GcsSource)
+    GcsSourceOrBuilder {
+  private static final long serialVersionUID = 0L;
+  // Use GcsSource.newBuilder() to construct.
+  private GcsSource(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+    super(builder);
+  }
+
+  private GcsSource() {
+    inputUris_ = com.google.protobuf.LazyStringArrayList.EMPTY;
+    dataSchema_ = "";
+  }
+
+  @java.lang.Override
+  @SuppressWarnings({"unused"})
+  protected java.lang.Object newInstance(UnusedPrivateParameter unused) {
+    return new GcsSource();
+  }
+
+  @java.lang.Override
+  public final com.google.protobuf.UnknownFieldSet getUnknownFields() {
+    return this.unknownFields;
+  }
+
+  private GcsSource(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    this();
+    if (extensionRegistry == null) {
+      throw new java.lang.NullPointerException();
+    }
+    int mutable_bitField0_ = 0;
+    com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+        com.google.protobuf.UnknownFieldSet.newBuilder();
+    try {
+      boolean done = false;
+      while (!done) {
+        int tag = input.readTag();
+        switch (tag) {
+          case 0:
+            done = true;
+            break;
+          case 10:
+            {
+              java.lang.String s = input.readStringRequireUtf8();
+              if (!((mutable_bitField0_ & 0x00000001) != 0)) {
+                inputUris_ = new com.google.protobuf.LazyStringArrayList();
+                mutable_bitField0_ |= 0x00000001;
+              }
+              inputUris_.add(s);
+              break;
+            }
+          case 18:
+            {
+              java.lang.String s = input.readStringRequireUtf8();
+
+              dataSchema_ = s;
+              break;
+            }
+          default:
+            {
+              if (!parseUnknownField(input, unknownFields, extensionRegistry, tag)) {
+                done = true;
+              }
+              break;
+            }
+        }
+      }
+    } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+      throw e.setUnfinishedMessage(this);
+    } catch (java.io.IOException e) {
+      throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
+    } finally {
+      if (((mutable_bitField0_ & 0x00000001) != 0)) {
+        inputUris_ = inputUris_.getUnmodifiableView();
+      }
+      this.unknownFields = unknownFields.build();
+      makeExtensionsImmutable();
+    }
+  }
+
+  public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+    return com.google.cloud.retail.v2.ImportConfigProto
+        .internal_static_google_cloud_retail_v2_GcsSource_descriptor;
+  }
+
+  @java.lang.Override
+  protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internalGetFieldAccessorTable() {
+    return com.google.cloud.retail.v2.ImportConfigProto
+        .internal_static_google_cloud_retail_v2_GcsSource_fieldAccessorTable
+        .ensureFieldAccessorsInitialized(
+            com.google.cloud.retail.v2.GcsSource.class,
+            com.google.cloud.retail.v2.GcsSource.Builder.class);
+  }
+
+  public static final int INPUT_URIS_FIELD_NUMBER = 1;
+  private com.google.protobuf.LazyStringList inputUris_;
+  /**
+   *
+   *
+   * <pre>
+   * Required. Google Cloud Storage URIs to input files. URI can be up to
+   * 2000 characters long. URIs can match the full object path (for example,
+   * gs://bucket/directory/object.json) or a pattern matching one or more
+   * files, such as gs://bucket/directory/&#42;.json. A request can
+   * contain at most 100 files, and each file can be up to 2 GB. See
+   * [Importing product information](/recommendations-ai/docs/upload-catalog)
+   * for the expected file format and setup instructions.
+   * </pre>
+   *
+   * <code>repeated string input_uris = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return A list containing the inputUris.
+   */
+  public com.google.protobuf.ProtocolStringList getInputUrisList() {
+    return inputUris_;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Required. Google Cloud Storage URIs to input files. URI can be up to
+   * 2000 characters long. URIs can match the full object path (for example,
+   * gs://bucket/directory/object.json) or a pattern matching one or more
+   * files, such as gs://bucket/directory/&#42;.json. A request can
+   * contain at most 100 files, and each file can be up to 2 GB. See
+   * [Importing product information](/recommendations-ai/docs/upload-catalog)
+   * for the expected file format and setup instructions.
+   * </pre>
+   *
+   * <code>repeated string input_uris = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The count of inputUris.
+   */
+  public int getInputUrisCount() {
+    return inputUris_.size();
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Required. Google Cloud Storage URIs to input files. URI can be up to
+   * 2000 characters long. URIs can match the full object path (for example,
+   * gs://bucket/directory/object.json) or a pattern matching one or more
+   * files, such as gs://bucket/directory/&#42;.json. A request can
+   * contain at most 100 files, and each file can be up to 2 GB. See
+   * [Importing product information](/recommendations-ai/docs/upload-catalog)
+   * for the expected file format and setup instructions.
+   * </pre>
+   *
+   * <code>repeated string input_uris = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @param index The index of the element to return.
+   * @return The inputUris at the given index.
+   */
+  public java.lang.String getInputUris(int index) {
+    return inputUris_.get(index);
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Required. Google Cloud Storage URIs to input files. URI can be up to
+   * 2000 characters long. URIs can match the full object path (for example,
+   * gs://bucket/directory/object.json) or a pattern matching one or more
+   * files, such as gs://bucket/directory/&#42;.json. A request can
+   * contain at most 100 files, and each file can be up to 2 GB. See
+   * [Importing product information](/recommendations-ai/docs/upload-catalog)
+   * for the expected file format and setup instructions.
+   * </pre>
+   *
+   * <code>repeated string input_uris = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @param index The index of the value to return.
+   * @return The bytes of the inputUris at the given index.
+   */
+  public com.google.protobuf.ByteString getInputUrisBytes(int index) {
+    return inputUris_.getByteString(index);
+  }
+
+  public static final int DATA_SCHEMA_FIELD_NUMBER = 2;
+  private volatile java.lang.Object dataSchema_;
+  /**
+   *
+   *
+   * <pre>
+   * The schema to use when parsing the data from the source.
+   * Supported values for product imports:
+   * * `product` (default): One JSON [Product][google.cloud.retail.v2.Product]
+   * per line. Each product must
+   *   have a valid [Product.id][google.cloud.retail.v2.Product.id].
+   * * `product_merchant_center`: See [Importing catalog data from Merchant
+   *   Center](/retail/recommendations-ai/docs/upload-catalog#mc).
+   * Supported values for user events imports:
+   * * `user_event` (default): One JSON
+   * [UserEvent][google.cloud.retail.v2.UserEvent] per line.
+   * * `user_event_ga360`: Using
+   *   https://support.google.com/analytics/answer/3437719?hl=en.
+   * </pre>
+   *
+   * <code>string data_schema = 2;</code>
+   *
+   * @return The dataSchema.
+   */
+  @java.lang.Override
+  public java.lang.String getDataSchema() {
+    java.lang.Object ref = dataSchema_;
+    if (ref instanceof java.lang.String) {
+      return (java.lang.String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+      java.lang.String s = bs.toStringUtf8();
+      dataSchema_ = s;
+      return s;
+    }
+  }
+  /**
+   *
+   *
+   * <pre>
+   * The schema to use when parsing the data from the source.
+   * Supported values for product imports:
+   * * `product` (default): One JSON [Product][google.cloud.retail.v2.Product]
+   * per line. Each product must
+   *   have a valid [Product.id][google.cloud.retail.v2.Product.id].
+   * * `product_merchant_center`: See [Importing catalog data from Merchant
+   *   Center](/retail/recommendations-ai/docs/upload-catalog#mc).
+   * Supported values for user events imports:
+   * * `user_event` (default): One JSON
+   * [UserEvent][google.cloud.retail.v2.UserEvent] per line.
+   * * `user_event_ga360`: Using
+   *   https://support.google.com/analytics/answer/3437719?hl=en.
+   * </pre>
+   *
+   * <code>string data_schema = 2;</code>
+   *
+   * @return The bytes for dataSchema.
+   */
+  @java.lang.Override
+  public com.google.protobuf.ByteString getDataSchemaBytes() {
+    java.lang.Object ref = dataSchema_;
+    if (ref instanceof java.lang.String) {
+      com.google.protobuf.ByteString b =
+          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+      dataSchema_ = b;
+      return b;
+    } else {
+      return (com.google.protobuf.ByteString) ref;
+    }
+  }
+
+  private byte memoizedIsInitialized = -1;
+
+  @java.lang.Override
+  public final boolean isInitialized() {
+    byte isInitialized = memoizedIsInitialized;
+    if (isInitialized == 1) return true;
+    if (isInitialized == 0) return false;
+
+    memoizedIsInitialized = 1;
+    return true;
+  }
+
+  @java.lang.Override
+  public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
+    for (int i = 0; i < inputUris_.size(); i++) {
+      com.google.protobuf.GeneratedMessageV3.writeString(output, 1, inputUris_.getRaw(i));
+    }
+    if (!getDataSchemaBytes().isEmpty()) {
+      com.google.protobuf.GeneratedMessageV3.writeString(output, 2, dataSchema_);
+    }
+    unknownFields.writeTo(output);
+  }
+
+  @java.lang.Override
+  public int getSerializedSize() {
+    int size = memoizedSize;
+    if (size != -1) return size;
+
+    size = 0;
+    {
+      int dataSize = 0;
+      for (int i = 0; i < inputUris_.size(); i++) {
+        dataSize += computeStringSizeNoTag(inputUris_.getRaw(i));
+      }
+      size += dataSize;
+      size += 1 * getInputUrisList().size();
+    }
+    if (!getDataSchemaBytes().isEmpty()) {
+      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(2, dataSchema_);
+    }
+    size += unknownFields.getSerializedSize();
+    memoizedSize = size;
+    return size;
+  }
+
+  @java.lang.Override
+  public boolean equals(final java.lang.Object obj) {
+    if (obj == this) {
+      return true;
+    }
+    if (!(obj instanceof com.google.cloud.retail.v2.GcsSource)) {
+      return super.equals(obj);
+    }
+    com.google.cloud.retail.v2.GcsSource other = (com.google.cloud.retail.v2.GcsSource) obj;
+
+    if (!getInputUrisList().equals(other.getInputUrisList())) return false;
+    if (!getDataSchema().equals(other.getDataSchema())) return false;
+    if (!unknownFields.equals(other.unknownFields)) return false;
+    return true;
+  }
+
+  @java.lang.Override
+  public int hashCode() {
+    if (memoizedHashCode != 0) {
+      return memoizedHashCode;
+    }
+    int hash = 41;
+    hash = (19 * hash) + getDescriptor().hashCode();
+    if (getInputUrisCount() > 0) {
+      hash = (37 * hash) + INPUT_URIS_FIELD_NUMBER;
+      hash = (53 * hash) + getInputUrisList().hashCode();
+    }
+    hash = (37 * hash) + DATA_SCHEMA_FIELD_NUMBER;
+    hash = (53 * hash) + getDataSchema().hashCode();
+    hash = (29 * hash) + unknownFields.hashCode();
+    memoizedHashCode = hash;
+    return hash;
+  }
+
+  public static com.google.cloud.retail.v2.GcsSource parseFrom(java.nio.ByteBuffer data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.GcsSource parseFrom(
+      java.nio.ByteBuffer data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.GcsSource parseFrom(com.google.protobuf.ByteString data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.GcsSource parseFrom(
+      com.google.protobuf.ByteString data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.GcsSource parseFrom(byte[] data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.GcsSource parseFrom(
+      byte[] data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.GcsSource parseFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.GcsSource parseFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.GcsSource parseDelimitedFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.GcsSource parseDelimitedFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.GcsSource parseFrom(
+      com.google.protobuf.CodedInputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.GcsSource parseFrom(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  @java.lang.Override
+  public Builder newBuilderForType() {
+    return newBuilder();
+  }
+
+  public static Builder newBuilder() {
+    return DEFAULT_INSTANCE.toBuilder();
+  }
+
+  public static Builder newBuilder(com.google.cloud.retail.v2.GcsSource prototype) {
+    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+  }
+
+  @java.lang.Override
+  public Builder toBuilder() {
+    return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
+  }
+
+  @java.lang.Override
+  protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+    Builder builder = new Builder(parent);
+    return builder;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Google Cloud Storage location for input content.
+   * format.
+   * </pre>
+   *
+   * Protobuf type {@code google.cloud.retail.v2.GcsSource}
+   */
+  public static final class Builder extends com.google.protobuf.GeneratedMessageV3.Builder<Builder>
+      implements
+      // @@protoc_insertion_point(builder_implements:google.cloud.retail.v2.GcsSource)
+      com.google.cloud.retail.v2.GcsSourceOrBuilder {
+    public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+      return com.google.cloud.retail.v2.ImportConfigProto
+          .internal_static_google_cloud_retail_v2_GcsSource_descriptor;
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return com.google.cloud.retail.v2.ImportConfigProto
+          .internal_static_google_cloud_retail_v2_GcsSource_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              com.google.cloud.retail.v2.GcsSource.class,
+              com.google.cloud.retail.v2.GcsSource.Builder.class);
+    }
+
+    // Construct using com.google.cloud.retail.v2.GcsSource.newBuilder()
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
+
+    private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+      super(parent);
+      maybeForceBuilderInitialization();
+    }
+
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders) {}
+    }
+
+    @java.lang.Override
+    public Builder clear() {
+      super.clear();
+      inputUris_ = com.google.protobuf.LazyStringArrayList.EMPTY;
+      bitField0_ = (bitField0_ & ~0x00000001);
+      dataSchema_ = "";
+
+      return this;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
+      return com.google.cloud.retail.v2.ImportConfigProto
+          .internal_static_google_cloud_retail_v2_GcsSource_descriptor;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.GcsSource getDefaultInstanceForType() {
+      return com.google.cloud.retail.v2.GcsSource.getDefaultInstance();
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.GcsSource build() {
+      com.google.cloud.retail.v2.GcsSource result = buildPartial();
+      if (!result.isInitialized()) {
+        throw newUninitializedMessageException(result);
+      }
+      return result;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.GcsSource buildPartial() {
+      com.google.cloud.retail.v2.GcsSource result = new com.google.cloud.retail.v2.GcsSource(this);
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+      if (((bitField0_ & 0x00000001) != 0)) {
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+      result.inputUris_ = inputUris_;
+      result.dataSchema_ = dataSchema_;
+      onBuilt();
+      return result;
+    }
+
+    @java.lang.Override
+    public Builder clone() {
+      return super.clone();
+    }
+
+    @java.lang.Override
+    public Builder setField(
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+      return super.setField(field, value);
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+
+    @java.lang.Override
+    public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
+      return super.clearField(field);
+    }
+
+    @java.lang.Override
+    public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+      return super.clearOneof(oneof);
+    }
+
+    @java.lang.Override
+    public Builder setRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, int index, java.lang.Object value) {
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+
+    @java.lang.Override
+    public Builder addRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.addRepeatedField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(com.google.protobuf.Message other) {
+      if (other instanceof com.google.cloud.retail.v2.GcsSource) {
+        return mergeFrom((com.google.cloud.retail.v2.GcsSource) other);
+      } else {
+        super.mergeFrom(other);
+        return this;
+      }
+    }
+
+    public Builder mergeFrom(com.google.cloud.retail.v2.GcsSource other) {
+      if (other == com.google.cloud.retail.v2.GcsSource.getDefaultInstance()) return this;
+      if (!other.inputUris_.isEmpty()) {
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+          ensureInputUrisIsMutable();
+          inputUris_.addAll(other.inputUris_);
+        }
+        onChanged();
+      }
+      if (!other.getDataSchema().isEmpty()) {
+        dataSchema_ = other.dataSchema_;
+        onChanged();
+      }
+      this.mergeUnknownFields(other.unknownFields);
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final boolean isInitialized() {
+      return true;
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      com.google.cloud.retail.v2.GcsSource parsedMessage = null;
+      try {
+        parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        parsedMessage = (com.google.cloud.retail.v2.GcsSource) e.getUnfinishedMessage();
+        throw e.unwrapIOException();
+      } finally {
+        if (parsedMessage != null) {
+          mergeFrom(parsedMessage);
+        }
+      }
+      return this;
+    }
+
+    private int bitField0_;
+
+    private com.google.protobuf.LazyStringList inputUris_ =
+        com.google.protobuf.LazyStringArrayList.EMPTY;
+
+    private void ensureInputUrisIsMutable() {
+      if (!((bitField0_ & 0x00000001) != 0)) {
+        inputUris_ = new com.google.protobuf.LazyStringArrayList(inputUris_);
+        bitField0_ |= 0x00000001;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. Google Cloud Storage URIs to input files. URI can be up to
+     * 2000 characters long. URIs can match the full object path (for example,
+     * gs://bucket/directory/object.json) or a pattern matching one or more
+     * files, such as gs://bucket/directory/&#42;.json. A request can
+     * contain at most 100 files, and each file can be up to 2 GB. See
+     * [Importing product information](/recommendations-ai/docs/upload-catalog)
+     * for the expected file format and setup instructions.
+     * </pre>
+     *
+     * <code>repeated string input_uris = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @return A list containing the inputUris.
+     */
+    public com.google.protobuf.ProtocolStringList getInputUrisList() {
+      return inputUris_.getUnmodifiableView();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. Google Cloud Storage URIs to input files. URI can be up to
+     * 2000 characters long. URIs can match the full object path (for example,
+     * gs://bucket/directory/object.json) or a pattern matching one or more
+     * files, such as gs://bucket/directory/&#42;.json. A request can
+     * contain at most 100 files, and each file can be up to 2 GB. See
+     * [Importing product information](/recommendations-ai/docs/upload-catalog)
+     * for the expected file format and setup instructions.
+     * </pre>
+     *
+     * <code>repeated string input_uris = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @return The count of inputUris.
+     */
+    public int getInputUrisCount() {
+      return inputUris_.size();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. Google Cloud Storage URIs to input files. URI can be up to
+     * 2000 characters long. URIs can match the full object path (for example,
+     * gs://bucket/directory/object.json) or a pattern matching one or more
+     * files, such as gs://bucket/directory/&#42;.json. A request can
+     * contain at most 100 files, and each file can be up to 2 GB. See
+     * [Importing product information](/recommendations-ai/docs/upload-catalog)
+     * for the expected file format and setup instructions.
+     * </pre>
+     *
+     * <code>repeated string input_uris = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @param index The index of the element to return.
+     * @return The inputUris at the given index.
+     */
+    public java.lang.String getInputUris(int index) {
+      return inputUris_.get(index);
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. Google Cloud Storage URIs to input files. URI can be up to
+     * 2000 characters long. URIs can match the full object path (for example,
+     * gs://bucket/directory/object.json) or a pattern matching one or more
+     * files, such as gs://bucket/directory/&#42;.json. A request can
+     * contain at most 100 files, and each file can be up to 2 GB. See
+     * [Importing product information](/recommendations-ai/docs/upload-catalog)
+     * for the expected file format and setup instructions.
+     * </pre>
+     *
+     * <code>repeated string input_uris = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @param index The index of the value to return.
+     * @return The bytes of the inputUris at the given index.
+     */
+    public com.google.protobuf.ByteString getInputUrisBytes(int index) {
+      return inputUris_.getByteString(index);
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. Google Cloud Storage URIs to input files. URI can be up to
+     * 2000 characters long. URIs can match the full object path (for example,
+     * gs://bucket/directory/object.json) or a pattern matching one or more
+     * files, such as gs://bucket/directory/&#42;.json. A request can
+     * contain at most 100 files, and each file can be up to 2 GB. See
+     * [Importing product information](/recommendations-ai/docs/upload-catalog)
+     * for the expected file format and setup instructions.
+     * </pre>
+     *
+     * <code>repeated string input_uris = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @param index The index to set the value at.
+     * @param value The inputUris to set.
+     * @return This builder for chaining.
+     */
+    public Builder setInputUris(int index, java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      ensureInputUrisIsMutable();
+      inputUris_.set(index, value);
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. Google Cloud Storage URIs to input files. URI can be up to
+     * 2000 characters long. URIs can match the full object path (for example,
+     * gs://bucket/directory/object.json) or a pattern matching one or more
+     * files, such as gs://bucket/directory/&#42;.json. A request can
+     * contain at most 100 files, and each file can be up to 2 GB. See
+     * [Importing product information](/recommendations-ai/docs/upload-catalog)
+     * for the expected file format and setup instructions.
+     * </pre>
+     *
+     * <code>repeated string input_uris = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @param value The inputUris to add.
+     * @return This builder for chaining.
+     */
+    public Builder addInputUris(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      ensureInputUrisIsMutable();
+      inputUris_.add(value);
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. Google Cloud Storage URIs to input files. URI can be up to
+     * 2000 characters long. URIs can match the full object path (for example,
+     * gs://bucket/directory/object.json) or a pattern matching one or more
+     * files, such as gs://bucket/directory/&#42;.json. A request can
+     * contain at most 100 files, and each file can be up to 2 GB. See
+     * [Importing product information](/recommendations-ai/docs/upload-catalog)
+     * for the expected file format and setup instructions.
+     * </pre>
+     *
+     * <code>repeated string input_uris = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @param values The inputUris to add.
+     * @return This builder for chaining.
+     */
+    public Builder addAllInputUris(java.lang.Iterable<java.lang.String> values) {
+      ensureInputUrisIsMutable();
+      com.google.protobuf.AbstractMessageLite.Builder.addAll(values, inputUris_);
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. Google Cloud Storage URIs to input files. URI can be up to
+     * 2000 characters long. URIs can match the full object path (for example,
+     * gs://bucket/directory/object.json) or a pattern matching one or more
+     * files, such as gs://bucket/directory/&#42;.json. A request can
+     * contain at most 100 files, and each file can be up to 2 GB. See
+     * [Importing product information](/recommendations-ai/docs/upload-catalog)
+     * for the expected file format and setup instructions.
+     * </pre>
+     *
+     * <code>repeated string input_uris = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearInputUris() {
+      inputUris_ = com.google.protobuf.LazyStringArrayList.EMPTY;
+      bitField0_ = (bitField0_ & ~0x00000001);
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. Google Cloud Storage URIs to input files. URI can be up to
+     * 2000 characters long. URIs can match the full object path (for example,
+     * gs://bucket/directory/object.json) or a pattern matching one or more
+     * files, such as gs://bucket/directory/&#42;.json. A request can
+     * contain at most 100 files, and each file can be up to 2 GB. See
+     * [Importing product information](/recommendations-ai/docs/upload-catalog)
+     * for the expected file format and setup instructions.
+     * </pre>
+     *
+     * <code>repeated string input_uris = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @param value The bytes of the inputUris to add.
+     * @return This builder for chaining.
+     */
+    public Builder addInputUrisBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+      ensureInputUrisIsMutable();
+      inputUris_.add(value);
+      onChanged();
+      return this;
+    }
+
+    private java.lang.Object dataSchema_ = "";
+    /**
+     *
+     *
+     * <pre>
+     * The schema to use when parsing the data from the source.
+     * Supported values for product imports:
+     * * `product` (default): One JSON [Product][google.cloud.retail.v2.Product]
+     * per line. Each product must
+     *   have a valid [Product.id][google.cloud.retail.v2.Product.id].
+     * * `product_merchant_center`: See [Importing catalog data from Merchant
+     *   Center](/retail/recommendations-ai/docs/upload-catalog#mc).
+     * Supported values for user events imports:
+     * * `user_event` (default): One JSON
+     * [UserEvent][google.cloud.retail.v2.UserEvent] per line.
+     * * `user_event_ga360`: Using
+     *   https://support.google.com/analytics/answer/3437719?hl=en.
+     * </pre>
+     *
+     * <code>string data_schema = 2;</code>
+     *
+     * @return The dataSchema.
+     */
+    public java.lang.String getDataSchema() {
+      java.lang.Object ref = dataSchema_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        dataSchema_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The schema to use when parsing the data from the source.
+     * Supported values for product imports:
+     * * `product` (default): One JSON [Product][google.cloud.retail.v2.Product]
+     * per line. Each product must
+     *   have a valid [Product.id][google.cloud.retail.v2.Product.id].
+     * * `product_merchant_center`: See [Importing catalog data from Merchant
+     *   Center](/retail/recommendations-ai/docs/upload-catalog#mc).
+     * Supported values for user events imports:
+     * * `user_event` (default): One JSON
+     * [UserEvent][google.cloud.retail.v2.UserEvent] per line.
+     * * `user_event_ga360`: Using
+     *   https://support.google.com/analytics/answer/3437719?hl=en.
+     * </pre>
+     *
+     * <code>string data_schema = 2;</code>
+     *
+     * @return The bytes for dataSchema.
+     */
+    public com.google.protobuf.ByteString getDataSchemaBytes() {
+      java.lang.Object ref = dataSchema_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b =
+            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+        dataSchema_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The schema to use when parsing the data from the source.
+     * Supported values for product imports:
+     * * `product` (default): One JSON [Product][google.cloud.retail.v2.Product]
+     * per line. Each product must
+     *   have a valid [Product.id][google.cloud.retail.v2.Product.id].
+     * * `product_merchant_center`: See [Importing catalog data from Merchant
+     *   Center](/retail/recommendations-ai/docs/upload-catalog#mc).
+     * Supported values for user events imports:
+     * * `user_event` (default): One JSON
+     * [UserEvent][google.cloud.retail.v2.UserEvent] per line.
+     * * `user_event_ga360`: Using
+     *   https://support.google.com/analytics/answer/3437719?hl=en.
+     * </pre>
+     *
+     * <code>string data_schema = 2;</code>
+     *
+     * @param value The dataSchema to set.
+     * @return This builder for chaining.
+     */
+    public Builder setDataSchema(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+
+      dataSchema_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The schema to use when parsing the data from the source.
+     * Supported values for product imports:
+     * * `product` (default): One JSON [Product][google.cloud.retail.v2.Product]
+     * per line. Each product must
+     *   have a valid [Product.id][google.cloud.retail.v2.Product.id].
+     * * `product_merchant_center`: See [Importing catalog data from Merchant
+     *   Center](/retail/recommendations-ai/docs/upload-catalog#mc).
+     * Supported values for user events imports:
+     * * `user_event` (default): One JSON
+     * [UserEvent][google.cloud.retail.v2.UserEvent] per line.
+     * * `user_event_ga360`: Using
+     *   https://support.google.com/analytics/answer/3437719?hl=en.
+     * </pre>
+     *
+     * <code>string data_schema = 2;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearDataSchema() {
+
+      dataSchema_ = getDefaultInstance().getDataSchema();
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The schema to use when parsing the data from the source.
+     * Supported values for product imports:
+     * * `product` (default): One JSON [Product][google.cloud.retail.v2.Product]
+     * per line. Each product must
+     *   have a valid [Product.id][google.cloud.retail.v2.Product.id].
+     * * `product_merchant_center`: See [Importing catalog data from Merchant
+     *   Center](/retail/recommendations-ai/docs/upload-catalog#mc).
+     * Supported values for user events imports:
+     * * `user_event` (default): One JSON
+     * [UserEvent][google.cloud.retail.v2.UserEvent] per line.
+     * * `user_event_ga360`: Using
+     *   https://support.google.com/analytics/answer/3437719?hl=en.
+     * </pre>
+     *
+     * <code>string data_schema = 2;</code>
+     *
+     * @param value The bytes for dataSchema to set.
+     * @return This builder for chaining.
+     */
+    public Builder setDataSchemaBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+
+      dataSchema_ = value;
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.setUnknownFields(unknownFields);
+    }
+
+    @java.lang.Override
+    public final Builder mergeUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.mergeUnknownFields(unknownFields);
+    }
+
+    // @@protoc_insertion_point(builder_scope:google.cloud.retail.v2.GcsSource)
+  }
+
+  // @@protoc_insertion_point(class_scope:google.cloud.retail.v2.GcsSource)
+  private static final com.google.cloud.retail.v2.GcsSource DEFAULT_INSTANCE;
+
+  static {
+    DEFAULT_INSTANCE = new com.google.cloud.retail.v2.GcsSource();
+  }
+
+  public static com.google.cloud.retail.v2.GcsSource getDefaultInstance() {
+    return DEFAULT_INSTANCE;
+  }
+
+  private static final com.google.protobuf.Parser<GcsSource> PARSER =
+      new com.google.protobuf.AbstractParser<GcsSource>() {
+        @java.lang.Override
+        public GcsSource parsePartialFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws com.google.protobuf.InvalidProtocolBufferException {
+          return new GcsSource(input, extensionRegistry);
+        }
+      };
+
+  public static com.google.protobuf.Parser<GcsSource> parser() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.protobuf.Parser<GcsSource> getParserForType() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.cloud.retail.v2.GcsSource getDefaultInstanceForType() {
+    return DEFAULT_INSTANCE;
+  }
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/GcsSourceOrBuilder.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/GcsSourceOrBuilder.java
new file mode 100644
index 00000000..2ac80327
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/GcsSourceOrBuilder.java
@@ -0,0 +1,147 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/import_config.proto
+
+package com.google.cloud.retail.v2;
+
+public interface GcsSourceOrBuilder
+    extends
+    // @@protoc_insertion_point(interface_extends:google.cloud.retail.v2.GcsSource)
+    com.google.protobuf.MessageOrBuilder {
+
+  /**
+   *
+   *
+   * <pre>
+   * Required. Google Cloud Storage URIs to input files. URI can be up to
+   * 2000 characters long. URIs can match the full object path (for example,
+   * gs://bucket/directory/object.json) or a pattern matching one or more
+   * files, such as gs://bucket/directory/&#42;.json. A request can
+   * contain at most 100 files, and each file can be up to 2 GB. See
+   * [Importing product information](/recommendations-ai/docs/upload-catalog)
+   * for the expected file format and setup instructions.
+   * </pre>
+   *
+   * <code>repeated string input_uris = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return A list containing the inputUris.
+   */
+  java.util.List<java.lang.String> getInputUrisList();
+  /**
+   *
+   *
+   * <pre>
+   * Required. Google Cloud Storage URIs to input files. URI can be up to
+   * 2000 characters long. URIs can match the full object path (for example,
+   * gs://bucket/directory/object.json) or a pattern matching one or more
+   * files, such as gs://bucket/directory/&#42;.json. A request can
+   * contain at most 100 files, and each file can be up to 2 GB. See
+   * [Importing product information](/recommendations-ai/docs/upload-catalog)
+   * for the expected file format and setup instructions.
+   * </pre>
+   *
+   * <code>repeated string input_uris = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The count of inputUris.
+   */
+  int getInputUrisCount();
+  /**
+   *
+   *
+   * <pre>
+   * Required. Google Cloud Storage URIs to input files. URI can be up to
+   * 2000 characters long. URIs can match the full object path (for example,
+   * gs://bucket/directory/object.json) or a pattern matching one or more
+   * files, such as gs://bucket/directory/&#42;.json. A request can
+   * contain at most 100 files, and each file can be up to 2 GB. See
+   * [Importing product information](/recommendations-ai/docs/upload-catalog)
+   * for the expected file format and setup instructions.
+   * </pre>
+   *
+   * <code>repeated string input_uris = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @param index The index of the element to return.
+   * @return The inputUris at the given index.
+   */
+  java.lang.String getInputUris(int index);
+  /**
+   *
+   *
+   * <pre>
+   * Required. Google Cloud Storage URIs to input files. URI can be up to
+   * 2000 characters long. URIs can match the full object path (for example,
+   * gs://bucket/directory/object.json) or a pattern matching one or more
+   * files, such as gs://bucket/directory/&#42;.json. A request can
+   * contain at most 100 files, and each file can be up to 2 GB. See
+   * [Importing product information](/recommendations-ai/docs/upload-catalog)
+   * for the expected file format and setup instructions.
+   * </pre>
+   *
+   * <code>repeated string input_uris = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @param index The index of the value to return.
+   * @return The bytes of the inputUris at the given index.
+   */
+  com.google.protobuf.ByteString getInputUrisBytes(int index);
+
+  /**
+   *
+   *
+   * <pre>
+   * The schema to use when parsing the data from the source.
+   * Supported values for product imports:
+   * * `product` (default): One JSON [Product][google.cloud.retail.v2.Product]
+   * per line. Each product must
+   *   have a valid [Product.id][google.cloud.retail.v2.Product.id].
+   * * `product_merchant_center`: See [Importing catalog data from Merchant
+   *   Center](/retail/recommendations-ai/docs/upload-catalog#mc).
+   * Supported values for user events imports:
+   * * `user_event` (default): One JSON
+   * [UserEvent][google.cloud.retail.v2.UserEvent] per line.
+   * * `user_event_ga360`: Using
+   *   https://support.google.com/analytics/answer/3437719?hl=en.
+   * </pre>
+   *
+   * <code>string data_schema = 2;</code>
+   *
+   * @return The dataSchema.
+   */
+  java.lang.String getDataSchema();
+  /**
+   *
+   *
+   * <pre>
+   * The schema to use when parsing the data from the source.
+   * Supported values for product imports:
+   * * `product` (default): One JSON [Product][google.cloud.retail.v2.Product]
+   * per line. Each product must
+   *   have a valid [Product.id][google.cloud.retail.v2.Product.id].
+   * * `product_merchant_center`: See [Importing catalog data from Merchant
+   *   Center](/retail/recommendations-ai/docs/upload-catalog#mc).
+   * Supported values for user events imports:
+   * * `user_event` (default): One JSON
+   * [UserEvent][google.cloud.retail.v2.UserEvent] per line.
+   * * `user_event_ga360`: Using
+   *   https://support.google.com/analytics/answer/3437719?hl=en.
+   * </pre>
+   *
+   * <code>string data_schema = 2;</code>
+   *
+   * @return The bytes for dataSchema.
+   */
+  com.google.protobuf.ByteString getDataSchemaBytes();
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/GetProductRequest.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/GetProductRequest.java
new file mode 100644
index 00000000..a233d474
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/GetProductRequest.java
@@ -0,0 +1,697 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/product_service.proto
+
+package com.google.cloud.retail.v2;
+
+/**
+ *
+ *
+ * <pre>
+ * Request message for [GetProduct][] method.
+ * </pre>
+ *
+ * Protobuf type {@code google.cloud.retail.v2.GetProductRequest}
+ */
+public final class GetProductRequest extends com.google.protobuf.GeneratedMessageV3
+    implements
+    // @@protoc_insertion_point(message_implements:google.cloud.retail.v2.GetProductRequest)
+    GetProductRequestOrBuilder {
+  private static final long serialVersionUID = 0L;
+  // Use GetProductRequest.newBuilder() to construct.
+  private GetProductRequest(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+    super(builder);
+  }
+
+  private GetProductRequest() {
+    name_ = "";
+  }
+
+  @java.lang.Override
+  @SuppressWarnings({"unused"})
+  protected java.lang.Object newInstance(UnusedPrivateParameter unused) {
+    return new GetProductRequest();
+  }
+
+  @java.lang.Override
+  public final com.google.protobuf.UnknownFieldSet getUnknownFields() {
+    return this.unknownFields;
+  }
+
+  private GetProductRequest(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    this();
+    if (extensionRegistry == null) {
+      throw new java.lang.NullPointerException();
+    }
+    com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+        com.google.protobuf.UnknownFieldSet.newBuilder();
+    try {
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+      while (!done) {
+        int tag = input.readTag();
+        switch (tag) {
+          case 0:
+            done = true;
+            break;
+          case 10:
+            {
+              java.lang.String s = input.readStringRequireUtf8();
+
+              name_ = s;
+              break;
+            }
+          default:
+            {
+              if (!parseUnknownField(input, unknownFields, extensionRegistry, tag)) {
+                done = true;
+              }
+              break;
+            }
+        }
+      }
+    } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+      throw e.setUnfinishedMessage(this);
+    } catch (java.io.IOException e) {
+      throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
+    } finally {
+      this.unknownFields = unknownFields.build();
+      makeExtensionsImmutable();
+    }
+  }
+
+  public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+    return com.google.cloud.retail.v2.ProductServiceProto
+        .internal_static_google_cloud_retail_v2_GetProductRequest_descriptor;
+  }
+
+  @java.lang.Override
+  protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internalGetFieldAccessorTable() {
+    return com.google.cloud.retail.v2.ProductServiceProto
+        .internal_static_google_cloud_retail_v2_GetProductRequest_fieldAccessorTable
+        .ensureFieldAccessorsInitialized(
+            com.google.cloud.retail.v2.GetProductRequest.class,
+            com.google.cloud.retail.v2.GetProductRequest.Builder.class);
+  }
+
+  public static final int NAME_FIELD_NUMBER = 1;
+  private volatile java.lang.Object name_;
+  /**
+   *
+   *
+   * <pre>
+   * Required. Full resource name of [Product][google.cloud.retail.v2.Product],
+   * such as
+   * "projects/&#42;&#47;locations/global/catalogs/default_catalog/branches/default_branch/products/some_product_id".
+   * If the caller does not have permission to access the
+   * [Product][google.cloud.retail.v2.Product], regardless of whether or not it
+   * exists, a PERMISSION_DENIED error is returned.
+   * If the requested [Product][google.cloud.retail.v2.Product] does not exist,
+   * a NOT_FOUND error is returned.
+   * </pre>
+   *
+   * <code>
+   * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+   * </code>
+   *
+   * @return The name.
+   */
+  @java.lang.Override
+  public java.lang.String getName() {
+    java.lang.Object ref = name_;
+    if (ref instanceof java.lang.String) {
+      return (java.lang.String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+      java.lang.String s = bs.toStringUtf8();
+      name_ = s;
+      return s;
+    }
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Required. Full resource name of [Product][google.cloud.retail.v2.Product],
+   * such as
+   * "projects/&#42;&#47;locations/global/catalogs/default_catalog/branches/default_branch/products/some_product_id".
+   * If the caller does not have permission to access the
+   * [Product][google.cloud.retail.v2.Product], regardless of whether or not it
+   * exists, a PERMISSION_DENIED error is returned.
+   * If the requested [Product][google.cloud.retail.v2.Product] does not exist,
+   * a NOT_FOUND error is returned.
+   * </pre>
+   *
+   * <code>
+   * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+   * </code>
+   *
+   * @return The bytes for name.
+   */
+  @java.lang.Override
+  public com.google.protobuf.ByteString getNameBytes() {
+    java.lang.Object ref = name_;
+    if (ref instanceof java.lang.String) {
+      com.google.protobuf.ByteString b =
+          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+      name_ = b;
+      return b;
+    } else {
+      return (com.google.protobuf.ByteString) ref;
+    }
+  }
+
+  private byte memoizedIsInitialized = -1;
+
+  @java.lang.Override
+  public final boolean isInitialized() {
+    byte isInitialized = memoizedIsInitialized;
+    if (isInitialized == 1) return true;
+    if (isInitialized == 0) return false;
+
+    memoizedIsInitialized = 1;
+    return true;
+  }
+
+  @java.lang.Override
+  public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
+    if (!getNameBytes().isEmpty()) {
+      com.google.protobuf.GeneratedMessageV3.writeString(output, 1, name_);
+    }
+    unknownFields.writeTo(output);
+  }
+
+  @java.lang.Override
+  public int getSerializedSize() {
+    int size = memoizedSize;
+    if (size != -1) return size;
+
+    size = 0;
+    if (!getNameBytes().isEmpty()) {
+      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(1, name_);
+    }
+    size += unknownFields.getSerializedSize();
+    memoizedSize = size;
+    return size;
+  }
+
+  @java.lang.Override
+  public boolean equals(final java.lang.Object obj) {
+    if (obj == this) {
+      return true;
+    }
+    if (!(obj instanceof com.google.cloud.retail.v2.GetProductRequest)) {
+      return super.equals(obj);
+    }
+    com.google.cloud.retail.v2.GetProductRequest other =
+        (com.google.cloud.retail.v2.GetProductRequest) obj;
+
+    if (!getName().equals(other.getName())) return false;
+    if (!unknownFields.equals(other.unknownFields)) return false;
+    return true;
+  }
+
+  @java.lang.Override
+  public int hashCode() {
+    if (memoizedHashCode != 0) {
+      return memoizedHashCode;
+    }
+    int hash = 41;
+    hash = (19 * hash) + getDescriptor().hashCode();
+    hash = (37 * hash) + NAME_FIELD_NUMBER;
+    hash = (53 * hash) + getName().hashCode();
+    hash = (29 * hash) + unknownFields.hashCode();
+    memoizedHashCode = hash;
+    return hash;
+  }
+
+  public static com.google.cloud.retail.v2.GetProductRequest parseFrom(java.nio.ByteBuffer data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.GetProductRequest parseFrom(
+      java.nio.ByteBuffer data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.GetProductRequest parseFrom(
+      com.google.protobuf.ByteString data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.GetProductRequest parseFrom(
+      com.google.protobuf.ByteString data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.GetProductRequest parseFrom(byte[] data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.GetProductRequest parseFrom(
+      byte[] data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.GetProductRequest parseFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.GetProductRequest parseFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.GetProductRequest parseDelimitedFrom(
+      java.io.InputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.GetProductRequest parseDelimitedFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.GetProductRequest parseFrom(
+      com.google.protobuf.CodedInputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.GetProductRequest parseFrom(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  @java.lang.Override
+  public Builder newBuilderForType() {
+    return newBuilder();
+  }
+
+  public static Builder newBuilder() {
+    return DEFAULT_INSTANCE.toBuilder();
+  }
+
+  public static Builder newBuilder(com.google.cloud.retail.v2.GetProductRequest prototype) {
+    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+  }
+
+  @java.lang.Override
+  public Builder toBuilder() {
+    return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
+  }
+
+  @java.lang.Override
+  protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+    Builder builder = new Builder(parent);
+    return builder;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Request message for [GetProduct][] method.
+   * </pre>
+   *
+   * Protobuf type {@code google.cloud.retail.v2.GetProductRequest}
+   */
+  public static final class Builder extends com.google.protobuf.GeneratedMessageV3.Builder<Builder>
+      implements
+      // @@protoc_insertion_point(builder_implements:google.cloud.retail.v2.GetProductRequest)
+      com.google.cloud.retail.v2.GetProductRequestOrBuilder {
+    public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+      return com.google.cloud.retail.v2.ProductServiceProto
+          .internal_static_google_cloud_retail_v2_GetProductRequest_descriptor;
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return com.google.cloud.retail.v2.ProductServiceProto
+          .internal_static_google_cloud_retail_v2_GetProductRequest_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              com.google.cloud.retail.v2.GetProductRequest.class,
+              com.google.cloud.retail.v2.GetProductRequest.Builder.class);
+    }
+
+    // Construct using com.google.cloud.retail.v2.GetProductRequest.newBuilder()
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
+
+    private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+      super(parent);
+      maybeForceBuilderInitialization();
+    }
+
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders) {}
+    }
+
+    @java.lang.Override
+    public Builder clear() {
+      super.clear();
+      name_ = "";
+
+      return this;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
+      return com.google.cloud.retail.v2.ProductServiceProto
+          .internal_static_google_cloud_retail_v2_GetProductRequest_descriptor;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.GetProductRequest getDefaultInstanceForType() {
+      return com.google.cloud.retail.v2.GetProductRequest.getDefaultInstance();
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.GetProductRequest build() {
+      com.google.cloud.retail.v2.GetProductRequest result = buildPartial();
+      if (!result.isInitialized()) {
+        throw newUninitializedMessageException(result);
+      }
+      return result;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.GetProductRequest buildPartial() {
+      com.google.cloud.retail.v2.GetProductRequest result =
+          new com.google.cloud.retail.v2.GetProductRequest(this);
+      result.name_ = name_;
+      onBuilt();
+      return result;
+    }
+
+    @java.lang.Override
+    public Builder clone() {
+      return super.clone();
+    }
+
+    @java.lang.Override
+    public Builder setField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.setField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
+      return super.clearField(field);
+    }
+
+    @java.lang.Override
+    public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+      return super.clearOneof(oneof);
+    }
+
+    @java.lang.Override
+    public Builder setRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, int index, java.lang.Object value) {
+      return super.setRepeatedField(field, index, value);
+    }
+
+    @java.lang.Override
+    public Builder addRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.addRepeatedField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(com.google.protobuf.Message other) {
+      if (other instanceof com.google.cloud.retail.v2.GetProductRequest) {
+        return mergeFrom((com.google.cloud.retail.v2.GetProductRequest) other);
+      } else {
+        super.mergeFrom(other);
+        return this;
+      }
+    }
+
+    public Builder mergeFrom(com.google.cloud.retail.v2.GetProductRequest other) {
+      if (other == com.google.cloud.retail.v2.GetProductRequest.getDefaultInstance()) return this;
+      if (!other.getName().isEmpty()) {
+        name_ = other.name_;
+        onChanged();
+      }
+      this.mergeUnknownFields(other.unknownFields);
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final boolean isInitialized() {
+      return true;
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      com.google.cloud.retail.v2.GetProductRequest parsedMessage = null;
+      try {
+        parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        parsedMessage = (com.google.cloud.retail.v2.GetProductRequest) e.getUnfinishedMessage();
+        throw e.unwrapIOException();
+      } finally {
+        if (parsedMessage != null) {
+          mergeFrom(parsedMessage);
+        }
+      }
+      return this;
+    }
+
+    private java.lang.Object name_ = "";
+    /**
+     *
+     *
+     * <pre>
+     * Required. Full resource name of [Product][google.cloud.retail.v2.Product],
+     * such as
+     * "projects/&#42;&#47;locations/global/catalogs/default_catalog/branches/default_branch/products/some_product_id".
+     * If the caller does not have permission to access the
+     * [Product][google.cloud.retail.v2.Product], regardless of whether or not it
+     * exists, a PERMISSION_DENIED error is returned.
+     * If the requested [Product][google.cloud.retail.v2.Product] does not exist,
+     * a NOT_FOUND error is returned.
+     * </pre>
+     *
+     * <code>
+     * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * </code>
+     *
+     * @return The name.
+     */
+    public java.lang.String getName() {
+      java.lang.Object ref = name_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        name_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. Full resource name of [Product][google.cloud.retail.v2.Product],
+     * such as
+     * "projects/&#42;&#47;locations/global/catalogs/default_catalog/branches/default_branch/products/some_product_id".
+     * If the caller does not have permission to access the
+     * [Product][google.cloud.retail.v2.Product], regardless of whether or not it
+     * exists, a PERMISSION_DENIED error is returned.
+     * If the requested [Product][google.cloud.retail.v2.Product] does not exist,
+     * a NOT_FOUND error is returned.
+     * </pre>
+     *
+     * <code>
+     * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * </code>
+     *
+     * @return The bytes for name.
+     */
+    public com.google.protobuf.ByteString getNameBytes() {
+      java.lang.Object ref = name_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b =
+            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+        name_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. Full resource name of [Product][google.cloud.retail.v2.Product],
+     * such as
+     * "projects/&#42;&#47;locations/global/catalogs/default_catalog/branches/default_branch/products/some_product_id".
+     * If the caller does not have permission to access the
+     * [Product][google.cloud.retail.v2.Product], regardless of whether or not it
+     * exists, a PERMISSION_DENIED error is returned.
+     * If the requested [Product][google.cloud.retail.v2.Product] does not exist,
+     * a NOT_FOUND error is returned.
+     * </pre>
+     *
+     * <code>
+     * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * </code>
+     *
+     * @param value The name to set.
+     * @return This builder for chaining.
+     */
+    public Builder setName(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+
+      name_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. Full resource name of [Product][google.cloud.retail.v2.Product],
+     * such as
+     * "projects/&#42;&#47;locations/global/catalogs/default_catalog/branches/default_branch/products/some_product_id".
+     * If the caller does not have permission to access the
+     * [Product][google.cloud.retail.v2.Product], regardless of whether or not it
+     * exists, a PERMISSION_DENIED error is returned.
+     * If the requested [Product][google.cloud.retail.v2.Product] does not exist,
+     * a NOT_FOUND error is returned.
+     * </pre>
+     *
+     * <code>
+     * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * </code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearName() {
+
+      name_ = getDefaultInstance().getName();
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. Full resource name of [Product][google.cloud.retail.v2.Product],
+     * such as
+     * "projects/&#42;&#47;locations/global/catalogs/default_catalog/branches/default_branch/products/some_product_id".
+     * If the caller does not have permission to access the
+     * [Product][google.cloud.retail.v2.Product], regardless of whether or not it
+     * exists, a PERMISSION_DENIED error is returned.
+     * If the requested [Product][google.cloud.retail.v2.Product] does not exist,
+     * a NOT_FOUND error is returned.
+     * </pre>
+     *
+     * <code>
+     * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * </code>
+     *
+     * @param value The bytes for name to set.
+     * @return This builder for chaining.
+     */
+    public Builder setNameBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+
+      name_ = value;
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.setUnknownFields(unknownFields);
+    }
+
+    @java.lang.Override
+    public final Builder mergeUnknownFields(
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+      return super.mergeUnknownFields(unknownFields);
+    }
+
+    // @@protoc_insertion_point(builder_scope:google.cloud.retail.v2.GetProductRequest)
+  }
+
+  // @@protoc_insertion_point(class_scope:google.cloud.retail.v2.GetProductRequest)
+  private static final com.google.cloud.retail.v2.GetProductRequest DEFAULT_INSTANCE;
+
+  static {
+    DEFAULT_INSTANCE = new com.google.cloud.retail.v2.GetProductRequest();
+  }
+
+  public static com.google.cloud.retail.v2.GetProductRequest getDefaultInstance() {
+    return DEFAULT_INSTANCE;
+  }
+
+  private static final com.google.protobuf.Parser<GetProductRequest> PARSER =
+      new com.google.protobuf.AbstractParser<GetProductRequest>() {
+        @java.lang.Override
+        public GetProductRequest parsePartialFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws com.google.protobuf.InvalidProtocolBufferException {
+          return new GetProductRequest(input, extensionRegistry);
+        }
+      };
+
+  public static com.google.protobuf.Parser<GetProductRequest> parser() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.protobuf.Parser<GetProductRequest> getParserForType() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.cloud.retail.v2.GetProductRequest getDefaultInstanceForType() {
+    return DEFAULT_INSTANCE;
+  }
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/GetProductRequestOrBuilder.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/GetProductRequestOrBuilder.java
new file mode 100644
index 00000000..c61a0366
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/GetProductRequestOrBuilder.java
@@ -0,0 +1,68 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/product_service.proto
+
+package com.google.cloud.retail.v2;
+
+public interface GetProductRequestOrBuilder
+    extends
+    // @@protoc_insertion_point(interface_extends:google.cloud.retail.v2.GetProductRequest)
+    com.google.protobuf.MessageOrBuilder {
+
+  /**
+   *
+   *
+   * <pre>
+   * Required. Full resource name of [Product][google.cloud.retail.v2.Product],
+   * such as
+   * "projects/&#42;&#47;locations/global/catalogs/default_catalog/branches/default_branch/products/some_product_id".
+   * If the caller does not have permission to access the
+   * [Product][google.cloud.retail.v2.Product], regardless of whether or not it
+   * exists, a PERMISSION_DENIED error is returned.
+   * If the requested [Product][google.cloud.retail.v2.Product] does not exist,
+   * a NOT_FOUND error is returned.
+   * </pre>
+   *
+   * <code>
+   * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+   * </code>
+   *
+   * @return The name.
+   */
+  java.lang.String getName();
+  /**
+   *
+   *
+   * <pre>
+   * Required. Full resource name of [Product][google.cloud.retail.v2.Product],
+   * such as
+   * "projects/&#42;&#47;locations/global/catalogs/default_catalog/branches/default_branch/products/some_product_id".
+   * If the caller does not have permission to access the
+   * [Product][google.cloud.retail.v2.Product], regardless of whether or not it
+   * exists, a PERMISSION_DENIED error is returned.
+   * If the requested [Product][google.cloud.retail.v2.Product] does not exist,
+   * a NOT_FOUND error is returned.
+   * </pre>
+   *
+   * <code>
+   * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+   * </code>
+   *
+   * @return The bytes for name.
+   */
+  com.google.protobuf.ByteString getNameBytes();
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/Image.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/Image.java
new file mode 100644
index 00000000..66bcb461
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/Image.java
@@ -0,0 +1,861 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/common.proto
+
+package com.google.cloud.retail.v2;
+
+/**
+ *
+ *
+ * <pre>
+ * [Product][google.cloud.retail.v2.Product] thumbnail/detail image.
+ * </pre>
+ *
+ * Protobuf type {@code google.cloud.retail.v2.Image}
+ */
+public final class Image extends com.google.protobuf.GeneratedMessageV3
+    implements
+    // @@protoc_insertion_point(message_implements:google.cloud.retail.v2.Image)
+    ImageOrBuilder {
+  private static final long serialVersionUID = 0L;
+  // Use Image.newBuilder() to construct.
+  private Image(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+    super(builder);
+  }
+
+  private Image() {
+    uri_ = "";
+  }
+
+  @java.lang.Override
+  @SuppressWarnings({"unused"})
+  protected java.lang.Object newInstance(UnusedPrivateParameter unused) {
+    return new Image();
+  }
+
+  @java.lang.Override
+  public final com.google.protobuf.UnknownFieldSet getUnknownFields() {
+    return this.unknownFields;
+  }
+
+  private Image(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    this();
+    if (extensionRegistry == null) {
+      throw new java.lang.NullPointerException();
+    }
+    com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+        com.google.protobuf.UnknownFieldSet.newBuilder();
+    try {
+      boolean done = false;
+      while (!done) {
+        int tag = input.readTag();
+        switch (tag) {
+          case 0:
+            done = true;
+            break;
+          case 10:
+            {
+              java.lang.String s = input.readStringRequireUtf8();
+
+              uri_ = s;
+              break;
+            }
+          case 16:
+            {
+              height_ = input.readInt32();
+              break;
+            }
+          case 24:
+            {
+              width_ = input.readInt32();
+              break;
+            }
+          default:
+            {
+              if (!parseUnknownField(input, unknownFields, extensionRegistry, tag)) {
+                done = true;
+              }
+              break;
+            }
+        }
+      }
+    } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+      throw e.setUnfinishedMessage(this);
+    } catch (java.io.IOException e) {
+      throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
+    } finally {
+      this.unknownFields = unknownFields.build();
+      makeExtensionsImmutable();
+    }
+  }
+
+  public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+    return com.google.cloud.retail.v2.CommonProto
+        .internal_static_google_cloud_retail_v2_Image_descriptor;
+  }
+
+  @java.lang.Override
+  protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internalGetFieldAccessorTable() {
+    return com.google.cloud.retail.v2.CommonProto
+        .internal_static_google_cloud_retail_v2_Image_fieldAccessorTable
+        .ensureFieldAccessorsInitialized(
+            com.google.cloud.retail.v2.Image.class, com.google.cloud.retail.v2.Image.Builder.class);
+  }
+
+  public static final int URI_FIELD_NUMBER = 1;
+  private volatile java.lang.Object uri_;
+  /**
+   *
+   *
+   * <pre>
+   * Required. URI of the image.
+   * This field must be a valid UTF-8 encoded URI with a length limit of 5,000
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * Google Merchant Center property
+   * [image_link](https://support.google.com/merchants/answer/6324350).
+   * Schema.org property [Product.image](https://schema.org/image).
+   * </pre>
+   *
+   * <code>string uri = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The uri.
+   */
+  @java.lang.Override
+  public java.lang.String getUri() {
+    java.lang.Object ref = uri_;
+    if (ref instanceof java.lang.String) {
+      return (java.lang.String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+      java.lang.String s = bs.toStringUtf8();
+      uri_ = s;
+      return s;
+    }
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Required. URI of the image.
+   * This field must be a valid UTF-8 encoded URI with a length limit of 5,000
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * Google Merchant Center property
+   * [image_link](https://support.google.com/merchants/answer/6324350).
+   * Schema.org property [Product.image](https://schema.org/image).
+   * </pre>
+   *
+   * <code>string uri = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The bytes for uri.
+   */
+  @java.lang.Override
+  public com.google.protobuf.ByteString getUriBytes() {
+    java.lang.Object ref = uri_;
+    if (ref instanceof java.lang.String) {
+      com.google.protobuf.ByteString b =
+          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+      uri_ = b;
+      return b;
+    } else {
+      return (com.google.protobuf.ByteString) ref;
+    }
+  }
+
+  public static final int HEIGHT_FIELD_NUMBER = 2;
+  private int height_;
+  /**
+   *
+   *
+   * <pre>
+   * Height of the image in number of pixels.
+   * This field must be nonnegative. Otherwise, an INVALID_ARGUMENT error is
+   * returned.
+   * </pre>
+   *
+   * <code>int32 height = 2;</code>
+   *
+   * @return The height.
+   */
+  @java.lang.Override
+  public int getHeight() {
+    return height_;
+  }
+
+  public static final int WIDTH_FIELD_NUMBER = 3;
+  private int width_;
+  /**
+   *
+   *
+   * <pre>
+   * Width of the image in number of pixels.
+   * This field must be nonnegative. Otherwise, an INVALID_ARGUMENT error is
+   * returned.
+   * </pre>
+   *
+   * <code>int32 width = 3;</code>
+   *
+   * @return The width.
+   */
+  @java.lang.Override
+  public int getWidth() {
+    return width_;
+  }
+
+  private byte memoizedIsInitialized = -1;
+
+  @java.lang.Override
+  public final boolean isInitialized() {
+    byte isInitialized = memoizedIsInitialized;
+    if (isInitialized == 1) return true;
+    if (isInitialized == 0) return false;
+
+    memoizedIsInitialized = 1;
+    return true;
+  }
+
+  @java.lang.Override
+  public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
+    if (!getUriBytes().isEmpty()) {
+      com.google.protobuf.GeneratedMessageV3.writeString(output, 1, uri_);
+    }
+    if (height_ != 0) {
+      output.writeInt32(2, height_);
+    }
+    if (width_ != 0) {
+      output.writeInt32(3, width_);
+    }
+    unknownFields.writeTo(output);
+  }
+
+  @java.lang.Override
+  public int getSerializedSize() {
+    int size = memoizedSize;
+    if (size != -1) return size;
+
+    size = 0;
+    if (!getUriBytes().isEmpty()) {
+      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(1, uri_);
+    }
+    if (height_ != 0) {
+      size += com.google.protobuf.CodedOutputStream.computeInt32Size(2, height_);
+    }
+    if (width_ != 0) {
+      size += com.google.protobuf.CodedOutputStream.computeInt32Size(3, width_);
+    }
+    size += unknownFields.getSerializedSize();
+    memoizedSize = size;
+    return size;
+  }
+
+  @java.lang.Override
+  public boolean equals(final java.lang.Object obj) {
+    if (obj == this) {
+      return true;
+    }
+    if (!(obj instanceof com.google.cloud.retail.v2.Image)) {
+      return super.equals(obj);
+    }
+    com.google.cloud.retail.v2.Image other = (com.google.cloud.retail.v2.Image) obj;
+
+    if (!getUri().equals(other.getUri())) return false;
+    if (getHeight() != other.getHeight()) return false;
+    if (getWidth() != other.getWidth()) return false;
+    if (!unknownFields.equals(other.unknownFields)) return false;
+    return true;
+  }
+
+  @java.lang.Override
+  public int hashCode() {
+    if (memoizedHashCode != 0) {
+      return memoizedHashCode;
+    }
+    int hash = 41;
+    hash = (19 * hash) + getDescriptor().hashCode();
+    hash = (37 * hash) + URI_FIELD_NUMBER;
+    hash = (53 * hash) + getUri().hashCode();
+    hash = (37 * hash) + HEIGHT_FIELD_NUMBER;
+    hash = (53 * hash) + getHeight();
+    hash = (37 * hash) + WIDTH_FIELD_NUMBER;
+    hash = (53 * hash) + getWidth();
+    hash = (29 * hash) + unknownFields.hashCode();
+    memoizedHashCode = hash;
+    return hash;
+  }
+
+  public static com.google.cloud.retail.v2.Image parseFrom(java.nio.ByteBuffer data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.Image parseFrom(
+      java.nio.ByteBuffer data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.Image parseFrom(com.google.protobuf.ByteString data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.Image parseFrom(
+      com.google.protobuf.ByteString data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.Image parseFrom(byte[] data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.Image parseFrom(
+      byte[] data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.Image parseFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.Image parseFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.Image parseDelimitedFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.Image parseDelimitedFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.Image parseFrom(
+      com.google.protobuf.CodedInputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.Image parseFrom(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  @java.lang.Override
+  public Builder newBuilderForType() {
+    return newBuilder();
+  }
+
+  public static Builder newBuilder() {
+    return DEFAULT_INSTANCE.toBuilder();
+  }
+
+  public static Builder newBuilder(com.google.cloud.retail.v2.Image prototype) {
+    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+  }
+
+  @java.lang.Override
+  public Builder toBuilder() {
+    return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
+  }
+
+  @java.lang.Override
+  protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+    Builder builder = new Builder(parent);
+    return builder;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * [Product][google.cloud.retail.v2.Product] thumbnail/detail image.
+   * </pre>
+   *
+   * Protobuf type {@code google.cloud.retail.v2.Image}
+   */
+  public static final class Builder extends com.google.protobuf.GeneratedMessageV3.Builder<Builder>
+      implements
+      // @@protoc_insertion_point(builder_implements:google.cloud.retail.v2.Image)
+      com.google.cloud.retail.v2.ImageOrBuilder {
+    public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+      return com.google.cloud.retail.v2.CommonProto
+          .internal_static_google_cloud_retail_v2_Image_descriptor;
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return com.google.cloud.retail.v2.CommonProto
+          .internal_static_google_cloud_retail_v2_Image_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              com.google.cloud.retail.v2.Image.class,
+              com.google.cloud.retail.v2.Image.Builder.class);
+    }
+
+    // Construct using com.google.cloud.retail.v2.Image.newBuilder()
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
+
+    private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+      super(parent);
+      maybeForceBuilderInitialization();
+    }
+
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders) {}
+    }
+
+    @java.lang.Override
+    public Builder clear() {
+      super.clear();
+      uri_ = "";
+
+      height_ = 0;
+
+      width_ = 0;
+
+      return this;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
+      return com.google.cloud.retail.v2.CommonProto
+          .internal_static_google_cloud_retail_v2_Image_descriptor;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.Image getDefaultInstanceForType() {
+      return com.google.cloud.retail.v2.Image.getDefaultInstance();
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.Image build() {
+      com.google.cloud.retail.v2.Image result = buildPartial();
+      if (!result.isInitialized()) {
+        throw newUninitializedMessageException(result);
+      }
+      return result;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.Image buildPartial() {
+      com.google.cloud.retail.v2.Image result = new com.google.cloud.retail.v2.Image(this);
+      result.uri_ = uri_;
+      result.height_ = height_;
+      result.width_ = width_;
+      onBuilt();
+      return result;
+    }
+
+    @java.lang.Override
+    public Builder clone() {
+      return super.clone();
+    }
+
+    @java.lang.Override
+    public Builder setField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.setField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
+      return super.clearField(field);
+    }
+
+    @java.lang.Override
+    public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+      return super.clearOneof(oneof);
+    }
+
+    @java.lang.Override
+    public Builder setRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, int index, java.lang.Object value) {
+      return super.setRepeatedField(field, index, value);
+    }
+
+    @java.lang.Override
+    public Builder addRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.addRepeatedField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(com.google.protobuf.Message other) {
+      if (other instanceof com.google.cloud.retail.v2.Image) {
+        return mergeFrom((com.google.cloud.retail.v2.Image) other);
+      } else {
+        super.mergeFrom(other);
+        return this;
+      }
+    }
+
+    public Builder mergeFrom(com.google.cloud.retail.v2.Image other) {
+      if (other == com.google.cloud.retail.v2.Image.getDefaultInstance()) return this;
+      if (!other.getUri().isEmpty()) {
+        uri_ = other.uri_;
+        onChanged();
+      }
+      if (other.getHeight() != 0) {
+        setHeight(other.getHeight());
+      }
+      if (other.getWidth() != 0) {
+        setWidth(other.getWidth());
+      }
+      this.mergeUnknownFields(other.unknownFields);
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final boolean isInitialized() {
+      return true;
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      com.google.cloud.retail.v2.Image parsedMessage = null;
+      try {
+        parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        parsedMessage = (com.google.cloud.retail.v2.Image) e.getUnfinishedMessage();
+        throw e.unwrapIOException();
+      } finally {
+        if (parsedMessage != null) {
+          mergeFrom(parsedMessage);
+        }
+      }
+      return this;
+    }
+
+    private java.lang.Object uri_ = "";
+    /**
+     *
+     *
+     * <pre>
+     * Required. URI of the image.
+     * This field must be a valid UTF-8 encoded URI with a length limit of 5,000
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * Google Merchant Center property
+     * [image_link](https://support.google.com/merchants/answer/6324350).
+     * Schema.org property [Product.image](https://schema.org/image).
+     * </pre>
+     *
+     * <code>string uri = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @return The uri.
+     */
+    public java.lang.String getUri() {
+      java.lang.Object ref = uri_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        uri_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. URI of the image.
+     * This field must be a valid UTF-8 encoded URI with a length limit of 5,000
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * Google Merchant Center property
+     * [image_link](https://support.google.com/merchants/answer/6324350).
+     * Schema.org property [Product.image](https://schema.org/image).
+     * </pre>
+     *
+     * <code>string uri = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @return The bytes for uri.
+     */
+    public com.google.protobuf.ByteString getUriBytes() {
+      java.lang.Object ref = uri_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b =
+            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+        uri_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. URI of the image.
+     * This field must be a valid UTF-8 encoded URI with a length limit of 5,000
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * Google Merchant Center property
+     * [image_link](https://support.google.com/merchants/answer/6324350).
+     * Schema.org property [Product.image](https://schema.org/image).
+     * </pre>
+     *
+     * <code>string uri = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @param value The uri to set.
+     * @return This builder for chaining.
+     */
+    public Builder setUri(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+
+      uri_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. URI of the image.
+     * This field must be a valid UTF-8 encoded URI with a length limit of 5,000
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * Google Merchant Center property
+     * [image_link](https://support.google.com/merchants/answer/6324350).
+     * Schema.org property [Product.image](https://schema.org/image).
+     * </pre>
+     *
+     * <code>string uri = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearUri() {
+
+      uri_ = getDefaultInstance().getUri();
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. URI of the image.
+     * This field must be a valid UTF-8 encoded URI with a length limit of 5,000
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * Google Merchant Center property
+     * [image_link](https://support.google.com/merchants/answer/6324350).
+     * Schema.org property [Product.image](https://schema.org/image).
+     * </pre>
+     *
+     * <code>string uri = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @param value The bytes for uri to set.
+     * @return This builder for chaining.
+     */
+    public Builder setUriBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+
+      uri_ = value;
+      onChanged();
+      return this;
+    }
+
+    private int height_;
+    /**
+     *
+     *
+     * <pre>
+     * Height of the image in number of pixels.
+     * This field must be nonnegative. Otherwise, an INVALID_ARGUMENT error is
+     * returned.
+     * </pre>
+     *
+     * <code>int32 height = 2;</code>
+     *
+     * @return The height.
+     */
+    @java.lang.Override
+    public int getHeight() {
+      return height_;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Height of the image in number of pixels.
+     * This field must be nonnegative. Otherwise, an INVALID_ARGUMENT error is
+     * returned.
+     * </pre>
+     *
+     * <code>int32 height = 2;</code>
+     *
+     * @param value The height to set.
+     * @return This builder for chaining.
+     */
+    public Builder setHeight(int value) {
+
+      height_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Height of the image in number of pixels.
+     * This field must be nonnegative. Otherwise, an INVALID_ARGUMENT error is
+     * returned.
+     * </pre>
+     *
+     * <code>int32 height = 2;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearHeight() {
+
+      height_ = 0;
+      onChanged();
+      return this;
+    }
+
+    private int width_;
+    /**
+     *
+     *
+     * <pre>
+     * Width of the image in number of pixels.
+     * This field must be nonnegative. Otherwise, an INVALID_ARGUMENT error is
+     * returned.
+     * </pre>
+     *
+     * <code>int32 width = 3;</code>
+     *
+     * @return The width.
+     */
+    @java.lang.Override
+    public int getWidth() {
+      return width_;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Width of the image in number of pixels.
+     * This field must be nonnegative. Otherwise, an INVALID_ARGUMENT error is
+     * returned.
+     * </pre>
+     *
+     * <code>int32 width = 3;</code>
+     *
+     * @param value The width to set.
+     * @return This builder for chaining.
+     */
+    public Builder setWidth(int value) {
+
+      width_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Width of the image in number of pixels.
+     * This field must be nonnegative. Otherwise, an INVALID_ARGUMENT error is
+     * returned.
+     * </pre>
+     *
+     * <code>int32 width = 3;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearWidth() {
+
+      width_ = 0;
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.setUnknownFields(unknownFields);
+    }
+
+    @java.lang.Override
+    public final Builder mergeUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.mergeUnknownFields(unknownFields);
+    }
+
+    // @@protoc_insertion_point(builder_scope:google.cloud.retail.v2.Image)
+  }
+
+  // @@protoc_insertion_point(class_scope:google.cloud.retail.v2.Image)
+  private static final com.google.cloud.retail.v2.Image DEFAULT_INSTANCE;
+
+  static {
+    DEFAULT_INSTANCE = new com.google.cloud.retail.v2.Image();
+  }
+
+  public static com.google.cloud.retail.v2.Image getDefaultInstance() {
+    return DEFAULT_INSTANCE;
+  }
+
+  private static final com.google.protobuf.Parser<Image> PARSER =
+      new com.google.protobuf.AbstractParser<Image>() {
+        @java.lang.Override
+        public Image parsePartialFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws com.google.protobuf.InvalidProtocolBufferException {
+          return new Image(input, extensionRegistry);
+        }
+      };
+
+  public static com.google.protobuf.Parser<Image> parser() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.protobuf.Parser<Image> getParserForType() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.cloud.retail.v2.Image getDefaultInstanceForType() {
+    return DEFAULT_INSTANCE;
+  }
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ImageOrBuilder.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ImageOrBuilder.java
new file mode 100644
index 00000000..180eb9d5
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ImageOrBuilder.java
@@ -0,0 +1,90 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/common.proto
+
+package com.google.cloud.retail.v2;
+
+public interface ImageOrBuilder
+    extends
+    // @@protoc_insertion_point(interface_extends:google.cloud.retail.v2.Image)
+    com.google.protobuf.MessageOrBuilder {
+
+  /**
+   *
+   *
+   * <pre>
+   * Required. URI of the image.
+   * This field must be a valid UTF-8 encoded URI with a length limit of 5,000
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * Google Merchant Center property
+   * [image_link](https://support.google.com/merchants/answer/6324350).
+   * Schema.org property [Product.image](https://schema.org/image).
+   * </pre>
+   *
+   * <code>string uri = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The uri.
+   */
+  java.lang.String getUri();
+  /**
+   *
+   *
+   * <pre>
+   * Required. URI of the image.
+   * This field must be a valid UTF-8 encoded URI with a length limit of 5,000
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * Google Merchant Center property
+   * [image_link](https://support.google.com/merchants/answer/6324350).
+   * Schema.org property [Product.image](https://schema.org/image).
+   * </pre>
+   *
+   * <code>string uri = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The bytes for uri.
+   */
+  com.google.protobuf.ByteString getUriBytes();
+
+  /**
+   *
+   *
+   * <pre>
+   * Height of the image in number of pixels.
+   * This field must be nonnegative. Otherwise, an INVALID_ARGUMENT error is
+   * returned.
+   * </pre>
+   *
+   * <code>int32 height = 2;</code>
+   *
+   * @return The height.
+   */
+  int getHeight();
+
+  /**
+   *
+   *
+   * <pre>
+   * Width of the image in number of pixels.
+   * This field must be nonnegative. Otherwise, an INVALID_ARGUMENT error is
+   * returned.
+   * </pre>
+   *
+   * <code>int32 width = 3;</code>
+   *
+   * @return The width.
+   */
+  int getWidth();
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ImportConfigProto.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ImportConfigProto.java
new file mode 100644
index 00000000..d912605f
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ImportConfigProto.java
@@ -0,0 +1,285 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/import_config.proto
+
+package com.google.cloud.retail.v2;
+
+public final class ImportConfigProto {
+  private ImportConfigProto() {}
+
+  public static void registerAllExtensions(com.google.protobuf.ExtensionRegistryLite registry) {}
+
+  public static void registerAllExtensions(com.google.protobuf.ExtensionRegistry registry) {
+    registerAllExtensions((com.google.protobuf.ExtensionRegistryLite) registry);
+  }
+
+  static final com.google.protobuf.Descriptors.Descriptor
+      internal_static_google_cloud_retail_v2_GcsSource_descriptor;
+  static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_google_cloud_retail_v2_GcsSource_fieldAccessorTable;
+  static final com.google.protobuf.Descriptors.Descriptor
+      internal_static_google_cloud_retail_v2_BigQuerySource_descriptor;
+  static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_google_cloud_retail_v2_BigQuerySource_fieldAccessorTable;
+  static final com.google.protobuf.Descriptors.Descriptor
+      internal_static_google_cloud_retail_v2_ProductInlineSource_descriptor;
+  static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_google_cloud_retail_v2_ProductInlineSource_fieldAccessorTable;
+  static final com.google.protobuf.Descriptors.Descriptor
+      internal_static_google_cloud_retail_v2_UserEventInlineSource_descriptor;
+  static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_google_cloud_retail_v2_UserEventInlineSource_fieldAccessorTable;
+  static final com.google.protobuf.Descriptors.Descriptor
+      internal_static_google_cloud_retail_v2_ImportErrorsConfig_descriptor;
+  static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_google_cloud_retail_v2_ImportErrorsConfig_fieldAccessorTable;
+  static final com.google.protobuf.Descriptors.Descriptor
+      internal_static_google_cloud_retail_v2_ImportProductsRequest_descriptor;
+  static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_google_cloud_retail_v2_ImportProductsRequest_fieldAccessorTable;
+  static final com.google.protobuf.Descriptors.Descriptor
+      internal_static_google_cloud_retail_v2_ImportUserEventsRequest_descriptor;
+  static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_google_cloud_retail_v2_ImportUserEventsRequest_fieldAccessorTable;
+  static final com.google.protobuf.Descriptors.Descriptor
+      internal_static_google_cloud_retail_v2_ProductInputConfig_descriptor;
+  static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_google_cloud_retail_v2_ProductInputConfig_fieldAccessorTable;
+  static final com.google.protobuf.Descriptors.Descriptor
+      internal_static_google_cloud_retail_v2_UserEventInputConfig_descriptor;
+  static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_google_cloud_retail_v2_UserEventInputConfig_fieldAccessorTable;
+  static final com.google.protobuf.Descriptors.Descriptor
+      internal_static_google_cloud_retail_v2_ImportMetadata_descriptor;
+  static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_google_cloud_retail_v2_ImportMetadata_fieldAccessorTable;
+  static final com.google.protobuf.Descriptors.Descriptor
+      internal_static_google_cloud_retail_v2_ImportProductsResponse_descriptor;
+  static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_google_cloud_retail_v2_ImportProductsResponse_fieldAccessorTable;
+  static final com.google.protobuf.Descriptors.Descriptor
+      internal_static_google_cloud_retail_v2_ImportUserEventsResponse_descriptor;
+  static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_google_cloud_retail_v2_ImportUserEventsResponse_fieldAccessorTable;
+  static final com.google.protobuf.Descriptors.Descriptor
+      internal_static_google_cloud_retail_v2_UserEventImportSummary_descriptor;
+  static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_google_cloud_retail_v2_UserEventImportSummary_fieldAccessorTable;
+
+  public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
+    return descriptor;
+  }
+
+  private static com.google.protobuf.Descriptors.FileDescriptor descriptor;
+
+  static {
+    java.lang.String[] descriptorData = {
+      "\n*google/cloud/retail/v2/import_config.p"
+          + "roto\022\026google.cloud.retail.v2\032\034google/api"
+          + "/annotations.proto\032\037google/api/field_beh"
+          + "avior.proto\032$google/cloud/retail/v2/prod"
+          + "uct.proto\032\'google/cloud/retail/v2/user_e"
+          + "vent.proto\032 google/protobuf/field_mask.p"
+          + "roto\032\037google/protobuf/timestamp.proto\032\027g"
+          + "oogle/rpc/status.proto\"9\n\tGcsSource\022\027\n\ni"
+          + "nput_uris\030\001 \003(\tB\003\340A\002\022\023\n\013data_schema\030\002 \001("
+          + "\t\"\202\001\n\016BigQuerySource\022\022\n\nproject_id\030\005 \001(\t"
+          + "\022\027\n\ndataset_id\030\001 \001(\tB\003\340A\002\022\025\n\010table_id\030\002 "
+          + "\001(\tB\003\340A\002\022\027\n\017gcs_staging_dir\030\003 \001(\t\022\023\n\013dat"
+          + "a_schema\030\004 \001(\t\"M\n\023ProductInlineSource\0226\n"
+          + "\010products\030\001 \003(\0132\037.google.cloud.retail.v2"
+          + ".ProductB\003\340A\002\"T\n\025UserEventInlineSource\022;"
+          + "\n\013user_events\030\001 \003(\0132!.google.cloud.retai"
+          + "l.v2.UserEventB\003\340A\002\"9\n\022ImportErrorsConfi"
+          + "g\022\024\n\ngcs_prefix\030\001 \001(\tH\000B\r\n\013destination\"\347"
+          + "\001\n\025ImportProductsRequest\022\023\n\006parent\030\001 \001(\t"
+          + "B\003\340A\002\022E\n\014input_config\030\002 \001(\0132*.google.clo"
+          + "ud.retail.v2.ProductInputConfigB\003\340A\002\022A\n\r"
+          + "errors_config\030\003 \001(\0132*.google.cloud.retai"
+          + "l.v2.ImportErrorsConfig\022/\n\013update_mask\030\004"
+          + " \001(\0132\032.google.protobuf.FieldMask\"\272\001\n\027Imp"
+          + "ortUserEventsRequest\022\023\n\006parent\030\001 \001(\tB\003\340A"
+          + "\002\022G\n\014input_config\030\002 \001(\0132,.google.cloud.r"
+          + "etail.v2.UserEventInputConfigB\003\340A\002\022A\n\rer"
+          + "rors_config\030\003 \001(\0132*.google.cloud.retail."
+          + "v2.ImportErrorsConfig\"\351\001\n\022ProductInputCo"
+          + "nfig\022L\n\025product_inline_source\030\001 \001(\0132+.go"
+          + "ogle.cloud.retail.v2.ProductInlineSource"
+          + "H\000\0227\n\ngcs_source\030\002 \001(\0132!.google.cloud.re"
+          + "tail.v2.GcsSourceH\000\022B\n\020big_query_source\030"
+          + "\003 \001(\0132&.google.cloud.retail.v2.BigQueryS"
+          + "ourceH\000B\010\n\006source\"\377\001\n\024UserEventInputConf"
+          + "ig\022V\n\030user_event_inline_source\030\001 \001(\0132-.g"
+          + "oogle.cloud.retail.v2.UserEventInlineSou"
+          + "rceB\003\340A\002H\000\022<\n\ngcs_source\030\002 \001(\0132!.google."
+          + "cloud.retail.v2.GcsSourceB\003\340A\002H\000\022G\n\020big_"
+          + "query_source\030\003 \001(\0132&.google.cloud.retail"
+          + ".v2.BigQuerySourceB\003\340A\002H\000B\010\n\006source\"\240\001\n\016"
+          + "ImportMetadata\022/\n\013create_time\030\001 \001(\0132\032.go"
+          + "ogle.protobuf.Timestamp\022/\n\013update_time\030\002"
+          + " \001(\0132\032.google.protobuf.Timestamp\022\025\n\rsucc"
+          + "ess_count\030\003 \001(\003\022\025\n\rfailure_count\030\004 \001(\003\"\206"
+          + "\001\n\026ImportProductsResponse\022)\n\rerror_sampl"
+          + "es\030\001 \003(\0132\022.google.rpc.Status\022A\n\rerrors_c"
+          + "onfig\030\002 \001(\0132*.google.cloud.retail.v2.Imp"
+          + "ortErrorsConfig\"\320\001\n\030ImportUserEventsResp"
+          + "onse\022)\n\rerror_samples\030\001 \003(\0132\022.google.rpc"
+          + ".Status\022A\n\rerrors_config\030\002 \001(\0132*.google."
+          + "cloud.retail.v2.ImportErrorsConfig\022F\n\016im"
+          + "port_summary\030\003 \001(\0132..google.cloud.retail"
+          + ".v2.UserEventImportSummary\"T\n\026UserEventI"
+          + "mportSummary\022\033\n\023joined_events_count\030\001 \001("
+          + "\003\022\035\n\025unjoined_events_count\030\002 \001(\003B\306\001\n\032com"
+          + ".google.cloud.retail.v2B\021ImportConfigPro"
+          + "toP\001Z<google.golang.org/genproto/googlea"
+          + "pis/cloud/retail/v2;retail\242\002\006RETAIL\252\002\026Go"
+          + "ogle.Cloud.Retail.V2\312\002\026Google\\Cloud\\Reta"
+          + "il\\V2\352\002\031Google::Cloud::Retail::V2b\006proto"
+          + "3"
+    };
+    descriptor =
+        com.google.protobuf.Descriptors.FileDescriptor.internalBuildGeneratedFileFrom(
+            descriptorData,
+            new com.google.protobuf.Descriptors.FileDescriptor[] {
+              com.google.api.AnnotationsProto.getDescriptor(),
+              com.google.api.FieldBehaviorProto.getDescriptor(),
+              com.google.cloud.retail.v2.ProductProto.getDescriptor(),
+              com.google.cloud.retail.v2.UserEventProto.getDescriptor(),
+              com.google.protobuf.FieldMaskProto.getDescriptor(),
+              com.google.protobuf.TimestampProto.getDescriptor(),
+              com.google.rpc.StatusProto.getDescriptor(),
+            });
+    internal_static_google_cloud_retail_v2_GcsSource_descriptor =
+        getDescriptor().getMessageTypes().get(0);
+    internal_static_google_cloud_retail_v2_GcsSource_fieldAccessorTable =
+        new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+            internal_static_google_cloud_retail_v2_GcsSource_descriptor,
+            new java.lang.String[] {
+              "InputUris", "DataSchema",
+            });
+    internal_static_google_cloud_retail_v2_BigQuerySource_descriptor =
+        getDescriptor().getMessageTypes().get(1);
+    internal_static_google_cloud_retail_v2_BigQuerySource_fieldAccessorTable =
+        new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+            internal_static_google_cloud_retail_v2_BigQuerySource_descriptor,
+            new java.lang.String[] {
+              "ProjectId", "DatasetId", "TableId", "GcsStagingDir", "DataSchema",
+            });
+    internal_static_google_cloud_retail_v2_ProductInlineSource_descriptor =
+        getDescriptor().getMessageTypes().get(2);
+    internal_static_google_cloud_retail_v2_ProductInlineSource_fieldAccessorTable =
+        new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+            internal_static_google_cloud_retail_v2_ProductInlineSource_descriptor,
+            new java.lang.String[] {
+              "Products",
+            });
+    internal_static_google_cloud_retail_v2_UserEventInlineSource_descriptor =
+        getDescriptor().getMessageTypes().get(3);
+    internal_static_google_cloud_retail_v2_UserEventInlineSource_fieldAccessorTable =
+        new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+            internal_static_google_cloud_retail_v2_UserEventInlineSource_descriptor,
+            new java.lang.String[] {
+              "UserEvents",
+            });
+    internal_static_google_cloud_retail_v2_ImportErrorsConfig_descriptor =
+        getDescriptor().getMessageTypes().get(4);
+    internal_static_google_cloud_retail_v2_ImportErrorsConfig_fieldAccessorTable =
+        new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+            internal_static_google_cloud_retail_v2_ImportErrorsConfig_descriptor,
+            new java.lang.String[] {
+              "GcsPrefix", "Destination",
+            });
+    internal_static_google_cloud_retail_v2_ImportProductsRequest_descriptor =
+        getDescriptor().getMessageTypes().get(5);
+    internal_static_google_cloud_retail_v2_ImportProductsRequest_fieldAccessorTable =
+        new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+            internal_static_google_cloud_retail_v2_ImportProductsRequest_descriptor,
+            new java.lang.String[] {
+              "Parent", "InputConfig", "ErrorsConfig", "UpdateMask",
+            });
+    internal_static_google_cloud_retail_v2_ImportUserEventsRequest_descriptor =
+        getDescriptor().getMessageTypes().get(6);
+    internal_static_google_cloud_retail_v2_ImportUserEventsRequest_fieldAccessorTable =
+        new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+            internal_static_google_cloud_retail_v2_ImportUserEventsRequest_descriptor,
+            new java.lang.String[] {
+              "Parent", "InputConfig", "ErrorsConfig",
+            });
+    internal_static_google_cloud_retail_v2_ProductInputConfig_descriptor =
+        getDescriptor().getMessageTypes().get(7);
+    internal_static_google_cloud_retail_v2_ProductInputConfig_fieldAccessorTable =
+        new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+            internal_static_google_cloud_retail_v2_ProductInputConfig_descriptor,
+            new java.lang.String[] {
+              "ProductInlineSource", "GcsSource", "BigQuerySource", "Source",
+            });
+    internal_static_google_cloud_retail_v2_UserEventInputConfig_descriptor =
+        getDescriptor().getMessageTypes().get(8);
+    internal_static_google_cloud_retail_v2_UserEventInputConfig_fieldAccessorTable =
+        new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+            internal_static_google_cloud_retail_v2_UserEventInputConfig_descriptor,
+            new java.lang.String[] {
+              "UserEventInlineSource", "GcsSource", "BigQuerySource", "Source",
+            });
+    internal_static_google_cloud_retail_v2_ImportMetadata_descriptor =
+        getDescriptor().getMessageTypes().get(9);
+    internal_static_google_cloud_retail_v2_ImportMetadata_fieldAccessorTable =
+        new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+            internal_static_google_cloud_retail_v2_ImportMetadata_descriptor,
+            new java.lang.String[] {
+              "CreateTime", "UpdateTime", "SuccessCount", "FailureCount",
+            });
+    internal_static_google_cloud_retail_v2_ImportProductsResponse_descriptor =
+        getDescriptor().getMessageTypes().get(10);
+    internal_static_google_cloud_retail_v2_ImportProductsResponse_fieldAccessorTable =
+        new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+            internal_static_google_cloud_retail_v2_ImportProductsResponse_descriptor,
+            new java.lang.String[] {
+              "ErrorSamples", "ErrorsConfig",
+            });
+    internal_static_google_cloud_retail_v2_ImportUserEventsResponse_descriptor =
+        getDescriptor().getMessageTypes().get(11);
+    internal_static_google_cloud_retail_v2_ImportUserEventsResponse_fieldAccessorTable =
+        new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+            internal_static_google_cloud_retail_v2_ImportUserEventsResponse_descriptor,
+            new java.lang.String[] {
+              "ErrorSamples", "ErrorsConfig", "ImportSummary",
+            });
+    internal_static_google_cloud_retail_v2_UserEventImportSummary_descriptor =
+        getDescriptor().getMessageTypes().get(12);
+    internal_static_google_cloud_retail_v2_UserEventImportSummary_fieldAccessorTable =
+        new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+            internal_static_google_cloud_retail_v2_UserEventImportSummary_descriptor,
+            new java.lang.String[] {
+              "JoinedEventsCount", "UnjoinedEventsCount",
+            });
+    com.google.protobuf.ExtensionRegistry registry =
+        com.google.protobuf.ExtensionRegistry.newInstance();
+    registry.add(com.google.api.FieldBehaviorProto.fieldBehavior);
+    com.google.protobuf.Descriptors.FileDescriptor.internalUpdateFileDescriptor(
+        descriptor, registry);
+    com.google.api.AnnotationsProto.getDescriptor();
+    com.google.api.FieldBehaviorProto.getDescriptor();
+    com.google.cloud.retail.v2.ProductProto.getDescriptor();
+    com.google.cloud.retail.v2.UserEventProto.getDescriptor();
+    com.google.protobuf.FieldMaskProto.getDescriptor();
+    com.google.protobuf.TimestampProto.getDescriptor();
+    com.google.rpc.StatusProto.getDescriptor();
+  }
+
+  // @@protoc_insertion_point(outer_class_scope)
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ImportErrorsConfig.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ImportErrorsConfig.java
new file mode 100644
index 00000000..8100932c
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ImportErrorsConfig.java
@@ -0,0 +1,756 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/import_config.proto
+
+package com.google.cloud.retail.v2;
+
+/**
+ *
+ *
+ * <pre>
+ * Configuration of destination for Import related errors.
+ * </pre>
+ *
+ * Protobuf type {@code google.cloud.retail.v2.ImportErrorsConfig}
+ */
+public final class ImportErrorsConfig extends com.google.protobuf.GeneratedMessageV3
+    implements
+    // @@protoc_insertion_point(message_implements:google.cloud.retail.v2.ImportErrorsConfig)
+    ImportErrorsConfigOrBuilder {
+  private static final long serialVersionUID = 0L;
+  // Use ImportErrorsConfig.newBuilder() to construct.
+  private ImportErrorsConfig(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+    super(builder);
+  }
+
+  private ImportErrorsConfig() {}
+
+  @java.lang.Override
+  @SuppressWarnings({"unused"})
+  protected java.lang.Object newInstance(UnusedPrivateParameter unused) {
+    return new ImportErrorsConfig();
+  }
+
+  @java.lang.Override
+  public final com.google.protobuf.UnknownFieldSet getUnknownFields() {
+    return this.unknownFields;
+  }
+
+  private ImportErrorsConfig(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    this();
+    if (extensionRegistry == null) {
+      throw new java.lang.NullPointerException();
+    }
+    com.google.protobuf.UnknownFieldSet.Builder unknownFields =
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+        switch (tag) {
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+            break;
+          case 10:
+            {
+              java.lang.String s = input.readStringRequireUtf8();
+              destinationCase_ = 1;
+              destination_ = s;
+              break;
+            }
+          default:
+            {
+              if (!parseUnknownField(input, unknownFields, extensionRegistry, tag)) {
+                done = true;
+              }
+              break;
+            }
+        }
+      }
+    } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+      throw e.setUnfinishedMessage(this);
+    } catch (java.io.IOException e) {
+      throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
+    } finally {
+      this.unknownFields = unknownFields.build();
+      makeExtensionsImmutable();
+    }
+  }
+
+  public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+    return com.google.cloud.retail.v2.ImportConfigProto
+        .internal_static_google_cloud_retail_v2_ImportErrorsConfig_descriptor;
+  }
+
+  @java.lang.Override
+  protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internalGetFieldAccessorTable() {
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+
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+    }
+    /**
+     * @param value The number of the enum to look for.
+     * @return The enum associated with the given number.
+     * @deprecated Use {@link #forNumber(int)} instead.
+     */
+    @java.lang.Deprecated
+    public static DestinationCase valueOf(int value) {
+      return forNumber(value);
+    }
+
+    public static DestinationCase forNumber(int value) {
+      switch (value) {
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+          return GCS_PREFIX;
+        case 0:
+          return DESTINATION_NOT_SET;
+        default:
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+
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+  };
+
+  public DestinationCase getDestinationCase() {
+    return DestinationCase.forNumber(destinationCase_);
+  }
+
+  public static final int GCS_PREFIX_FIELD_NUMBER = 1;
+  /**
+   *
+   *
+   * <pre>
+   * Google Cloud Storage path for import errors. This must be an empty,
+   * existing Cloud Storage bucket. Import errors will be written to a file in
+   * this bucket, one per line, as a JSON-encoded
+   * `google.rpc.Status` message.
+   * </pre>
+   *
+   * <code>string gcs_prefix = 1;</code>
+   *
+   * @return The gcsPrefix.
+   */
+  public java.lang.String getGcsPrefix() {
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+    if (destinationCase_ == 1) {
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+      if (destinationCase_ == 1) {
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+      }
+      return s;
+    }
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Google Cloud Storage path for import errors. This must be an empty,
+   * existing Cloud Storage bucket. Import errors will be written to a file in
+   * this bucket, one per line, as a JSON-encoded
+   * `google.rpc.Status` message.
+   * </pre>
+   *
+   * <code>string gcs_prefix = 1;</code>
+   *
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+   */
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+
+  private byte memoizedIsInitialized = -1;
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+  @java.lang.Override
+  public final boolean isInitialized() {
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+    if (isInitialized == 1) return true;
+    if (isInitialized == 0) return false;
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+    memoizedIsInitialized = 1;
+    return true;
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+
+  @java.lang.Override
+  public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
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+      com.google.protobuf.GeneratedMessageV3.writeString(output, 1, destination_);
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+    unknownFields.writeTo(output);
+  }
+
+  @java.lang.Override
+  public int getSerializedSize() {
+    int size = memoizedSize;
+    if (size != -1) return size;
+
+    size = 0;
+    if (destinationCase_ == 1) {
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+    memoizedSize = size;
+    return size;
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+
+  @java.lang.Override
+  public boolean equals(final java.lang.Object obj) {
+    if (obj == this) {
+      return true;
+    }
+    if (!(obj instanceof com.google.cloud.retail.v2.ImportErrorsConfig)) {
+      return super.equals(obj);
+    }
+    com.google.cloud.retail.v2.ImportErrorsConfig other =
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+    switch (destinationCase_) {
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+        break;
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+    }
+    if (!unknownFields.equals(other.unknownFields)) return false;
+    return true;
+  }
+
+  @java.lang.Override
+  public int hashCode() {
+    if (memoizedHashCode != 0) {
+      return memoizedHashCode;
+    }
+    int hash = 41;
+    hash = (19 * hash) + getDescriptor().hashCode();
+    switch (destinationCase_) {
+      case 1:
+        hash = (37 * hash) + GCS_PREFIX_FIELD_NUMBER;
+        hash = (53 * hash) + getGcsPrefix().hashCode();
+        break;
+      case 0:
+      default:
+    }
+    hash = (29 * hash) + unknownFields.hashCode();
+    memoizedHashCode = hash;
+    return hash;
+  }
+
+  public static com.google.cloud.retail.v2.ImportErrorsConfig parseFrom(java.nio.ByteBuffer data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.ImportErrorsConfig parseFrom(
+      java.nio.ByteBuffer data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.ImportErrorsConfig parseFrom(
+      com.google.protobuf.ByteString data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.ImportErrorsConfig parseFrom(
+      com.google.protobuf.ByteString data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.ImportErrorsConfig parseFrom(byte[] data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.ImportErrorsConfig parseFrom(
+      byte[] data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.ImportErrorsConfig parseFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.ImportErrorsConfig parseFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.ImportErrorsConfig parseDelimitedFrom(
+      java.io.InputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.ImportErrorsConfig parseDelimitedFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.ImportErrorsConfig parseFrom(
+      com.google.protobuf.CodedInputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.ImportErrorsConfig parseFrom(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  @java.lang.Override
+  public Builder newBuilderForType() {
+    return newBuilder();
+  }
+
+  public static Builder newBuilder() {
+    return DEFAULT_INSTANCE.toBuilder();
+  }
+
+  public static Builder newBuilder(com.google.cloud.retail.v2.ImportErrorsConfig prototype) {
+    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+  }
+
+  @java.lang.Override
+  public Builder toBuilder() {
+    return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
+  }
+
+  @java.lang.Override
+  protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+    Builder builder = new Builder(parent);
+    return builder;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Configuration of destination for Import related errors.
+   * </pre>
+   *
+   * Protobuf type {@code google.cloud.retail.v2.ImportErrorsConfig}
+   */
+  public static final class Builder extends com.google.protobuf.GeneratedMessageV3.Builder<Builder>
+      implements
+      // @@protoc_insertion_point(builder_implements:google.cloud.retail.v2.ImportErrorsConfig)
+      com.google.cloud.retail.v2.ImportErrorsConfigOrBuilder {
+    public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+      return com.google.cloud.retail.v2.ImportConfigProto
+          .internal_static_google_cloud_retail_v2_ImportErrorsConfig_descriptor;
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return com.google.cloud.retail.v2.ImportConfigProto
+          .internal_static_google_cloud_retail_v2_ImportErrorsConfig_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
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+              com.google.cloud.retail.v2.ImportErrorsConfig.Builder.class);
+    }
+
+    // Construct using com.google.cloud.retail.v2.ImportErrorsConfig.newBuilder()
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
+
+    private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+      super(parent);
+      maybeForceBuilderInitialization();
+    }
+
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders) {}
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+
+    @java.lang.Override
+    public Builder clear() {
+      super.clear();
+      destinationCase_ = 0;
+      destination_ = null;
+      return this;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
+      return com.google.cloud.retail.v2.ImportConfigProto
+          .internal_static_google_cloud_retail_v2_ImportErrorsConfig_descriptor;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.ImportErrorsConfig getDefaultInstanceForType() {
+      return com.google.cloud.retail.v2.ImportErrorsConfig.getDefaultInstance();
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.ImportErrorsConfig build() {
+      com.google.cloud.retail.v2.ImportErrorsConfig result = buildPartial();
+      if (!result.isInitialized()) {
+        throw newUninitializedMessageException(result);
+      }
+      return result;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.ImportErrorsConfig buildPartial() {
+      com.google.cloud.retail.v2.ImportErrorsConfig result =
+          new com.google.cloud.retail.v2.ImportErrorsConfig(this);
+      if (destinationCase_ == 1) {
+        result.destination_ = destination_;
+      }
+      result.destinationCase_ = destinationCase_;
+      onBuilt();
+      return result;
+    }
+
+    @java.lang.Override
+    public Builder clone() {
+      return super.clone();
+    }
+
+    @java.lang.Override
+    public Builder setField(
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+    @java.lang.Override
+    public Builder addRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
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+    @java.lang.Override
+    public Builder mergeFrom(com.google.protobuf.Message other) {
+      if (other instanceof com.google.cloud.retail.v2.ImportErrorsConfig) {
+        return mergeFrom((com.google.cloud.retail.v2.ImportErrorsConfig) other);
+      } else {
+        super.mergeFrom(other);
+        return this;
+      }
+    }
+
+    public Builder mergeFrom(com.google.cloud.retail.v2.ImportErrorsConfig other) {
+      if (other == com.google.cloud.retail.v2.ImportErrorsConfig.getDefaultInstance()) return this;
+      switch (other.getDestinationCase()) {
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+      }
+      this.mergeUnknownFields(other.unknownFields);
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final boolean isInitialized() {
+      return true;
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      com.google.cloud.retail.v2.ImportErrorsConfig parsedMessage = null;
+      try {
+        parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        parsedMessage = (com.google.cloud.retail.v2.ImportErrorsConfig) e.getUnfinishedMessage();
+        throw e.unwrapIOException();
+      } finally {
+        if (parsedMessage != null) {
+          mergeFrom(parsedMessage);
+        }
+      }
+      return this;
+    }
+
+    private int destinationCase_ = 0;
+    private java.lang.Object destination_;
+
+    public DestinationCase getDestinationCase() {
+      return DestinationCase.forNumber(destinationCase_);
+    }
+
+    public Builder clearDestination() {
+      destinationCase_ = 0;
+      destination_ = null;
+      onChanged();
+      return this;
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * Google Cloud Storage path for import errors. This must be an empty,
+     * existing Cloud Storage bucket. Import errors will be written to a file in
+     * this bucket, one per line, as a JSON-encoded
+     * `google.rpc.Status` message.
+     * </pre>
+     *
+     * <code>string gcs_prefix = 1;</code>
+     *
+     * @return The gcsPrefix.
+     */
+    @java.lang.Override
+    public java.lang.String getGcsPrefix() {
+      java.lang.Object ref = "";
+      if (destinationCase_ == 1) {
+        ref = destination_;
+      }
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        if (destinationCase_ == 1) {
+          destination_ = s;
+        }
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Google Cloud Storage path for import errors. This must be an empty,
+     * existing Cloud Storage bucket. Import errors will be written to a file in
+     * this bucket, one per line, as a JSON-encoded
+     * `google.rpc.Status` message.
+     * </pre>
+     *
+     * <code>string gcs_prefix = 1;</code>
+     *
+     * @return The bytes for gcsPrefix.
+     */
+    @java.lang.Override
+    public com.google.protobuf.ByteString getGcsPrefixBytes() {
+      java.lang.Object ref = "";
+      if (destinationCase_ == 1) {
+        ref = destination_;
+      }
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b =
+            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+        if (destinationCase_ == 1) {
+          destination_ = b;
+        }
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Google Cloud Storage path for import errors. This must be an empty,
+     * existing Cloud Storage bucket. Import errors will be written to a file in
+     * this bucket, one per line, as a JSON-encoded
+     * `google.rpc.Status` message.
+     * </pre>
+     *
+     * <code>string gcs_prefix = 1;</code>
+     *
+     * @param value The gcsPrefix to set.
+     * @return This builder for chaining.
+     */
+    public Builder setGcsPrefix(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      destinationCase_ = 1;
+      destination_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Google Cloud Storage path for import errors. This must be an empty,
+     * existing Cloud Storage bucket. Import errors will be written to a file in
+     * this bucket, one per line, as a JSON-encoded
+     * `google.rpc.Status` message.
+     * </pre>
+     *
+     * <code>string gcs_prefix = 1;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearGcsPrefix() {
+      if (destinationCase_ == 1) {
+        destinationCase_ = 0;
+        destination_ = null;
+        onChanged();
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Google Cloud Storage path for import errors. This must be an empty,
+     * existing Cloud Storage bucket. Import errors will be written to a file in
+     * this bucket, one per line, as a JSON-encoded
+     * `google.rpc.Status` message.
+     * </pre>
+     *
+     * <code>string gcs_prefix = 1;</code>
+     *
+     * @param value The bytes for gcsPrefix to set.
+     * @return This builder for chaining.
+     */
+    public Builder setGcsPrefixBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+      destinationCase_ = 1;
+      destination_ = value;
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.setUnknownFields(unknownFields);
+    }
+
+    @java.lang.Override
+    public final Builder mergeUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.mergeUnknownFields(unknownFields);
+    }
+
+    // @@protoc_insertion_point(builder_scope:google.cloud.retail.v2.ImportErrorsConfig)
+  }
+
+  // @@protoc_insertion_point(class_scope:google.cloud.retail.v2.ImportErrorsConfig)
+  private static final com.google.cloud.retail.v2.ImportErrorsConfig DEFAULT_INSTANCE;
+
+  static {
+    DEFAULT_INSTANCE = new com.google.cloud.retail.v2.ImportErrorsConfig();
+  }
+
+  public static com.google.cloud.retail.v2.ImportErrorsConfig getDefaultInstance() {
+    return DEFAULT_INSTANCE;
+  }
+
+  private static final com.google.protobuf.Parser<ImportErrorsConfig> PARSER =
+      new com.google.protobuf.AbstractParser<ImportErrorsConfig>() {
+        @java.lang.Override
+        public ImportErrorsConfig parsePartialFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws com.google.protobuf.InvalidProtocolBufferException {
+          return new ImportErrorsConfig(input, extensionRegistry);
+        }
+      };
+
+  public static com.google.protobuf.Parser<ImportErrorsConfig> parser() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.protobuf.Parser<ImportErrorsConfig> getParserForType() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.cloud.retail.v2.ImportErrorsConfig getDefaultInstanceForType() {
+    return DEFAULT_INSTANCE;
+  }
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ImportErrorsConfigOrBuilder.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ImportErrorsConfigOrBuilder.java
new file mode 100644
index 00000000..14cfa61b
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ImportErrorsConfigOrBuilder.java
@@ -0,0 +1,58 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/import_config.proto
+
+package com.google.cloud.retail.v2;
+
+public interface ImportErrorsConfigOrBuilder
+    extends
+    // @@protoc_insertion_point(interface_extends:google.cloud.retail.v2.ImportErrorsConfig)
+    com.google.protobuf.MessageOrBuilder {
+
+  /**
+   *
+   *
+   * <pre>
+   * Google Cloud Storage path for import errors. This must be an empty,
+   * existing Cloud Storage bucket. Import errors will be written to a file in
+   * this bucket, one per line, as a JSON-encoded
+   * `google.rpc.Status` message.
+   * </pre>
+   *
+   * <code>string gcs_prefix = 1;</code>
+   *
+   * @return The gcsPrefix.
+   */
+  java.lang.String getGcsPrefix();
+  /**
+   *
+   *
+   * <pre>
+   * Google Cloud Storage path for import errors. This must be an empty,
+   * existing Cloud Storage bucket. Import errors will be written to a file in
+   * this bucket, one per line, as a JSON-encoded
+   * `google.rpc.Status` message.
+   * </pre>
+   *
+   * <code>string gcs_prefix = 1;</code>
+   *
+   * @return The bytes for gcsPrefix.
+   */
+  com.google.protobuf.ByteString getGcsPrefixBytes();
+
+  public com.google.cloud.retail.v2.ImportErrorsConfig.DestinationCase getDestinationCase();
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ImportMetadata.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ImportMetadata.java
new file mode 100644
index 00000000..1b971787
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ImportMetadata.java
@@ -0,0 +1,1192 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/import_config.proto
+
+package com.google.cloud.retail.v2;
+
+/**
+ *
+ *
+ * <pre>
+ * Metadata related to the progress of the Import operation. This will be
+ * returned by the google.longrunning.Operation.metadata field.
+ * </pre>
+ *
+ * Protobuf type {@code google.cloud.retail.v2.ImportMetadata}
+ */
+public final class ImportMetadata extends com.google.protobuf.GeneratedMessageV3
+    implements
+    // @@protoc_insertion_point(message_implements:google.cloud.retail.v2.ImportMetadata)
+    ImportMetadataOrBuilder {
+  private static final long serialVersionUID = 0L;
+  // Use ImportMetadata.newBuilder() to construct.
+  private ImportMetadata(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+    super(builder);
+  }
+
+  private ImportMetadata() {}
+
+  @java.lang.Override
+  @SuppressWarnings({"unused"})
+  protected java.lang.Object newInstance(UnusedPrivateParameter unused) {
+    return new ImportMetadata();
+  }
+
+  @java.lang.Override
+  public final com.google.protobuf.UnknownFieldSet getUnknownFields() {
+    return this.unknownFields;
+  }
+
+  private ImportMetadata(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    this();
+    if (extensionRegistry == null) {
+      throw new java.lang.NullPointerException();
+    }
+    com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+        com.google.protobuf.UnknownFieldSet.newBuilder();
+    try {
+      boolean done = false;
+      while (!done) {
+        int tag = input.readTag();
+        switch (tag) {
+          case 0:
+            done = true;
+            break;
+          case 10:
+            {
+              com.google.protobuf.Timestamp.Builder subBuilder = null;
+              if (createTime_ != null) {
+                subBuilder = createTime_.toBuilder();
+              }
+              createTime_ =
+                  input.readMessage(com.google.protobuf.Timestamp.parser(), extensionRegistry);
+              if (subBuilder != null) {
+                subBuilder.mergeFrom(createTime_);
+                createTime_ = subBuilder.buildPartial();
+              }
+
+              break;
+            }
+          case 18:
+            {
+              com.google.protobuf.Timestamp.Builder subBuilder = null;
+              if (updateTime_ != null) {
+                subBuilder = updateTime_.toBuilder();
+              }
+              updateTime_ =
+                  input.readMessage(com.google.protobuf.Timestamp.parser(), extensionRegistry);
+              if (subBuilder != null) {
+                subBuilder.mergeFrom(updateTime_);
+                updateTime_ = subBuilder.buildPartial();
+              }
+
+              break;
+            }
+          case 24:
+            {
+              successCount_ = input.readInt64();
+              break;
+            }
+          case 32:
+            {
+              failureCount_ = input.readInt64();
+              break;
+            }
+          default:
+            {
+              if (!parseUnknownField(input, unknownFields, extensionRegistry, tag)) {
+                done = true;
+              }
+              break;
+            }
+        }
+      }
+    } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+      throw e.setUnfinishedMessage(this);
+    } catch (java.io.IOException e) {
+      throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
+    } finally {
+      this.unknownFields = unknownFields.build();
+      makeExtensionsImmutable();
+    }
+  }
+
+  public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+    return com.google.cloud.retail.v2.ImportConfigProto
+        .internal_static_google_cloud_retail_v2_ImportMetadata_descriptor;
+  }
+
+  @java.lang.Override
+  protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internalGetFieldAccessorTable() {
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+        .ensureFieldAccessorsInitialized(
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+  /**
+   *
+   *
+   * <pre>
+   * Operation create time.
+   * </pre>
+   *
+   * <code>.google.protobuf.Timestamp create_time = 1;</code>
+   *
+   * @return Whether the createTime field is set.
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+   *
+   * <pre>
+   * Operation create time.
+   * </pre>
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+   * <code>.google.protobuf.Timestamp create_time = 1;</code>
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+   *
+   * <pre>
+   * Operation create time.
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+   *
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+   *
+   * <pre>
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+   * <code>.google.protobuf.Timestamp update_time = 2;</code>
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+  public boolean hasUpdateTime() {
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+   *
+   * <pre>
+   * Operation last update time. If the operation is done, this is also the
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+   *
+   * <code>.google.protobuf.Timestamp update_time = 2;</code>
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+   * <code>.google.protobuf.Timestamp update_time = 2;</code>
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+  @java.lang.Override
+  public com.google.protobuf.TimestampOrBuilder getUpdateTimeOrBuilder() {
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+  public static final int SUCCESS_COUNT_FIELD_NUMBER = 3;
+  private long successCount_;
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+   *
+   *
+   * <pre>
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+   * </pre>
+   *
+   * <code>int64 success_count = 3;</code>
+   *
+   * @return The successCount.
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+  public long getSuccessCount() {
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+
+  public static final int FAILURE_COUNT_FIELD_NUMBER = 4;
+  private long failureCount_;
+  /**
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+   *
+   * <pre>
+   * Count of entries that encountered errors while processing.
+   * </pre>
+   *
+   * <code>int64 failure_count = 4;</code>
+   *
+   * @return The failureCount.
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+  @java.lang.Override
+  public long getFailureCount() {
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+    if (failureCount_ != 0L) {
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+  }
+
+  @java.lang.Override
+  public int getSerializedSize() {
+    int size = memoizedSize;
+    if (size != -1) return size;
+
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+    size += unknownFields.getSerializedSize();
+    memoizedSize = size;
+    return size;
+  }
+
+  @java.lang.Override
+  public boolean equals(final java.lang.Object obj) {
+    if (obj == this) {
+      return true;
+    }
+    if (!(obj instanceof com.google.cloud.retail.v2.ImportMetadata)) {
+      return super.equals(obj);
+    }
+    com.google.cloud.retail.v2.ImportMetadata other =
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+
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+    if (getSuccessCount() != other.getSuccessCount()) return false;
+    if (getFailureCount() != other.getFailureCount()) return false;
+    if (!unknownFields.equals(other.unknownFields)) return false;
+    return true;
+  }
+
+  @java.lang.Override
+  public int hashCode() {
+    if (memoizedHashCode != 0) {
+      return memoizedHashCode;
+    }
+    int hash = 41;
+    hash = (19 * hash) + getDescriptor().hashCode();
+    if (hasCreateTime()) {
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+    hash = (29 * hash) + unknownFields.hashCode();
+    memoizedHashCode = hash;
+    return hash;
+  }
+
+  public static com.google.cloud.retail.v2.ImportMetadata parseFrom(java.nio.ByteBuffer data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.ImportMetadata parseFrom(
+      java.nio.ByteBuffer data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.ImportMetadata parseFrom(
+      com.google.protobuf.ByteString data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.ImportMetadata parseFrom(
+      com.google.protobuf.ByteString data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.ImportMetadata parseFrom(byte[] data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.ImportMetadata parseFrom(
+      byte[] data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.ImportMetadata parseFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.ImportMetadata parseFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.ImportMetadata parseDelimitedFrom(
+      java.io.InputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.ImportMetadata parseDelimitedFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.ImportMetadata parseFrom(
+      com.google.protobuf.CodedInputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.ImportMetadata parseFrom(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  @java.lang.Override
+  public Builder newBuilderForType() {
+    return newBuilder();
+  }
+
+  public static Builder newBuilder() {
+    return DEFAULT_INSTANCE.toBuilder();
+  }
+
+  public static Builder newBuilder(com.google.cloud.retail.v2.ImportMetadata prototype) {
+    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+  }
+
+  @java.lang.Override
+  public Builder toBuilder() {
+    return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
+  }
+
+  @java.lang.Override
+  protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+    Builder builder = new Builder(parent);
+    return builder;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Metadata related to the progress of the Import operation. This will be
+   * returned by the google.longrunning.Operation.metadata field.
+   * </pre>
+   *
+   * Protobuf type {@code google.cloud.retail.v2.ImportMetadata}
+   */
+  public static final class Builder extends com.google.protobuf.GeneratedMessageV3.Builder<Builder>
+      implements
+      // @@protoc_insertion_point(builder_implements:google.cloud.retail.v2.ImportMetadata)
+      com.google.cloud.retail.v2.ImportMetadataOrBuilder {
+    public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+      return com.google.cloud.retail.v2.ImportConfigProto
+          .internal_static_google_cloud_retail_v2_ImportMetadata_descriptor;
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return com.google.cloud.retail.v2.ImportConfigProto
+          .internal_static_google_cloud_retail_v2_ImportMetadata_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              com.google.cloud.retail.v2.ImportMetadata.class,
+              com.google.cloud.retail.v2.ImportMetadata.Builder.class);
+    }
+
+    // Construct using com.google.cloud.retail.v2.ImportMetadata.newBuilder()
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
+
+    private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+      super(parent);
+      maybeForceBuilderInitialization();
+    }
+
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders) {}
+    }
+
+    @java.lang.Override
+    public Builder clear() {
+      super.clear();
+      if (createTimeBuilder_ == null) {
+        createTime_ = null;
+      } else {
+        createTime_ = null;
+        createTimeBuilder_ = null;
+      }
+      if (updateTimeBuilder_ == null) {
+        updateTime_ = null;
+      } else {
+        updateTime_ = null;
+        updateTimeBuilder_ = null;
+      }
+      successCount_ = 0L;
+
+      failureCount_ = 0L;
+
+      return this;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
+      return com.google.cloud.retail.v2.ImportConfigProto
+          .internal_static_google_cloud_retail_v2_ImportMetadata_descriptor;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.ImportMetadata getDefaultInstanceForType() {
+      return com.google.cloud.retail.v2.ImportMetadata.getDefaultInstance();
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.ImportMetadata build() {
+      com.google.cloud.retail.v2.ImportMetadata result = buildPartial();
+      if (!result.isInitialized()) {
+        throw newUninitializedMessageException(result);
+      }
+      return result;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.ImportMetadata buildPartial() {
+      com.google.cloud.retail.v2.ImportMetadata result =
+          new com.google.cloud.retail.v2.ImportMetadata(this);
+      if (createTimeBuilder_ == null) {
+        result.createTime_ = createTime_;
+      } else {
+        result.createTime_ = createTimeBuilder_.build();
+      }
+      if (updateTimeBuilder_ == null) {
+        result.updateTime_ = updateTime_;
+      } else {
+        result.updateTime_ = updateTimeBuilder_.build();
+      }
+      result.successCount_ = successCount_;
+      result.failureCount_ = failureCount_;
+      onBuilt();
+      return result;
+    }
+
+    @java.lang.Override
+    public Builder clone() {
+      return super.clone();
+    }
+
+    @java.lang.Override
+    public Builder setField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.setField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
+      return super.clearField(field);
+    }
+
+    @java.lang.Override
+    public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+      return super.clearOneof(oneof);
+    }
+
+    @java.lang.Override
+    public Builder setRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, int index, java.lang.Object value) {
+      return super.setRepeatedField(field, index, value);
+    }
+
+    @java.lang.Override
+    public Builder addRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.addRepeatedField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(com.google.protobuf.Message other) {
+      if (other instanceof com.google.cloud.retail.v2.ImportMetadata) {
+        return mergeFrom((com.google.cloud.retail.v2.ImportMetadata) other);
+      } else {
+        super.mergeFrom(other);
+        return this;
+      }
+    }
+
+    public Builder mergeFrom(com.google.cloud.retail.v2.ImportMetadata other) {
+      if (other == com.google.cloud.retail.v2.ImportMetadata.getDefaultInstance()) return this;
+      if (other.hasCreateTime()) {
+        mergeCreateTime(other.getCreateTime());
+      }
+      if (other.hasUpdateTime()) {
+        mergeUpdateTime(other.getUpdateTime());
+      }
+      if (other.getSuccessCount() != 0L) {
+        setSuccessCount(other.getSuccessCount());
+      }
+      if (other.getFailureCount() != 0L) {
+        setFailureCount(other.getFailureCount());
+      }
+      this.mergeUnknownFields(other.unknownFields);
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final boolean isInitialized() {
+      return true;
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      com.google.cloud.retail.v2.ImportMetadata parsedMessage = null;
+      try {
+        parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        parsedMessage = (com.google.cloud.retail.v2.ImportMetadata) e.getUnfinishedMessage();
+        throw e.unwrapIOException();
+      } finally {
+        if (parsedMessage != null) {
+          mergeFrom(parsedMessage);
+        }
+      }
+      return this;
+    }
+
+    private com.google.protobuf.Timestamp createTime_;
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.protobuf.Timestamp,
+            com.google.protobuf.Timestamp.Builder,
+            com.google.protobuf.TimestampOrBuilder>
+        createTimeBuilder_;
+    /**
+     *
+     *
+     * <pre>
+     * Operation create time.
+     * </pre>
+     *
+     * <code>.google.protobuf.Timestamp create_time = 1;</code>
+     *
+     * @return Whether the createTime field is set.
+     */
+    public boolean hasCreateTime() {
+      return createTimeBuilder_ != null || createTime_ != null;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Operation create time.
+     * </pre>
+     *
+     * <code>.google.protobuf.Timestamp create_time = 1;</code>
+     *
+     * @return The createTime.
+     */
+    public com.google.protobuf.Timestamp getCreateTime() {
+      if (createTimeBuilder_ == null) {
+        return createTime_ == null
+            ? com.google.protobuf.Timestamp.getDefaultInstance()
+            : createTime_;
+      } else {
+        return createTimeBuilder_.getMessage();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Operation create time.
+     * </pre>
+     *
+     * <code>.google.protobuf.Timestamp create_time = 1;</code>
+     */
+    public Builder setCreateTime(com.google.protobuf.Timestamp value) {
+      if (createTimeBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        createTime_ = value;
+        onChanged();
+      } else {
+        createTimeBuilder_.setMessage(value);
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Operation create time.
+     * </pre>
+     *
+     * <code>.google.protobuf.Timestamp create_time = 1;</code>
+     */
+    public Builder setCreateTime(com.google.protobuf.Timestamp.Builder builderForValue) {
+      if (createTimeBuilder_ == null) {
+        createTime_ = builderForValue.build();
+        onChanged();
+      } else {
+        createTimeBuilder_.setMessage(builderForValue.build());
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Operation create time.
+     * </pre>
+     *
+     * <code>.google.protobuf.Timestamp create_time = 1;</code>
+     */
+    public Builder mergeCreateTime(com.google.protobuf.Timestamp value) {
+      if (createTimeBuilder_ == null) {
+        if (createTime_ != null) {
+          createTime_ =
+              com.google.protobuf.Timestamp.newBuilder(createTime_).mergeFrom(value).buildPartial();
+        } else {
+          createTime_ = value;
+        }
+        onChanged();
+      } else {
+        createTimeBuilder_.mergeFrom(value);
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Operation create time.
+     * </pre>
+     *
+     * <code>.google.protobuf.Timestamp create_time = 1;</code>
+     */
+    public Builder clearCreateTime() {
+      if (createTimeBuilder_ == null) {
+        createTime_ = null;
+        onChanged();
+      } else {
+        createTime_ = null;
+        createTimeBuilder_ = null;
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Operation create time.
+     * </pre>
+     *
+     * <code>.google.protobuf.Timestamp create_time = 1;</code>
+     */
+    public com.google.protobuf.Timestamp.Builder getCreateTimeBuilder() {
+
+      onChanged();
+      return getCreateTimeFieldBuilder().getBuilder();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Operation create time.
+     * </pre>
+     *
+     * <code>.google.protobuf.Timestamp create_time = 1;</code>
+     */
+    public com.google.protobuf.TimestampOrBuilder getCreateTimeOrBuilder() {
+      if (createTimeBuilder_ != null) {
+        return createTimeBuilder_.getMessageOrBuilder();
+      } else {
+        return createTime_ == null
+            ? com.google.protobuf.Timestamp.getDefaultInstance()
+            : createTime_;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Operation create time.
+     * </pre>
+     *
+     * <code>.google.protobuf.Timestamp create_time = 1;</code>
+     */
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.protobuf.Timestamp,
+            com.google.protobuf.Timestamp.Builder,
+            com.google.protobuf.TimestampOrBuilder>
+        getCreateTimeFieldBuilder() {
+      if (createTimeBuilder_ == null) {
+        createTimeBuilder_ =
+            new com.google.protobuf.SingleFieldBuilderV3<
+                com.google.protobuf.Timestamp,
+                com.google.protobuf.Timestamp.Builder,
+                com.google.protobuf.TimestampOrBuilder>(
+                getCreateTime(), getParentForChildren(), isClean());
+        createTime_ = null;
+      }
+      return createTimeBuilder_;
+    }
+
+    private com.google.protobuf.Timestamp updateTime_;
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.protobuf.Timestamp,
+            com.google.protobuf.Timestamp.Builder,
+            com.google.protobuf.TimestampOrBuilder>
+        updateTimeBuilder_;
+    /**
+     *
+     *
+     * <pre>
+     * Operation last update time. If the operation is done, this is also the
+     * finish time.
+     * </pre>
+     *
+     * <code>.google.protobuf.Timestamp update_time = 2;</code>
+     *
+     * @return Whether the updateTime field is set.
+     */
+    public boolean hasUpdateTime() {
+      return updateTimeBuilder_ != null || updateTime_ != null;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Operation last update time. If the operation is done, this is also the
+     * finish time.
+     * </pre>
+     *
+     * <code>.google.protobuf.Timestamp update_time = 2;</code>
+     *
+     * @return The updateTime.
+     */
+    public com.google.protobuf.Timestamp getUpdateTime() {
+      if (updateTimeBuilder_ == null) {
+        return updateTime_ == null
+            ? com.google.protobuf.Timestamp.getDefaultInstance()
+            : updateTime_;
+      } else {
+        return updateTimeBuilder_.getMessage();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Operation last update time. If the operation is done, this is also the
+     * finish time.
+     * </pre>
+     *
+     * <code>.google.protobuf.Timestamp update_time = 2;</code>
+     */
+    public Builder setUpdateTime(com.google.protobuf.Timestamp value) {
+      if (updateTimeBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        updateTime_ = value;
+        onChanged();
+      } else {
+        updateTimeBuilder_.setMessage(value);
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Operation last update time. If the operation is done, this is also the
+     * finish time.
+     * </pre>
+     *
+     * <code>.google.protobuf.Timestamp update_time = 2;</code>
+     */
+    public Builder setUpdateTime(com.google.protobuf.Timestamp.Builder builderForValue) {
+      if (updateTimeBuilder_ == null) {
+        updateTime_ = builderForValue.build();
+        onChanged();
+      } else {
+        updateTimeBuilder_.setMessage(builderForValue.build());
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Operation last update time. If the operation is done, this is also the
+     * finish time.
+     * </pre>
+     *
+     * <code>.google.protobuf.Timestamp update_time = 2;</code>
+     */
+    public Builder mergeUpdateTime(com.google.protobuf.Timestamp value) {
+      if (updateTimeBuilder_ == null) {
+        if (updateTime_ != null) {
+          updateTime_ =
+              com.google.protobuf.Timestamp.newBuilder(updateTime_).mergeFrom(value).buildPartial();
+        } else {
+          updateTime_ = value;
+        }
+        onChanged();
+      } else {
+        updateTimeBuilder_.mergeFrom(value);
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Operation last update time. If the operation is done, this is also the
+     * finish time.
+     * </pre>
+     *
+     * <code>.google.protobuf.Timestamp update_time = 2;</code>
+     */
+    public Builder clearUpdateTime() {
+      if (updateTimeBuilder_ == null) {
+        updateTime_ = null;
+        onChanged();
+      } else {
+        updateTime_ = null;
+        updateTimeBuilder_ = null;
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Operation last update time. If the operation is done, this is also the
+     * finish time.
+     * </pre>
+     *
+     * <code>.google.protobuf.Timestamp update_time = 2;</code>
+     */
+    public com.google.protobuf.Timestamp.Builder getUpdateTimeBuilder() {
+
+      onChanged();
+      return getUpdateTimeFieldBuilder().getBuilder();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Operation last update time. If the operation is done, this is also the
+     * finish time.
+     * </pre>
+     *
+     * <code>.google.protobuf.Timestamp update_time = 2;</code>
+     */
+    public com.google.protobuf.TimestampOrBuilder getUpdateTimeOrBuilder() {
+      if (updateTimeBuilder_ != null) {
+        return updateTimeBuilder_.getMessageOrBuilder();
+      } else {
+        return updateTime_ == null
+            ? com.google.protobuf.Timestamp.getDefaultInstance()
+            : updateTime_;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Operation last update time. If the operation is done, this is also the
+     * finish time.
+     * </pre>
+     *
+     * <code>.google.protobuf.Timestamp update_time = 2;</code>
+     */
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.protobuf.Timestamp,
+            com.google.protobuf.Timestamp.Builder,
+            com.google.protobuf.TimestampOrBuilder>
+        getUpdateTimeFieldBuilder() {
+      if (updateTimeBuilder_ == null) {
+        updateTimeBuilder_ =
+            new com.google.protobuf.SingleFieldBuilderV3<
+                com.google.protobuf.Timestamp,
+                com.google.protobuf.Timestamp.Builder,
+                com.google.protobuf.TimestampOrBuilder>(
+                getUpdateTime(), getParentForChildren(), isClean());
+        updateTime_ = null;
+      }
+      return updateTimeBuilder_;
+    }
+
+    private long successCount_;
+    /**
+     *
+     *
+     * <pre>
+     * Count of entries that were processed successfully.
+     * </pre>
+     *
+     * <code>int64 success_count = 3;</code>
+     *
+     * @return The successCount.
+     */
+    @java.lang.Override
+    public long getSuccessCount() {
+      return successCount_;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Count of entries that were processed successfully.
+     * </pre>
+     *
+     * <code>int64 success_count = 3;</code>
+     *
+     * @param value The successCount to set.
+     * @return This builder for chaining.
+     */
+    public Builder setSuccessCount(long value) {
+
+      successCount_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Count of entries that were processed successfully.
+     * </pre>
+     *
+     * <code>int64 success_count = 3;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearSuccessCount() {
+
+      successCount_ = 0L;
+      onChanged();
+      return this;
+    }
+
+    private long failureCount_;
+    /**
+     *
+     *
+     * <pre>
+     * Count of entries that encountered errors while processing.
+     * </pre>
+     *
+     * <code>int64 failure_count = 4;</code>
+     *
+     * @return The failureCount.
+     */
+    @java.lang.Override
+    public long getFailureCount() {
+      return failureCount_;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Count of entries that encountered errors while processing.
+     * </pre>
+     *
+     * <code>int64 failure_count = 4;</code>
+     *
+     * @param value The failureCount to set.
+     * @return This builder for chaining.
+     */
+    public Builder setFailureCount(long value) {
+
+      failureCount_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Count of entries that encountered errors while processing.
+     * </pre>
+     *
+     * <code>int64 failure_count = 4;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearFailureCount() {
+
+      failureCount_ = 0L;
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.setUnknownFields(unknownFields);
+    }
+
+    @java.lang.Override
+    public final Builder mergeUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.mergeUnknownFields(unknownFields);
+    }
+
+    // @@protoc_insertion_point(builder_scope:google.cloud.retail.v2.ImportMetadata)
+  }
+
+  // @@protoc_insertion_point(class_scope:google.cloud.retail.v2.ImportMetadata)
+  private static final com.google.cloud.retail.v2.ImportMetadata DEFAULT_INSTANCE;
+
+  static {
+    DEFAULT_INSTANCE = new com.google.cloud.retail.v2.ImportMetadata();
+  }
+
+  public static com.google.cloud.retail.v2.ImportMetadata getDefaultInstance() {
+    return DEFAULT_INSTANCE;
+  }
+
+  private static final com.google.protobuf.Parser<ImportMetadata> PARSER =
+      new com.google.protobuf.AbstractParser<ImportMetadata>() {
+        @java.lang.Override
+        public ImportMetadata parsePartialFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws com.google.protobuf.InvalidProtocolBufferException {
+          return new ImportMetadata(input, extensionRegistry);
+        }
+      };
+
+  public static com.google.protobuf.Parser<ImportMetadata> parser() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.protobuf.Parser<ImportMetadata> getParserForType() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.cloud.retail.v2.ImportMetadata getDefaultInstanceForType() {
+    return DEFAULT_INSTANCE;
+  }
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ImportMetadataOrBuilder.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ImportMetadataOrBuilder.java
new file mode 100644
index 00000000..2fcb4274
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ImportMetadataOrBuilder.java
@@ -0,0 +1,124 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/import_config.proto
+
+package com.google.cloud.retail.v2;
+
+public interface ImportMetadataOrBuilder
+    extends
+    // @@protoc_insertion_point(interface_extends:google.cloud.retail.v2.ImportMetadata)
+    com.google.protobuf.MessageOrBuilder {
+
+  /**
+   *
+   *
+   * <pre>
+   * Operation create time.
+   * </pre>
+   *
+   * <code>.google.protobuf.Timestamp create_time = 1;</code>
+   *
+   * @return Whether the createTime field is set.
+   */
+  boolean hasCreateTime();
+  /**
+   *
+   *
+   * <pre>
+   * Operation create time.
+   * </pre>
+   *
+   * <code>.google.protobuf.Timestamp create_time = 1;</code>
+   *
+   * @return The createTime.
+   */
+  com.google.protobuf.Timestamp getCreateTime();
+  /**
+   *
+   *
+   * <pre>
+   * Operation create time.
+   * </pre>
+   *
+   * <code>.google.protobuf.Timestamp create_time = 1;</code>
+   */
+  com.google.protobuf.TimestampOrBuilder getCreateTimeOrBuilder();
+
+  /**
+   *
+   *
+   * <pre>
+   * Operation last update time. If the operation is done, this is also the
+   * finish time.
+   * </pre>
+   *
+   * <code>.google.protobuf.Timestamp update_time = 2;</code>
+   *
+   * @return Whether the updateTime field is set.
+   */
+  boolean hasUpdateTime();
+  /**
+   *
+   *
+   * <pre>
+   * Operation last update time. If the operation is done, this is also the
+   * finish time.
+   * </pre>
+   *
+   * <code>.google.protobuf.Timestamp update_time = 2;</code>
+   *
+   * @return The updateTime.
+   */
+  com.google.protobuf.Timestamp getUpdateTime();
+  /**
+   *
+   *
+   * <pre>
+   * Operation last update time. If the operation is done, this is also the
+   * finish time.
+   * </pre>
+   *
+   * <code>.google.protobuf.Timestamp update_time = 2;</code>
+   */
+  com.google.protobuf.TimestampOrBuilder getUpdateTimeOrBuilder();
+
+  /**
+   *
+   *
+   * <pre>
+   * Count of entries that were processed successfully.
+   * </pre>
+   *
+   * <code>int64 success_count = 3;</code>
+   *
+   * @return The successCount.
+   */
+  long getSuccessCount();
+
+  /**
+   *
+   *
+   * <pre>
+   * Count of entries that encountered errors while processing.
+   * </pre>
+   *
+   * <code>int64 failure_count = 4;</code>
+   *
+   * @return The failureCount.
+   */
+  long getFailureCount();
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ImportProductsRequest.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ImportProductsRequest.java
new file mode 100644
index 00000000..51e1e8e0
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ImportProductsRequest.java
@@ -0,0 +1,1520 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/import_config.proto
+
+package com.google.cloud.retail.v2;
+
+/**
+ *
+ *
+ * <pre>
+ * Request message for Import methods.
+ * </pre>
+ *
+ * Protobuf type {@code google.cloud.retail.v2.ImportProductsRequest}
+ */
+public final class ImportProductsRequest extends com.google.protobuf.GeneratedMessageV3
+    implements
+    // @@protoc_insertion_point(message_implements:google.cloud.retail.v2.ImportProductsRequest)
+    ImportProductsRequestOrBuilder {
+  private static final long serialVersionUID = 0L;
+  // Use ImportProductsRequest.newBuilder() to construct.
+  private ImportProductsRequest(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+    super(builder);
+  }
+
+  private ImportProductsRequest() {
+    parent_ = "";
+  }
+
+  @java.lang.Override
+  @SuppressWarnings({"unused"})
+  protected java.lang.Object newInstance(UnusedPrivateParameter unused) {
+    return new ImportProductsRequest();
+  }
+
+  @java.lang.Override
+  public final com.google.protobuf.UnknownFieldSet getUnknownFields() {
+    return this.unknownFields;
+  }
+
+  private ImportProductsRequest(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    this();
+    if (extensionRegistry == null) {
+      throw new java.lang.NullPointerException();
+    }
+    com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+        com.google.protobuf.UnknownFieldSet.newBuilder();
+    try {
+      boolean done = false;
+      while (!done) {
+        int tag = input.readTag();
+        switch (tag) {
+          case 0:
+            done = true;
+            break;
+          case 10:
+            {
+              java.lang.String s = input.readStringRequireUtf8();
+
+              parent_ = s;
+              break;
+            }
+          case 18:
+            {
+              com.google.cloud.retail.v2.ProductInputConfig.Builder subBuilder = null;
+              if (inputConfig_ != null) {
+                subBuilder = inputConfig_.toBuilder();
+              }
+              inputConfig_ =
+                  input.readMessage(
+                      com.google.cloud.retail.v2.ProductInputConfig.parser(), extensionRegistry);
+              if (subBuilder != null) {
+                subBuilder.mergeFrom(inputConfig_);
+                inputConfig_ = subBuilder.buildPartial();
+              }
+
+              break;
+            }
+          case 26:
+            {
+              com.google.cloud.retail.v2.ImportErrorsConfig.Builder subBuilder = null;
+              if (errorsConfig_ != null) {
+                subBuilder = errorsConfig_.toBuilder();
+              }
+              errorsConfig_ =
+                  input.readMessage(
+                      com.google.cloud.retail.v2.ImportErrorsConfig.parser(), extensionRegistry);
+              if (subBuilder != null) {
+                subBuilder.mergeFrom(errorsConfig_);
+                errorsConfig_ = subBuilder.buildPartial();
+              }
+
+              break;
+            }
+          case 34:
+            {
+              com.google.protobuf.FieldMask.Builder subBuilder = null;
+              if (updateMask_ != null) {
+                subBuilder = updateMask_.toBuilder();
+              }
+              updateMask_ =
+                  input.readMessage(com.google.protobuf.FieldMask.parser(), extensionRegistry);
+              if (subBuilder != null) {
+                subBuilder.mergeFrom(updateMask_);
+                updateMask_ = subBuilder.buildPartial();
+              }
+
+              break;
+            }
+          default:
+            {
+              if (!parseUnknownField(input, unknownFields, extensionRegistry, tag)) {
+                done = true;
+              }
+              break;
+            }
+        }
+      }
+    } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+      throw e.setUnfinishedMessage(this);
+    } catch (java.io.IOException e) {
+      throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
+    } finally {
+      this.unknownFields = unknownFields.build();
+      makeExtensionsImmutable();
+    }
+  }
+
+  public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+    return com.google.cloud.retail.v2.ImportConfigProto
+        .internal_static_google_cloud_retail_v2_ImportProductsRequest_descriptor;
+  }
+
+  @java.lang.Override
+  protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internalGetFieldAccessorTable() {
+    return com.google.cloud.retail.v2.ImportConfigProto
+        .internal_static_google_cloud_retail_v2_ImportProductsRequest_fieldAccessorTable
+        .ensureFieldAccessorsInitialized(
+            com.google.cloud.retail.v2.ImportProductsRequest.class,
+            com.google.cloud.retail.v2.ImportProductsRequest.Builder.class);
+  }
+
+  public static final int PARENT_FIELD_NUMBER = 1;
+  private volatile java.lang.Object parent_;
+  /**
+   *
+   *
+   * <pre>
+   * Required.
+   * "projects/1234/locations/global/catalogs/default_catalog/branches/default_branch"
+   * If no updateMask is specified, requires products.create permission.
+   * If updateMask is specified, requires products.update permission.
+   * </pre>
+   *
+   * <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The parent.
+   */
+  @java.lang.Override
+  public java.lang.String getParent() {
+    java.lang.Object ref = parent_;
+    if (ref instanceof java.lang.String) {
+      return (java.lang.String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+      java.lang.String s = bs.toStringUtf8();
+      parent_ = s;
+      return s;
+    }
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Required.
+   * "projects/1234/locations/global/catalogs/default_catalog/branches/default_branch"
+   * If no updateMask is specified, requires products.create permission.
+   * If updateMask is specified, requires products.update permission.
+   * </pre>
+   *
+   * <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The bytes for parent.
+   */
+  @java.lang.Override
+  public com.google.protobuf.ByteString getParentBytes() {
+    java.lang.Object ref = parent_;
+    if (ref instanceof java.lang.String) {
+      com.google.protobuf.ByteString b =
+          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+      parent_ = b;
+      return b;
+    } else {
+      return (com.google.protobuf.ByteString) ref;
+    }
+  }
+
+  public static final int INPUT_CONFIG_FIELD_NUMBER = 2;
+  private com.google.cloud.retail.v2.ProductInputConfig inputConfig_;
+  /**
+   *
+   *
+   * <pre>
+   * Required. The desired input location of the data.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.retail.v2.ProductInputConfig input_config = 2 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   *
+   * @return Whether the inputConfig field is set.
+   */
+  @java.lang.Override
+  public boolean hasInputConfig() {
+    return inputConfig_ != null;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Required. The desired input location of the data.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.retail.v2.ProductInputConfig input_config = 2 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   *
+   * @return The inputConfig.
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.ProductInputConfig getInputConfig() {
+    return inputConfig_ == null
+        ? com.google.cloud.retail.v2.ProductInputConfig.getDefaultInstance()
+        : inputConfig_;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Required. The desired input location of the data.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.retail.v2.ProductInputConfig input_config = 2 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.ProductInputConfigOrBuilder getInputConfigOrBuilder() {
+    return getInputConfig();
+  }
+
+  public static final int ERRORS_CONFIG_FIELD_NUMBER = 3;
+  private com.google.cloud.retail.v2.ImportErrorsConfig errorsConfig_;
+  /**
+   *
+   *
+   * <pre>
+   * The desired location of errors incurred during the Import.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.ImportErrorsConfig errors_config = 3;</code>
+   *
+   * @return Whether the errorsConfig field is set.
+   */
+  @java.lang.Override
+  public boolean hasErrorsConfig() {
+    return errorsConfig_ != null;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * The desired location of errors incurred during the Import.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.ImportErrorsConfig errors_config = 3;</code>
+   *
+   * @return The errorsConfig.
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.ImportErrorsConfig getErrorsConfig() {
+    return errorsConfig_ == null
+        ? com.google.cloud.retail.v2.ImportErrorsConfig.getDefaultInstance()
+        : errorsConfig_;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * The desired location of errors incurred during the Import.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.ImportErrorsConfig errors_config = 3;</code>
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.ImportErrorsConfigOrBuilder getErrorsConfigOrBuilder() {
+    return getErrorsConfig();
+  }
+
+  public static final int UPDATE_MASK_FIELD_NUMBER = 4;
+  private com.google.protobuf.FieldMask updateMask_;
+  /**
+   *
+   *
+   * <pre>
+   * Indicates which fields in the provided imported 'products' to update. If
+   * not set, will by default update all fields.
+   * </pre>
+   *
+   * <code>.google.protobuf.FieldMask update_mask = 4;</code>
+   *
+   * @return Whether the updateMask field is set.
+   */
+  @java.lang.Override
+  public boolean hasUpdateMask() {
+    return updateMask_ != null;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Indicates which fields in the provided imported 'products' to update. If
+   * not set, will by default update all fields.
+   * </pre>
+   *
+   * <code>.google.protobuf.FieldMask update_mask = 4;</code>
+   *
+   * @return The updateMask.
+   */
+  @java.lang.Override
+  public com.google.protobuf.FieldMask getUpdateMask() {
+    return updateMask_ == null ? com.google.protobuf.FieldMask.getDefaultInstance() : updateMask_;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Indicates which fields in the provided imported 'products' to update. If
+   * not set, will by default update all fields.
+   * </pre>
+   *
+   * <code>.google.protobuf.FieldMask update_mask = 4;</code>
+   */
+  @java.lang.Override
+  public com.google.protobuf.FieldMaskOrBuilder getUpdateMaskOrBuilder() {
+    return getUpdateMask();
+  }
+
+  private byte memoizedIsInitialized = -1;
+
+  @java.lang.Override
+  public final boolean isInitialized() {
+    byte isInitialized = memoizedIsInitialized;
+    if (isInitialized == 1) return true;
+    if (isInitialized == 0) return false;
+
+    memoizedIsInitialized = 1;
+    return true;
+  }
+
+  @java.lang.Override
+  public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
+    if (!getParentBytes().isEmpty()) {
+      com.google.protobuf.GeneratedMessageV3.writeString(output, 1, parent_);
+    }
+    if (inputConfig_ != null) {
+      output.writeMessage(2, getInputConfig());
+    }
+    if (errorsConfig_ != null) {
+      output.writeMessage(3, getErrorsConfig());
+    }
+    if (updateMask_ != null) {
+      output.writeMessage(4, getUpdateMask());
+    }
+    unknownFields.writeTo(output);
+  }
+
+  @java.lang.Override
+  public int getSerializedSize() {
+    int size = memoizedSize;
+    if (size != -1) return size;
+
+    size = 0;
+    if (!getParentBytes().isEmpty()) {
+      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(1, parent_);
+    }
+    if (inputConfig_ != null) {
+      size += com.google.protobuf.CodedOutputStream.computeMessageSize(2, getInputConfig());
+    }
+    if (errorsConfig_ != null) {
+      size += com.google.protobuf.CodedOutputStream.computeMessageSize(3, getErrorsConfig());
+    }
+    if (updateMask_ != null) {
+      size += com.google.protobuf.CodedOutputStream.computeMessageSize(4, getUpdateMask());
+    }
+    size += unknownFields.getSerializedSize();
+    memoizedSize = size;
+    return size;
+  }
+
+  @java.lang.Override
+  public boolean equals(final java.lang.Object obj) {
+    if (obj == this) {
+      return true;
+    }
+    if (!(obj instanceof com.google.cloud.retail.v2.ImportProductsRequest)) {
+      return super.equals(obj);
+    }
+    com.google.cloud.retail.v2.ImportProductsRequest other =
+        (com.google.cloud.retail.v2.ImportProductsRequest) obj;
+
+    if (!getParent().equals(other.getParent())) return false;
+    if (hasInputConfig() != other.hasInputConfig()) return false;
+    if (hasInputConfig()) {
+      if (!getInputConfig().equals(other.getInputConfig())) return false;
+    }
+    if (hasErrorsConfig() != other.hasErrorsConfig()) return false;
+    if (hasErrorsConfig()) {
+      if (!getErrorsConfig().equals(other.getErrorsConfig())) return false;
+    }
+    if (hasUpdateMask() != other.hasUpdateMask()) return false;
+    if (hasUpdateMask()) {
+      if (!getUpdateMask().equals(other.getUpdateMask())) return false;
+    }
+    if (!unknownFields.equals(other.unknownFields)) return false;
+    return true;
+  }
+
+  @java.lang.Override
+  public int hashCode() {
+    if (memoizedHashCode != 0) {
+      return memoizedHashCode;
+    }
+    int hash = 41;
+    hash = (19 * hash) + getDescriptor().hashCode();
+    hash = (37 * hash) + PARENT_FIELD_NUMBER;
+    hash = (53 * hash) + getParent().hashCode();
+    if (hasInputConfig()) {
+      hash = (37 * hash) + INPUT_CONFIG_FIELD_NUMBER;
+      hash = (53 * hash) + getInputConfig().hashCode();
+    }
+    if (hasErrorsConfig()) {
+      hash = (37 * hash) + ERRORS_CONFIG_FIELD_NUMBER;
+      hash = (53 * hash) + getErrorsConfig().hashCode();
+    }
+    if (hasUpdateMask()) {
+      hash = (37 * hash) + UPDATE_MASK_FIELD_NUMBER;
+      hash = (53 * hash) + getUpdateMask().hashCode();
+    }
+    hash = (29 * hash) + unknownFields.hashCode();
+    memoizedHashCode = hash;
+    return hash;
+  }
+
+  public static com.google.cloud.retail.v2.ImportProductsRequest parseFrom(java.nio.ByteBuffer data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.ImportProductsRequest parseFrom(
+      java.nio.ByteBuffer data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.ImportProductsRequest parseFrom(
+      com.google.protobuf.ByteString data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.ImportProductsRequest parseFrom(
+      com.google.protobuf.ByteString data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.ImportProductsRequest parseFrom(byte[] data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.ImportProductsRequest parseFrom(
+      byte[] data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.ImportProductsRequest parseFrom(
+      java.io.InputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.ImportProductsRequest parseFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.ImportProductsRequest parseDelimitedFrom(
+      java.io.InputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.ImportProductsRequest parseDelimitedFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.ImportProductsRequest parseFrom(
+      com.google.protobuf.CodedInputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.ImportProductsRequest parseFrom(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  @java.lang.Override
+  public Builder newBuilderForType() {
+    return newBuilder();
+  }
+
+  public static Builder newBuilder() {
+    return DEFAULT_INSTANCE.toBuilder();
+  }
+
+  public static Builder newBuilder(com.google.cloud.retail.v2.ImportProductsRequest prototype) {
+    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+  }
+
+  @java.lang.Override
+  public Builder toBuilder() {
+    return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
+  }
+
+  @java.lang.Override
+  protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+    Builder builder = new Builder(parent);
+    return builder;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Request message for Import methods.
+   * </pre>
+   *
+   * Protobuf type {@code google.cloud.retail.v2.ImportProductsRequest}
+   */
+  public static final class Builder extends com.google.protobuf.GeneratedMessageV3.Builder<Builder>
+      implements
+      // @@protoc_insertion_point(builder_implements:google.cloud.retail.v2.ImportProductsRequest)
+      com.google.cloud.retail.v2.ImportProductsRequestOrBuilder {
+    public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+      return com.google.cloud.retail.v2.ImportConfigProto
+          .internal_static_google_cloud_retail_v2_ImportProductsRequest_descriptor;
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return com.google.cloud.retail.v2.ImportConfigProto
+          .internal_static_google_cloud_retail_v2_ImportProductsRequest_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              com.google.cloud.retail.v2.ImportProductsRequest.class,
+              com.google.cloud.retail.v2.ImportProductsRequest.Builder.class);
+    }
+
+    // Construct using com.google.cloud.retail.v2.ImportProductsRequest.newBuilder()
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
+
+    private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+      super(parent);
+      maybeForceBuilderInitialization();
+    }
+
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders) {}
+    }
+
+    @java.lang.Override
+    public Builder clear() {
+      super.clear();
+      parent_ = "";
+
+      if (inputConfigBuilder_ == null) {
+        inputConfig_ = null;
+      } else {
+        inputConfig_ = null;
+        inputConfigBuilder_ = null;
+      }
+      if (errorsConfigBuilder_ == null) {
+        errorsConfig_ = null;
+      } else {
+        errorsConfig_ = null;
+        errorsConfigBuilder_ = null;
+      }
+      if (updateMaskBuilder_ == null) {
+        updateMask_ = null;
+      } else {
+        updateMask_ = null;
+        updateMaskBuilder_ = null;
+      }
+      return this;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
+      return com.google.cloud.retail.v2.ImportConfigProto
+          .internal_static_google_cloud_retail_v2_ImportProductsRequest_descriptor;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.ImportProductsRequest getDefaultInstanceForType() {
+      return com.google.cloud.retail.v2.ImportProductsRequest.getDefaultInstance();
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.ImportProductsRequest build() {
+      com.google.cloud.retail.v2.ImportProductsRequest result = buildPartial();
+      if (!result.isInitialized()) {
+        throw newUninitializedMessageException(result);
+      }
+      return result;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.ImportProductsRequest buildPartial() {
+      com.google.cloud.retail.v2.ImportProductsRequest result =
+          new com.google.cloud.retail.v2.ImportProductsRequest(this);
+      result.parent_ = parent_;
+      if (inputConfigBuilder_ == null) {
+        result.inputConfig_ = inputConfig_;
+      } else {
+        result.inputConfig_ = inputConfigBuilder_.build();
+      }
+      if (errorsConfigBuilder_ == null) {
+        result.errorsConfig_ = errorsConfig_;
+      } else {
+        result.errorsConfig_ = errorsConfigBuilder_.build();
+      }
+      if (updateMaskBuilder_ == null) {
+        result.updateMask_ = updateMask_;
+      } else {
+        result.updateMask_ = updateMaskBuilder_.build();
+      }
+      onBuilt();
+      return result;
+    }
+
+    @java.lang.Override
+    public Builder clone() {
+      return super.clone();
+    }
+
+    @java.lang.Override
+    public Builder setField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.setField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
+      return super.clearField(field);
+    }
+
+    @java.lang.Override
+    public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+      return super.clearOneof(oneof);
+    }
+
+    @java.lang.Override
+    public Builder setRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, int index, java.lang.Object value) {
+      return super.setRepeatedField(field, index, value);
+    }
+
+    @java.lang.Override
+    public Builder addRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.addRepeatedField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(com.google.protobuf.Message other) {
+      if (other instanceof com.google.cloud.retail.v2.ImportProductsRequest) {
+        return mergeFrom((com.google.cloud.retail.v2.ImportProductsRequest) other);
+      } else {
+        super.mergeFrom(other);
+        return this;
+      }
+    }
+
+    public Builder mergeFrom(com.google.cloud.retail.v2.ImportProductsRequest other) {
+      if (other == com.google.cloud.retail.v2.ImportProductsRequest.getDefaultInstance())
+        return this;
+      if (!other.getParent().isEmpty()) {
+        parent_ = other.parent_;
+        onChanged();
+      }
+      if (other.hasInputConfig()) {
+        mergeInputConfig(other.getInputConfig());
+      }
+      if (other.hasErrorsConfig()) {
+        mergeErrorsConfig(other.getErrorsConfig());
+      }
+      if (other.hasUpdateMask()) {
+        mergeUpdateMask(other.getUpdateMask());
+      }
+      this.mergeUnknownFields(other.unknownFields);
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final boolean isInitialized() {
+      return true;
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      com.google.cloud.retail.v2.ImportProductsRequest parsedMessage = null;
+      try {
+        parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        parsedMessage = (com.google.cloud.retail.v2.ImportProductsRequest) e.getUnfinishedMessage();
+        throw e.unwrapIOException();
+      } finally {
+        if (parsedMessage != null) {
+          mergeFrom(parsedMessage);
+        }
+      }
+      return this;
+    }
+
+    private java.lang.Object parent_ = "";
+    /**
+     *
+     *
+     * <pre>
+     * Required.
+     * "projects/1234/locations/global/catalogs/default_catalog/branches/default_branch"
+     * If no updateMask is specified, requires products.create permission.
+     * If updateMask is specified, requires products.update permission.
+     * </pre>
+     *
+     * <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @return The parent.
+     */
+    public java.lang.String getParent() {
+      java.lang.Object ref = parent_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        parent_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required.
+     * "projects/1234/locations/global/catalogs/default_catalog/branches/default_branch"
+     * If no updateMask is specified, requires products.create permission.
+     * If updateMask is specified, requires products.update permission.
+     * </pre>
+     *
+     * <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @return The bytes for parent.
+     */
+    public com.google.protobuf.ByteString getParentBytes() {
+      java.lang.Object ref = parent_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b =
+            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+        parent_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required.
+     * "projects/1234/locations/global/catalogs/default_catalog/branches/default_branch"
+     * If no updateMask is specified, requires products.create permission.
+     * If updateMask is specified, requires products.update permission.
+     * </pre>
+     *
+     * <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @param value The parent to set.
+     * @return This builder for chaining.
+     */
+    public Builder setParent(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+
+      parent_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required.
+     * "projects/1234/locations/global/catalogs/default_catalog/branches/default_branch"
+     * If no updateMask is specified, requires products.create permission.
+     * If updateMask is specified, requires products.update permission.
+     * </pre>
+     *
+     * <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearParent() {
+
+      parent_ = getDefaultInstance().getParent();
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required.
+     * "projects/1234/locations/global/catalogs/default_catalog/branches/default_branch"
+     * If no updateMask is specified, requires products.create permission.
+     * If updateMask is specified, requires products.update permission.
+     * </pre>
+     *
+     * <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @param value The bytes for parent to set.
+     * @return This builder for chaining.
+     */
+    public Builder setParentBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+
+      parent_ = value;
+      onChanged();
+      return this;
+    }
+
+    private com.google.cloud.retail.v2.ProductInputConfig inputConfig_;
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.cloud.retail.v2.ProductInputConfig,
+            com.google.cloud.retail.v2.ProductInputConfig.Builder,
+            com.google.cloud.retail.v2.ProductInputConfigOrBuilder>
+        inputConfigBuilder_;
+    /**
+     *
+     *
+     * <pre>
+     * Required. The desired input location of the data.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.ProductInputConfig input_config = 2 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     *
+     * @return Whether the inputConfig field is set.
+     */
+    public boolean hasInputConfig() {
+      return inputConfigBuilder_ != null || inputConfig_ != null;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The desired input location of the data.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.ProductInputConfig input_config = 2 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     *
+     * @return The inputConfig.
+     */
+    public com.google.cloud.retail.v2.ProductInputConfig getInputConfig() {
+      if (inputConfigBuilder_ == null) {
+        return inputConfig_ == null
+            ? com.google.cloud.retail.v2.ProductInputConfig.getDefaultInstance()
+            : inputConfig_;
+      } else {
+        return inputConfigBuilder_.getMessage();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The desired input location of the data.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.ProductInputConfig input_config = 2 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder setInputConfig(com.google.cloud.retail.v2.ProductInputConfig value) {
+      if (inputConfigBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        inputConfig_ = value;
+        onChanged();
+      } else {
+        inputConfigBuilder_.setMessage(value);
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The desired input location of the data.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.ProductInputConfig input_config = 2 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder setInputConfig(
+        com.google.cloud.retail.v2.ProductInputConfig.Builder builderForValue) {
+      if (inputConfigBuilder_ == null) {
+        inputConfig_ = builderForValue.build();
+        onChanged();
+      } else {
+        inputConfigBuilder_.setMessage(builderForValue.build());
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The desired input location of the data.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.ProductInputConfig input_config = 2 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder mergeInputConfig(com.google.cloud.retail.v2.ProductInputConfig value) {
+      if (inputConfigBuilder_ == null) {
+        if (inputConfig_ != null) {
+          inputConfig_ =
+              com.google.cloud.retail.v2.ProductInputConfig.newBuilder(inputConfig_)
+                  .mergeFrom(value)
+                  .buildPartial();
+        } else {
+          inputConfig_ = value;
+        }
+        onChanged();
+      } else {
+        inputConfigBuilder_.mergeFrom(value);
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The desired input location of the data.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.ProductInputConfig input_config = 2 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder clearInputConfig() {
+      if (inputConfigBuilder_ == null) {
+        inputConfig_ = null;
+        onChanged();
+      } else {
+        inputConfig_ = null;
+        inputConfigBuilder_ = null;
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The desired input location of the data.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.ProductInputConfig input_config = 2 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public com.google.cloud.retail.v2.ProductInputConfig.Builder getInputConfigBuilder() {
+
+      onChanged();
+      return getInputConfigFieldBuilder().getBuilder();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The desired input location of the data.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.ProductInputConfig input_config = 2 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public com.google.cloud.retail.v2.ProductInputConfigOrBuilder getInputConfigOrBuilder() {
+      if (inputConfigBuilder_ != null) {
+        return inputConfigBuilder_.getMessageOrBuilder();
+      } else {
+        return inputConfig_ == null
+            ? com.google.cloud.retail.v2.ProductInputConfig.getDefaultInstance()
+            : inputConfig_;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The desired input location of the data.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.ProductInputConfig input_config = 2 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.cloud.retail.v2.ProductInputConfig,
+            com.google.cloud.retail.v2.ProductInputConfig.Builder,
+            com.google.cloud.retail.v2.ProductInputConfigOrBuilder>
+        getInputConfigFieldBuilder() {
+      if (inputConfigBuilder_ == null) {
+        inputConfigBuilder_ =
+            new com.google.protobuf.SingleFieldBuilderV3<
+                com.google.cloud.retail.v2.ProductInputConfig,
+                com.google.cloud.retail.v2.ProductInputConfig.Builder,
+                com.google.cloud.retail.v2.ProductInputConfigOrBuilder>(
+                getInputConfig(), getParentForChildren(), isClean());
+        inputConfig_ = null;
+      }
+      return inputConfigBuilder_;
+    }
+
+    private com.google.cloud.retail.v2.ImportErrorsConfig errorsConfig_;
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.cloud.retail.v2.ImportErrorsConfig,
+            com.google.cloud.retail.v2.ImportErrorsConfig.Builder,
+            com.google.cloud.retail.v2.ImportErrorsConfigOrBuilder>
+        errorsConfigBuilder_;
+    /**
+     *
+     *
+     * <pre>
+     * The desired location of errors incurred during the Import.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.ImportErrorsConfig errors_config = 3;</code>
+     *
+     * @return Whether the errorsConfig field is set.
+     */
+    public boolean hasErrorsConfig() {
+      return errorsConfigBuilder_ != null || errorsConfig_ != null;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The desired location of errors incurred during the Import.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.ImportErrorsConfig errors_config = 3;</code>
+     *
+     * @return The errorsConfig.
+     */
+    public com.google.cloud.retail.v2.ImportErrorsConfig getErrorsConfig() {
+      if (errorsConfigBuilder_ == null) {
+        return errorsConfig_ == null
+            ? com.google.cloud.retail.v2.ImportErrorsConfig.getDefaultInstance()
+            : errorsConfig_;
+      } else {
+        return errorsConfigBuilder_.getMessage();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The desired location of errors incurred during the Import.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.ImportErrorsConfig errors_config = 3;</code>
+     */
+    public Builder setErrorsConfig(com.google.cloud.retail.v2.ImportErrorsConfig value) {
+      if (errorsConfigBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        errorsConfig_ = value;
+        onChanged();
+      } else {
+        errorsConfigBuilder_.setMessage(value);
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The desired location of errors incurred during the Import.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.ImportErrorsConfig errors_config = 3;</code>
+     */
+    public Builder setErrorsConfig(
+        com.google.cloud.retail.v2.ImportErrorsConfig.Builder builderForValue) {
+      if (errorsConfigBuilder_ == null) {
+        errorsConfig_ = builderForValue.build();
+        onChanged();
+      } else {
+        errorsConfigBuilder_.setMessage(builderForValue.build());
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The desired location of errors incurred during the Import.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.ImportErrorsConfig errors_config = 3;</code>
+     */
+    public Builder mergeErrorsConfig(com.google.cloud.retail.v2.ImportErrorsConfig value) {
+      if (errorsConfigBuilder_ == null) {
+        if (errorsConfig_ != null) {
+          errorsConfig_ =
+              com.google.cloud.retail.v2.ImportErrorsConfig.newBuilder(errorsConfig_)
+                  .mergeFrom(value)
+                  .buildPartial();
+        } else {
+          errorsConfig_ = value;
+        }
+        onChanged();
+      } else {
+        errorsConfigBuilder_.mergeFrom(value);
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The desired location of errors incurred during the Import.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.ImportErrorsConfig errors_config = 3;</code>
+     */
+    public Builder clearErrorsConfig() {
+      if (errorsConfigBuilder_ == null) {
+        errorsConfig_ = null;
+        onChanged();
+      } else {
+        errorsConfig_ = null;
+        errorsConfigBuilder_ = null;
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The desired location of errors incurred during the Import.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.ImportErrorsConfig errors_config = 3;</code>
+     */
+    public com.google.cloud.retail.v2.ImportErrorsConfig.Builder getErrorsConfigBuilder() {
+
+      onChanged();
+      return getErrorsConfigFieldBuilder().getBuilder();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The desired location of errors incurred during the Import.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.ImportErrorsConfig errors_config = 3;</code>
+     */
+    public com.google.cloud.retail.v2.ImportErrorsConfigOrBuilder getErrorsConfigOrBuilder() {
+      if (errorsConfigBuilder_ != null) {
+        return errorsConfigBuilder_.getMessageOrBuilder();
+      } else {
+        return errorsConfig_ == null
+            ? com.google.cloud.retail.v2.ImportErrorsConfig.getDefaultInstance()
+            : errorsConfig_;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The desired location of errors incurred during the Import.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.ImportErrorsConfig errors_config = 3;</code>
+     */
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.cloud.retail.v2.ImportErrorsConfig,
+            com.google.cloud.retail.v2.ImportErrorsConfig.Builder,
+            com.google.cloud.retail.v2.ImportErrorsConfigOrBuilder>
+        getErrorsConfigFieldBuilder() {
+      if (errorsConfigBuilder_ == null) {
+        errorsConfigBuilder_ =
+            new com.google.protobuf.SingleFieldBuilderV3<
+                com.google.cloud.retail.v2.ImportErrorsConfig,
+                com.google.cloud.retail.v2.ImportErrorsConfig.Builder,
+                com.google.cloud.retail.v2.ImportErrorsConfigOrBuilder>(
+                getErrorsConfig(), getParentForChildren(), isClean());
+        errorsConfig_ = null;
+      }
+      return errorsConfigBuilder_;
+    }
+
+    private com.google.protobuf.FieldMask updateMask_;
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.protobuf.FieldMask,
+            com.google.protobuf.FieldMask.Builder,
+            com.google.protobuf.FieldMaskOrBuilder>
+        updateMaskBuilder_;
+    /**
+     *
+     *
+     * <pre>
+     * Indicates which fields in the provided imported 'products' to update. If
+     * not set, will by default update all fields.
+     * </pre>
+     *
+     * <code>.google.protobuf.FieldMask update_mask = 4;</code>
+     *
+     * @return Whether the updateMask field is set.
+     */
+    public boolean hasUpdateMask() {
+      return updateMaskBuilder_ != null || updateMask_ != null;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Indicates which fields in the provided imported 'products' to update. If
+     * not set, will by default update all fields.
+     * </pre>
+     *
+     * <code>.google.protobuf.FieldMask update_mask = 4;</code>
+     *
+     * @return The updateMask.
+     */
+    public com.google.protobuf.FieldMask getUpdateMask() {
+      if (updateMaskBuilder_ == null) {
+        return updateMask_ == null
+            ? com.google.protobuf.FieldMask.getDefaultInstance()
+            : updateMask_;
+      } else {
+        return updateMaskBuilder_.getMessage();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Indicates which fields in the provided imported 'products' to update. If
+     * not set, will by default update all fields.
+     * </pre>
+     *
+     * <code>.google.protobuf.FieldMask update_mask = 4;</code>
+     */
+    public Builder setUpdateMask(com.google.protobuf.FieldMask value) {
+      if (updateMaskBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        updateMask_ = value;
+        onChanged();
+      } else {
+        updateMaskBuilder_.setMessage(value);
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Indicates which fields in the provided imported 'products' to update. If
+     * not set, will by default update all fields.
+     * </pre>
+     *
+     * <code>.google.protobuf.FieldMask update_mask = 4;</code>
+     */
+    public Builder setUpdateMask(com.google.protobuf.FieldMask.Builder builderForValue) {
+      if (updateMaskBuilder_ == null) {
+        updateMask_ = builderForValue.build();
+        onChanged();
+      } else {
+        updateMaskBuilder_.setMessage(builderForValue.build());
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Indicates which fields in the provided imported 'products' to update. If
+     * not set, will by default update all fields.
+     * </pre>
+     *
+     * <code>.google.protobuf.FieldMask update_mask = 4;</code>
+     */
+    public Builder mergeUpdateMask(com.google.protobuf.FieldMask value) {
+      if (updateMaskBuilder_ == null) {
+        if (updateMask_ != null) {
+          updateMask_ =
+              com.google.protobuf.FieldMask.newBuilder(updateMask_).mergeFrom(value).buildPartial();
+        } else {
+          updateMask_ = value;
+        }
+        onChanged();
+      } else {
+        updateMaskBuilder_.mergeFrom(value);
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Indicates which fields in the provided imported 'products' to update. If
+     * not set, will by default update all fields.
+     * </pre>
+     *
+     * <code>.google.protobuf.FieldMask update_mask = 4;</code>
+     */
+    public Builder clearUpdateMask() {
+      if (updateMaskBuilder_ == null) {
+        updateMask_ = null;
+        onChanged();
+      } else {
+        updateMask_ = null;
+        updateMaskBuilder_ = null;
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Indicates which fields in the provided imported 'products' to update. If
+     * not set, will by default update all fields.
+     * </pre>
+     *
+     * <code>.google.protobuf.FieldMask update_mask = 4;</code>
+     */
+    public com.google.protobuf.FieldMask.Builder getUpdateMaskBuilder() {
+
+      onChanged();
+      return getUpdateMaskFieldBuilder().getBuilder();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Indicates which fields in the provided imported 'products' to update. If
+     * not set, will by default update all fields.
+     * </pre>
+     *
+     * <code>.google.protobuf.FieldMask update_mask = 4;</code>
+     */
+    public com.google.protobuf.FieldMaskOrBuilder getUpdateMaskOrBuilder() {
+      if (updateMaskBuilder_ != null) {
+        return updateMaskBuilder_.getMessageOrBuilder();
+      } else {
+        return updateMask_ == null
+            ? com.google.protobuf.FieldMask.getDefaultInstance()
+            : updateMask_;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Indicates which fields in the provided imported 'products' to update. If
+     * not set, will by default update all fields.
+     * </pre>
+     *
+     * <code>.google.protobuf.FieldMask update_mask = 4;</code>
+     */
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.protobuf.FieldMask,
+            com.google.protobuf.FieldMask.Builder,
+            com.google.protobuf.FieldMaskOrBuilder>
+        getUpdateMaskFieldBuilder() {
+      if (updateMaskBuilder_ == null) {
+        updateMaskBuilder_ =
+            new com.google.protobuf.SingleFieldBuilderV3<
+                com.google.protobuf.FieldMask,
+                com.google.protobuf.FieldMask.Builder,
+                com.google.protobuf.FieldMaskOrBuilder>(
+                getUpdateMask(), getParentForChildren(), isClean());
+        updateMask_ = null;
+      }
+      return updateMaskBuilder_;
+    }
+
+    @java.lang.Override
+    public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.setUnknownFields(unknownFields);
+    }
+
+    @java.lang.Override
+    public final Builder mergeUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.mergeUnknownFields(unknownFields);
+    }
+
+    // @@protoc_insertion_point(builder_scope:google.cloud.retail.v2.ImportProductsRequest)
+  }
+
+  // @@protoc_insertion_point(class_scope:google.cloud.retail.v2.ImportProductsRequest)
+  private static final com.google.cloud.retail.v2.ImportProductsRequest DEFAULT_INSTANCE;
+
+  static {
+    DEFAULT_INSTANCE = new com.google.cloud.retail.v2.ImportProductsRequest();
+  }
+
+  public static com.google.cloud.retail.v2.ImportProductsRequest getDefaultInstance() {
+    return DEFAULT_INSTANCE;
+  }
+
+  private static final com.google.protobuf.Parser<ImportProductsRequest> PARSER =
+      new com.google.protobuf.AbstractParser<ImportProductsRequest>() {
+        @java.lang.Override
+        public ImportProductsRequest parsePartialFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws com.google.protobuf.InvalidProtocolBufferException {
+          return new ImportProductsRequest(input, extensionRegistry);
+        }
+      };
+
+  public static com.google.protobuf.Parser<ImportProductsRequest> parser() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.protobuf.Parser<ImportProductsRequest> getParserForType() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.cloud.retail.v2.ImportProductsRequest getDefaultInstanceForType() {
+    return DEFAULT_INSTANCE;
+  }
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ImportProductsRequestOrBuilder.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ImportProductsRequestOrBuilder.java
new file mode 100644
index 00000000..774c1b9c
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ImportProductsRequestOrBuilder.java
@@ -0,0 +1,170 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/import_config.proto
+
+package com.google.cloud.retail.v2;
+
+public interface ImportProductsRequestOrBuilder
+    extends
+    // @@protoc_insertion_point(interface_extends:google.cloud.retail.v2.ImportProductsRequest)
+    com.google.protobuf.MessageOrBuilder {
+
+  /**
+   *
+   *
+   * <pre>
+   * Required.
+   * "projects/1234/locations/global/catalogs/default_catalog/branches/default_branch"
+   * If no updateMask is specified, requires products.create permission.
+   * If updateMask is specified, requires products.update permission.
+   * </pre>
+   *
+   * <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The parent.
+   */
+  java.lang.String getParent();
+  /**
+   *
+   *
+   * <pre>
+   * Required.
+   * "projects/1234/locations/global/catalogs/default_catalog/branches/default_branch"
+   * If no updateMask is specified, requires products.create permission.
+   * If updateMask is specified, requires products.update permission.
+   * </pre>
+   *
+   * <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The bytes for parent.
+   */
+  com.google.protobuf.ByteString getParentBytes();
+
+  /**
+   *
+   *
+   * <pre>
+   * Required. The desired input location of the data.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.retail.v2.ProductInputConfig input_config = 2 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   *
+   * @return Whether the inputConfig field is set.
+   */
+  boolean hasInputConfig();
+  /**
+   *
+   *
+   * <pre>
+   * Required. The desired input location of the data.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.retail.v2.ProductInputConfig input_config = 2 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   *
+   * @return The inputConfig.
+   */
+  com.google.cloud.retail.v2.ProductInputConfig getInputConfig();
+  /**
+   *
+   *
+   * <pre>
+   * Required. The desired input location of the data.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.retail.v2.ProductInputConfig input_config = 2 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   */
+  com.google.cloud.retail.v2.ProductInputConfigOrBuilder getInputConfigOrBuilder();
+
+  /**
+   *
+   *
+   * <pre>
+   * The desired location of errors incurred during the Import.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.ImportErrorsConfig errors_config = 3;</code>
+   *
+   * @return Whether the errorsConfig field is set.
+   */
+  boolean hasErrorsConfig();
+  /**
+   *
+   *
+   * <pre>
+   * The desired location of errors incurred during the Import.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.ImportErrorsConfig errors_config = 3;</code>
+   *
+   * @return The errorsConfig.
+   */
+  com.google.cloud.retail.v2.ImportErrorsConfig getErrorsConfig();
+  /**
+   *
+   *
+   * <pre>
+   * The desired location of errors incurred during the Import.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.ImportErrorsConfig errors_config = 3;</code>
+   */
+  com.google.cloud.retail.v2.ImportErrorsConfigOrBuilder getErrorsConfigOrBuilder();
+
+  /**
+   *
+   *
+   * <pre>
+   * Indicates which fields in the provided imported 'products' to update. If
+   * not set, will by default update all fields.
+   * </pre>
+   *
+   * <code>.google.protobuf.FieldMask update_mask = 4;</code>
+   *
+   * @return Whether the updateMask field is set.
+   */
+  boolean hasUpdateMask();
+  /**
+   *
+   *
+   * <pre>
+   * Indicates which fields in the provided imported 'products' to update. If
+   * not set, will by default update all fields.
+   * </pre>
+   *
+   * <code>.google.protobuf.FieldMask update_mask = 4;</code>
+   *
+   * @return The updateMask.
+   */
+  com.google.protobuf.FieldMask getUpdateMask();
+  /**
+   *
+   *
+   * <pre>
+   * Indicates which fields in the provided imported 'products' to update. If
+   * not set, will by default update all fields.
+   * </pre>
+   *
+   * <code>.google.protobuf.FieldMask update_mask = 4;</code>
+   */
+  com.google.protobuf.FieldMaskOrBuilder getUpdateMaskOrBuilder();
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ImportProductsResponse.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ImportProductsResponse.java
new file mode 100644
index 00000000..cfdde220
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ImportProductsResponse.java
@@ -0,0 +1,1220 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/import_config.proto
+
+package com.google.cloud.retail.v2;
+
+/**
+ *
+ *
+ * <pre>
+ * Response of the
+ * [ImportProductsRequest][google.cloud.retail.v2.ImportProductsRequest]. If the
+ * long running operation is done, then this message is returned by the
+ * google.longrunning.Operations.response field if the operation was successful.
+ * </pre>
+ *
+ * Protobuf type {@code google.cloud.retail.v2.ImportProductsResponse}
+ */
+public final class ImportProductsResponse extends com.google.protobuf.GeneratedMessageV3
+    implements
+    // @@protoc_insertion_point(message_implements:google.cloud.retail.v2.ImportProductsResponse)
+    ImportProductsResponseOrBuilder {
+  private static final long serialVersionUID = 0L;
+  // Use ImportProductsResponse.newBuilder() to construct.
+  private ImportProductsResponse(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+    super(builder);
+  }
+
+  private ImportProductsResponse() {
+    errorSamples_ = java.util.Collections.emptyList();
+  }
+
+  @java.lang.Override
+  @SuppressWarnings({"unused"})
+  protected java.lang.Object newInstance(UnusedPrivateParameter unused) {
+    return new ImportProductsResponse();
+  }
+
+  @java.lang.Override
+  public final com.google.protobuf.UnknownFieldSet getUnknownFields() {
+    return this.unknownFields;
+  }
+
+  private ImportProductsResponse(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    this();
+    if (extensionRegistry == null) {
+      throw new java.lang.NullPointerException();
+    }
+    int mutable_bitField0_ = 0;
+    com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+        com.google.protobuf.UnknownFieldSet.newBuilder();
+    try {
+      boolean done = false;
+      while (!done) {
+        int tag = input.readTag();
+        switch (tag) {
+          case 0:
+            done = true;
+            break;
+          case 10:
+            {
+              if (!((mutable_bitField0_ & 0x00000001) != 0)) {
+                errorSamples_ = new java.util.ArrayList<com.google.rpc.Status>();
+                mutable_bitField0_ |= 0x00000001;
+              }
+              errorSamples_.add(
+                  input.readMessage(com.google.rpc.Status.parser(), extensionRegistry));
+              break;
+            }
+          case 18:
+            {
+              com.google.cloud.retail.v2.ImportErrorsConfig.Builder subBuilder = null;
+              if (errorsConfig_ != null) {
+                subBuilder = errorsConfig_.toBuilder();
+              }
+              errorsConfig_ =
+                  input.readMessage(
+                      com.google.cloud.retail.v2.ImportErrorsConfig.parser(), extensionRegistry);
+              if (subBuilder != null) {
+                subBuilder.mergeFrom(errorsConfig_);
+                errorsConfig_ = subBuilder.buildPartial();
+              }
+
+              break;
+            }
+          default:
+            {
+              if (!parseUnknownField(input, unknownFields, extensionRegistry, tag)) {
+                done = true;
+              }
+              break;
+            }
+        }
+      }
+    } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+      throw e.setUnfinishedMessage(this);
+    } catch (java.io.IOException e) {
+      throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
+    } finally {
+      if (((mutable_bitField0_ & 0x00000001) != 0)) {
+        errorSamples_ = java.util.Collections.unmodifiableList(errorSamples_);
+      }
+      this.unknownFields = unknownFields.build();
+      makeExtensionsImmutable();
+    }
+  }
+
+  public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+    return com.google.cloud.retail.v2.ImportConfigProto
+        .internal_static_google_cloud_retail_v2_ImportProductsResponse_descriptor;
+  }
+
+  @java.lang.Override
+  protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internalGetFieldAccessorTable() {
+    return com.google.cloud.retail.v2.ImportConfigProto
+        .internal_static_google_cloud_retail_v2_ImportProductsResponse_fieldAccessorTable
+        .ensureFieldAccessorsInitialized(
+            com.google.cloud.retail.v2.ImportProductsResponse.class,
+            com.google.cloud.retail.v2.ImportProductsResponse.Builder.class);
+  }
+
+  public static final int ERROR_SAMPLES_FIELD_NUMBER = 1;
+  private java.util.List<com.google.rpc.Status> errorSamples_;
+  /**
+   *
+   *
+   * <pre>
+   * A sample of errors encountered while processing the request.
+   * </pre>
+   *
+   * <code>repeated .google.rpc.Status error_samples = 1;</code>
+   */
+  @java.lang.Override
+  public java.util.List<com.google.rpc.Status> getErrorSamplesList() {
+    return errorSamples_;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * A sample of errors encountered while processing the request.
+   * </pre>
+   *
+   * <code>repeated .google.rpc.Status error_samples = 1;</code>
+   */
+  @java.lang.Override
+  public java.util.List<? extends com.google.rpc.StatusOrBuilder> getErrorSamplesOrBuilderList() {
+    return errorSamples_;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * A sample of errors encountered while processing the request.
+   * </pre>
+   *
+   * <code>repeated .google.rpc.Status error_samples = 1;</code>
+   */
+  @java.lang.Override
+  public int getErrorSamplesCount() {
+    return errorSamples_.size();
+  }
+  /**
+   *
+   *
+   * <pre>
+   * A sample of errors encountered while processing the request.
+   * </pre>
+   *
+   * <code>repeated .google.rpc.Status error_samples = 1;</code>
+   */
+  @java.lang.Override
+  public com.google.rpc.Status getErrorSamples(int index) {
+    return errorSamples_.get(index);
+  }
+  /**
+   *
+   *
+   * <pre>
+   * A sample of errors encountered while processing the request.
+   * </pre>
+   *
+   * <code>repeated .google.rpc.Status error_samples = 1;</code>
+   */
+  @java.lang.Override
+  public com.google.rpc.StatusOrBuilder getErrorSamplesOrBuilder(int index) {
+    return errorSamples_.get(index);
+  }
+
+  public static final int ERRORS_CONFIG_FIELD_NUMBER = 2;
+  private com.google.cloud.retail.v2.ImportErrorsConfig errorsConfig_;
+  /**
+   *
+   *
+   * <pre>
+   * Echoes the destination for the complete errors in the request if set.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.ImportErrorsConfig errors_config = 2;</code>
+   *
+   * @return Whether the errorsConfig field is set.
+   */
+  @java.lang.Override
+  public boolean hasErrorsConfig() {
+    return errorsConfig_ != null;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Echoes the destination for the complete errors in the request if set.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.ImportErrorsConfig errors_config = 2;</code>
+   *
+   * @return The errorsConfig.
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.ImportErrorsConfig getErrorsConfig() {
+    return errorsConfig_ == null
+        ? com.google.cloud.retail.v2.ImportErrorsConfig.getDefaultInstance()
+        : errorsConfig_;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Echoes the destination for the complete errors in the request if set.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.ImportErrorsConfig errors_config = 2;</code>
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.ImportErrorsConfigOrBuilder getErrorsConfigOrBuilder() {
+    return getErrorsConfig();
+  }
+
+  private byte memoizedIsInitialized = -1;
+
+  @java.lang.Override
+  public final boolean isInitialized() {
+    byte isInitialized = memoizedIsInitialized;
+    if (isInitialized == 1) return true;
+    if (isInitialized == 0) return false;
+
+    memoizedIsInitialized = 1;
+    return true;
+  }
+
+  @java.lang.Override
+  public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
+    for (int i = 0; i < errorSamples_.size(); i++) {
+      output.writeMessage(1, errorSamples_.get(i));
+    }
+    if (errorsConfig_ != null) {
+      output.writeMessage(2, getErrorsConfig());
+    }
+    unknownFields.writeTo(output);
+  }
+
+  @java.lang.Override
+  public int getSerializedSize() {
+    int size = memoizedSize;
+    if (size != -1) return size;
+
+    size = 0;
+    for (int i = 0; i < errorSamples_.size(); i++) {
+      size += com.google.protobuf.CodedOutputStream.computeMessageSize(1, errorSamples_.get(i));
+    }
+    if (errorsConfig_ != null) {
+      size += com.google.protobuf.CodedOutputStream.computeMessageSize(2, getErrorsConfig());
+    }
+    size += unknownFields.getSerializedSize();
+    memoizedSize = size;
+    return size;
+  }
+
+  @java.lang.Override
+  public boolean equals(final java.lang.Object obj) {
+    if (obj == this) {
+      return true;
+    }
+    if (!(obj instanceof com.google.cloud.retail.v2.ImportProductsResponse)) {
+      return super.equals(obj);
+    }
+    com.google.cloud.retail.v2.ImportProductsResponse other =
+        (com.google.cloud.retail.v2.ImportProductsResponse) obj;
+
+    if (!getErrorSamplesList().equals(other.getErrorSamplesList())) return false;
+    if (hasErrorsConfig() != other.hasErrorsConfig()) return false;
+    if (hasErrorsConfig()) {
+      if (!getErrorsConfig().equals(other.getErrorsConfig())) return false;
+    }
+    if (!unknownFields.equals(other.unknownFields)) return false;
+    return true;
+  }
+
+  @java.lang.Override
+  public int hashCode() {
+    if (memoizedHashCode != 0) {
+      return memoizedHashCode;
+    }
+    int hash = 41;
+    hash = (19 * hash) + getDescriptor().hashCode();
+    if (getErrorSamplesCount() > 0) {
+      hash = (37 * hash) + ERROR_SAMPLES_FIELD_NUMBER;
+      hash = (53 * hash) + getErrorSamplesList().hashCode();
+    }
+    if (hasErrorsConfig()) {
+      hash = (37 * hash) + ERRORS_CONFIG_FIELD_NUMBER;
+      hash = (53 * hash) + getErrorsConfig().hashCode();
+    }
+    hash = (29 * hash) + unknownFields.hashCode();
+    memoizedHashCode = hash;
+    return hash;
+  }
+
+  public static com.google.cloud.retail.v2.ImportProductsResponse parseFrom(
+      java.nio.ByteBuffer data) throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.ImportProductsResponse parseFrom(
+      java.nio.ByteBuffer data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.ImportProductsResponse parseFrom(
+      com.google.protobuf.ByteString data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.ImportProductsResponse parseFrom(
+      com.google.protobuf.ByteString data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.ImportProductsResponse parseFrom(byte[] data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.ImportProductsResponse parseFrom(
+      byte[] data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.ImportProductsResponse parseFrom(
+      java.io.InputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.ImportProductsResponse parseFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.ImportProductsResponse parseDelimitedFrom(
+      java.io.InputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.ImportProductsResponse parseDelimitedFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.ImportProductsResponse parseFrom(
+      com.google.protobuf.CodedInputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.ImportProductsResponse parseFrom(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  @java.lang.Override
+  public Builder newBuilderForType() {
+    return newBuilder();
+  }
+
+  public static Builder newBuilder() {
+    return DEFAULT_INSTANCE.toBuilder();
+  }
+
+  public static Builder newBuilder(com.google.cloud.retail.v2.ImportProductsResponse prototype) {
+    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+  }
+
+  @java.lang.Override
+  public Builder toBuilder() {
+    return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
+  }
+
+  @java.lang.Override
+  protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+    Builder builder = new Builder(parent);
+    return builder;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Response of the
+   * [ImportProductsRequest][google.cloud.retail.v2.ImportProductsRequest]. If the
+   * long running operation is done, then this message is returned by the
+   * google.longrunning.Operations.response field if the operation was successful.
+   * </pre>
+   *
+   * Protobuf type {@code google.cloud.retail.v2.ImportProductsResponse}
+   */
+  public static final class Builder extends com.google.protobuf.GeneratedMessageV3.Builder<Builder>
+      implements
+      // @@protoc_insertion_point(builder_implements:google.cloud.retail.v2.ImportProductsResponse)
+      com.google.cloud.retail.v2.ImportProductsResponseOrBuilder {
+    public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+      return com.google.cloud.retail.v2.ImportConfigProto
+          .internal_static_google_cloud_retail_v2_ImportProductsResponse_descriptor;
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return com.google.cloud.retail.v2.ImportConfigProto
+          .internal_static_google_cloud_retail_v2_ImportProductsResponse_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              com.google.cloud.retail.v2.ImportProductsResponse.class,
+              com.google.cloud.retail.v2.ImportProductsResponse.Builder.class);
+    }
+
+    // Construct using com.google.cloud.retail.v2.ImportProductsResponse.newBuilder()
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
+
+    private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+      super(parent);
+      maybeForceBuilderInitialization();
+    }
+
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders) {
+        getErrorSamplesFieldBuilder();
+      }
+    }
+
+    @java.lang.Override
+    public Builder clear() {
+      super.clear();
+      if (errorSamplesBuilder_ == null) {
+        errorSamples_ = java.util.Collections.emptyList();
+        bitField0_ = (bitField0_ & ~0x00000001);
+      } else {
+        errorSamplesBuilder_.clear();
+      }
+      if (errorsConfigBuilder_ == null) {
+        errorsConfig_ = null;
+      } else {
+        errorsConfig_ = null;
+        errorsConfigBuilder_ = null;
+      }
+      return this;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
+      return com.google.cloud.retail.v2.ImportConfigProto
+          .internal_static_google_cloud_retail_v2_ImportProductsResponse_descriptor;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.ImportProductsResponse getDefaultInstanceForType() {
+      return com.google.cloud.retail.v2.ImportProductsResponse.getDefaultInstance();
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.ImportProductsResponse build() {
+      com.google.cloud.retail.v2.ImportProductsResponse result = buildPartial();
+      if (!result.isInitialized()) {
+        throw newUninitializedMessageException(result);
+      }
+      return result;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.ImportProductsResponse buildPartial() {
+      com.google.cloud.retail.v2.ImportProductsResponse result =
+          new com.google.cloud.retail.v2.ImportProductsResponse(this);
+      int from_bitField0_ = bitField0_;
+      if (errorSamplesBuilder_ == null) {
+        if (((bitField0_ & 0x00000001) != 0)) {
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+      }
+      if (errorsConfigBuilder_ == null) {
+        result.errorsConfig_ = errorsConfig_;
+      } else {
+        result.errorsConfig_ = errorsConfigBuilder_.build();
+      }
+      onBuilt();
+      return result;
+    }
+
+    @java.lang.Override
+    public Builder clone() {
+      return super.clone();
+    }
+
+    @java.lang.Override
+    public Builder setField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.setField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
+      return super.clearField(field);
+    }
+
+    @java.lang.Override
+    public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+      return super.clearOneof(oneof);
+    }
+
+    @java.lang.Override
+    public Builder setRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, int index, java.lang.Object value) {
+      return super.setRepeatedField(field, index, value);
+    }
+
+    @java.lang.Override
+    public Builder addRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.addRepeatedField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(com.google.protobuf.Message other) {
+      if (other instanceof com.google.cloud.retail.v2.ImportProductsResponse) {
+        return mergeFrom((com.google.cloud.retail.v2.ImportProductsResponse) other);
+      } else {
+        super.mergeFrom(other);
+        return this;
+      }
+    }
+
+    public Builder mergeFrom(com.google.cloud.retail.v2.ImportProductsResponse other) {
+      if (other == com.google.cloud.retail.v2.ImportProductsResponse.getDefaultInstance())
+        return this;
+      if (errorSamplesBuilder_ == null) {
+        if (!other.errorSamples_.isEmpty()) {
+          if (errorSamples_.isEmpty()) {
+            errorSamples_ = other.errorSamples_;
+            bitField0_ = (bitField0_ & ~0x00000001);
+          } else {
+            ensureErrorSamplesIsMutable();
+            errorSamples_.addAll(other.errorSamples_);
+          }
+          onChanged();
+        }
+      } else {
+        if (!other.errorSamples_.isEmpty()) {
+          if (errorSamplesBuilder_.isEmpty()) {
+            errorSamplesBuilder_.dispose();
+            errorSamplesBuilder_ = null;
+            errorSamples_ = other.errorSamples_;
+            bitField0_ = (bitField0_ & ~0x00000001);
+            errorSamplesBuilder_ =
+                com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders
+                    ? getErrorSamplesFieldBuilder()
+                    : null;
+          } else {
+            errorSamplesBuilder_.addAllMessages(other.errorSamples_);
+          }
+        }
+      }
+      if (other.hasErrorsConfig()) {
+        mergeErrorsConfig(other.getErrorsConfig());
+      }
+      this.mergeUnknownFields(other.unknownFields);
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final boolean isInitialized() {
+      return true;
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      com.google.cloud.retail.v2.ImportProductsResponse parsedMessage = null;
+      try {
+        parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        parsedMessage =
+            (com.google.cloud.retail.v2.ImportProductsResponse) e.getUnfinishedMessage();
+        throw e.unwrapIOException();
+      } finally {
+        if (parsedMessage != null) {
+          mergeFrom(parsedMessage);
+        }
+      }
+      return this;
+    }
+
+    private int bitField0_;
+
+    private java.util.List<com.google.rpc.Status> errorSamples_ = java.util.Collections.emptyList();
+
+    private void ensureErrorSamplesIsMutable() {
+      if (!((bitField0_ & 0x00000001) != 0)) {
+        errorSamples_ = new java.util.ArrayList<com.google.rpc.Status>(errorSamples_);
+        bitField0_ |= 0x00000001;
+      }
+    }
+
+    private com.google.protobuf.RepeatedFieldBuilderV3<
+            com.google.rpc.Status, com.google.rpc.Status.Builder, com.google.rpc.StatusOrBuilder>
+        errorSamplesBuilder_;
+
+    /**
+     *
+     *
+     * <pre>
+     * A sample of errors encountered while processing the request.
+     * </pre>
+     *
+     * <code>repeated .google.rpc.Status error_samples = 1;</code>
+     */
+    public java.util.List<com.google.rpc.Status> getErrorSamplesList() {
+      if (errorSamplesBuilder_ == null) {
+        return java.util.Collections.unmodifiableList(errorSamples_);
+      } else {
+        return errorSamplesBuilder_.getMessageList();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A sample of errors encountered while processing the request.
+     * </pre>
+     *
+     * <code>repeated .google.rpc.Status error_samples = 1;</code>
+     */
+    public int getErrorSamplesCount() {
+      if (errorSamplesBuilder_ == null) {
+        return errorSamples_.size();
+      } else {
+        return errorSamplesBuilder_.getCount();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A sample of errors encountered while processing the request.
+     * </pre>
+     *
+     * <code>repeated .google.rpc.Status error_samples = 1;</code>
+     */
+    public com.google.rpc.Status getErrorSamples(int index) {
+      if (errorSamplesBuilder_ == null) {
+        return errorSamples_.get(index);
+      } else {
+        return errorSamplesBuilder_.getMessage(index);
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A sample of errors encountered while processing the request.
+     * </pre>
+     *
+     * <code>repeated .google.rpc.Status error_samples = 1;</code>
+     */
+    public Builder setErrorSamples(int index, com.google.rpc.Status value) {
+      if (errorSamplesBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        ensureErrorSamplesIsMutable();
+        errorSamples_.set(index, value);
+        onChanged();
+      } else {
+        errorSamplesBuilder_.setMessage(index, value);
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A sample of errors encountered while processing the request.
+     * </pre>
+     *
+     * <code>repeated .google.rpc.Status error_samples = 1;</code>
+     */
+    public Builder setErrorSamples(int index, com.google.rpc.Status.Builder builderForValue) {
+      if (errorSamplesBuilder_ == null) {
+        ensureErrorSamplesIsMutable();
+        errorSamples_.set(index, builderForValue.build());
+        onChanged();
+      } else {
+        errorSamplesBuilder_.setMessage(index, builderForValue.build());
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A sample of errors encountered while processing the request.
+     * </pre>
+     *
+     * <code>repeated .google.rpc.Status error_samples = 1;</code>
+     */
+    public Builder addErrorSamples(com.google.rpc.Status value) {
+      if (errorSamplesBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        ensureErrorSamplesIsMutable();
+        errorSamples_.add(value);
+        onChanged();
+      } else {
+        errorSamplesBuilder_.addMessage(value);
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A sample of errors encountered while processing the request.
+     * </pre>
+     *
+     * <code>repeated .google.rpc.Status error_samples = 1;</code>
+     */
+    public Builder addErrorSamples(int index, com.google.rpc.Status value) {
+      if (errorSamplesBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        ensureErrorSamplesIsMutable();
+        errorSamples_.add(index, value);
+        onChanged();
+      } else {
+        errorSamplesBuilder_.addMessage(index, value);
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A sample of errors encountered while processing the request.
+     * </pre>
+     *
+     * <code>repeated .google.rpc.Status error_samples = 1;</code>
+     */
+    public Builder addErrorSamples(com.google.rpc.Status.Builder builderForValue) {
+      if (errorSamplesBuilder_ == null) {
+        ensureErrorSamplesIsMutable();
+        errorSamples_.add(builderForValue.build());
+        onChanged();
+      } else {
+        errorSamplesBuilder_.addMessage(builderForValue.build());
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A sample of errors encountered while processing the request.
+     * </pre>
+     *
+     * <code>repeated .google.rpc.Status error_samples = 1;</code>
+     */
+    public Builder addErrorSamples(int index, com.google.rpc.Status.Builder builderForValue) {
+      if (errorSamplesBuilder_ == null) {
+        ensureErrorSamplesIsMutable();
+        errorSamples_.add(index, builderForValue.build());
+        onChanged();
+      } else {
+        errorSamplesBuilder_.addMessage(index, builderForValue.build());
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A sample of errors encountered while processing the request.
+     * </pre>
+     *
+     * <code>repeated .google.rpc.Status error_samples = 1;</code>
+     */
+    public Builder addAllErrorSamples(java.lang.Iterable<? extends com.google.rpc.Status> values) {
+      if (errorSamplesBuilder_ == null) {
+        ensureErrorSamplesIsMutable();
+        com.google.protobuf.AbstractMessageLite.Builder.addAll(values, errorSamples_);
+        onChanged();
+      } else {
+        errorSamplesBuilder_.addAllMessages(values);
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A sample of errors encountered while processing the request.
+     * </pre>
+     *
+     * <code>repeated .google.rpc.Status error_samples = 1;</code>
+     */
+    public Builder clearErrorSamples() {
+      if (errorSamplesBuilder_ == null) {
+        errorSamples_ = java.util.Collections.emptyList();
+        bitField0_ = (bitField0_ & ~0x00000001);
+        onChanged();
+      } else {
+        errorSamplesBuilder_.clear();
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A sample of errors encountered while processing the request.
+     * </pre>
+     *
+     * <code>repeated .google.rpc.Status error_samples = 1;</code>
+     */
+    public Builder removeErrorSamples(int index) {
+      if (errorSamplesBuilder_ == null) {
+        ensureErrorSamplesIsMutable();
+        errorSamples_.remove(index);
+        onChanged();
+      } else {
+        errorSamplesBuilder_.remove(index);
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A sample of errors encountered while processing the request.
+     * </pre>
+     *
+     * <code>repeated .google.rpc.Status error_samples = 1;</code>
+     */
+    public com.google.rpc.Status.Builder getErrorSamplesBuilder(int index) {
+      return getErrorSamplesFieldBuilder().getBuilder(index);
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A sample of errors encountered while processing the request.
+     * </pre>
+     *
+     * <code>repeated .google.rpc.Status error_samples = 1;</code>
+     */
+    public com.google.rpc.StatusOrBuilder getErrorSamplesOrBuilder(int index) {
+      if (errorSamplesBuilder_ == null) {
+        return errorSamples_.get(index);
+      } else {
+        return errorSamplesBuilder_.getMessageOrBuilder(index);
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A sample of errors encountered while processing the request.
+     * </pre>
+     *
+     * <code>repeated .google.rpc.Status error_samples = 1;</code>
+     */
+    public java.util.List<? extends com.google.rpc.StatusOrBuilder> getErrorSamplesOrBuilderList() {
+      if (errorSamplesBuilder_ != null) {
+        return errorSamplesBuilder_.getMessageOrBuilderList();
+      } else {
+        return java.util.Collections.unmodifiableList(errorSamples_);
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A sample of errors encountered while processing the request.
+     * </pre>
+     *
+     * <code>repeated .google.rpc.Status error_samples = 1;</code>
+     */
+    public com.google.rpc.Status.Builder addErrorSamplesBuilder() {
+      return getErrorSamplesFieldBuilder().addBuilder(com.google.rpc.Status.getDefaultInstance());
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A sample of errors encountered while processing the request.
+     * </pre>
+     *
+     * <code>repeated .google.rpc.Status error_samples = 1;</code>
+     */
+    public com.google.rpc.Status.Builder addErrorSamplesBuilder(int index) {
+      return getErrorSamplesFieldBuilder()
+          .addBuilder(index, com.google.rpc.Status.getDefaultInstance());
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A sample of errors encountered while processing the request.
+     * </pre>
+     *
+     * <code>repeated .google.rpc.Status error_samples = 1;</code>
+     */
+    public java.util.List<com.google.rpc.Status.Builder> getErrorSamplesBuilderList() {
+      return getErrorSamplesFieldBuilder().getBuilderList();
+    }
+
+    private com.google.protobuf.RepeatedFieldBuilderV3<
+            com.google.rpc.Status, com.google.rpc.Status.Builder, com.google.rpc.StatusOrBuilder>
+        getErrorSamplesFieldBuilder() {
+      if (errorSamplesBuilder_ == null) {
+        errorSamplesBuilder_ =
+            new com.google.protobuf.RepeatedFieldBuilderV3<
+                com.google.rpc.Status,
+                com.google.rpc.Status.Builder,
+                com.google.rpc.StatusOrBuilder>(
+                errorSamples_, ((bitField0_ & 0x00000001) != 0), getParentForChildren(), isClean());
+        errorSamples_ = null;
+      }
+      return errorSamplesBuilder_;
+    }
+
+    private com.google.cloud.retail.v2.ImportErrorsConfig errorsConfig_;
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.cloud.retail.v2.ImportErrorsConfig,
+            com.google.cloud.retail.v2.ImportErrorsConfig.Builder,
+            com.google.cloud.retail.v2.ImportErrorsConfigOrBuilder>
+        errorsConfigBuilder_;
+    /**
+     *
+     *
+     * <pre>
+     * Echoes the destination for the complete errors in the request if set.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.ImportErrorsConfig errors_config = 2;</code>
+     *
+     * @return Whether the errorsConfig field is set.
+     */
+    public boolean hasErrorsConfig() {
+      return errorsConfigBuilder_ != null || errorsConfig_ != null;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Echoes the destination for the complete errors in the request if set.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.ImportErrorsConfig errors_config = 2;</code>
+     *
+     * @return The errorsConfig.
+     */
+    public com.google.cloud.retail.v2.ImportErrorsConfig getErrorsConfig() {
+      if (errorsConfigBuilder_ == null) {
+        return errorsConfig_ == null
+            ? com.google.cloud.retail.v2.ImportErrorsConfig.getDefaultInstance()
+            : errorsConfig_;
+      } else {
+        return errorsConfigBuilder_.getMessage();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Echoes the destination for the complete errors in the request if set.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.ImportErrorsConfig errors_config = 2;</code>
+     */
+    public Builder setErrorsConfig(com.google.cloud.retail.v2.ImportErrorsConfig value) {
+      if (errorsConfigBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        errorsConfig_ = value;
+        onChanged();
+      } else {
+        errorsConfigBuilder_.setMessage(value);
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Echoes the destination for the complete errors in the request if set.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.ImportErrorsConfig errors_config = 2;</code>
+     */
+    public Builder setErrorsConfig(
+        com.google.cloud.retail.v2.ImportErrorsConfig.Builder builderForValue) {
+      if (errorsConfigBuilder_ == null) {
+        errorsConfig_ = builderForValue.build();
+        onChanged();
+      } else {
+        errorsConfigBuilder_.setMessage(builderForValue.build());
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Echoes the destination for the complete errors in the request if set.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.ImportErrorsConfig errors_config = 2;</code>
+     */
+    public Builder mergeErrorsConfig(com.google.cloud.retail.v2.ImportErrorsConfig value) {
+      if (errorsConfigBuilder_ == null) {
+        if (errorsConfig_ != null) {
+          errorsConfig_ =
+              com.google.cloud.retail.v2.ImportErrorsConfig.newBuilder(errorsConfig_)
+                  .mergeFrom(value)
+                  .buildPartial();
+        } else {
+          errorsConfig_ = value;
+        }
+        onChanged();
+      } else {
+        errorsConfigBuilder_.mergeFrom(value);
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Echoes the destination for the complete errors in the request if set.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.ImportErrorsConfig errors_config = 2;</code>
+     */
+    public Builder clearErrorsConfig() {
+      if (errorsConfigBuilder_ == null) {
+        errorsConfig_ = null;
+        onChanged();
+      } else {
+        errorsConfig_ = null;
+        errorsConfigBuilder_ = null;
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Echoes the destination for the complete errors in the request if set.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.ImportErrorsConfig errors_config = 2;</code>
+     */
+    public com.google.cloud.retail.v2.ImportErrorsConfig.Builder getErrorsConfigBuilder() {
+
+      onChanged();
+      return getErrorsConfigFieldBuilder().getBuilder();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Echoes the destination for the complete errors in the request if set.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.ImportErrorsConfig errors_config = 2;</code>
+     */
+    public com.google.cloud.retail.v2.ImportErrorsConfigOrBuilder getErrorsConfigOrBuilder() {
+      if (errorsConfigBuilder_ != null) {
+        return errorsConfigBuilder_.getMessageOrBuilder();
+      } else {
+        return errorsConfig_ == null
+            ? com.google.cloud.retail.v2.ImportErrorsConfig.getDefaultInstance()
+            : errorsConfig_;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Echoes the destination for the complete errors in the request if set.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.ImportErrorsConfig errors_config = 2;</code>
+     */
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.cloud.retail.v2.ImportErrorsConfig,
+            com.google.cloud.retail.v2.ImportErrorsConfig.Builder,
+            com.google.cloud.retail.v2.ImportErrorsConfigOrBuilder>
+        getErrorsConfigFieldBuilder() {
+      if (errorsConfigBuilder_ == null) {
+        errorsConfigBuilder_ =
+            new com.google.protobuf.SingleFieldBuilderV3<
+                com.google.cloud.retail.v2.ImportErrorsConfig,
+                com.google.cloud.retail.v2.ImportErrorsConfig.Builder,
+                com.google.cloud.retail.v2.ImportErrorsConfigOrBuilder>(
+                getErrorsConfig(), getParentForChildren(), isClean());
+        errorsConfig_ = null;
+      }
+      return errorsConfigBuilder_;
+    }
+
+    @java.lang.Override
+    public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.setUnknownFields(unknownFields);
+    }
+
+    @java.lang.Override
+    public final Builder mergeUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.mergeUnknownFields(unknownFields);
+    }
+
+    // @@protoc_insertion_point(builder_scope:google.cloud.retail.v2.ImportProductsResponse)
+  }
+
+  // @@protoc_insertion_point(class_scope:google.cloud.retail.v2.ImportProductsResponse)
+  private static final com.google.cloud.retail.v2.ImportProductsResponse DEFAULT_INSTANCE;
+
+  static {
+    DEFAULT_INSTANCE = new com.google.cloud.retail.v2.ImportProductsResponse();
+  }
+
+  public static com.google.cloud.retail.v2.ImportProductsResponse getDefaultInstance() {
+    return DEFAULT_INSTANCE;
+  }
+
+  private static final com.google.protobuf.Parser<ImportProductsResponse> PARSER =
+      new com.google.protobuf.AbstractParser<ImportProductsResponse>() {
+        @java.lang.Override
+        public ImportProductsResponse parsePartialFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws com.google.protobuf.InvalidProtocolBufferException {
+          return new ImportProductsResponse(input, extensionRegistry);
+        }
+      };
+
+  public static com.google.protobuf.Parser<ImportProductsResponse> parser() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.protobuf.Parser<ImportProductsResponse> getParserForType() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.cloud.retail.v2.ImportProductsResponse getDefaultInstanceForType() {
+    return DEFAULT_INSTANCE;
+  }
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ImportProductsResponseOrBuilder.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ImportProductsResponseOrBuilder.java
new file mode 100644
index 00000000..9223f5d3
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ImportProductsResponseOrBuilder.java
@@ -0,0 +1,111 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/import_config.proto
+
+package com.google.cloud.retail.v2;
+
+public interface ImportProductsResponseOrBuilder
+    extends
+    // @@protoc_insertion_point(interface_extends:google.cloud.retail.v2.ImportProductsResponse)
+    com.google.protobuf.MessageOrBuilder {
+
+  /**
+   *
+   *
+   * <pre>
+   * A sample of errors encountered while processing the request.
+   * </pre>
+   *
+   * <code>repeated .google.rpc.Status error_samples = 1;</code>
+   */
+  java.util.List<com.google.rpc.Status> getErrorSamplesList();
+  /**
+   *
+   *
+   * <pre>
+   * A sample of errors encountered while processing the request.
+   * </pre>
+   *
+   * <code>repeated .google.rpc.Status error_samples = 1;</code>
+   */
+  com.google.rpc.Status getErrorSamples(int index);
+  /**
+   *
+   *
+   * <pre>
+   * A sample of errors encountered while processing the request.
+   * </pre>
+   *
+   * <code>repeated .google.rpc.Status error_samples = 1;</code>
+   */
+  int getErrorSamplesCount();
+  /**
+   *
+   *
+   * <pre>
+   * A sample of errors encountered while processing the request.
+   * </pre>
+   *
+   * <code>repeated .google.rpc.Status error_samples = 1;</code>
+   */
+  java.util.List<? extends com.google.rpc.StatusOrBuilder> getErrorSamplesOrBuilderList();
+  /**
+   *
+   *
+   * <pre>
+   * A sample of errors encountered while processing the request.
+   * </pre>
+   *
+   * <code>repeated .google.rpc.Status error_samples = 1;</code>
+   */
+  com.google.rpc.StatusOrBuilder getErrorSamplesOrBuilder(int index);
+
+  /**
+   *
+   *
+   * <pre>
+   * Echoes the destination for the complete errors in the request if set.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.ImportErrorsConfig errors_config = 2;</code>
+   *
+   * @return Whether the errorsConfig field is set.
+   */
+  boolean hasErrorsConfig();
+  /**
+   *
+   *
+   * <pre>
+   * Echoes the destination for the complete errors in the request if set.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.ImportErrorsConfig errors_config = 2;</code>
+   *
+   * @return The errorsConfig.
+   */
+  com.google.cloud.retail.v2.ImportErrorsConfig getErrorsConfig();
+  /**
+   *
+   *
+   * <pre>
+   * Echoes the destination for the complete errors in the request if set.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.ImportErrorsConfig errors_config = 2;</code>
+   */
+  com.google.cloud.retail.v2.ImportErrorsConfigOrBuilder getErrorsConfigOrBuilder();
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ImportUserEventsRequest.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ImportUserEventsRequest.java
new file mode 100644
index 00000000..e199bafd
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ImportUserEventsRequest.java
@@ -0,0 +1,1228 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/import_config.proto
+
+package com.google.cloud.retail.v2;
+
+/**
+ *
+ *
+ * <pre>
+ * Request message for the ImportUserEvents request.
+ * </pre>
+ *
+ * Protobuf type {@code google.cloud.retail.v2.ImportUserEventsRequest}
+ */
+public final class ImportUserEventsRequest extends com.google.protobuf.GeneratedMessageV3
+    implements
+    // @@protoc_insertion_point(message_implements:google.cloud.retail.v2.ImportUserEventsRequest)
+    ImportUserEventsRequestOrBuilder {
+  private static final long serialVersionUID = 0L;
+  // Use ImportUserEventsRequest.newBuilder() to construct.
+  private ImportUserEventsRequest(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+    super(builder);
+  }
+
+  private ImportUserEventsRequest() {
+    parent_ = "";
+  }
+
+  @java.lang.Override
+  @SuppressWarnings({"unused"})
+  protected java.lang.Object newInstance(UnusedPrivateParameter unused) {
+    return new ImportUserEventsRequest();
+  }
+
+  @java.lang.Override
+  public final com.google.protobuf.UnknownFieldSet getUnknownFields() {
+    return this.unknownFields;
+  }
+
+  private ImportUserEventsRequest(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    this();
+    if (extensionRegistry == null) {
+      throw new java.lang.NullPointerException();
+    }
+    com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+        com.google.protobuf.UnknownFieldSet.newBuilder();
+    try {
+      boolean done = false;
+      while (!done) {
+        int tag = input.readTag();
+        switch (tag) {
+          case 0:
+            done = true;
+            break;
+          case 10:
+            {
+              java.lang.String s = input.readStringRequireUtf8();
+
+              parent_ = s;
+              break;
+            }
+          case 18:
+            {
+              com.google.cloud.retail.v2.UserEventInputConfig.Builder subBuilder = null;
+              if (inputConfig_ != null) {
+                subBuilder = inputConfig_.toBuilder();
+              }
+              inputConfig_ =
+                  input.readMessage(
+                      com.google.cloud.retail.v2.UserEventInputConfig.parser(), extensionRegistry);
+              if (subBuilder != null) {
+                subBuilder.mergeFrom(inputConfig_);
+                inputConfig_ = subBuilder.buildPartial();
+              }
+
+              break;
+            }
+          case 26:
+            {
+              com.google.cloud.retail.v2.ImportErrorsConfig.Builder subBuilder = null;
+              if (errorsConfig_ != null) {
+                subBuilder = errorsConfig_.toBuilder();
+              }
+              errorsConfig_ =
+                  input.readMessage(
+                      com.google.cloud.retail.v2.ImportErrorsConfig.parser(), extensionRegistry);
+              if (subBuilder != null) {
+                subBuilder.mergeFrom(errorsConfig_);
+                errorsConfig_ = subBuilder.buildPartial();
+              }
+
+              break;
+            }
+          default:
+            {
+              if (!parseUnknownField(input, unknownFields, extensionRegistry, tag)) {
+                done = true;
+              }
+              break;
+            }
+        }
+      }
+    } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+      throw e.setUnfinishedMessage(this);
+    } catch (java.io.IOException e) {
+      throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
+    } finally {
+      this.unknownFields = unknownFields.build();
+      makeExtensionsImmutable();
+    }
+  }
+
+  public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+    return com.google.cloud.retail.v2.ImportConfigProto
+        .internal_static_google_cloud_retail_v2_ImportUserEventsRequest_descriptor;
+  }
+
+  @java.lang.Override
+  protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internalGetFieldAccessorTable() {
+    return com.google.cloud.retail.v2.ImportConfigProto
+        .internal_static_google_cloud_retail_v2_ImportUserEventsRequest_fieldAccessorTable
+        .ensureFieldAccessorsInitialized(
+            com.google.cloud.retail.v2.ImportUserEventsRequest.class,
+            com.google.cloud.retail.v2.ImportUserEventsRequest.Builder.class);
+  }
+
+  public static final int PARENT_FIELD_NUMBER = 1;
+  private volatile java.lang.Object parent_;
+  /**
+   *
+   *
+   * <pre>
+   * Required. "projects/1234/locations/global/catalogs/default_catalog"
+   * </pre>
+   *
+   * <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The parent.
+   */
+  @java.lang.Override
+  public java.lang.String getParent() {
+    java.lang.Object ref = parent_;
+    if (ref instanceof java.lang.String) {
+      return (java.lang.String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+      java.lang.String s = bs.toStringUtf8();
+      parent_ = s;
+      return s;
+    }
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Required. "projects/1234/locations/global/catalogs/default_catalog"
+   * </pre>
+   *
+   * <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The bytes for parent.
+   */
+  @java.lang.Override
+  public com.google.protobuf.ByteString getParentBytes() {
+    java.lang.Object ref = parent_;
+    if (ref instanceof java.lang.String) {
+      com.google.protobuf.ByteString b =
+          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+      parent_ = b;
+      return b;
+    } else {
+      return (com.google.protobuf.ByteString) ref;
+    }
+  }
+
+  public static final int INPUT_CONFIG_FIELD_NUMBER = 2;
+  private com.google.cloud.retail.v2.UserEventInputConfig inputConfig_;
+  /**
+   *
+   *
+   * <pre>
+   * Required. The desired input location of the data.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.retail.v2.UserEventInputConfig input_config = 2 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   *
+   * @return Whether the inputConfig field is set.
+   */
+  @java.lang.Override
+  public boolean hasInputConfig() {
+    return inputConfig_ != null;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Required. The desired input location of the data.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.retail.v2.UserEventInputConfig input_config = 2 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   *
+   * @return The inputConfig.
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.UserEventInputConfig getInputConfig() {
+    return inputConfig_ == null
+        ? com.google.cloud.retail.v2.UserEventInputConfig.getDefaultInstance()
+        : inputConfig_;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Required. The desired input location of the data.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.retail.v2.UserEventInputConfig input_config = 2 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.UserEventInputConfigOrBuilder getInputConfigOrBuilder() {
+    return getInputConfig();
+  }
+
+  public static final int ERRORS_CONFIG_FIELD_NUMBER = 3;
+  private com.google.cloud.retail.v2.ImportErrorsConfig errorsConfig_;
+  /**
+   *
+   *
+   * <pre>
+   * The desired location of errors incurred during the Import. Cannot be set
+   * for inline user event imports.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.ImportErrorsConfig errors_config = 3;</code>
+   *
+   * @return Whether the errorsConfig field is set.
+   */
+  @java.lang.Override
+  public boolean hasErrorsConfig() {
+    return errorsConfig_ != null;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * The desired location of errors incurred during the Import. Cannot be set
+   * for inline user event imports.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.ImportErrorsConfig errors_config = 3;</code>
+   *
+   * @return The errorsConfig.
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.ImportErrorsConfig getErrorsConfig() {
+    return errorsConfig_ == null
+        ? com.google.cloud.retail.v2.ImportErrorsConfig.getDefaultInstance()
+        : errorsConfig_;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * The desired location of errors incurred during the Import. Cannot be set
+   * for inline user event imports.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.ImportErrorsConfig errors_config = 3;</code>
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.ImportErrorsConfigOrBuilder getErrorsConfigOrBuilder() {
+    return getErrorsConfig();
+  }
+
+  private byte memoizedIsInitialized = -1;
+
+  @java.lang.Override
+  public final boolean isInitialized() {
+    byte isInitialized = memoizedIsInitialized;
+    if (isInitialized == 1) return true;
+    if (isInitialized == 0) return false;
+
+    memoizedIsInitialized = 1;
+    return true;
+  }
+
+  @java.lang.Override
+  public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
+    if (!getParentBytes().isEmpty()) {
+      com.google.protobuf.GeneratedMessageV3.writeString(output, 1, parent_);
+    }
+    if (inputConfig_ != null) {
+      output.writeMessage(2, getInputConfig());
+    }
+    if (errorsConfig_ != null) {
+      output.writeMessage(3, getErrorsConfig());
+    }
+    unknownFields.writeTo(output);
+  }
+
+  @java.lang.Override
+  public int getSerializedSize() {
+    int size = memoizedSize;
+    if (size != -1) return size;
+
+    size = 0;
+    if (!getParentBytes().isEmpty()) {
+      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(1, parent_);
+    }
+    if (inputConfig_ != null) {
+      size += com.google.protobuf.CodedOutputStream.computeMessageSize(2, getInputConfig());
+    }
+    if (errorsConfig_ != null) {
+      size += com.google.protobuf.CodedOutputStream.computeMessageSize(3, getErrorsConfig());
+    }
+    size += unknownFields.getSerializedSize();
+    memoizedSize = size;
+    return size;
+  }
+
+  @java.lang.Override
+  public boolean equals(final java.lang.Object obj) {
+    if (obj == this) {
+      return true;
+    }
+    if (!(obj instanceof com.google.cloud.retail.v2.ImportUserEventsRequest)) {
+      return super.equals(obj);
+    }
+    com.google.cloud.retail.v2.ImportUserEventsRequest other =
+        (com.google.cloud.retail.v2.ImportUserEventsRequest) obj;
+
+    if (!getParent().equals(other.getParent())) return false;
+    if (hasInputConfig() != other.hasInputConfig()) return false;
+    if (hasInputConfig()) {
+      if (!getInputConfig().equals(other.getInputConfig())) return false;
+    }
+    if (hasErrorsConfig() != other.hasErrorsConfig()) return false;
+    if (hasErrorsConfig()) {
+      if (!getErrorsConfig().equals(other.getErrorsConfig())) return false;
+    }
+    if (!unknownFields.equals(other.unknownFields)) return false;
+    return true;
+  }
+
+  @java.lang.Override
+  public int hashCode() {
+    if (memoizedHashCode != 0) {
+      return memoizedHashCode;
+    }
+    int hash = 41;
+    hash = (19 * hash) + getDescriptor().hashCode();
+    hash = (37 * hash) + PARENT_FIELD_NUMBER;
+    hash = (53 * hash) + getParent().hashCode();
+    if (hasInputConfig()) {
+      hash = (37 * hash) + INPUT_CONFIG_FIELD_NUMBER;
+      hash = (53 * hash) + getInputConfig().hashCode();
+    }
+    if (hasErrorsConfig()) {
+      hash = (37 * hash) + ERRORS_CONFIG_FIELD_NUMBER;
+      hash = (53 * hash) + getErrorsConfig().hashCode();
+    }
+    hash = (29 * hash) + unknownFields.hashCode();
+    memoizedHashCode = hash;
+    return hash;
+  }
+
+  public static com.google.cloud.retail.v2.ImportUserEventsRequest parseFrom(
+      java.nio.ByteBuffer data) throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.ImportUserEventsRequest parseFrom(
+      java.nio.ByteBuffer data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.ImportUserEventsRequest parseFrom(
+      com.google.protobuf.ByteString data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.ImportUserEventsRequest parseFrom(
+      com.google.protobuf.ByteString data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.ImportUserEventsRequest parseFrom(byte[] data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.ImportUserEventsRequest parseFrom(
+      byte[] data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.ImportUserEventsRequest parseFrom(
+      java.io.InputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.ImportUserEventsRequest parseFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.ImportUserEventsRequest parseDelimitedFrom(
+      java.io.InputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.ImportUserEventsRequest parseDelimitedFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.ImportUserEventsRequest parseFrom(
+      com.google.protobuf.CodedInputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.ImportUserEventsRequest parseFrom(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  @java.lang.Override
+  public Builder newBuilderForType() {
+    return newBuilder();
+  }
+
+  public static Builder newBuilder() {
+    return DEFAULT_INSTANCE.toBuilder();
+  }
+
+  public static Builder newBuilder(com.google.cloud.retail.v2.ImportUserEventsRequest prototype) {
+    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+  }
+
+  @java.lang.Override
+  public Builder toBuilder() {
+    return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
+  }
+
+  @java.lang.Override
+  protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+    Builder builder = new Builder(parent);
+    return builder;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Request message for the ImportUserEvents request.
+   * </pre>
+   *
+   * Protobuf type {@code google.cloud.retail.v2.ImportUserEventsRequest}
+   */
+  public static final class Builder extends com.google.protobuf.GeneratedMessageV3.Builder<Builder>
+      implements
+      // @@protoc_insertion_point(builder_implements:google.cloud.retail.v2.ImportUserEventsRequest)
+      com.google.cloud.retail.v2.ImportUserEventsRequestOrBuilder {
+    public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+      return com.google.cloud.retail.v2.ImportConfigProto
+          .internal_static_google_cloud_retail_v2_ImportUserEventsRequest_descriptor;
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return com.google.cloud.retail.v2.ImportConfigProto
+          .internal_static_google_cloud_retail_v2_ImportUserEventsRequest_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              com.google.cloud.retail.v2.ImportUserEventsRequest.class,
+              com.google.cloud.retail.v2.ImportUserEventsRequest.Builder.class);
+    }
+
+    // Construct using com.google.cloud.retail.v2.ImportUserEventsRequest.newBuilder()
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
+
+    private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+      super(parent);
+      maybeForceBuilderInitialization();
+    }
+
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders) {}
+    }
+
+    @java.lang.Override
+    public Builder clear() {
+      super.clear();
+      parent_ = "";
+
+      if (inputConfigBuilder_ == null) {
+        inputConfig_ = null;
+      } else {
+        inputConfig_ = null;
+        inputConfigBuilder_ = null;
+      }
+      if (errorsConfigBuilder_ == null) {
+        errorsConfig_ = null;
+      } else {
+        errorsConfig_ = null;
+        errorsConfigBuilder_ = null;
+      }
+      return this;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
+      return com.google.cloud.retail.v2.ImportConfigProto
+          .internal_static_google_cloud_retail_v2_ImportUserEventsRequest_descriptor;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.ImportUserEventsRequest getDefaultInstanceForType() {
+      return com.google.cloud.retail.v2.ImportUserEventsRequest.getDefaultInstance();
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.ImportUserEventsRequest build() {
+      com.google.cloud.retail.v2.ImportUserEventsRequest result = buildPartial();
+      if (!result.isInitialized()) {
+        throw newUninitializedMessageException(result);
+      }
+      return result;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.ImportUserEventsRequest buildPartial() {
+      com.google.cloud.retail.v2.ImportUserEventsRequest result =
+          new com.google.cloud.retail.v2.ImportUserEventsRequest(this);
+      result.parent_ = parent_;
+      if (inputConfigBuilder_ == null) {
+        result.inputConfig_ = inputConfig_;
+      } else {
+        result.inputConfig_ = inputConfigBuilder_.build();
+      }
+      if (errorsConfigBuilder_ == null) {
+        result.errorsConfig_ = errorsConfig_;
+      } else {
+        result.errorsConfig_ = errorsConfigBuilder_.build();
+      }
+      onBuilt();
+      return result;
+    }
+
+    @java.lang.Override
+    public Builder clone() {
+      return super.clone();
+    }
+
+    @java.lang.Override
+    public Builder setField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.setField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
+      return super.clearField(field);
+    }
+
+    @java.lang.Override
+    public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+      return super.clearOneof(oneof);
+    }
+
+    @java.lang.Override
+    public Builder setRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, int index, java.lang.Object value) {
+      return super.setRepeatedField(field, index, value);
+    }
+
+    @java.lang.Override
+    public Builder addRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.addRepeatedField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(com.google.protobuf.Message other) {
+      if (other instanceof com.google.cloud.retail.v2.ImportUserEventsRequest) {
+        return mergeFrom((com.google.cloud.retail.v2.ImportUserEventsRequest) other);
+      } else {
+        super.mergeFrom(other);
+        return this;
+      }
+    }
+
+    public Builder mergeFrom(com.google.cloud.retail.v2.ImportUserEventsRequest other) {
+      if (other == com.google.cloud.retail.v2.ImportUserEventsRequest.getDefaultInstance())
+        return this;
+      if (!other.getParent().isEmpty()) {
+        parent_ = other.parent_;
+        onChanged();
+      }
+      if (other.hasInputConfig()) {
+        mergeInputConfig(other.getInputConfig());
+      }
+      if (other.hasErrorsConfig()) {
+        mergeErrorsConfig(other.getErrorsConfig());
+      }
+      this.mergeUnknownFields(other.unknownFields);
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final boolean isInitialized() {
+      return true;
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      com.google.cloud.retail.v2.ImportUserEventsRequest parsedMessage = null;
+      try {
+        parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        parsedMessage =
+            (com.google.cloud.retail.v2.ImportUserEventsRequest) e.getUnfinishedMessage();
+        throw e.unwrapIOException();
+      } finally {
+        if (parsedMessage != null) {
+          mergeFrom(parsedMessage);
+        }
+      }
+      return this;
+    }
+
+    private java.lang.Object parent_ = "";
+    /**
+     *
+     *
+     * <pre>
+     * Required. "projects/1234/locations/global/catalogs/default_catalog"
+     * </pre>
+     *
+     * <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @return The parent.
+     */
+    public java.lang.String getParent() {
+      java.lang.Object ref = parent_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        parent_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. "projects/1234/locations/global/catalogs/default_catalog"
+     * </pre>
+     *
+     * <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @return The bytes for parent.
+     */
+    public com.google.protobuf.ByteString getParentBytes() {
+      java.lang.Object ref = parent_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b =
+            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+        parent_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. "projects/1234/locations/global/catalogs/default_catalog"
+     * </pre>
+     *
+     * <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @param value The parent to set.
+     * @return This builder for chaining.
+     */
+    public Builder setParent(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+
+      parent_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. "projects/1234/locations/global/catalogs/default_catalog"
+     * </pre>
+     *
+     * <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearParent() {
+
+      parent_ = getDefaultInstance().getParent();
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. "projects/1234/locations/global/catalogs/default_catalog"
+     * </pre>
+     *
+     * <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @param value The bytes for parent to set.
+     * @return This builder for chaining.
+     */
+    public Builder setParentBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+
+      parent_ = value;
+      onChanged();
+      return this;
+    }
+
+    private com.google.cloud.retail.v2.UserEventInputConfig inputConfig_;
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.cloud.retail.v2.UserEventInputConfig,
+            com.google.cloud.retail.v2.UserEventInputConfig.Builder,
+            com.google.cloud.retail.v2.UserEventInputConfigOrBuilder>
+        inputConfigBuilder_;
+    /**
+     *
+     *
+     * <pre>
+     * Required. The desired input location of the data.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.UserEventInputConfig input_config = 2 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     *
+     * @return Whether the inputConfig field is set.
+     */
+    public boolean hasInputConfig() {
+      return inputConfigBuilder_ != null || inputConfig_ != null;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The desired input location of the data.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.UserEventInputConfig input_config = 2 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     *
+     * @return The inputConfig.
+     */
+    public com.google.cloud.retail.v2.UserEventInputConfig getInputConfig() {
+      if (inputConfigBuilder_ == null) {
+        return inputConfig_ == null
+            ? com.google.cloud.retail.v2.UserEventInputConfig.getDefaultInstance()
+            : inputConfig_;
+      } else {
+        return inputConfigBuilder_.getMessage();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The desired input location of the data.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.UserEventInputConfig input_config = 2 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder setInputConfig(com.google.cloud.retail.v2.UserEventInputConfig value) {
+      if (inputConfigBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        inputConfig_ = value;
+        onChanged();
+      } else {
+        inputConfigBuilder_.setMessage(value);
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The desired input location of the data.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.UserEventInputConfig input_config = 2 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder setInputConfig(
+        com.google.cloud.retail.v2.UserEventInputConfig.Builder builderForValue) {
+      if (inputConfigBuilder_ == null) {
+        inputConfig_ = builderForValue.build();
+        onChanged();
+      } else {
+        inputConfigBuilder_.setMessage(builderForValue.build());
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The desired input location of the data.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.UserEventInputConfig input_config = 2 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder mergeInputConfig(com.google.cloud.retail.v2.UserEventInputConfig value) {
+      if (inputConfigBuilder_ == null) {
+        if (inputConfig_ != null) {
+          inputConfig_ =
+              com.google.cloud.retail.v2.UserEventInputConfig.newBuilder(inputConfig_)
+                  .mergeFrom(value)
+                  .buildPartial();
+        } else {
+          inputConfig_ = value;
+        }
+        onChanged();
+      } else {
+        inputConfigBuilder_.mergeFrom(value);
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The desired input location of the data.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.UserEventInputConfig input_config = 2 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder clearInputConfig() {
+      if (inputConfigBuilder_ == null) {
+        inputConfig_ = null;
+        onChanged();
+      } else {
+        inputConfig_ = null;
+        inputConfigBuilder_ = null;
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The desired input location of the data.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.UserEventInputConfig input_config = 2 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public com.google.cloud.retail.v2.UserEventInputConfig.Builder getInputConfigBuilder() {
+
+      onChanged();
+      return getInputConfigFieldBuilder().getBuilder();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The desired input location of the data.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.UserEventInputConfig input_config = 2 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public com.google.cloud.retail.v2.UserEventInputConfigOrBuilder getInputConfigOrBuilder() {
+      if (inputConfigBuilder_ != null) {
+        return inputConfigBuilder_.getMessageOrBuilder();
+      } else {
+        return inputConfig_ == null
+            ? com.google.cloud.retail.v2.UserEventInputConfig.getDefaultInstance()
+            : inputConfig_;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The desired input location of the data.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.UserEventInputConfig input_config = 2 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.cloud.retail.v2.UserEventInputConfig,
+            com.google.cloud.retail.v2.UserEventInputConfig.Builder,
+            com.google.cloud.retail.v2.UserEventInputConfigOrBuilder>
+        getInputConfigFieldBuilder() {
+      if (inputConfigBuilder_ == null) {
+        inputConfigBuilder_ =
+            new com.google.protobuf.SingleFieldBuilderV3<
+                com.google.cloud.retail.v2.UserEventInputConfig,
+                com.google.cloud.retail.v2.UserEventInputConfig.Builder,
+                com.google.cloud.retail.v2.UserEventInputConfigOrBuilder>(
+                getInputConfig(), getParentForChildren(), isClean());
+        inputConfig_ = null;
+      }
+      return inputConfigBuilder_;
+    }
+
+    private com.google.cloud.retail.v2.ImportErrorsConfig errorsConfig_;
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.cloud.retail.v2.ImportErrorsConfig,
+            com.google.cloud.retail.v2.ImportErrorsConfig.Builder,
+            com.google.cloud.retail.v2.ImportErrorsConfigOrBuilder>
+        errorsConfigBuilder_;
+    /**
+     *
+     *
+     * <pre>
+     * The desired location of errors incurred during the Import. Cannot be set
+     * for inline user event imports.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.ImportErrorsConfig errors_config = 3;</code>
+     *
+     * @return Whether the errorsConfig field is set.
+     */
+    public boolean hasErrorsConfig() {
+      return errorsConfigBuilder_ != null || errorsConfig_ != null;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The desired location of errors incurred during the Import. Cannot be set
+     * for inline user event imports.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.ImportErrorsConfig errors_config = 3;</code>
+     *
+     * @return The errorsConfig.
+     */
+    public com.google.cloud.retail.v2.ImportErrorsConfig getErrorsConfig() {
+      if (errorsConfigBuilder_ == null) {
+        return errorsConfig_ == null
+            ? com.google.cloud.retail.v2.ImportErrorsConfig.getDefaultInstance()
+            : errorsConfig_;
+      } else {
+        return errorsConfigBuilder_.getMessage();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The desired location of errors incurred during the Import. Cannot be set
+     * for inline user event imports.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.ImportErrorsConfig errors_config = 3;</code>
+     */
+    public Builder setErrorsConfig(com.google.cloud.retail.v2.ImportErrorsConfig value) {
+      if (errorsConfigBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        errorsConfig_ = value;
+        onChanged();
+      } else {
+        errorsConfigBuilder_.setMessage(value);
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The desired location of errors incurred during the Import. Cannot be set
+     * for inline user event imports.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.ImportErrorsConfig errors_config = 3;</code>
+     */
+    public Builder setErrorsConfig(
+        com.google.cloud.retail.v2.ImportErrorsConfig.Builder builderForValue) {
+      if (errorsConfigBuilder_ == null) {
+        errorsConfig_ = builderForValue.build();
+        onChanged();
+      } else {
+        errorsConfigBuilder_.setMessage(builderForValue.build());
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The desired location of errors incurred during the Import. Cannot be set
+     * for inline user event imports.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.ImportErrorsConfig errors_config = 3;</code>
+     */
+    public Builder mergeErrorsConfig(com.google.cloud.retail.v2.ImportErrorsConfig value) {
+      if (errorsConfigBuilder_ == null) {
+        if (errorsConfig_ != null) {
+          errorsConfig_ =
+              com.google.cloud.retail.v2.ImportErrorsConfig.newBuilder(errorsConfig_)
+                  .mergeFrom(value)
+                  .buildPartial();
+        } else {
+          errorsConfig_ = value;
+        }
+        onChanged();
+      } else {
+        errorsConfigBuilder_.mergeFrom(value);
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The desired location of errors incurred during the Import. Cannot be set
+     * for inline user event imports.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.ImportErrorsConfig errors_config = 3;</code>
+     */
+    public Builder clearErrorsConfig() {
+      if (errorsConfigBuilder_ == null) {
+        errorsConfig_ = null;
+        onChanged();
+      } else {
+        errorsConfig_ = null;
+        errorsConfigBuilder_ = null;
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The desired location of errors incurred during the Import. Cannot be set
+     * for inline user event imports.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.ImportErrorsConfig errors_config = 3;</code>
+     */
+    public com.google.cloud.retail.v2.ImportErrorsConfig.Builder getErrorsConfigBuilder() {
+
+      onChanged();
+      return getErrorsConfigFieldBuilder().getBuilder();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The desired location of errors incurred during the Import. Cannot be set
+     * for inline user event imports.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.ImportErrorsConfig errors_config = 3;</code>
+     */
+    public com.google.cloud.retail.v2.ImportErrorsConfigOrBuilder getErrorsConfigOrBuilder() {
+      if (errorsConfigBuilder_ != null) {
+        return errorsConfigBuilder_.getMessageOrBuilder();
+      } else {
+        return errorsConfig_ == null
+            ? com.google.cloud.retail.v2.ImportErrorsConfig.getDefaultInstance()
+            : errorsConfig_;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The desired location of errors incurred during the Import. Cannot be set
+     * for inline user event imports.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.ImportErrorsConfig errors_config = 3;</code>
+     */
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.cloud.retail.v2.ImportErrorsConfig,
+            com.google.cloud.retail.v2.ImportErrorsConfig.Builder,
+            com.google.cloud.retail.v2.ImportErrorsConfigOrBuilder>
+        getErrorsConfigFieldBuilder() {
+      if (errorsConfigBuilder_ == null) {
+        errorsConfigBuilder_ =
+            new com.google.protobuf.SingleFieldBuilderV3<
+                com.google.cloud.retail.v2.ImportErrorsConfig,
+                com.google.cloud.retail.v2.ImportErrorsConfig.Builder,
+                com.google.cloud.retail.v2.ImportErrorsConfigOrBuilder>(
+                getErrorsConfig(), getParentForChildren(), isClean());
+        errorsConfig_ = null;
+      }
+      return errorsConfigBuilder_;
+    }
+
+    @java.lang.Override
+    public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.setUnknownFields(unknownFields);
+    }
+
+    @java.lang.Override
+    public final Builder mergeUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.mergeUnknownFields(unknownFields);
+    }
+
+    // @@protoc_insertion_point(builder_scope:google.cloud.retail.v2.ImportUserEventsRequest)
+  }
+
+  // @@protoc_insertion_point(class_scope:google.cloud.retail.v2.ImportUserEventsRequest)
+  private static final com.google.cloud.retail.v2.ImportUserEventsRequest DEFAULT_INSTANCE;
+
+  static {
+    DEFAULT_INSTANCE = new com.google.cloud.retail.v2.ImportUserEventsRequest();
+  }
+
+  public static com.google.cloud.retail.v2.ImportUserEventsRequest getDefaultInstance() {
+    return DEFAULT_INSTANCE;
+  }
+
+  private static final com.google.protobuf.Parser<ImportUserEventsRequest> PARSER =
+      new com.google.protobuf.AbstractParser<ImportUserEventsRequest>() {
+        @java.lang.Override
+        public ImportUserEventsRequest parsePartialFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws com.google.protobuf.InvalidProtocolBufferException {
+          return new ImportUserEventsRequest(input, extensionRegistry);
+        }
+      };
+
+  public static com.google.protobuf.Parser<ImportUserEventsRequest> parser() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.protobuf.Parser<ImportUserEventsRequest> getParserForType() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.cloud.retail.v2.ImportUserEventsRequest getDefaultInstanceForType() {
+    return DEFAULT_INSTANCE;
+  }
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ImportUserEventsRequestOrBuilder.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ImportUserEventsRequestOrBuilder.java
new file mode 100644
index 00000000..d8917b71
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ImportUserEventsRequestOrBuilder.java
@@ -0,0 +1,129 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/import_config.proto
+
+package com.google.cloud.retail.v2;
+
+public interface ImportUserEventsRequestOrBuilder
+    extends
+    // @@protoc_insertion_point(interface_extends:google.cloud.retail.v2.ImportUserEventsRequest)
+    com.google.protobuf.MessageOrBuilder {
+
+  /**
+   *
+   *
+   * <pre>
+   * Required. "projects/1234/locations/global/catalogs/default_catalog"
+   * </pre>
+   *
+   * <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The parent.
+   */
+  java.lang.String getParent();
+  /**
+   *
+   *
+   * <pre>
+   * Required. "projects/1234/locations/global/catalogs/default_catalog"
+   * </pre>
+   *
+   * <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The bytes for parent.
+   */
+  com.google.protobuf.ByteString getParentBytes();
+
+  /**
+   *
+   *
+   * <pre>
+   * Required. The desired input location of the data.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.retail.v2.UserEventInputConfig input_config = 2 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   *
+   * @return Whether the inputConfig field is set.
+   */
+  boolean hasInputConfig();
+  /**
+   *
+   *
+   * <pre>
+   * Required. The desired input location of the data.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.retail.v2.UserEventInputConfig input_config = 2 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   *
+   * @return The inputConfig.
+   */
+  com.google.cloud.retail.v2.UserEventInputConfig getInputConfig();
+  /**
+   *
+   *
+   * <pre>
+   * Required. The desired input location of the data.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.retail.v2.UserEventInputConfig input_config = 2 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   */
+  com.google.cloud.retail.v2.UserEventInputConfigOrBuilder getInputConfigOrBuilder();
+
+  /**
+   *
+   *
+   * <pre>
+   * The desired location of errors incurred during the Import. Cannot be set
+   * for inline user event imports.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.ImportErrorsConfig errors_config = 3;</code>
+   *
+   * @return Whether the errorsConfig field is set.
+   */
+  boolean hasErrorsConfig();
+  /**
+   *
+   *
+   * <pre>
+   * The desired location of errors incurred during the Import. Cannot be set
+   * for inline user event imports.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.ImportErrorsConfig errors_config = 3;</code>
+   *
+   * @return The errorsConfig.
+   */
+  com.google.cloud.retail.v2.ImportErrorsConfig getErrorsConfig();
+  /**
+   *
+   *
+   * <pre>
+   * The desired location of errors incurred during the Import. Cannot be set
+   * for inline user event imports.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.ImportErrorsConfig errors_config = 3;</code>
+   */
+  com.google.cloud.retail.v2.ImportErrorsConfigOrBuilder getErrorsConfigOrBuilder();
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ImportUserEventsResponse.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ImportUserEventsResponse.java
new file mode 100644
index 00000000..034da0d1
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ImportUserEventsResponse.java
@@ -0,0 +1,1509 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/import_config.proto
+
+package com.google.cloud.retail.v2;
+
+/**
+ *
+ *
+ * <pre>
+ * Response of the ImportUserEventsRequest. If the long running
+ * operation was successful, then this message is returned by the
+ * google.longrunning.Operations.response field if the operation was successful.
+ * </pre>
+ *
+ * Protobuf type {@code google.cloud.retail.v2.ImportUserEventsResponse}
+ */
+public final class ImportUserEventsResponse extends com.google.protobuf.GeneratedMessageV3
+    implements
+    // @@protoc_insertion_point(message_implements:google.cloud.retail.v2.ImportUserEventsResponse)
+    ImportUserEventsResponseOrBuilder {
+  private static final long serialVersionUID = 0L;
+  // Use ImportUserEventsResponse.newBuilder() to construct.
+  private ImportUserEventsResponse(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+    super(builder);
+  }
+
+  private ImportUserEventsResponse() {
+    errorSamples_ = java.util.Collections.emptyList();
+  }
+
+  @java.lang.Override
+  @SuppressWarnings({"unused"})
+  protected java.lang.Object newInstance(UnusedPrivateParameter unused) {
+    return new ImportUserEventsResponse();
+  }
+
+  @java.lang.Override
+  public final com.google.protobuf.UnknownFieldSet getUnknownFields() {
+    return this.unknownFields;
+  }
+
+  private ImportUserEventsResponse(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    this();
+    if (extensionRegistry == null) {
+      throw new java.lang.NullPointerException();
+    }
+    int mutable_bitField0_ = 0;
+    com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+        com.google.protobuf.UnknownFieldSet.newBuilder();
+    try {
+      boolean done = false;
+      while (!done) {
+        int tag = input.readTag();
+        switch (tag) {
+          case 0:
+            done = true;
+            break;
+          case 10:
+            {
+              if (!((mutable_bitField0_ & 0x00000001) != 0)) {
+                errorSamples_ = new java.util.ArrayList<com.google.rpc.Status>();
+                mutable_bitField0_ |= 0x00000001;
+              }
+              errorSamples_.add(
+                  input.readMessage(com.google.rpc.Status.parser(), extensionRegistry));
+              break;
+            }
+          case 18:
+            {
+              com.google.cloud.retail.v2.ImportErrorsConfig.Builder subBuilder = null;
+              if (errorsConfig_ != null) {
+                subBuilder = errorsConfig_.toBuilder();
+              }
+              errorsConfig_ =
+                  input.readMessage(
+                      com.google.cloud.retail.v2.ImportErrorsConfig.parser(), extensionRegistry);
+              if (subBuilder != null) {
+                subBuilder.mergeFrom(errorsConfig_);
+                errorsConfig_ = subBuilder.buildPartial();
+              }
+
+              break;
+            }
+          case 26:
+            {
+              com.google.cloud.retail.v2.UserEventImportSummary.Builder subBuilder = null;
+              if (importSummary_ != null) {
+                subBuilder = importSummary_.toBuilder();
+              }
+              importSummary_ =
+                  input.readMessage(
+                      com.google.cloud.retail.v2.UserEventImportSummary.parser(),
+                      extensionRegistry);
+              if (subBuilder != null) {
+                subBuilder.mergeFrom(importSummary_);
+                importSummary_ = subBuilder.buildPartial();
+              }
+
+              break;
+            }
+          default:
+            {
+              if (!parseUnknownField(input, unknownFields, extensionRegistry, tag)) {
+                done = true;
+              }
+              break;
+            }
+        }
+      }
+    } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+      throw e.setUnfinishedMessage(this);
+    } catch (java.io.IOException e) {
+      throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
+    } finally {
+      if (((mutable_bitField0_ & 0x00000001) != 0)) {
+        errorSamples_ = java.util.Collections.unmodifiableList(errorSamples_);
+      }
+      this.unknownFields = unknownFields.build();
+      makeExtensionsImmutable();
+    }
+  }
+
+  public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+    return com.google.cloud.retail.v2.ImportConfigProto
+        .internal_static_google_cloud_retail_v2_ImportUserEventsResponse_descriptor;
+  }
+
+  @java.lang.Override
+  protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internalGetFieldAccessorTable() {
+    return com.google.cloud.retail.v2.ImportConfigProto
+        .internal_static_google_cloud_retail_v2_ImportUserEventsResponse_fieldAccessorTable
+        .ensureFieldAccessorsInitialized(
+            com.google.cloud.retail.v2.ImportUserEventsResponse.class,
+            com.google.cloud.retail.v2.ImportUserEventsResponse.Builder.class);
+  }
+
+  public static final int ERROR_SAMPLES_FIELD_NUMBER = 1;
+  private java.util.List<com.google.rpc.Status> errorSamples_;
+  /**
+   *
+   *
+   * <pre>
+   * A sample of errors encountered while processing the request.
+   * </pre>
+   *
+   * <code>repeated .google.rpc.Status error_samples = 1;</code>
+   */
+  @java.lang.Override
+  public java.util.List<com.google.rpc.Status> getErrorSamplesList() {
+    return errorSamples_;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * A sample of errors encountered while processing the request.
+   * </pre>
+   *
+   * <code>repeated .google.rpc.Status error_samples = 1;</code>
+   */
+  @java.lang.Override
+  public java.util.List<? extends com.google.rpc.StatusOrBuilder> getErrorSamplesOrBuilderList() {
+    return errorSamples_;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * A sample of errors encountered while processing the request.
+   * </pre>
+   *
+   * <code>repeated .google.rpc.Status error_samples = 1;</code>
+   */
+  @java.lang.Override
+  public int getErrorSamplesCount() {
+    return errorSamples_.size();
+  }
+  /**
+   *
+   *
+   * <pre>
+   * A sample of errors encountered while processing the request.
+   * </pre>
+   *
+   * <code>repeated .google.rpc.Status error_samples = 1;</code>
+   */
+  @java.lang.Override
+  public com.google.rpc.Status getErrorSamples(int index) {
+    return errorSamples_.get(index);
+  }
+  /**
+   *
+   *
+   * <pre>
+   * A sample of errors encountered while processing the request.
+   * </pre>
+   *
+   * <code>repeated .google.rpc.Status error_samples = 1;</code>
+   */
+  @java.lang.Override
+  public com.google.rpc.StatusOrBuilder getErrorSamplesOrBuilder(int index) {
+    return errorSamples_.get(index);
+  }
+
+  public static final int ERRORS_CONFIG_FIELD_NUMBER = 2;
+  private com.google.cloud.retail.v2.ImportErrorsConfig errorsConfig_;
+  /**
+   *
+   *
+   * <pre>
+   * Echoes the destination for the complete errors if this field was set in
+   * the request.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.ImportErrorsConfig errors_config = 2;</code>
+   *
+   * @return Whether the errorsConfig field is set.
+   */
+  @java.lang.Override
+  public boolean hasErrorsConfig() {
+    return errorsConfig_ != null;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Echoes the destination for the complete errors if this field was set in
+   * the request.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.ImportErrorsConfig errors_config = 2;</code>
+   *
+   * @return The errorsConfig.
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.ImportErrorsConfig getErrorsConfig() {
+    return errorsConfig_ == null
+        ? com.google.cloud.retail.v2.ImportErrorsConfig.getDefaultInstance()
+        : errorsConfig_;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Echoes the destination for the complete errors if this field was set in
+   * the request.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.ImportErrorsConfig errors_config = 2;</code>
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.ImportErrorsConfigOrBuilder getErrorsConfigOrBuilder() {
+    return getErrorsConfig();
+  }
+
+  public static final int IMPORT_SUMMARY_FIELD_NUMBER = 3;
+  private com.google.cloud.retail.v2.UserEventImportSummary importSummary_;
+  /**
+   *
+   *
+   * <pre>
+   * Aggregated statistics of user event import status.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.UserEventImportSummary import_summary = 3;</code>
+   *
+   * @return Whether the importSummary field is set.
+   */
+  @java.lang.Override
+  public boolean hasImportSummary() {
+    return importSummary_ != null;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Aggregated statistics of user event import status.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.UserEventImportSummary import_summary = 3;</code>
+   *
+   * @return The importSummary.
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.UserEventImportSummary getImportSummary() {
+    return importSummary_ == null
+        ? com.google.cloud.retail.v2.UserEventImportSummary.getDefaultInstance()
+        : importSummary_;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Aggregated statistics of user event import status.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.UserEventImportSummary import_summary = 3;</code>
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.UserEventImportSummaryOrBuilder getImportSummaryOrBuilder() {
+    return getImportSummary();
+  }
+
+  private byte memoizedIsInitialized = -1;
+
+  @java.lang.Override
+  public final boolean isInitialized() {
+    byte isInitialized = memoizedIsInitialized;
+    if (isInitialized == 1) return true;
+    if (isInitialized == 0) return false;
+
+    memoizedIsInitialized = 1;
+    return true;
+  }
+
+  @java.lang.Override
+  public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
+    for (int i = 0; i < errorSamples_.size(); i++) {
+      output.writeMessage(1, errorSamples_.get(i));
+    }
+    if (errorsConfig_ != null) {
+      output.writeMessage(2, getErrorsConfig());
+    }
+    if (importSummary_ != null) {
+      output.writeMessage(3, getImportSummary());
+    }
+    unknownFields.writeTo(output);
+  }
+
+  @java.lang.Override
+  public int getSerializedSize() {
+    int size = memoizedSize;
+    if (size != -1) return size;
+
+    size = 0;
+    for (int i = 0; i < errorSamples_.size(); i++) {
+      size += com.google.protobuf.CodedOutputStream.computeMessageSize(1, errorSamples_.get(i));
+    }
+    if (errorsConfig_ != null) {
+      size += com.google.protobuf.CodedOutputStream.computeMessageSize(2, getErrorsConfig());
+    }
+    if (importSummary_ != null) {
+      size += com.google.protobuf.CodedOutputStream.computeMessageSize(3, getImportSummary());
+    }
+    size += unknownFields.getSerializedSize();
+    memoizedSize = size;
+    return size;
+  }
+
+  @java.lang.Override
+  public boolean equals(final java.lang.Object obj) {
+    if (obj == this) {
+      return true;
+    }
+    if (!(obj instanceof com.google.cloud.retail.v2.ImportUserEventsResponse)) {
+      return super.equals(obj);
+    }
+    com.google.cloud.retail.v2.ImportUserEventsResponse other =
+        (com.google.cloud.retail.v2.ImportUserEventsResponse) obj;
+
+    if (!getErrorSamplesList().equals(other.getErrorSamplesList())) return false;
+    if (hasErrorsConfig() != other.hasErrorsConfig()) return false;
+    if (hasErrorsConfig()) {
+      if (!getErrorsConfig().equals(other.getErrorsConfig())) return false;
+    }
+    if (hasImportSummary() != other.hasImportSummary()) return false;
+    if (hasImportSummary()) {
+      if (!getImportSummary().equals(other.getImportSummary())) return false;
+    }
+    if (!unknownFields.equals(other.unknownFields)) return false;
+    return true;
+  }
+
+  @java.lang.Override
+  public int hashCode() {
+    if (memoizedHashCode != 0) {
+      return memoizedHashCode;
+    }
+    int hash = 41;
+    hash = (19 * hash) + getDescriptor().hashCode();
+    if (getErrorSamplesCount() > 0) {
+      hash = (37 * hash) + ERROR_SAMPLES_FIELD_NUMBER;
+      hash = (53 * hash) + getErrorSamplesList().hashCode();
+    }
+    if (hasErrorsConfig()) {
+      hash = (37 * hash) + ERRORS_CONFIG_FIELD_NUMBER;
+      hash = (53 * hash) + getErrorsConfig().hashCode();
+    }
+    if (hasImportSummary()) {
+      hash = (37 * hash) + IMPORT_SUMMARY_FIELD_NUMBER;
+      hash = (53 * hash) + getImportSummary().hashCode();
+    }
+    hash = (29 * hash) + unknownFields.hashCode();
+    memoizedHashCode = hash;
+    return hash;
+  }
+
+  public static com.google.cloud.retail.v2.ImportUserEventsResponse parseFrom(
+      java.nio.ByteBuffer data) throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.ImportUserEventsResponse parseFrom(
+      java.nio.ByteBuffer data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.ImportUserEventsResponse parseFrom(
+      com.google.protobuf.ByteString data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.ImportUserEventsResponse parseFrom(
+      com.google.protobuf.ByteString data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.ImportUserEventsResponse parseFrom(byte[] data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.ImportUserEventsResponse parseFrom(
+      byte[] data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.ImportUserEventsResponse parseFrom(
+      java.io.InputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.ImportUserEventsResponse parseFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.ImportUserEventsResponse parseDelimitedFrom(
+      java.io.InputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.ImportUserEventsResponse parseDelimitedFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.ImportUserEventsResponse parseFrom(
+      com.google.protobuf.CodedInputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.ImportUserEventsResponse parseFrom(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  @java.lang.Override
+  public Builder newBuilderForType() {
+    return newBuilder();
+  }
+
+  public static Builder newBuilder() {
+    return DEFAULT_INSTANCE.toBuilder();
+  }
+
+  public static Builder newBuilder(com.google.cloud.retail.v2.ImportUserEventsResponse prototype) {
+    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+  }
+
+  @java.lang.Override
+  public Builder toBuilder() {
+    return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
+  }
+
+  @java.lang.Override
+  protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+    Builder builder = new Builder(parent);
+    return builder;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Response of the ImportUserEventsRequest. If the long running
+   * operation was successful, then this message is returned by the
+   * google.longrunning.Operations.response field if the operation was successful.
+   * </pre>
+   *
+   * Protobuf type {@code google.cloud.retail.v2.ImportUserEventsResponse}
+   */
+  public static final class Builder extends com.google.protobuf.GeneratedMessageV3.Builder<Builder>
+      implements
+      // @@protoc_insertion_point(builder_implements:google.cloud.retail.v2.ImportUserEventsResponse)
+      com.google.cloud.retail.v2.ImportUserEventsResponseOrBuilder {
+    public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+      return com.google.cloud.retail.v2.ImportConfigProto
+          .internal_static_google_cloud_retail_v2_ImportUserEventsResponse_descriptor;
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return com.google.cloud.retail.v2.ImportConfigProto
+          .internal_static_google_cloud_retail_v2_ImportUserEventsResponse_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              com.google.cloud.retail.v2.ImportUserEventsResponse.class,
+              com.google.cloud.retail.v2.ImportUserEventsResponse.Builder.class);
+    }
+
+    // Construct using com.google.cloud.retail.v2.ImportUserEventsResponse.newBuilder()
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
+
+    private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+      super(parent);
+      maybeForceBuilderInitialization();
+    }
+
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders) {
+        getErrorSamplesFieldBuilder();
+      }
+    }
+
+    @java.lang.Override
+    public Builder clear() {
+      super.clear();
+      if (errorSamplesBuilder_ == null) {
+        errorSamples_ = java.util.Collections.emptyList();
+        bitField0_ = (bitField0_ & ~0x00000001);
+      } else {
+        errorSamplesBuilder_.clear();
+      }
+      if (errorsConfigBuilder_ == null) {
+        errorsConfig_ = null;
+      } else {
+        errorsConfig_ = null;
+        errorsConfigBuilder_ = null;
+      }
+      if (importSummaryBuilder_ == null) {
+        importSummary_ = null;
+      } else {
+        importSummary_ = null;
+        importSummaryBuilder_ = null;
+      }
+      return this;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
+      return com.google.cloud.retail.v2.ImportConfigProto
+          .internal_static_google_cloud_retail_v2_ImportUserEventsResponse_descriptor;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.ImportUserEventsResponse getDefaultInstanceForType() {
+      return com.google.cloud.retail.v2.ImportUserEventsResponse.getDefaultInstance();
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.ImportUserEventsResponse build() {
+      com.google.cloud.retail.v2.ImportUserEventsResponse result = buildPartial();
+      if (!result.isInitialized()) {
+        throw newUninitializedMessageException(result);
+      }
+      return result;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.ImportUserEventsResponse buildPartial() {
+      com.google.cloud.retail.v2.ImportUserEventsResponse result =
+          new com.google.cloud.retail.v2.ImportUserEventsResponse(this);
+      int from_bitField0_ = bitField0_;
+      if (errorSamplesBuilder_ == null) {
+        if (((bitField0_ & 0x00000001) != 0)) {
+          errorSamples_ = java.util.Collections.unmodifiableList(errorSamples_);
+          bitField0_ = (bitField0_ & ~0x00000001);
+        }
+        result.errorSamples_ = errorSamples_;
+      } else {
+        result.errorSamples_ = errorSamplesBuilder_.build();
+      }
+      if (errorsConfigBuilder_ == null) {
+        result.errorsConfig_ = errorsConfig_;
+      } else {
+        result.errorsConfig_ = errorsConfigBuilder_.build();
+      }
+      if (importSummaryBuilder_ == null) {
+        result.importSummary_ = importSummary_;
+      } else {
+        result.importSummary_ = importSummaryBuilder_.build();
+      }
+      onBuilt();
+      return result;
+    }
+
+    @java.lang.Override
+    public Builder clone() {
+      return super.clone();
+    }
+
+    @java.lang.Override
+    public Builder setField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.setField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
+      return super.clearField(field);
+    }
+
+    @java.lang.Override
+    public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+      return super.clearOneof(oneof);
+    }
+
+    @java.lang.Override
+    public Builder setRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, int index, java.lang.Object value) {
+      return super.setRepeatedField(field, index, value);
+    }
+
+    @java.lang.Override
+    public Builder addRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.addRepeatedField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(com.google.protobuf.Message other) {
+      if (other instanceof com.google.cloud.retail.v2.ImportUserEventsResponse) {
+        return mergeFrom((com.google.cloud.retail.v2.ImportUserEventsResponse) other);
+      } else {
+        super.mergeFrom(other);
+        return this;
+      }
+    }
+
+    public Builder mergeFrom(com.google.cloud.retail.v2.ImportUserEventsResponse other) {
+      if (other == com.google.cloud.retail.v2.ImportUserEventsResponse.getDefaultInstance())
+        return this;
+      if (errorSamplesBuilder_ == null) {
+        if (!other.errorSamples_.isEmpty()) {
+          if (errorSamples_.isEmpty()) {
+            errorSamples_ = other.errorSamples_;
+            bitField0_ = (bitField0_ & ~0x00000001);
+          } else {
+            ensureErrorSamplesIsMutable();
+            errorSamples_.addAll(other.errorSamples_);
+          }
+          onChanged();
+        }
+      } else {
+        if (!other.errorSamples_.isEmpty()) {
+          if (errorSamplesBuilder_.isEmpty()) {
+            errorSamplesBuilder_.dispose();
+            errorSamplesBuilder_ = null;
+            errorSamples_ = other.errorSamples_;
+            bitField0_ = (bitField0_ & ~0x00000001);
+            errorSamplesBuilder_ =
+                com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders
+                    ? getErrorSamplesFieldBuilder()
+                    : null;
+          } else {
+            errorSamplesBuilder_.addAllMessages(other.errorSamples_);
+          }
+        }
+      }
+      if (other.hasErrorsConfig()) {
+        mergeErrorsConfig(other.getErrorsConfig());
+      }
+      if (other.hasImportSummary()) {
+        mergeImportSummary(other.getImportSummary());
+      }
+      this.mergeUnknownFields(other.unknownFields);
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final boolean isInitialized() {
+      return true;
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      com.google.cloud.retail.v2.ImportUserEventsResponse parsedMessage = null;
+      try {
+        parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        parsedMessage =
+            (com.google.cloud.retail.v2.ImportUserEventsResponse) e.getUnfinishedMessage();
+        throw e.unwrapIOException();
+      } finally {
+        if (parsedMessage != null) {
+          mergeFrom(parsedMessage);
+        }
+      }
+      return this;
+    }
+
+    private int bitField0_;
+
+    private java.util.List<com.google.rpc.Status> errorSamples_ = java.util.Collections.emptyList();
+
+    private void ensureErrorSamplesIsMutable() {
+      if (!((bitField0_ & 0x00000001) != 0)) {
+        errorSamples_ = new java.util.ArrayList<com.google.rpc.Status>(errorSamples_);
+        bitField0_ |= 0x00000001;
+      }
+    }
+
+    private com.google.protobuf.RepeatedFieldBuilderV3<
+            com.google.rpc.Status, com.google.rpc.Status.Builder, com.google.rpc.StatusOrBuilder>
+        errorSamplesBuilder_;
+
+    /**
+     *
+     *
+     * <pre>
+     * A sample of errors encountered while processing the request.
+     * </pre>
+     *
+     * <code>repeated .google.rpc.Status error_samples = 1;</code>
+     */
+    public java.util.List<com.google.rpc.Status> getErrorSamplesList() {
+      if (errorSamplesBuilder_ == null) {
+        return java.util.Collections.unmodifiableList(errorSamples_);
+      } else {
+        return errorSamplesBuilder_.getMessageList();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A sample of errors encountered while processing the request.
+     * </pre>
+     *
+     * <code>repeated .google.rpc.Status error_samples = 1;</code>
+     */
+    public int getErrorSamplesCount() {
+      if (errorSamplesBuilder_ == null) {
+        return errorSamples_.size();
+      } else {
+        return errorSamplesBuilder_.getCount();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A sample of errors encountered while processing the request.
+     * </pre>
+     *
+     * <code>repeated .google.rpc.Status error_samples = 1;</code>
+     */
+    public com.google.rpc.Status getErrorSamples(int index) {
+      if (errorSamplesBuilder_ == null) {
+        return errorSamples_.get(index);
+      } else {
+        return errorSamplesBuilder_.getMessage(index);
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A sample of errors encountered while processing the request.
+     * </pre>
+     *
+     * <code>repeated .google.rpc.Status error_samples = 1;</code>
+     */
+    public Builder setErrorSamples(int index, com.google.rpc.Status value) {
+      if (errorSamplesBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        ensureErrorSamplesIsMutable();
+        errorSamples_.set(index, value);
+        onChanged();
+      } else {
+        errorSamplesBuilder_.setMessage(index, value);
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A sample of errors encountered while processing the request.
+     * </pre>
+     *
+     * <code>repeated .google.rpc.Status error_samples = 1;</code>
+     */
+    public Builder setErrorSamples(int index, com.google.rpc.Status.Builder builderForValue) {
+      if (errorSamplesBuilder_ == null) {
+        ensureErrorSamplesIsMutable();
+        errorSamples_.set(index, builderForValue.build());
+        onChanged();
+      } else {
+        errorSamplesBuilder_.setMessage(index, builderForValue.build());
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A sample of errors encountered while processing the request.
+     * </pre>
+     *
+     * <code>repeated .google.rpc.Status error_samples = 1;</code>
+     */
+    public Builder addErrorSamples(com.google.rpc.Status value) {
+      if (errorSamplesBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        ensureErrorSamplesIsMutable();
+        errorSamples_.add(value);
+        onChanged();
+      } else {
+        errorSamplesBuilder_.addMessage(value);
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A sample of errors encountered while processing the request.
+     * </pre>
+     *
+     * <code>repeated .google.rpc.Status error_samples = 1;</code>
+     */
+    public Builder addErrorSamples(int index, com.google.rpc.Status value) {
+      if (errorSamplesBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        ensureErrorSamplesIsMutable();
+        errorSamples_.add(index, value);
+        onChanged();
+      } else {
+        errorSamplesBuilder_.addMessage(index, value);
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A sample of errors encountered while processing the request.
+     * </pre>
+     *
+     * <code>repeated .google.rpc.Status error_samples = 1;</code>
+     */
+    public Builder addErrorSamples(com.google.rpc.Status.Builder builderForValue) {
+      if (errorSamplesBuilder_ == null) {
+        ensureErrorSamplesIsMutable();
+        errorSamples_.add(builderForValue.build());
+        onChanged();
+      } else {
+        errorSamplesBuilder_.addMessage(builderForValue.build());
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A sample of errors encountered while processing the request.
+     * </pre>
+     *
+     * <code>repeated .google.rpc.Status error_samples = 1;</code>
+     */
+    public Builder addErrorSamples(int index, com.google.rpc.Status.Builder builderForValue) {
+      if (errorSamplesBuilder_ == null) {
+        ensureErrorSamplesIsMutable();
+        errorSamples_.add(index, builderForValue.build());
+        onChanged();
+      } else {
+        errorSamplesBuilder_.addMessage(index, builderForValue.build());
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A sample of errors encountered while processing the request.
+     * </pre>
+     *
+     * <code>repeated .google.rpc.Status error_samples = 1;</code>
+     */
+    public Builder addAllErrorSamples(java.lang.Iterable<? extends com.google.rpc.Status> values) {
+      if (errorSamplesBuilder_ == null) {
+        ensureErrorSamplesIsMutable();
+        com.google.protobuf.AbstractMessageLite.Builder.addAll(values, errorSamples_);
+        onChanged();
+      } else {
+        errorSamplesBuilder_.addAllMessages(values);
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A sample of errors encountered while processing the request.
+     * </pre>
+     *
+     * <code>repeated .google.rpc.Status error_samples = 1;</code>
+     */
+    public Builder clearErrorSamples() {
+      if (errorSamplesBuilder_ == null) {
+        errorSamples_ = java.util.Collections.emptyList();
+        bitField0_ = (bitField0_ & ~0x00000001);
+        onChanged();
+      } else {
+        errorSamplesBuilder_.clear();
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A sample of errors encountered while processing the request.
+     * </pre>
+     *
+     * <code>repeated .google.rpc.Status error_samples = 1;</code>
+     */
+    public Builder removeErrorSamples(int index) {
+      if (errorSamplesBuilder_ == null) {
+        ensureErrorSamplesIsMutable();
+        errorSamples_.remove(index);
+        onChanged();
+      } else {
+        errorSamplesBuilder_.remove(index);
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A sample of errors encountered while processing the request.
+     * </pre>
+     *
+     * <code>repeated .google.rpc.Status error_samples = 1;</code>
+     */
+    public com.google.rpc.Status.Builder getErrorSamplesBuilder(int index) {
+      return getErrorSamplesFieldBuilder().getBuilder(index);
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A sample of errors encountered while processing the request.
+     * </pre>
+     *
+     * <code>repeated .google.rpc.Status error_samples = 1;</code>
+     */
+    public com.google.rpc.StatusOrBuilder getErrorSamplesOrBuilder(int index) {
+      if (errorSamplesBuilder_ == null) {
+        return errorSamples_.get(index);
+      } else {
+        return errorSamplesBuilder_.getMessageOrBuilder(index);
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A sample of errors encountered while processing the request.
+     * </pre>
+     *
+     * <code>repeated .google.rpc.Status error_samples = 1;</code>
+     */
+    public java.util.List<? extends com.google.rpc.StatusOrBuilder> getErrorSamplesOrBuilderList() {
+      if (errorSamplesBuilder_ != null) {
+        return errorSamplesBuilder_.getMessageOrBuilderList();
+      } else {
+        return java.util.Collections.unmodifiableList(errorSamples_);
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A sample of errors encountered while processing the request.
+     * </pre>
+     *
+     * <code>repeated .google.rpc.Status error_samples = 1;</code>
+     */
+    public com.google.rpc.Status.Builder addErrorSamplesBuilder() {
+      return getErrorSamplesFieldBuilder().addBuilder(com.google.rpc.Status.getDefaultInstance());
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A sample of errors encountered while processing the request.
+     * </pre>
+     *
+     * <code>repeated .google.rpc.Status error_samples = 1;</code>
+     */
+    public com.google.rpc.Status.Builder addErrorSamplesBuilder(int index) {
+      return getErrorSamplesFieldBuilder()
+          .addBuilder(index, com.google.rpc.Status.getDefaultInstance());
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A sample of errors encountered while processing the request.
+     * </pre>
+     *
+     * <code>repeated .google.rpc.Status error_samples = 1;</code>
+     */
+    public java.util.List<com.google.rpc.Status.Builder> getErrorSamplesBuilderList() {
+      return getErrorSamplesFieldBuilder().getBuilderList();
+    }
+
+    private com.google.protobuf.RepeatedFieldBuilderV3<
+            com.google.rpc.Status, com.google.rpc.Status.Builder, com.google.rpc.StatusOrBuilder>
+        getErrorSamplesFieldBuilder() {
+      if (errorSamplesBuilder_ == null) {
+        errorSamplesBuilder_ =
+            new com.google.protobuf.RepeatedFieldBuilderV3<
+                com.google.rpc.Status,
+                com.google.rpc.Status.Builder,
+                com.google.rpc.StatusOrBuilder>(
+                errorSamples_, ((bitField0_ & 0x00000001) != 0), getParentForChildren(), isClean());
+        errorSamples_ = null;
+      }
+      return errorSamplesBuilder_;
+    }
+
+    private com.google.cloud.retail.v2.ImportErrorsConfig errorsConfig_;
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.cloud.retail.v2.ImportErrorsConfig,
+            com.google.cloud.retail.v2.ImportErrorsConfig.Builder,
+            com.google.cloud.retail.v2.ImportErrorsConfigOrBuilder>
+        errorsConfigBuilder_;
+    /**
+     *
+     *
+     * <pre>
+     * Echoes the destination for the complete errors if this field was set in
+     * the request.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.ImportErrorsConfig errors_config = 2;</code>
+     *
+     * @return Whether the errorsConfig field is set.
+     */
+    public boolean hasErrorsConfig() {
+      return errorsConfigBuilder_ != null || errorsConfig_ != null;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Echoes the destination for the complete errors if this field was set in
+     * the request.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.ImportErrorsConfig errors_config = 2;</code>
+     *
+     * @return The errorsConfig.
+     */
+    public com.google.cloud.retail.v2.ImportErrorsConfig getErrorsConfig() {
+      if (errorsConfigBuilder_ == null) {
+        return errorsConfig_ == null
+            ? com.google.cloud.retail.v2.ImportErrorsConfig.getDefaultInstance()
+            : errorsConfig_;
+      } else {
+        return errorsConfigBuilder_.getMessage();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Echoes the destination for the complete errors if this field was set in
+     * the request.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.ImportErrorsConfig errors_config = 2;</code>
+     */
+    public Builder setErrorsConfig(com.google.cloud.retail.v2.ImportErrorsConfig value) {
+      if (errorsConfigBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        errorsConfig_ = value;
+        onChanged();
+      } else {
+        errorsConfigBuilder_.setMessage(value);
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Echoes the destination for the complete errors if this field was set in
+     * the request.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.ImportErrorsConfig errors_config = 2;</code>
+     */
+    public Builder setErrorsConfig(
+        com.google.cloud.retail.v2.ImportErrorsConfig.Builder builderForValue) {
+      if (errorsConfigBuilder_ == null) {
+        errorsConfig_ = builderForValue.build();
+        onChanged();
+      } else {
+        errorsConfigBuilder_.setMessage(builderForValue.build());
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Echoes the destination for the complete errors if this field was set in
+     * the request.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.ImportErrorsConfig errors_config = 2;</code>
+     */
+    public Builder mergeErrorsConfig(com.google.cloud.retail.v2.ImportErrorsConfig value) {
+      if (errorsConfigBuilder_ == null) {
+        if (errorsConfig_ != null) {
+          errorsConfig_ =
+              com.google.cloud.retail.v2.ImportErrorsConfig.newBuilder(errorsConfig_)
+                  .mergeFrom(value)
+                  .buildPartial();
+        } else {
+          errorsConfig_ = value;
+        }
+        onChanged();
+      } else {
+        errorsConfigBuilder_.mergeFrom(value);
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Echoes the destination for the complete errors if this field was set in
+     * the request.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.ImportErrorsConfig errors_config = 2;</code>
+     */
+    public Builder clearErrorsConfig() {
+      if (errorsConfigBuilder_ == null) {
+        errorsConfig_ = null;
+        onChanged();
+      } else {
+        errorsConfig_ = null;
+        errorsConfigBuilder_ = null;
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Echoes the destination for the complete errors if this field was set in
+     * the request.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.ImportErrorsConfig errors_config = 2;</code>
+     */
+    public com.google.cloud.retail.v2.ImportErrorsConfig.Builder getErrorsConfigBuilder() {
+
+      onChanged();
+      return getErrorsConfigFieldBuilder().getBuilder();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Echoes the destination for the complete errors if this field was set in
+     * the request.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.ImportErrorsConfig errors_config = 2;</code>
+     */
+    public com.google.cloud.retail.v2.ImportErrorsConfigOrBuilder getErrorsConfigOrBuilder() {
+      if (errorsConfigBuilder_ != null) {
+        return errorsConfigBuilder_.getMessageOrBuilder();
+      } else {
+        return errorsConfig_ == null
+            ? com.google.cloud.retail.v2.ImportErrorsConfig.getDefaultInstance()
+            : errorsConfig_;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Echoes the destination for the complete errors if this field was set in
+     * the request.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.ImportErrorsConfig errors_config = 2;</code>
+     */
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.cloud.retail.v2.ImportErrorsConfig,
+            com.google.cloud.retail.v2.ImportErrorsConfig.Builder,
+            com.google.cloud.retail.v2.ImportErrorsConfigOrBuilder>
+        getErrorsConfigFieldBuilder() {
+      if (errorsConfigBuilder_ == null) {
+        errorsConfigBuilder_ =
+            new com.google.protobuf.SingleFieldBuilderV3<
+                com.google.cloud.retail.v2.ImportErrorsConfig,
+                com.google.cloud.retail.v2.ImportErrorsConfig.Builder,
+                com.google.cloud.retail.v2.ImportErrorsConfigOrBuilder>(
+                getErrorsConfig(), getParentForChildren(), isClean());
+        errorsConfig_ = null;
+      }
+      return errorsConfigBuilder_;
+    }
+
+    private com.google.cloud.retail.v2.UserEventImportSummary importSummary_;
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.cloud.retail.v2.UserEventImportSummary,
+            com.google.cloud.retail.v2.UserEventImportSummary.Builder,
+            com.google.cloud.retail.v2.UserEventImportSummaryOrBuilder>
+        importSummaryBuilder_;
+    /**
+     *
+     *
+     * <pre>
+     * Aggregated statistics of user event import status.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.UserEventImportSummary import_summary = 3;</code>
+     *
+     * @return Whether the importSummary field is set.
+     */
+    public boolean hasImportSummary() {
+      return importSummaryBuilder_ != null || importSummary_ != null;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Aggregated statistics of user event import status.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.UserEventImportSummary import_summary = 3;</code>
+     *
+     * @return The importSummary.
+     */
+    public com.google.cloud.retail.v2.UserEventImportSummary getImportSummary() {
+      if (importSummaryBuilder_ == null) {
+        return importSummary_ == null
+            ? com.google.cloud.retail.v2.UserEventImportSummary.getDefaultInstance()
+            : importSummary_;
+      } else {
+        return importSummaryBuilder_.getMessage();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Aggregated statistics of user event import status.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.UserEventImportSummary import_summary = 3;</code>
+     */
+    public Builder setImportSummary(com.google.cloud.retail.v2.UserEventImportSummary value) {
+      if (importSummaryBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        importSummary_ = value;
+        onChanged();
+      } else {
+        importSummaryBuilder_.setMessage(value);
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Aggregated statistics of user event import status.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.UserEventImportSummary import_summary = 3;</code>
+     */
+    public Builder setImportSummary(
+        com.google.cloud.retail.v2.UserEventImportSummary.Builder builderForValue) {
+      if (importSummaryBuilder_ == null) {
+        importSummary_ = builderForValue.build();
+        onChanged();
+      } else {
+        importSummaryBuilder_.setMessage(builderForValue.build());
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Aggregated statistics of user event import status.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.UserEventImportSummary import_summary = 3;</code>
+     */
+    public Builder mergeImportSummary(com.google.cloud.retail.v2.UserEventImportSummary value) {
+      if (importSummaryBuilder_ == null) {
+        if (importSummary_ != null) {
+          importSummary_ =
+              com.google.cloud.retail.v2.UserEventImportSummary.newBuilder(importSummary_)
+                  .mergeFrom(value)
+                  .buildPartial();
+        } else {
+          importSummary_ = value;
+        }
+        onChanged();
+      } else {
+        importSummaryBuilder_.mergeFrom(value);
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Aggregated statistics of user event import status.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.UserEventImportSummary import_summary = 3;</code>
+     */
+    public Builder clearImportSummary() {
+      if (importSummaryBuilder_ == null) {
+        importSummary_ = null;
+        onChanged();
+      } else {
+        importSummary_ = null;
+        importSummaryBuilder_ = null;
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Aggregated statistics of user event import status.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.UserEventImportSummary import_summary = 3;</code>
+     */
+    public com.google.cloud.retail.v2.UserEventImportSummary.Builder getImportSummaryBuilder() {
+
+      onChanged();
+      return getImportSummaryFieldBuilder().getBuilder();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Aggregated statistics of user event import status.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.UserEventImportSummary import_summary = 3;</code>
+     */
+    public com.google.cloud.retail.v2.UserEventImportSummaryOrBuilder getImportSummaryOrBuilder() {
+      if (importSummaryBuilder_ != null) {
+        return importSummaryBuilder_.getMessageOrBuilder();
+      } else {
+        return importSummary_ == null
+            ? com.google.cloud.retail.v2.UserEventImportSummary.getDefaultInstance()
+            : importSummary_;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Aggregated statistics of user event import status.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.UserEventImportSummary import_summary = 3;</code>
+     */
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.cloud.retail.v2.UserEventImportSummary,
+            com.google.cloud.retail.v2.UserEventImportSummary.Builder,
+            com.google.cloud.retail.v2.UserEventImportSummaryOrBuilder>
+        getImportSummaryFieldBuilder() {
+      if (importSummaryBuilder_ == null) {
+        importSummaryBuilder_ =
+            new com.google.protobuf.SingleFieldBuilderV3<
+                com.google.cloud.retail.v2.UserEventImportSummary,
+                com.google.cloud.retail.v2.UserEventImportSummary.Builder,
+                com.google.cloud.retail.v2.UserEventImportSummaryOrBuilder>(
+                getImportSummary(), getParentForChildren(), isClean());
+        importSummary_ = null;
+      }
+      return importSummaryBuilder_;
+    }
+
+    @java.lang.Override
+    public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.setUnknownFields(unknownFields);
+    }
+
+    @java.lang.Override
+    public final Builder mergeUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.mergeUnknownFields(unknownFields);
+    }
+
+    // @@protoc_insertion_point(builder_scope:google.cloud.retail.v2.ImportUserEventsResponse)
+  }
+
+  // @@protoc_insertion_point(class_scope:google.cloud.retail.v2.ImportUserEventsResponse)
+  private static final com.google.cloud.retail.v2.ImportUserEventsResponse DEFAULT_INSTANCE;
+
+  static {
+    DEFAULT_INSTANCE = new com.google.cloud.retail.v2.ImportUserEventsResponse();
+  }
+
+  public static com.google.cloud.retail.v2.ImportUserEventsResponse getDefaultInstance() {
+    return DEFAULT_INSTANCE;
+  }
+
+  private static final com.google.protobuf.Parser<ImportUserEventsResponse> PARSER =
+      new com.google.protobuf.AbstractParser<ImportUserEventsResponse>() {
+        @java.lang.Override
+        public ImportUserEventsResponse parsePartialFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws com.google.protobuf.InvalidProtocolBufferException {
+          return new ImportUserEventsResponse(input, extensionRegistry);
+        }
+      };
+
+  public static com.google.protobuf.Parser<ImportUserEventsResponse> parser() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.protobuf.Parser<ImportUserEventsResponse> getParserForType() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.cloud.retail.v2.ImportUserEventsResponse getDefaultInstanceForType() {
+    return DEFAULT_INSTANCE;
+  }
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ImportUserEventsResponseOrBuilder.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ImportUserEventsResponseOrBuilder.java
new file mode 100644
index 00000000..cc871eed
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ImportUserEventsResponseOrBuilder.java
@@ -0,0 +1,149 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/import_config.proto
+
+package com.google.cloud.retail.v2;
+
+public interface ImportUserEventsResponseOrBuilder
+    extends
+    // @@protoc_insertion_point(interface_extends:google.cloud.retail.v2.ImportUserEventsResponse)
+    com.google.protobuf.MessageOrBuilder {
+
+  /**
+   *
+   *
+   * <pre>
+   * A sample of errors encountered while processing the request.
+   * </pre>
+   *
+   * <code>repeated .google.rpc.Status error_samples = 1;</code>
+   */
+  java.util.List<com.google.rpc.Status> getErrorSamplesList();
+  /**
+   *
+   *
+   * <pre>
+   * A sample of errors encountered while processing the request.
+   * </pre>
+   *
+   * <code>repeated .google.rpc.Status error_samples = 1;</code>
+   */
+  com.google.rpc.Status getErrorSamples(int index);
+  /**
+   *
+   *
+   * <pre>
+   * A sample of errors encountered while processing the request.
+   * </pre>
+   *
+   * <code>repeated .google.rpc.Status error_samples = 1;</code>
+   */
+  int getErrorSamplesCount();
+  /**
+   *
+   *
+   * <pre>
+   * A sample of errors encountered while processing the request.
+   * </pre>
+   *
+   * <code>repeated .google.rpc.Status error_samples = 1;</code>
+   */
+  java.util.List<? extends com.google.rpc.StatusOrBuilder> getErrorSamplesOrBuilderList();
+  /**
+   *
+   *
+   * <pre>
+   * A sample of errors encountered while processing the request.
+   * </pre>
+   *
+   * <code>repeated .google.rpc.Status error_samples = 1;</code>
+   */
+  com.google.rpc.StatusOrBuilder getErrorSamplesOrBuilder(int index);
+
+  /**
+   *
+   *
+   * <pre>
+   * Echoes the destination for the complete errors if this field was set in
+   * the request.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.ImportErrorsConfig errors_config = 2;</code>
+   *
+   * @return Whether the errorsConfig field is set.
+   */
+  boolean hasErrorsConfig();
+  /**
+   *
+   *
+   * <pre>
+   * Echoes the destination for the complete errors if this field was set in
+   * the request.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.ImportErrorsConfig errors_config = 2;</code>
+   *
+   * @return The errorsConfig.
+   */
+  com.google.cloud.retail.v2.ImportErrorsConfig getErrorsConfig();
+  /**
+   *
+   *
+   * <pre>
+   * Echoes the destination for the complete errors if this field was set in
+   * the request.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.ImportErrorsConfig errors_config = 2;</code>
+   */
+  com.google.cloud.retail.v2.ImportErrorsConfigOrBuilder getErrorsConfigOrBuilder();
+
+  /**
+   *
+   *
+   * <pre>
+   * Aggregated statistics of user event import status.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.UserEventImportSummary import_summary = 3;</code>
+   *
+   * @return Whether the importSummary field is set.
+   */
+  boolean hasImportSummary();
+  /**
+   *
+   *
+   * <pre>
+   * Aggregated statistics of user event import status.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.UserEventImportSummary import_summary = 3;</code>
+   *
+   * @return The importSummary.
+   */
+  com.google.cloud.retail.v2.UserEventImportSummary getImportSummary();
+  /**
+   *
+   *
+   * <pre>
+   * Aggregated statistics of user event import status.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.UserEventImportSummary import_summary = 3;</code>
+   */
+  com.google.cloud.retail.v2.UserEventImportSummaryOrBuilder getImportSummaryOrBuilder();
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ListCatalogsRequest.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ListCatalogsRequest.java
new file mode 100644
index 00000000..6b205fd0
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ListCatalogsRequest.java
@@ -0,0 +1,1017 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/catalog_service.proto
+
+package com.google.cloud.retail.v2;
+
+/**
+ *
+ *
+ * <pre>
+ * Request for
+ * [CatalogService.ListCatalogs][google.cloud.retail.v2.CatalogService.ListCatalogs]
+ * method.
+ * </pre>
+ *
+ * Protobuf type {@code google.cloud.retail.v2.ListCatalogsRequest}
+ */
+public final class ListCatalogsRequest extends com.google.protobuf.GeneratedMessageV3
+    implements
+    // @@protoc_insertion_point(message_implements:google.cloud.retail.v2.ListCatalogsRequest)
+    ListCatalogsRequestOrBuilder {
+  private static final long serialVersionUID = 0L;
+  // Use ListCatalogsRequest.newBuilder() to construct.
+  private ListCatalogsRequest(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+    super(builder);
+  }
+
+  private ListCatalogsRequest() {
+    parent_ = "";
+    pageToken_ = "";
+  }
+
+  @java.lang.Override
+  @SuppressWarnings({"unused"})
+  protected java.lang.Object newInstance(UnusedPrivateParameter unused) {
+    return new ListCatalogsRequest();
+  }
+
+  @java.lang.Override
+  public final com.google.protobuf.UnknownFieldSet getUnknownFields() {
+    return this.unknownFields;
+  }
+
+  private ListCatalogsRequest(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    this();
+    if (extensionRegistry == null) {
+      throw new java.lang.NullPointerException();
+    }
+    com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+        com.google.protobuf.UnknownFieldSet.newBuilder();
+    try {
+      boolean done = false;
+      while (!done) {
+        int tag = input.readTag();
+        switch (tag) {
+          case 0:
+            done = true;
+            break;
+          case 10:
+            {
+              java.lang.String s = input.readStringRequireUtf8();
+
+              parent_ = s;
+              break;
+            }
+          case 16:
+            {
+              pageSize_ = input.readInt32();
+              break;
+            }
+          case 26:
+            {
+              java.lang.String s = input.readStringRequireUtf8();
+
+              pageToken_ = s;
+              break;
+            }
+          default:
+            {
+              if (!parseUnknownField(input, unknownFields, extensionRegistry, tag)) {
+                done = true;
+              }
+              break;
+            }
+        }
+      }
+    } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+      throw e.setUnfinishedMessage(this);
+    } catch (java.io.IOException e) {
+      throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
+    } finally {
+      this.unknownFields = unknownFields.build();
+      makeExtensionsImmutable();
+    }
+  }
+
+  public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+    return com.google.cloud.retail.v2.CatalogServiceProto
+        .internal_static_google_cloud_retail_v2_ListCatalogsRequest_descriptor;
+  }
+
+  @java.lang.Override
+  protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internalGetFieldAccessorTable() {
+    return com.google.cloud.retail.v2.CatalogServiceProto
+        .internal_static_google_cloud_retail_v2_ListCatalogsRequest_fieldAccessorTable
+        .ensureFieldAccessorsInitialized(
+            com.google.cloud.retail.v2.ListCatalogsRequest.class,
+            com.google.cloud.retail.v2.ListCatalogsRequest.Builder.class);
+  }
+
+  public static final int PARENT_FIELD_NUMBER = 1;
+  private volatile java.lang.Object parent_;
+  /**
+   *
+   *
+   * <pre>
+   * Required. The account resource name with an associated location.
+   * If the caller does not have permission to list
+   * [Catalog][google.cloud.retail.v2.Catalog]s under this location, regardless
+   * of whether or not this location exists, a PERMISSION_DENIED error is
+   * returned.
+   * </pre>
+   *
+   * <code>
+   * string parent = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+   * </code>
+   *
+   * @return The parent.
+   */
+  @java.lang.Override
+  public java.lang.String getParent() {
+    java.lang.Object ref = parent_;
+    if (ref instanceof java.lang.String) {
+      return (java.lang.String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+      java.lang.String s = bs.toStringUtf8();
+      parent_ = s;
+      return s;
+    }
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Required. The account resource name with an associated location.
+   * If the caller does not have permission to list
+   * [Catalog][google.cloud.retail.v2.Catalog]s under this location, regardless
+   * of whether or not this location exists, a PERMISSION_DENIED error is
+   * returned.
+   * </pre>
+   *
+   * <code>
+   * string parent = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+   * </code>
+   *
+   * @return The bytes for parent.
+   */
+  @java.lang.Override
+  public com.google.protobuf.ByteString getParentBytes() {
+    java.lang.Object ref = parent_;
+    if (ref instanceof java.lang.String) {
+      com.google.protobuf.ByteString b =
+          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+      parent_ = b;
+      return b;
+    } else {
+      return (com.google.protobuf.ByteString) ref;
+    }
+  }
+
+  public static final int PAGE_SIZE_FIELD_NUMBER = 2;
+  private int pageSize_;
+  /**
+   *
+   *
+   * <pre>
+   * Maximum number of [Catalog][google.cloud.retail.v2.Catalog]s to return. If
+   * unspecified, defaults to 50. The maximum allowed value is 1000. Values
+   * above 1000 will be coerced to 1000.
+   * If this field is negative, an INVALID_ARGUMENT is returned.
+   * </pre>
+   *
+   * <code>int32 page_size = 2;</code>
+   *
+   * @return The pageSize.
+   */
+  @java.lang.Override
+  public int getPageSize() {
+    return pageSize_;
+  }
+
+  public static final int PAGE_TOKEN_FIELD_NUMBER = 3;
+  private volatile java.lang.Object pageToken_;
+  /**
+   *
+   *
+   * <pre>
+   * A page token
+   * [ListCatalogsResponse.next_page_token][google.cloud.retail.v2.ListCatalogsResponse.next_page_token],
+   * received from a previous
+   * [CatalogService.ListCatalogs][google.cloud.retail.v2.CatalogService.ListCatalogs]
+   * call. Provide this to retrieve the subsequent page.
+   * When paginating, all other parameters provided to
+   * [CatalogService.ListCatalogs][google.cloud.retail.v2.CatalogService.ListCatalogs]
+   * must match the call that provided the page token. Otherwise, an
+   * INVALID_ARGUMENT error is returned.
+   * </pre>
+   *
+   * <code>string page_token = 3;</code>
+   *
+   * @return The pageToken.
+   */
+  @java.lang.Override
+  public java.lang.String getPageToken() {
+    java.lang.Object ref = pageToken_;
+    if (ref instanceof java.lang.String) {
+      return (java.lang.String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+      java.lang.String s = bs.toStringUtf8();
+      pageToken_ = s;
+      return s;
+    }
+  }
+  /**
+   *
+   *
+   * <pre>
+   * A page token
+   * [ListCatalogsResponse.next_page_token][google.cloud.retail.v2.ListCatalogsResponse.next_page_token],
+   * received from a previous
+   * [CatalogService.ListCatalogs][google.cloud.retail.v2.CatalogService.ListCatalogs]
+   * call. Provide this to retrieve the subsequent page.
+   * When paginating, all other parameters provided to
+   * [CatalogService.ListCatalogs][google.cloud.retail.v2.CatalogService.ListCatalogs]
+   * must match the call that provided the page token. Otherwise, an
+   * INVALID_ARGUMENT error is returned.
+   * </pre>
+   *
+   * <code>string page_token = 3;</code>
+   *
+   * @return The bytes for pageToken.
+   */
+  @java.lang.Override
+  public com.google.protobuf.ByteString getPageTokenBytes() {
+    java.lang.Object ref = pageToken_;
+    if (ref instanceof java.lang.String) {
+      com.google.protobuf.ByteString b =
+          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+      pageToken_ = b;
+      return b;
+    } else {
+      return (com.google.protobuf.ByteString) ref;
+    }
+  }
+
+  private byte memoizedIsInitialized = -1;
+
+  @java.lang.Override
+  public final boolean isInitialized() {
+    byte isInitialized = memoizedIsInitialized;
+    if (isInitialized == 1) return true;
+    if (isInitialized == 0) return false;
+
+    memoizedIsInitialized = 1;
+    return true;
+  }
+
+  @java.lang.Override
+  public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
+    if (!getParentBytes().isEmpty()) {
+      com.google.protobuf.GeneratedMessageV3.writeString(output, 1, parent_);
+    }
+    if (pageSize_ != 0) {
+      output.writeInt32(2, pageSize_);
+    }
+    if (!getPageTokenBytes().isEmpty()) {
+      com.google.protobuf.GeneratedMessageV3.writeString(output, 3, pageToken_);
+    }
+    unknownFields.writeTo(output);
+  }
+
+  @java.lang.Override
+  public int getSerializedSize() {
+    int size = memoizedSize;
+    if (size != -1) return size;
+
+    size = 0;
+    if (!getParentBytes().isEmpty()) {
+      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(1, parent_);
+    }
+    if (pageSize_ != 0) {
+      size += com.google.protobuf.CodedOutputStream.computeInt32Size(2, pageSize_);
+    }
+    if (!getPageTokenBytes().isEmpty()) {
+      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(3, pageToken_);
+    }
+    size += unknownFields.getSerializedSize();
+    memoizedSize = size;
+    return size;
+  }
+
+  @java.lang.Override
+  public boolean equals(final java.lang.Object obj) {
+    if (obj == this) {
+      return true;
+    }
+    if (!(obj instanceof com.google.cloud.retail.v2.ListCatalogsRequest)) {
+      return super.equals(obj);
+    }
+    com.google.cloud.retail.v2.ListCatalogsRequest other =
+        (com.google.cloud.retail.v2.ListCatalogsRequest) obj;
+
+    if (!getParent().equals(other.getParent())) return false;
+    if (getPageSize() != other.getPageSize()) return false;
+    if (!getPageToken().equals(other.getPageToken())) return false;
+    if (!unknownFields.equals(other.unknownFields)) return false;
+    return true;
+  }
+
+  @java.lang.Override
+  public int hashCode() {
+    if (memoizedHashCode != 0) {
+      return memoizedHashCode;
+    }
+    int hash = 41;
+    hash = (19 * hash) + getDescriptor().hashCode();
+    hash = (37 * hash) + PARENT_FIELD_NUMBER;
+    hash = (53 * hash) + getParent().hashCode();
+    hash = (37 * hash) + PAGE_SIZE_FIELD_NUMBER;
+    hash = (53 * hash) + getPageSize();
+    hash = (37 * hash) + PAGE_TOKEN_FIELD_NUMBER;
+    hash = (53 * hash) + getPageToken().hashCode();
+    hash = (29 * hash) + unknownFields.hashCode();
+    memoizedHashCode = hash;
+    return hash;
+  }
+
+  public static com.google.cloud.retail.v2.ListCatalogsRequest parseFrom(java.nio.ByteBuffer data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.ListCatalogsRequest parseFrom(
+      java.nio.ByteBuffer data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.ListCatalogsRequest parseFrom(
+      com.google.protobuf.ByteString data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.ListCatalogsRequest parseFrom(
+      com.google.protobuf.ByteString data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.ListCatalogsRequest parseFrom(byte[] data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.ListCatalogsRequest parseFrom(
+      byte[] data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.ListCatalogsRequest parseFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.ListCatalogsRequest parseFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.ListCatalogsRequest parseDelimitedFrom(
+      java.io.InputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.ListCatalogsRequest parseDelimitedFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.ListCatalogsRequest parseFrom(
+      com.google.protobuf.CodedInputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.ListCatalogsRequest parseFrom(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  @java.lang.Override
+  public Builder newBuilderForType() {
+    return newBuilder();
+  }
+
+  public static Builder newBuilder() {
+    return DEFAULT_INSTANCE.toBuilder();
+  }
+
+  public static Builder newBuilder(com.google.cloud.retail.v2.ListCatalogsRequest prototype) {
+    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+  }
+
+  @java.lang.Override
+  public Builder toBuilder() {
+    return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
+  }
+
+  @java.lang.Override
+  protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+    Builder builder = new Builder(parent);
+    return builder;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Request for
+   * [CatalogService.ListCatalogs][google.cloud.retail.v2.CatalogService.ListCatalogs]
+   * method.
+   * </pre>
+   *
+   * Protobuf type {@code google.cloud.retail.v2.ListCatalogsRequest}
+   */
+  public static final class Builder extends com.google.protobuf.GeneratedMessageV3.Builder<Builder>
+      implements
+      // @@protoc_insertion_point(builder_implements:google.cloud.retail.v2.ListCatalogsRequest)
+      com.google.cloud.retail.v2.ListCatalogsRequestOrBuilder {
+    public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+      return com.google.cloud.retail.v2.CatalogServiceProto
+          .internal_static_google_cloud_retail_v2_ListCatalogsRequest_descriptor;
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return com.google.cloud.retail.v2.CatalogServiceProto
+          .internal_static_google_cloud_retail_v2_ListCatalogsRequest_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              com.google.cloud.retail.v2.ListCatalogsRequest.class,
+              com.google.cloud.retail.v2.ListCatalogsRequest.Builder.class);
+    }
+
+    // Construct using com.google.cloud.retail.v2.ListCatalogsRequest.newBuilder()
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
+
+    private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+      super(parent);
+      maybeForceBuilderInitialization();
+    }
+
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders) {}
+    }
+
+    @java.lang.Override
+    public Builder clear() {
+      super.clear();
+      parent_ = "";
+
+      pageSize_ = 0;
+
+      pageToken_ = "";
+
+      return this;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
+      return com.google.cloud.retail.v2.CatalogServiceProto
+          .internal_static_google_cloud_retail_v2_ListCatalogsRequest_descriptor;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.ListCatalogsRequest getDefaultInstanceForType() {
+      return com.google.cloud.retail.v2.ListCatalogsRequest.getDefaultInstance();
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.ListCatalogsRequest build() {
+      com.google.cloud.retail.v2.ListCatalogsRequest result = buildPartial();
+      if (!result.isInitialized()) {
+        throw newUninitializedMessageException(result);
+      }
+      return result;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.ListCatalogsRequest buildPartial() {
+      com.google.cloud.retail.v2.ListCatalogsRequest result =
+          new com.google.cloud.retail.v2.ListCatalogsRequest(this);
+      result.parent_ = parent_;
+      result.pageSize_ = pageSize_;
+      result.pageToken_ = pageToken_;
+      onBuilt();
+      return result;
+    }
+
+    @java.lang.Override
+    public Builder clone() {
+      return super.clone();
+    }
+
+    @java.lang.Override
+    public Builder setField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.setField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
+      return super.clearField(field);
+    }
+
+    @java.lang.Override
+    public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+      return super.clearOneof(oneof);
+    }
+
+    @java.lang.Override
+    public Builder setRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, int index, java.lang.Object value) {
+      return super.setRepeatedField(field, index, value);
+    }
+
+    @java.lang.Override
+    public Builder addRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.addRepeatedField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(com.google.protobuf.Message other) {
+      if (other instanceof com.google.cloud.retail.v2.ListCatalogsRequest) {
+        return mergeFrom((com.google.cloud.retail.v2.ListCatalogsRequest) other);
+      } else {
+        super.mergeFrom(other);
+        return this;
+      }
+    }
+
+    public Builder mergeFrom(com.google.cloud.retail.v2.ListCatalogsRequest other) {
+      if (other == com.google.cloud.retail.v2.ListCatalogsRequest.getDefaultInstance()) return this;
+      if (!other.getParent().isEmpty()) {
+        parent_ = other.parent_;
+        onChanged();
+      }
+      if (other.getPageSize() != 0) {
+        setPageSize(other.getPageSize());
+      }
+      if (!other.getPageToken().isEmpty()) {
+        pageToken_ = other.pageToken_;
+        onChanged();
+      }
+      this.mergeUnknownFields(other.unknownFields);
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final boolean isInitialized() {
+      return true;
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      com.google.cloud.retail.v2.ListCatalogsRequest parsedMessage = null;
+      try {
+        parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        parsedMessage = (com.google.cloud.retail.v2.ListCatalogsRequest) e.getUnfinishedMessage();
+        throw e.unwrapIOException();
+      } finally {
+        if (parsedMessage != null) {
+          mergeFrom(parsedMessage);
+        }
+      }
+      return this;
+    }
+
+    private java.lang.Object parent_ = "";
+    /**
+     *
+     *
+     * <pre>
+     * Required. The account resource name with an associated location.
+     * If the caller does not have permission to list
+     * [Catalog][google.cloud.retail.v2.Catalog]s under this location, regardless
+     * of whether or not this location exists, a PERMISSION_DENIED error is
+     * returned.
+     * </pre>
+     *
+     * <code>
+     * string parent = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * </code>
+     *
+     * @return The parent.
+     */
+    public java.lang.String getParent() {
+      java.lang.Object ref = parent_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        parent_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The account resource name with an associated location.
+     * If the caller does not have permission to list
+     * [Catalog][google.cloud.retail.v2.Catalog]s under this location, regardless
+     * of whether or not this location exists, a PERMISSION_DENIED error is
+     * returned.
+     * </pre>
+     *
+     * <code>
+     * string parent = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * </code>
+     *
+     * @return The bytes for parent.
+     */
+    public com.google.protobuf.ByteString getParentBytes() {
+      java.lang.Object ref = parent_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b =
+            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+        parent_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The account resource name with an associated location.
+     * If the caller does not have permission to list
+     * [Catalog][google.cloud.retail.v2.Catalog]s under this location, regardless
+     * of whether or not this location exists, a PERMISSION_DENIED error is
+     * returned.
+     * </pre>
+     *
+     * <code>
+     * string parent = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * </code>
+     *
+     * @param value The parent to set.
+     * @return This builder for chaining.
+     */
+    public Builder setParent(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+
+      parent_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The account resource name with an associated location.
+     * If the caller does not have permission to list
+     * [Catalog][google.cloud.retail.v2.Catalog]s under this location, regardless
+     * of whether or not this location exists, a PERMISSION_DENIED error is
+     * returned.
+     * </pre>
+     *
+     * <code>
+     * string parent = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * </code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearParent() {
+
+      parent_ = getDefaultInstance().getParent();
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The account resource name with an associated location.
+     * If the caller does not have permission to list
+     * [Catalog][google.cloud.retail.v2.Catalog]s under this location, regardless
+     * of whether or not this location exists, a PERMISSION_DENIED error is
+     * returned.
+     * </pre>
+     *
+     * <code>
+     * string parent = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * </code>
+     *
+     * @param value The bytes for parent to set.
+     * @return This builder for chaining.
+     */
+    public Builder setParentBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+
+      parent_ = value;
+      onChanged();
+      return this;
+    }
+
+    private int pageSize_;
+    /**
+     *
+     *
+     * <pre>
+     * Maximum number of [Catalog][google.cloud.retail.v2.Catalog]s to return. If
+     * unspecified, defaults to 50. The maximum allowed value is 1000. Values
+     * above 1000 will be coerced to 1000.
+     * If this field is negative, an INVALID_ARGUMENT is returned.
+     * </pre>
+     *
+     * <code>int32 page_size = 2;</code>
+     *
+     * @return The pageSize.
+     */
+    @java.lang.Override
+    public int getPageSize() {
+      return pageSize_;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Maximum number of [Catalog][google.cloud.retail.v2.Catalog]s to return. If
+     * unspecified, defaults to 50. The maximum allowed value is 1000. Values
+     * above 1000 will be coerced to 1000.
+     * If this field is negative, an INVALID_ARGUMENT is returned.
+     * </pre>
+     *
+     * <code>int32 page_size = 2;</code>
+     *
+     * @param value The pageSize to set.
+     * @return This builder for chaining.
+     */
+    public Builder setPageSize(int value) {
+
+      pageSize_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Maximum number of [Catalog][google.cloud.retail.v2.Catalog]s to return. If
+     * unspecified, defaults to 50. The maximum allowed value is 1000. Values
+     * above 1000 will be coerced to 1000.
+     * If this field is negative, an INVALID_ARGUMENT is returned.
+     * </pre>
+     *
+     * <code>int32 page_size = 2;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearPageSize() {
+
+      pageSize_ = 0;
+      onChanged();
+      return this;
+    }
+
+    private java.lang.Object pageToken_ = "";
+    /**
+     *
+     *
+     * <pre>
+     * A page token
+     * [ListCatalogsResponse.next_page_token][google.cloud.retail.v2.ListCatalogsResponse.next_page_token],
+     * received from a previous
+     * [CatalogService.ListCatalogs][google.cloud.retail.v2.CatalogService.ListCatalogs]
+     * call. Provide this to retrieve the subsequent page.
+     * When paginating, all other parameters provided to
+     * [CatalogService.ListCatalogs][google.cloud.retail.v2.CatalogService.ListCatalogs]
+     * must match the call that provided the page token. Otherwise, an
+     * INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>string page_token = 3;</code>
+     *
+     * @return The pageToken.
+     */
+    public java.lang.String getPageToken() {
+      java.lang.Object ref = pageToken_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        pageToken_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A page token
+     * [ListCatalogsResponse.next_page_token][google.cloud.retail.v2.ListCatalogsResponse.next_page_token],
+     * received from a previous
+     * [CatalogService.ListCatalogs][google.cloud.retail.v2.CatalogService.ListCatalogs]
+     * call. Provide this to retrieve the subsequent page.
+     * When paginating, all other parameters provided to
+     * [CatalogService.ListCatalogs][google.cloud.retail.v2.CatalogService.ListCatalogs]
+     * must match the call that provided the page token. Otherwise, an
+     * INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>string page_token = 3;</code>
+     *
+     * @return The bytes for pageToken.
+     */
+    public com.google.protobuf.ByteString getPageTokenBytes() {
+      java.lang.Object ref = pageToken_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b =
+            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+        pageToken_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A page token
+     * [ListCatalogsResponse.next_page_token][google.cloud.retail.v2.ListCatalogsResponse.next_page_token],
+     * received from a previous
+     * [CatalogService.ListCatalogs][google.cloud.retail.v2.CatalogService.ListCatalogs]
+     * call. Provide this to retrieve the subsequent page.
+     * When paginating, all other parameters provided to
+     * [CatalogService.ListCatalogs][google.cloud.retail.v2.CatalogService.ListCatalogs]
+     * must match the call that provided the page token. Otherwise, an
+     * INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>string page_token = 3;</code>
+     *
+     * @param value The pageToken to set.
+     * @return This builder for chaining.
+     */
+    public Builder setPageToken(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+
+      pageToken_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A page token
+     * [ListCatalogsResponse.next_page_token][google.cloud.retail.v2.ListCatalogsResponse.next_page_token],
+     * received from a previous
+     * [CatalogService.ListCatalogs][google.cloud.retail.v2.CatalogService.ListCatalogs]
+     * call. Provide this to retrieve the subsequent page.
+     * When paginating, all other parameters provided to
+     * [CatalogService.ListCatalogs][google.cloud.retail.v2.CatalogService.ListCatalogs]
+     * must match the call that provided the page token. Otherwise, an
+     * INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>string page_token = 3;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearPageToken() {
+
+      pageToken_ = getDefaultInstance().getPageToken();
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A page token
+     * [ListCatalogsResponse.next_page_token][google.cloud.retail.v2.ListCatalogsResponse.next_page_token],
+     * received from a previous
+     * [CatalogService.ListCatalogs][google.cloud.retail.v2.CatalogService.ListCatalogs]
+     * call. Provide this to retrieve the subsequent page.
+     * When paginating, all other parameters provided to
+     * [CatalogService.ListCatalogs][google.cloud.retail.v2.CatalogService.ListCatalogs]
+     * must match the call that provided the page token. Otherwise, an
+     * INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>string page_token = 3;</code>
+     *
+     * @param value The bytes for pageToken to set.
+     * @return This builder for chaining.
+     */
+    public Builder setPageTokenBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+
+      pageToken_ = value;
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.setUnknownFields(unknownFields);
+    }
+
+    @java.lang.Override
+    public final Builder mergeUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.mergeUnknownFields(unknownFields);
+    }
+
+    // @@protoc_insertion_point(builder_scope:google.cloud.retail.v2.ListCatalogsRequest)
+  }
+
+  // @@protoc_insertion_point(class_scope:google.cloud.retail.v2.ListCatalogsRequest)
+  private static final com.google.cloud.retail.v2.ListCatalogsRequest DEFAULT_INSTANCE;
+
+  static {
+    DEFAULT_INSTANCE = new com.google.cloud.retail.v2.ListCatalogsRequest();
+  }
+
+  public static com.google.cloud.retail.v2.ListCatalogsRequest getDefaultInstance() {
+    return DEFAULT_INSTANCE;
+  }
+
+  private static final com.google.protobuf.Parser<ListCatalogsRequest> PARSER =
+      new com.google.protobuf.AbstractParser<ListCatalogsRequest>() {
+        @java.lang.Override
+        public ListCatalogsRequest parsePartialFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws com.google.protobuf.InvalidProtocolBufferException {
+          return new ListCatalogsRequest(input, extensionRegistry);
+        }
+      };
+
+  public static com.google.protobuf.Parser<ListCatalogsRequest> parser() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.protobuf.Parser<ListCatalogsRequest> getParserForType() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.cloud.retail.v2.ListCatalogsRequest getDefaultInstanceForType() {
+    return DEFAULT_INSTANCE;
+  }
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ListCatalogsRequestOrBuilder.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ListCatalogsRequestOrBuilder.java
new file mode 100644
index 00000000..d114c027
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ListCatalogsRequestOrBuilder.java
@@ -0,0 +1,119 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/catalog_service.proto
+
+package com.google.cloud.retail.v2;
+
+public interface ListCatalogsRequestOrBuilder
+    extends
+    // @@protoc_insertion_point(interface_extends:google.cloud.retail.v2.ListCatalogsRequest)
+    com.google.protobuf.MessageOrBuilder {
+
+  /**
+   *
+   *
+   * <pre>
+   * Required. The account resource name with an associated location.
+   * If the caller does not have permission to list
+   * [Catalog][google.cloud.retail.v2.Catalog]s under this location, regardless
+   * of whether or not this location exists, a PERMISSION_DENIED error is
+   * returned.
+   * </pre>
+   *
+   * <code>
+   * string parent = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+   * </code>
+   *
+   * @return The parent.
+   */
+  java.lang.String getParent();
+  /**
+   *
+   *
+   * <pre>
+   * Required. The account resource name with an associated location.
+   * If the caller does not have permission to list
+   * [Catalog][google.cloud.retail.v2.Catalog]s under this location, regardless
+   * of whether or not this location exists, a PERMISSION_DENIED error is
+   * returned.
+   * </pre>
+   *
+   * <code>
+   * string parent = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+   * </code>
+   *
+   * @return The bytes for parent.
+   */
+  com.google.protobuf.ByteString getParentBytes();
+
+  /**
+   *
+   *
+   * <pre>
+   * Maximum number of [Catalog][google.cloud.retail.v2.Catalog]s to return. If
+   * unspecified, defaults to 50. The maximum allowed value is 1000. Values
+   * above 1000 will be coerced to 1000.
+   * If this field is negative, an INVALID_ARGUMENT is returned.
+   * </pre>
+   *
+   * <code>int32 page_size = 2;</code>
+   *
+   * @return The pageSize.
+   */
+  int getPageSize();
+
+  /**
+   *
+   *
+   * <pre>
+   * A page token
+   * [ListCatalogsResponse.next_page_token][google.cloud.retail.v2.ListCatalogsResponse.next_page_token],
+   * received from a previous
+   * [CatalogService.ListCatalogs][google.cloud.retail.v2.CatalogService.ListCatalogs]
+   * call. Provide this to retrieve the subsequent page.
+   * When paginating, all other parameters provided to
+   * [CatalogService.ListCatalogs][google.cloud.retail.v2.CatalogService.ListCatalogs]
+   * must match the call that provided the page token. Otherwise, an
+   * INVALID_ARGUMENT error is returned.
+   * </pre>
+   *
+   * <code>string page_token = 3;</code>
+   *
+   * @return The pageToken.
+   */
+  java.lang.String getPageToken();
+  /**
+   *
+   *
+   * <pre>
+   * A page token
+   * [ListCatalogsResponse.next_page_token][google.cloud.retail.v2.ListCatalogsResponse.next_page_token],
+   * received from a previous
+   * [CatalogService.ListCatalogs][google.cloud.retail.v2.CatalogService.ListCatalogs]
+   * call. Provide this to retrieve the subsequent page.
+   * When paginating, all other parameters provided to
+   * [CatalogService.ListCatalogs][google.cloud.retail.v2.CatalogService.ListCatalogs]
+   * must match the call that provided the page token. Otherwise, an
+   * INVALID_ARGUMENT error is returned.
+   * </pre>
+   *
+   * <code>string page_token = 3;</code>
+   *
+   * @return The bytes for pageToken.
+   */
+  com.google.protobuf.ByteString getPageTokenBytes();
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ListCatalogsResponse.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ListCatalogsResponse.java
new file mode 100644
index 00000000..cfdd0d48
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ListCatalogsResponse.java
@@ -0,0 +1,1151 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/catalog_service.proto
+
+package com.google.cloud.retail.v2;
+
+/**
+ *
+ *
+ * <pre>
+ * Response for
+ * [CatalogService.ListCatalogs][google.cloud.retail.v2.CatalogService.ListCatalogs]
+ * method.
+ * </pre>
+ *
+ * Protobuf type {@code google.cloud.retail.v2.ListCatalogsResponse}
+ */
+public final class ListCatalogsResponse extends com.google.protobuf.GeneratedMessageV3
+    implements
+    // @@protoc_insertion_point(message_implements:google.cloud.retail.v2.ListCatalogsResponse)
+    ListCatalogsResponseOrBuilder {
+  private static final long serialVersionUID = 0L;
+  // Use ListCatalogsResponse.newBuilder() to construct.
+  private ListCatalogsResponse(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+    super(builder);
+  }
+
+  private ListCatalogsResponse() {
+    catalogs_ = java.util.Collections.emptyList();
+    nextPageToken_ = "";
+  }
+
+  @java.lang.Override
+  @SuppressWarnings({"unused"})
+  protected java.lang.Object newInstance(UnusedPrivateParameter unused) {
+    return new ListCatalogsResponse();
+  }
+
+  @java.lang.Override
+  public final com.google.protobuf.UnknownFieldSet getUnknownFields() {
+    return this.unknownFields;
+  }
+
+  private ListCatalogsResponse(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    this();
+    if (extensionRegistry == null) {
+      throw new java.lang.NullPointerException();
+    }
+    int mutable_bitField0_ = 0;
+    com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+        com.google.protobuf.UnknownFieldSet.newBuilder();
+    try {
+      boolean done = false;
+      while (!done) {
+        int tag = input.readTag();
+        switch (tag) {
+          case 0:
+            done = true;
+            break;
+          case 10:
+            {
+              if (!((mutable_bitField0_ & 0x00000001) != 0)) {
+                catalogs_ = new java.util.ArrayList<com.google.cloud.retail.v2.Catalog>();
+                mutable_bitField0_ |= 0x00000001;
+              }
+              catalogs_.add(
+                  input.readMessage(
+                      com.google.cloud.retail.v2.Catalog.parser(), extensionRegistry));
+              break;
+            }
+          case 18:
+            {
+              java.lang.String s = input.readStringRequireUtf8();
+
+              nextPageToken_ = s;
+              break;
+            }
+          default:
+            {
+              if (!parseUnknownField(input, unknownFields, extensionRegistry, tag)) {
+                done = true;
+              }
+              break;
+            }
+        }
+      }
+    } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+      throw e.setUnfinishedMessage(this);
+    } catch (java.io.IOException e) {
+      throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
+    } finally {
+      if (((mutable_bitField0_ & 0x00000001) != 0)) {
+        catalogs_ = java.util.Collections.unmodifiableList(catalogs_);
+      }
+      this.unknownFields = unknownFields.build();
+      makeExtensionsImmutable();
+    }
+  }
+
+  public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+    return com.google.cloud.retail.v2.CatalogServiceProto
+        .internal_static_google_cloud_retail_v2_ListCatalogsResponse_descriptor;
+  }
+
+  @java.lang.Override
+  protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internalGetFieldAccessorTable() {
+    return com.google.cloud.retail.v2.CatalogServiceProto
+        .internal_static_google_cloud_retail_v2_ListCatalogsResponse_fieldAccessorTable
+        .ensureFieldAccessorsInitialized(
+            com.google.cloud.retail.v2.ListCatalogsResponse.class,
+            com.google.cloud.retail.v2.ListCatalogsResponse.Builder.class);
+  }
+
+  public static final int CATALOGS_FIELD_NUMBER = 1;
+  private java.util.List<com.google.cloud.retail.v2.Catalog> catalogs_;
+  /**
+   *
+   *
+   * <pre>
+   * All the customer's [Catalog][google.cloud.retail.v2.Catalog]s.
+   * </pre>
+   *
+   * <code>repeated .google.cloud.retail.v2.Catalog catalogs = 1;</code>
+   */
+  @java.lang.Override
+  public java.util.List<com.google.cloud.retail.v2.Catalog> getCatalogsList() {
+    return catalogs_;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * All the customer's [Catalog][google.cloud.retail.v2.Catalog]s.
+   * </pre>
+   *
+   * <code>repeated .google.cloud.retail.v2.Catalog catalogs = 1;</code>
+   */
+  @java.lang.Override
+  public java.util.List<? extends com.google.cloud.retail.v2.CatalogOrBuilder>
+      getCatalogsOrBuilderList() {
+    return catalogs_;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * All the customer's [Catalog][google.cloud.retail.v2.Catalog]s.
+   * </pre>
+   *
+   * <code>repeated .google.cloud.retail.v2.Catalog catalogs = 1;</code>
+   */
+  @java.lang.Override
+  public int getCatalogsCount() {
+    return catalogs_.size();
+  }
+  /**
+   *
+   *
+   * <pre>
+   * All the customer's [Catalog][google.cloud.retail.v2.Catalog]s.
+   * </pre>
+   *
+   * <code>repeated .google.cloud.retail.v2.Catalog catalogs = 1;</code>
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.Catalog getCatalogs(int index) {
+    return catalogs_.get(index);
+  }
+  /**
+   *
+   *
+   * <pre>
+   * All the customer's [Catalog][google.cloud.retail.v2.Catalog]s.
+   * </pre>
+   *
+   * <code>repeated .google.cloud.retail.v2.Catalog catalogs = 1;</code>
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.CatalogOrBuilder getCatalogsOrBuilder(int index) {
+    return catalogs_.get(index);
+  }
+
+  public static final int NEXT_PAGE_TOKEN_FIELD_NUMBER = 2;
+  private volatile java.lang.Object nextPageToken_;
+  /**
+   *
+   *
+   * <pre>
+   * A token that can be sent as
+   * [ListCatalogsRequest.page_token][google.cloud.retail.v2.ListCatalogsRequest.page_token]
+   * to retrieve the next page. If this field is omitted, there are no
+   * subsequent pages.
+   * </pre>
+   *
+   * <code>string next_page_token = 2;</code>
+   *
+   * @return The nextPageToken.
+   */
+  @java.lang.Override
+  public java.lang.String getNextPageToken() {
+    java.lang.Object ref = nextPageToken_;
+    if (ref instanceof java.lang.String) {
+      return (java.lang.String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+      java.lang.String s = bs.toStringUtf8();
+      nextPageToken_ = s;
+      return s;
+    }
+  }
+  /**
+   *
+   *
+   * <pre>
+   * A token that can be sent as
+   * [ListCatalogsRequest.page_token][google.cloud.retail.v2.ListCatalogsRequest.page_token]
+   * to retrieve the next page. If this field is omitted, there are no
+   * subsequent pages.
+   * </pre>
+   *
+   * <code>string next_page_token = 2;</code>
+   *
+   * @return The bytes for nextPageToken.
+   */
+  @java.lang.Override
+  public com.google.protobuf.ByteString getNextPageTokenBytes() {
+    java.lang.Object ref = nextPageToken_;
+    if (ref instanceof java.lang.String) {
+      com.google.protobuf.ByteString b =
+          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+      nextPageToken_ = b;
+      return b;
+    } else {
+      return (com.google.protobuf.ByteString) ref;
+    }
+  }
+
+  private byte memoizedIsInitialized = -1;
+
+  @java.lang.Override
+  public final boolean isInitialized() {
+    byte isInitialized = memoizedIsInitialized;
+    if (isInitialized == 1) return true;
+    if (isInitialized == 0) return false;
+
+    memoizedIsInitialized = 1;
+    return true;
+  }
+
+  @java.lang.Override
+  public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
+    for (int i = 0; i < catalogs_.size(); i++) {
+      output.writeMessage(1, catalogs_.get(i));
+    }
+    if (!getNextPageTokenBytes().isEmpty()) {
+      com.google.protobuf.GeneratedMessageV3.writeString(output, 2, nextPageToken_);
+    }
+    unknownFields.writeTo(output);
+  }
+
+  @java.lang.Override
+  public int getSerializedSize() {
+    int size = memoizedSize;
+    if (size != -1) return size;
+
+    size = 0;
+    for (int i = 0; i < catalogs_.size(); i++) {
+      size += com.google.protobuf.CodedOutputStream.computeMessageSize(1, catalogs_.get(i));
+    }
+    if (!getNextPageTokenBytes().isEmpty()) {
+      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(2, nextPageToken_);
+    }
+    size += unknownFields.getSerializedSize();
+    memoizedSize = size;
+    return size;
+  }
+
+  @java.lang.Override
+  public boolean equals(final java.lang.Object obj) {
+    if (obj == this) {
+      return true;
+    }
+    if (!(obj instanceof com.google.cloud.retail.v2.ListCatalogsResponse)) {
+      return super.equals(obj);
+    }
+    com.google.cloud.retail.v2.ListCatalogsResponse other =
+        (com.google.cloud.retail.v2.ListCatalogsResponse) obj;
+
+    if (!getCatalogsList().equals(other.getCatalogsList())) return false;
+    if (!getNextPageToken().equals(other.getNextPageToken())) return false;
+    if (!unknownFields.equals(other.unknownFields)) return false;
+    return true;
+  }
+
+  @java.lang.Override
+  public int hashCode() {
+    if (memoizedHashCode != 0) {
+      return memoizedHashCode;
+    }
+    int hash = 41;
+    hash = (19 * hash) + getDescriptor().hashCode();
+    if (getCatalogsCount() > 0) {
+      hash = (37 * hash) + CATALOGS_FIELD_NUMBER;
+      hash = (53 * hash) + getCatalogsList().hashCode();
+    }
+    hash = (37 * hash) + NEXT_PAGE_TOKEN_FIELD_NUMBER;
+    hash = (53 * hash) + getNextPageToken().hashCode();
+    hash = (29 * hash) + unknownFields.hashCode();
+    memoizedHashCode = hash;
+    return hash;
+  }
+
+  public static com.google.cloud.retail.v2.ListCatalogsResponse parseFrom(java.nio.ByteBuffer data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.ListCatalogsResponse parseFrom(
+      java.nio.ByteBuffer data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.ListCatalogsResponse parseFrom(
+      com.google.protobuf.ByteString data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.ListCatalogsResponse parseFrom(
+      com.google.protobuf.ByteString data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.ListCatalogsResponse parseFrom(byte[] data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.ListCatalogsResponse parseFrom(
+      byte[] data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.ListCatalogsResponse parseFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.ListCatalogsResponse parseFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.ListCatalogsResponse parseDelimitedFrom(
+      java.io.InputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.ListCatalogsResponse parseDelimitedFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.ListCatalogsResponse parseFrom(
+      com.google.protobuf.CodedInputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.ListCatalogsResponse parseFrom(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  @java.lang.Override
+  public Builder newBuilderForType() {
+    return newBuilder();
+  }
+
+  public static Builder newBuilder() {
+    return DEFAULT_INSTANCE.toBuilder();
+  }
+
+  public static Builder newBuilder(com.google.cloud.retail.v2.ListCatalogsResponse prototype) {
+    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+  }
+
+  @java.lang.Override
+  public Builder toBuilder() {
+    return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
+  }
+
+  @java.lang.Override
+  protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+    Builder builder = new Builder(parent);
+    return builder;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Response for
+   * [CatalogService.ListCatalogs][google.cloud.retail.v2.CatalogService.ListCatalogs]
+   * method.
+   * </pre>
+   *
+   * Protobuf type {@code google.cloud.retail.v2.ListCatalogsResponse}
+   */
+  public static final class Builder extends com.google.protobuf.GeneratedMessageV3.Builder<Builder>
+      implements
+      // @@protoc_insertion_point(builder_implements:google.cloud.retail.v2.ListCatalogsResponse)
+      com.google.cloud.retail.v2.ListCatalogsResponseOrBuilder {
+    public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+      return com.google.cloud.retail.v2.CatalogServiceProto
+          .internal_static_google_cloud_retail_v2_ListCatalogsResponse_descriptor;
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return com.google.cloud.retail.v2.CatalogServiceProto
+          .internal_static_google_cloud_retail_v2_ListCatalogsResponse_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              com.google.cloud.retail.v2.ListCatalogsResponse.class,
+              com.google.cloud.retail.v2.ListCatalogsResponse.Builder.class);
+    }
+
+    // Construct using com.google.cloud.retail.v2.ListCatalogsResponse.newBuilder()
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
+
+    private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+      super(parent);
+      maybeForceBuilderInitialization();
+    }
+
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders) {
+        getCatalogsFieldBuilder();
+      }
+    }
+
+    @java.lang.Override
+    public Builder clear() {
+      super.clear();
+      if (catalogsBuilder_ == null) {
+        catalogs_ = java.util.Collections.emptyList();
+        bitField0_ = (bitField0_ & ~0x00000001);
+      } else {
+        catalogsBuilder_.clear();
+      }
+      nextPageToken_ = "";
+
+      return this;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
+      return com.google.cloud.retail.v2.CatalogServiceProto
+          .internal_static_google_cloud_retail_v2_ListCatalogsResponse_descriptor;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.ListCatalogsResponse getDefaultInstanceForType() {
+      return com.google.cloud.retail.v2.ListCatalogsResponse.getDefaultInstance();
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.ListCatalogsResponse build() {
+      com.google.cloud.retail.v2.ListCatalogsResponse result = buildPartial();
+      if (!result.isInitialized()) {
+        throw newUninitializedMessageException(result);
+      }
+      return result;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.ListCatalogsResponse buildPartial() {
+      com.google.cloud.retail.v2.ListCatalogsResponse result =
+          new com.google.cloud.retail.v2.ListCatalogsResponse(this);
+      int from_bitField0_ = bitField0_;
+      if (catalogsBuilder_ == null) {
+        if (((bitField0_ & 0x00000001) != 0)) {
+          catalogs_ = java.util.Collections.unmodifiableList(catalogs_);
+          bitField0_ = (bitField0_ & ~0x00000001);
+        }
+        result.catalogs_ = catalogs_;
+      } else {
+        result.catalogs_ = catalogsBuilder_.build();
+      }
+      result.nextPageToken_ = nextPageToken_;
+      onBuilt();
+      return result;
+    }
+
+    @java.lang.Override
+    public Builder clone() {
+      return super.clone();
+    }
+
+    @java.lang.Override
+    public Builder setField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.setField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
+      return super.clearField(field);
+    }
+
+    @java.lang.Override
+    public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+      return super.clearOneof(oneof);
+    }
+
+    @java.lang.Override
+    public Builder setRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, int index, java.lang.Object value) {
+      return super.setRepeatedField(field, index, value);
+    }
+
+    @java.lang.Override
+    public Builder addRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.addRepeatedField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(com.google.protobuf.Message other) {
+      if (other instanceof com.google.cloud.retail.v2.ListCatalogsResponse) {
+        return mergeFrom((com.google.cloud.retail.v2.ListCatalogsResponse) other);
+      } else {
+        super.mergeFrom(other);
+        return this;
+      }
+    }
+
+    public Builder mergeFrom(com.google.cloud.retail.v2.ListCatalogsResponse other) {
+      if (other == com.google.cloud.retail.v2.ListCatalogsResponse.getDefaultInstance())
+        return this;
+      if (catalogsBuilder_ == null) {
+        if (!other.catalogs_.isEmpty()) {
+          if (catalogs_.isEmpty()) {
+            catalogs_ = other.catalogs_;
+            bitField0_ = (bitField0_ & ~0x00000001);
+          } else {
+            ensureCatalogsIsMutable();
+            catalogs_.addAll(other.catalogs_);
+          }
+          onChanged();
+        }
+      } else {
+        if (!other.catalogs_.isEmpty()) {
+          if (catalogsBuilder_.isEmpty()) {
+            catalogsBuilder_.dispose();
+            catalogsBuilder_ = null;
+            catalogs_ = other.catalogs_;
+            bitField0_ = (bitField0_ & ~0x00000001);
+            catalogsBuilder_ =
+                com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders
+                    ? getCatalogsFieldBuilder()
+                    : null;
+          } else {
+            catalogsBuilder_.addAllMessages(other.catalogs_);
+          }
+        }
+      }
+      if (!other.getNextPageToken().isEmpty()) {
+        nextPageToken_ = other.nextPageToken_;
+        onChanged();
+      }
+      this.mergeUnknownFields(other.unknownFields);
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final boolean isInitialized() {
+      return true;
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      com.google.cloud.retail.v2.ListCatalogsResponse parsedMessage = null;
+      try {
+        parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        parsedMessage = (com.google.cloud.retail.v2.ListCatalogsResponse) e.getUnfinishedMessage();
+        throw e.unwrapIOException();
+      } finally {
+        if (parsedMessage != null) {
+          mergeFrom(parsedMessage);
+        }
+      }
+      return this;
+    }
+
+    private int bitField0_;
+
+    private java.util.List<com.google.cloud.retail.v2.Catalog> catalogs_ =
+        java.util.Collections.emptyList();
+
+    private void ensureCatalogsIsMutable() {
+      if (!((bitField0_ & 0x00000001) != 0)) {
+        catalogs_ = new java.util.ArrayList<com.google.cloud.retail.v2.Catalog>(catalogs_);
+        bitField0_ |= 0x00000001;
+      }
+    }
+
+    private com.google.protobuf.RepeatedFieldBuilderV3<
+            com.google.cloud.retail.v2.Catalog,
+            com.google.cloud.retail.v2.Catalog.Builder,
+            com.google.cloud.retail.v2.CatalogOrBuilder>
+        catalogsBuilder_;
+
+    /**
+     *
+     *
+     * <pre>
+     * All the customer's [Catalog][google.cloud.retail.v2.Catalog]s.
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.Catalog catalogs = 1;</code>
+     */
+    public java.util.List<com.google.cloud.retail.v2.Catalog> getCatalogsList() {
+      if (catalogsBuilder_ == null) {
+        return java.util.Collections.unmodifiableList(catalogs_);
+      } else {
+        return catalogsBuilder_.getMessageList();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * All the customer's [Catalog][google.cloud.retail.v2.Catalog]s.
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.Catalog catalogs = 1;</code>
+     */
+    public int getCatalogsCount() {
+      if (catalogsBuilder_ == null) {
+        return catalogs_.size();
+      } else {
+        return catalogsBuilder_.getCount();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * All the customer's [Catalog][google.cloud.retail.v2.Catalog]s.
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.Catalog catalogs = 1;</code>
+     */
+    public com.google.cloud.retail.v2.Catalog getCatalogs(int index) {
+      if (catalogsBuilder_ == null) {
+        return catalogs_.get(index);
+      } else {
+        return catalogsBuilder_.getMessage(index);
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * All the customer's [Catalog][google.cloud.retail.v2.Catalog]s.
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.Catalog catalogs = 1;</code>
+     */
+    public Builder setCatalogs(int index, com.google.cloud.retail.v2.Catalog value) {
+      if (catalogsBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        ensureCatalogsIsMutable();
+        catalogs_.set(index, value);
+        onChanged();
+      } else {
+        catalogsBuilder_.setMessage(index, value);
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * All the customer's [Catalog][google.cloud.retail.v2.Catalog]s.
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.Catalog catalogs = 1;</code>
+     */
+    public Builder setCatalogs(
+        int index, com.google.cloud.retail.v2.Catalog.Builder builderForValue) {
+      if (catalogsBuilder_ == null) {
+        ensureCatalogsIsMutable();
+        catalogs_.set(index, builderForValue.build());
+        onChanged();
+      } else {
+        catalogsBuilder_.setMessage(index, builderForValue.build());
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * All the customer's [Catalog][google.cloud.retail.v2.Catalog]s.
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.Catalog catalogs = 1;</code>
+     */
+    public Builder addCatalogs(com.google.cloud.retail.v2.Catalog value) {
+      if (catalogsBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        ensureCatalogsIsMutable();
+        catalogs_.add(value);
+        onChanged();
+      } else {
+        catalogsBuilder_.addMessage(value);
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * All the customer's [Catalog][google.cloud.retail.v2.Catalog]s.
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.Catalog catalogs = 1;</code>
+     */
+    public Builder addCatalogs(int index, com.google.cloud.retail.v2.Catalog value) {
+      if (catalogsBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        ensureCatalogsIsMutable();
+        catalogs_.add(index, value);
+        onChanged();
+      } else {
+        catalogsBuilder_.addMessage(index, value);
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * All the customer's [Catalog][google.cloud.retail.v2.Catalog]s.
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.Catalog catalogs = 1;</code>
+     */
+    public Builder addCatalogs(com.google.cloud.retail.v2.Catalog.Builder builderForValue) {
+      if (catalogsBuilder_ == null) {
+        ensureCatalogsIsMutable();
+        catalogs_.add(builderForValue.build());
+        onChanged();
+      } else {
+        catalogsBuilder_.addMessage(builderForValue.build());
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * All the customer's [Catalog][google.cloud.retail.v2.Catalog]s.
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.Catalog catalogs = 1;</code>
+     */
+    public Builder addCatalogs(
+        int index, com.google.cloud.retail.v2.Catalog.Builder builderForValue) {
+      if (catalogsBuilder_ == null) {
+        ensureCatalogsIsMutable();
+        catalogs_.add(index, builderForValue.build());
+        onChanged();
+      } else {
+        catalogsBuilder_.addMessage(index, builderForValue.build());
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * All the customer's [Catalog][google.cloud.retail.v2.Catalog]s.
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.Catalog catalogs = 1;</code>
+     */
+    public Builder addAllCatalogs(
+        java.lang.Iterable<? extends com.google.cloud.retail.v2.Catalog> values) {
+      if (catalogsBuilder_ == null) {
+        ensureCatalogsIsMutable();
+        com.google.protobuf.AbstractMessageLite.Builder.addAll(values, catalogs_);
+        onChanged();
+      } else {
+        catalogsBuilder_.addAllMessages(values);
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * All the customer's [Catalog][google.cloud.retail.v2.Catalog]s.
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.Catalog catalogs = 1;</code>
+     */
+    public Builder clearCatalogs() {
+      if (catalogsBuilder_ == null) {
+        catalogs_ = java.util.Collections.emptyList();
+        bitField0_ = (bitField0_ & ~0x00000001);
+        onChanged();
+      } else {
+        catalogsBuilder_.clear();
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * All the customer's [Catalog][google.cloud.retail.v2.Catalog]s.
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.Catalog catalogs = 1;</code>
+     */
+    public Builder removeCatalogs(int index) {
+      if (catalogsBuilder_ == null) {
+        ensureCatalogsIsMutable();
+        catalogs_.remove(index);
+        onChanged();
+      } else {
+        catalogsBuilder_.remove(index);
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * All the customer's [Catalog][google.cloud.retail.v2.Catalog]s.
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.Catalog catalogs = 1;</code>
+     */
+    public com.google.cloud.retail.v2.Catalog.Builder getCatalogsBuilder(int index) {
+      return getCatalogsFieldBuilder().getBuilder(index);
+    }
+    /**
+     *
+     *
+     * <pre>
+     * All the customer's [Catalog][google.cloud.retail.v2.Catalog]s.
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.Catalog catalogs = 1;</code>
+     */
+    public com.google.cloud.retail.v2.CatalogOrBuilder getCatalogsOrBuilder(int index) {
+      if (catalogsBuilder_ == null) {
+        return catalogs_.get(index);
+      } else {
+        return catalogsBuilder_.getMessageOrBuilder(index);
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * All the customer's [Catalog][google.cloud.retail.v2.Catalog]s.
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.Catalog catalogs = 1;</code>
+     */
+    public java.util.List<? extends com.google.cloud.retail.v2.CatalogOrBuilder>
+        getCatalogsOrBuilderList() {
+      if (catalogsBuilder_ != null) {
+        return catalogsBuilder_.getMessageOrBuilderList();
+      } else {
+        return java.util.Collections.unmodifiableList(catalogs_);
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * All the customer's [Catalog][google.cloud.retail.v2.Catalog]s.
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.Catalog catalogs = 1;</code>
+     */
+    public com.google.cloud.retail.v2.Catalog.Builder addCatalogsBuilder() {
+      return getCatalogsFieldBuilder()
+          .addBuilder(com.google.cloud.retail.v2.Catalog.getDefaultInstance());
+    }
+    /**
+     *
+     *
+     * <pre>
+     * All the customer's [Catalog][google.cloud.retail.v2.Catalog]s.
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.Catalog catalogs = 1;</code>
+     */
+    public com.google.cloud.retail.v2.Catalog.Builder addCatalogsBuilder(int index) {
+      return getCatalogsFieldBuilder()
+          .addBuilder(index, com.google.cloud.retail.v2.Catalog.getDefaultInstance());
+    }
+    /**
+     *
+     *
+     * <pre>
+     * All the customer's [Catalog][google.cloud.retail.v2.Catalog]s.
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.Catalog catalogs = 1;</code>
+     */
+    public java.util.List<com.google.cloud.retail.v2.Catalog.Builder> getCatalogsBuilderList() {
+      return getCatalogsFieldBuilder().getBuilderList();
+    }
+
+    private com.google.protobuf.RepeatedFieldBuilderV3<
+            com.google.cloud.retail.v2.Catalog,
+            com.google.cloud.retail.v2.Catalog.Builder,
+            com.google.cloud.retail.v2.CatalogOrBuilder>
+        getCatalogsFieldBuilder() {
+      if (catalogsBuilder_ == null) {
+        catalogsBuilder_ =
+            new com.google.protobuf.RepeatedFieldBuilderV3<
+                com.google.cloud.retail.v2.Catalog,
+                com.google.cloud.retail.v2.Catalog.Builder,
+                com.google.cloud.retail.v2.CatalogOrBuilder>(
+                catalogs_, ((bitField0_ & 0x00000001) != 0), getParentForChildren(), isClean());
+        catalogs_ = null;
+      }
+      return catalogsBuilder_;
+    }
+
+    private java.lang.Object nextPageToken_ = "";
+    /**
+     *
+     *
+     * <pre>
+     * A token that can be sent as
+     * [ListCatalogsRequest.page_token][google.cloud.retail.v2.ListCatalogsRequest.page_token]
+     * to retrieve the next page. If this field is omitted, there are no
+     * subsequent pages.
+     * </pre>
+     *
+     * <code>string next_page_token = 2;</code>
+     *
+     * @return The nextPageToken.
+     */
+    public java.lang.String getNextPageToken() {
+      java.lang.Object ref = nextPageToken_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        nextPageToken_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A token that can be sent as
+     * [ListCatalogsRequest.page_token][google.cloud.retail.v2.ListCatalogsRequest.page_token]
+     * to retrieve the next page. If this field is omitted, there are no
+     * subsequent pages.
+     * </pre>
+     *
+     * <code>string next_page_token = 2;</code>
+     *
+     * @return The bytes for nextPageToken.
+     */
+    public com.google.protobuf.ByteString getNextPageTokenBytes() {
+      java.lang.Object ref = nextPageToken_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b =
+            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+        nextPageToken_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A token that can be sent as
+     * [ListCatalogsRequest.page_token][google.cloud.retail.v2.ListCatalogsRequest.page_token]
+     * to retrieve the next page. If this field is omitted, there are no
+     * subsequent pages.
+     * </pre>
+     *
+     * <code>string next_page_token = 2;</code>
+     *
+     * @param value The nextPageToken to set.
+     * @return This builder for chaining.
+     */
+    public Builder setNextPageToken(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+
+      nextPageToken_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A token that can be sent as
+     * [ListCatalogsRequest.page_token][google.cloud.retail.v2.ListCatalogsRequest.page_token]
+     * to retrieve the next page. If this field is omitted, there are no
+     * subsequent pages.
+     * </pre>
+     *
+     * <code>string next_page_token = 2;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearNextPageToken() {
+
+      nextPageToken_ = getDefaultInstance().getNextPageToken();
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A token that can be sent as
+     * [ListCatalogsRequest.page_token][google.cloud.retail.v2.ListCatalogsRequest.page_token]
+     * to retrieve the next page. If this field is omitted, there are no
+     * subsequent pages.
+     * </pre>
+     *
+     * <code>string next_page_token = 2;</code>
+     *
+     * @param value The bytes for nextPageToken to set.
+     * @return This builder for chaining.
+     */
+    public Builder setNextPageTokenBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+
+      nextPageToken_ = value;
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.setUnknownFields(unknownFields);
+    }
+
+    @java.lang.Override
+    public final Builder mergeUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.mergeUnknownFields(unknownFields);
+    }
+
+    // @@protoc_insertion_point(builder_scope:google.cloud.retail.v2.ListCatalogsResponse)
+  }
+
+  // @@protoc_insertion_point(class_scope:google.cloud.retail.v2.ListCatalogsResponse)
+  private static final com.google.cloud.retail.v2.ListCatalogsResponse DEFAULT_INSTANCE;
+
+  static {
+    DEFAULT_INSTANCE = new com.google.cloud.retail.v2.ListCatalogsResponse();
+  }
+
+  public static com.google.cloud.retail.v2.ListCatalogsResponse getDefaultInstance() {
+    return DEFAULT_INSTANCE;
+  }
+
+  private static final com.google.protobuf.Parser<ListCatalogsResponse> PARSER =
+      new com.google.protobuf.AbstractParser<ListCatalogsResponse>() {
+        @java.lang.Override
+        public ListCatalogsResponse parsePartialFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws com.google.protobuf.InvalidProtocolBufferException {
+          return new ListCatalogsResponse(input, extensionRegistry);
+        }
+      };
+
+  public static com.google.protobuf.Parser<ListCatalogsResponse> parser() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.protobuf.Parser<ListCatalogsResponse> getParserForType() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.cloud.retail.v2.ListCatalogsResponse getDefaultInstanceForType() {
+    return DEFAULT_INSTANCE;
+  }
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ListCatalogsResponseOrBuilder.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ListCatalogsResponseOrBuilder.java
new file mode 100644
index 00000000..29f4a44d
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ListCatalogsResponseOrBuilder.java
@@ -0,0 +1,107 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/catalog_service.proto
+
+package com.google.cloud.retail.v2;
+
+public interface ListCatalogsResponseOrBuilder
+    extends
+    // @@protoc_insertion_point(interface_extends:google.cloud.retail.v2.ListCatalogsResponse)
+    com.google.protobuf.MessageOrBuilder {
+
+  /**
+   *
+   *
+   * <pre>
+   * All the customer's [Catalog][google.cloud.retail.v2.Catalog]s.
+   * </pre>
+   *
+   * <code>repeated .google.cloud.retail.v2.Catalog catalogs = 1;</code>
+   */
+  java.util.List<com.google.cloud.retail.v2.Catalog> getCatalogsList();
+  /**
+   *
+   *
+   * <pre>
+   * All the customer's [Catalog][google.cloud.retail.v2.Catalog]s.
+   * </pre>
+   *
+   * <code>repeated .google.cloud.retail.v2.Catalog catalogs = 1;</code>
+   */
+  com.google.cloud.retail.v2.Catalog getCatalogs(int index);
+  /**
+   *
+   *
+   * <pre>
+   * All the customer's [Catalog][google.cloud.retail.v2.Catalog]s.
+   * </pre>
+   *
+   * <code>repeated .google.cloud.retail.v2.Catalog catalogs = 1;</code>
+   */
+  int getCatalogsCount();
+  /**
+   *
+   *
+   * <pre>
+   * All the customer's [Catalog][google.cloud.retail.v2.Catalog]s.
+   * </pre>
+   *
+   * <code>repeated .google.cloud.retail.v2.Catalog catalogs = 1;</code>
+   */
+  java.util.List<? extends com.google.cloud.retail.v2.CatalogOrBuilder> getCatalogsOrBuilderList();
+  /**
+   *
+   *
+   * <pre>
+   * All the customer's [Catalog][google.cloud.retail.v2.Catalog]s.
+   * </pre>
+   *
+   * <code>repeated .google.cloud.retail.v2.Catalog catalogs = 1;</code>
+   */
+  com.google.cloud.retail.v2.CatalogOrBuilder getCatalogsOrBuilder(int index);
+
+  /**
+   *
+   *
+   * <pre>
+   * A token that can be sent as
+   * [ListCatalogsRequest.page_token][google.cloud.retail.v2.ListCatalogsRequest.page_token]
+   * to retrieve the next page. If this field is omitted, there are no
+   * subsequent pages.
+   * </pre>
+   *
+   * <code>string next_page_token = 2;</code>
+   *
+   * @return The nextPageToken.
+   */
+  java.lang.String getNextPageToken();
+  /**
+   *
+   *
+   * <pre>
+   * A token that can be sent as
+   * [ListCatalogsRequest.page_token][google.cloud.retail.v2.ListCatalogsRequest.page_token]
+   * to retrieve the next page. If this field is omitted, there are no
+   * subsequent pages.
+   * </pre>
+   *
+   * <code>string next_page_token = 2;</code>
+   *
+   * @return The bytes for nextPageToken.
+   */
+  com.google.protobuf.ByteString getNextPageTokenBytes();
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/LocationName.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/LocationName.java
new file mode 100644
index 00000000..8ab5bb0a
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/LocationName.java
@@ -0,0 +1,192 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.cloud.retail.v2;
+
+import com.google.api.pathtemplate.PathTemplate;
+import com.google.api.resourcenames.ResourceName;
+import com.google.common.base.Preconditions;
+import com.google.common.collect.ImmutableMap;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import javax.annotation.Generated;
+
+// AUTO-GENERATED DOCUMENTATION AND CLASS.
+@Generated("by gapic-generator-java")
+public class LocationName implements ResourceName {
+  private static final PathTemplate PROJECT_LOCATION =
+      PathTemplate.createWithoutUrlEncoding("projects/{project}/locations/{location}");
+  private volatile Map<String, String> fieldValuesMap;
+  private final String project;
+  private final String location;
+
+  @Deprecated
+  protected LocationName() {
+    project = null;
+    location = null;
+  }
+
+  private LocationName(Builder builder) {
+    project = Preconditions.checkNotNull(builder.getProject());
+    location = Preconditions.checkNotNull(builder.getLocation());
+  }
+
+  public String getProject() {
+    return project;
+  }
+
+  public String getLocation() {
+    return location;
+  }
+
+  public static Builder newBuilder() {
+    return new Builder();
+  }
+
+  public Builder toBuilder() {
+    return new Builder(this);
+  }
+
+  public static LocationName of(String project, String location) {
+    return newBuilder().setProject(project).setLocation(location).build();
+  }
+
+  public static String format(String project, String location) {
+    return newBuilder().setProject(project).setLocation(location).build().toString();
+  }
+
+  public static LocationName parse(String formattedString) {
+    if (formattedString.isEmpty()) {
+      return null;
+    }
+    Map<String, String> matchMap =
+        PROJECT_LOCATION.validatedMatch(
+            formattedString, "LocationName.parse: formattedString not in valid format");
+    return of(matchMap.get("project"), matchMap.get("location"));
+  }
+
+  public static List<LocationName> parseList(List<String> formattedStrings) {
+    List<LocationName> list = new ArrayList<>(formattedStrings.size());
+    for (String formattedString : formattedStrings) {
+      list.add(parse(formattedString));
+    }
+    return list;
+  }
+
+  public static List<String> toStringList(List<LocationName> values) {
+    List<String> list = new ArrayList<>(values.size());
+    for (LocationName value : values) {
+      if (value == null) {
+        list.add("");
+      } else {
+        list.add(value.toString());
+      }
+    }
+    return list;
+  }
+
+  public static boolean isParsableFrom(String formattedString) {
+    return PROJECT_LOCATION.matches(formattedString);
+  }
+
+  @Override
+  public Map<String, String> getFieldValuesMap() {
+    if (fieldValuesMap == null) {
+      synchronized (this) {
+        if (fieldValuesMap == null) {
+          ImmutableMap.Builder<String, String> fieldMapBuilder = ImmutableMap.builder();
+          if (project != null) {
+            fieldMapBuilder.put("project", project);
+          }
+          if (location != null) {
+            fieldMapBuilder.put("location", location);
+          }
+          fieldValuesMap = fieldMapBuilder.build();
+        }
+      }
+    }
+    return fieldValuesMap;
+  }
+
+  public String getFieldValue(String fieldName) {
+    return getFieldValuesMap().get(fieldName);
+  }
+
+  @Override
+  public String toString() {
+    return PROJECT_LOCATION.instantiate("project", project, "location", location);
+  }
+
+  @Override
+  public boolean equals(Object o) {
+    if (o == this) {
+      return true;
+    }
+    if (o != null || getClass() == o.getClass()) {
+      LocationName that = ((LocationName) o);
+      return Objects.equals(this.project, that.project)
+          && Objects.equals(this.location, that.location);
+    }
+    return false;
+  }
+
+  @Override
+  public int hashCode() {
+    int h = 1;
+    h *= 1000003;
+    h ^= Objects.hashCode(project);
+    h *= 1000003;
+    h ^= Objects.hashCode(location);
+    return h;
+  }
+
+  /** Builder for projects/{project}/locations/{location}. */
+  public static class Builder {
+    private String project;
+    private String location;
+
+    protected Builder() {}
+
+    public String getProject() {
+      return project;
+    }
+
+    public String getLocation() {
+      return location;
+    }
+
+    public Builder setProject(String project) {
+      this.project = project;
+      return this;
+    }
+
+    public Builder setLocation(String location) {
+      this.location = location;
+      return this;
+    }
+
+    private Builder(LocationName locationName) {
+      project = locationName.project;
+      location = locationName.location;
+    }
+
+    public LocationName build() {
+      return new LocationName(this);
+    }
+  }
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/PredictRequest.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/PredictRequest.java
new file mode 100644
index 00000000..3160883f
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/PredictRequest.java
@@ -0,0 +1,2628 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/prediction_service.proto
+
+package com.google.cloud.retail.v2;
+
+/**
+ *
+ *
+ * <pre>
+ * Request message for Predict method.
+ * </pre>
+ *
+ * Protobuf type {@code google.cloud.retail.v2.PredictRequest}
+ */
+public final class PredictRequest extends com.google.protobuf.GeneratedMessageV3
+    implements
+    // @@protoc_insertion_point(message_implements:google.cloud.retail.v2.PredictRequest)
+    PredictRequestOrBuilder {
+  private static final long serialVersionUID = 0L;
+  // Use PredictRequest.newBuilder() to construct.
+  private PredictRequest(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+    super(builder);
+  }
+
+  private PredictRequest() {
+    placement_ = "";
+    pageToken_ = "";
+    filter_ = "";
+  }
+
+  @java.lang.Override
+  @SuppressWarnings({"unused"})
+  protected java.lang.Object newInstance(UnusedPrivateParameter unused) {
+    return new PredictRequest();
+  }
+
+  @java.lang.Override
+  public final com.google.protobuf.UnknownFieldSet getUnknownFields() {
+    return this.unknownFields;
+  }
+
+  private PredictRequest(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    this();
+    if (extensionRegistry == null) {
+      throw new java.lang.NullPointerException();
+    }
+    int mutable_bitField0_ = 0;
+    com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+        com.google.protobuf.UnknownFieldSet.newBuilder();
+    try {
+      boolean done = false;
+      while (!done) {
+        int tag = input.readTag();
+        switch (tag) {
+          case 0:
+            done = true;
+            break;
+          case 10:
+            {
+              java.lang.String s = input.readStringRequireUtf8();
+
+              placement_ = s;
+              break;
+            }
+          case 18:
+            {
+              com.google.cloud.retail.v2.UserEvent.Builder subBuilder = null;
+              if (userEvent_ != null) {
+                subBuilder = userEvent_.toBuilder();
+              }
+              userEvent_ =
+                  input.readMessage(
+                      com.google.cloud.retail.v2.UserEvent.parser(), extensionRegistry);
+              if (subBuilder != null) {
+                subBuilder.mergeFrom(userEvent_);
+                userEvent_ = subBuilder.buildPartial();
+              }
+
+              break;
+            }
+          case 24:
+            {
+              pageSize_ = input.readInt32();
+              break;
+            }
+          case 34:
+            {
+              java.lang.String s = input.readStringRequireUtf8();
+
+              pageToken_ = s;
+              break;
+            }
+          case 42:
+            {
+              java.lang.String s = input.readStringRequireUtf8();
+
+              filter_ = s;
+              break;
+            }
+          case 48:
+            {
+              validateOnly_ = input.readBool();
+              break;
+            }
+          case 58:
+            {
+              if (!((mutable_bitField0_ & 0x00000001) != 0)) {
+                params_ =
+                    com.google.protobuf.MapField.newMapField(ParamsDefaultEntryHolder.defaultEntry);
+                mutable_bitField0_ |= 0x00000001;
+              }
+              com.google.protobuf.MapEntry<java.lang.String, com.google.protobuf.Value> params__ =
+                  input.readMessage(
+                      ParamsDefaultEntryHolder.defaultEntry.getParserForType(), extensionRegistry);
+              params_.getMutableMap().put(params__.getKey(), params__.getValue());
+              break;
+            }
+          case 66:
+            {
+              if (!((mutable_bitField0_ & 0x00000002) != 0)) {
+                labels_ =
+                    com.google.protobuf.MapField.newMapField(LabelsDefaultEntryHolder.defaultEntry);
+                mutable_bitField0_ |= 0x00000002;
+              }
+              com.google.protobuf.MapEntry<java.lang.String, java.lang.String> labels__ =
+                  input.readMessage(
+                      LabelsDefaultEntryHolder.defaultEntry.getParserForType(), extensionRegistry);
+              labels_.getMutableMap().put(labels__.getKey(), labels__.getValue());
+              break;
+            }
+          default:
+            {
+              if (!parseUnknownField(input, unknownFields, extensionRegistry, tag)) {
+                done = true;
+              }
+              break;
+            }
+        }
+      }
+    } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+      throw e.setUnfinishedMessage(this);
+    } catch (java.io.IOException e) {
+      throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
+    } finally {
+      this.unknownFields = unknownFields.build();
+      makeExtensionsImmutable();
+    }
+  }
+
+  public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+    return com.google.cloud.retail.v2.PredictionServiceProto
+        .internal_static_google_cloud_retail_v2_PredictRequest_descriptor;
+  }
+
+  @SuppressWarnings({"rawtypes"})
+  @java.lang.Override
+  protected com.google.protobuf.MapField internalGetMapField(int number) {
+    switch (number) {
+      case 7:
+        return internalGetParams();
+      case 8:
+        return internalGetLabels();
+      default:
+        throw new RuntimeException("Invalid map field number: " + number);
+    }
+  }
+
+  @java.lang.Override
+  protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internalGetFieldAccessorTable() {
+    return com.google.cloud.retail.v2.PredictionServiceProto
+        .internal_static_google_cloud_retail_v2_PredictRequest_fieldAccessorTable
+        .ensureFieldAccessorsInitialized(
+            com.google.cloud.retail.v2.PredictRequest.class,
+            com.google.cloud.retail.v2.PredictRequest.Builder.class);
+  }
+
+  public static final int PLACEMENT_FIELD_NUMBER = 1;
+  private volatile java.lang.Object placement_;
+  /**
+   *
+   *
+   * <pre>
+   * Required. Full resource name of the format:
+   * {name=projects/&#42;&#47;locations/global/catalogs/default_catalog/placements/&#42;}
+   * The id of the recommendation engine placement. This id is used to identify
+   * the set of models that will be used to make the prediction.
+   * We currently support three placements with the following IDs by default:
+   * * `shopping_cart`: Predicts products frequently bought together with one or
+   *   more  products in the same shopping session. Commonly displayed after
+   *   `add-to-cart` events, on product detail pages, or on the shopping cart
+   *   page.
+   * * `home_page`: Predicts the next product that a user will most likely
+   *   engage with or purchase based on the shopping or viewing history of the
+   *   specified `userId` or `visitorId`. For example - Recommendations for you.
+   * * `product_detail`: Predicts the next product that a user will most likely
+   *   engage with or purchase. The prediction is based on the shopping or
+   *   viewing history of the specified `userId` or `visitorId` and its
+   *   relevance to a specified `CatalogItem`. Typically used on product detail
+   *   pages. For example - More products like this.
+   * * `recently_viewed_default`: Returns up to 75 products recently viewed by
+   *   the specified `userId` or `visitorId`, most recent ones first. Returns
+   *   nothing if neither of them has viewed any products yet. For example -
+   *   Recently viewed.
+   * The full list of available placements can be seen at
+   * https://console.cloud.google.com/recommendation/catalogs/default_catalog/placements
+   * </pre>
+   *
+   * <code>string placement = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The placement.
+   */
+  @java.lang.Override
+  public java.lang.String getPlacement() {
+    java.lang.Object ref = placement_;
+    if (ref instanceof java.lang.String) {
+      return (java.lang.String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+      java.lang.String s = bs.toStringUtf8();
+      placement_ = s;
+      return s;
+    }
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Required. Full resource name of the format:
+   * {name=projects/&#42;&#47;locations/global/catalogs/default_catalog/placements/&#42;}
+   * The id of the recommendation engine placement. This id is used to identify
+   * the set of models that will be used to make the prediction.
+   * We currently support three placements with the following IDs by default:
+   * * `shopping_cart`: Predicts products frequently bought together with one or
+   *   more  products in the same shopping session. Commonly displayed after
+   *   `add-to-cart` events, on product detail pages, or on the shopping cart
+   *   page.
+   * * `home_page`: Predicts the next product that a user will most likely
+   *   engage with or purchase based on the shopping or viewing history of the
+   *   specified `userId` or `visitorId`. For example - Recommendations for you.
+   * * `product_detail`: Predicts the next product that a user will most likely
+   *   engage with or purchase. The prediction is based on the shopping or
+   *   viewing history of the specified `userId` or `visitorId` and its
+   *   relevance to a specified `CatalogItem`. Typically used on product detail
+   *   pages. For example - More products like this.
+   * * `recently_viewed_default`: Returns up to 75 products recently viewed by
+   *   the specified `userId` or `visitorId`, most recent ones first. Returns
+   *   nothing if neither of them has viewed any products yet. For example -
+   *   Recently viewed.
+   * The full list of available placements can be seen at
+   * https://console.cloud.google.com/recommendation/catalogs/default_catalog/placements
+   * </pre>
+   *
+   * <code>string placement = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The bytes for placement.
+   */
+  @java.lang.Override
+  public com.google.protobuf.ByteString getPlacementBytes() {
+    java.lang.Object ref = placement_;
+    if (ref instanceof java.lang.String) {
+      com.google.protobuf.ByteString b =
+          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+      placement_ = b;
+      return b;
+    } else {
+      return (com.google.protobuf.ByteString) ref;
+    }
+  }
+
+  public static final int USER_EVENT_FIELD_NUMBER = 2;
+  private com.google.cloud.retail.v2.UserEvent userEvent_;
+  /**
+   *
+   *
+   * <pre>
+   * Required. Context about the user, what they are looking at and what action
+   * they took to trigger the predict request. Note that this user event detail
+   * won't be ingested to userEvent logs. Thus, a separate userEvent write
+   * request is required for event logging.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.retail.v2.UserEvent user_event = 2 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   *
+   * @return Whether the userEvent field is set.
+   */
+  @java.lang.Override
+  public boolean hasUserEvent() {
+    return userEvent_ != null;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Required. Context about the user, what they are looking at and what action
+   * they took to trigger the predict request. Note that this user event detail
+   * won't be ingested to userEvent logs. Thus, a separate userEvent write
+   * request is required for event logging.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.retail.v2.UserEvent user_event = 2 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   *
+   * @return The userEvent.
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.UserEvent getUserEvent() {
+    return userEvent_ == null
+        ? com.google.cloud.retail.v2.UserEvent.getDefaultInstance()
+        : userEvent_;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Required. Context about the user, what they are looking at and what action
+   * they took to trigger the predict request. Note that this user event detail
+   * won't be ingested to userEvent logs. Thus, a separate userEvent write
+   * request is required for event logging.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.retail.v2.UserEvent user_event = 2 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.UserEventOrBuilder getUserEventOrBuilder() {
+    return getUserEvent();
+  }
+
+  public static final int PAGE_SIZE_FIELD_NUMBER = 3;
+  private int pageSize_;
+  /**
+   *
+   *
+   * <pre>
+   * Maximum number of results to return per page. Set this property
+   * to the number of prediction results needed. If zero, the service will
+   * choose a reasonable default. The maximum allowed value is 100. Values
+   * above 100 will be coerced to 100.
+   * </pre>
+   *
+   * <code>int32 page_size = 3;</code>
+   *
+   * @return The pageSize.
+   */
+  @java.lang.Override
+  public int getPageSize() {
+    return pageSize_;
+  }
+
+  public static final int PAGE_TOKEN_FIELD_NUMBER = 4;
+  private volatile java.lang.Object pageToken_;
+  /**
+   *
+   *
+   * <pre>
+   * The previous PredictResponse.next_page_token.
+   * </pre>
+   *
+   * <code>string page_token = 4;</code>
+   *
+   * @return The pageToken.
+   */
+  @java.lang.Override
+  public java.lang.String getPageToken() {
+    java.lang.Object ref = pageToken_;
+    if (ref instanceof java.lang.String) {
+      return (java.lang.String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+      java.lang.String s = bs.toStringUtf8();
+      pageToken_ = s;
+      return s;
+    }
+  }
+  /**
+   *
+   *
+   * <pre>
+   * The previous PredictResponse.next_page_token.
+   * </pre>
+   *
+   * <code>string page_token = 4;</code>
+   *
+   * @return The bytes for pageToken.
+   */
+  @java.lang.Override
+  public com.google.protobuf.ByteString getPageTokenBytes() {
+    java.lang.Object ref = pageToken_;
+    if (ref instanceof java.lang.String) {
+      com.google.protobuf.ByteString b =
+          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+      pageToken_ = b;
+      return b;
+    } else {
+      return (com.google.protobuf.ByteString) ref;
+    }
+  }
+
+  public static final int FILTER_FIELD_NUMBER = 5;
+  private volatile java.lang.Object filter_;
+  /**
+   *
+   *
+   * <pre>
+   * Filter for restricting prediction results with a length limit of 5,000
+   * characters. Accepts values for tags and the `filterOutOfStockItems` flag.
+   *  * Tag expressions. Restricts predictions to products that match all of the
+   *    specified tags. Boolean operators `OR` and `NOT` are supported if the
+   *    expression is enclosed in parentheses, and must be separated from the
+   *    tag values by a space. `-"tagA"` is also supported and is equivalent to
+   *    `NOT "tagA"`. Tag values must be double quoted UTF-8 encoded strings
+   *    with a size limit of 1,000 characters.
+   *  * filterOutOfStockItems. Restricts predictions to products that do not
+   *  have a
+   *    stockState value of OUT_OF_STOCK.
+   * Examples:
+   *  * tag=("Red" OR "Blue") tag="New-Arrival" tag=(NOT "promotional")
+   *  * filterOutOfStockItems  tag=(-"promotional")
+   *  * filterOutOfStockItems
+   * If your filter blocks all prediction results, nothing will be returned. If
+   * you want generic (unfiltered) popular products to be returned instead, set
+   * `strictFiltering` to false in `PredictRequest.params`.
+   * </pre>
+   *
+   * <code>string filter = 5;</code>
+   *
+   * @return The filter.
+   */
+  @java.lang.Override
+  public java.lang.String getFilter() {
+    java.lang.Object ref = filter_;
+    if (ref instanceof java.lang.String) {
+      return (java.lang.String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+      java.lang.String s = bs.toStringUtf8();
+      filter_ = s;
+      return s;
+    }
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Filter for restricting prediction results with a length limit of 5,000
+   * characters. Accepts values for tags and the `filterOutOfStockItems` flag.
+   *  * Tag expressions. Restricts predictions to products that match all of the
+   *    specified tags. Boolean operators `OR` and `NOT` are supported if the
+   *    expression is enclosed in parentheses, and must be separated from the
+   *    tag values by a space. `-"tagA"` is also supported and is equivalent to
+   *    `NOT "tagA"`. Tag values must be double quoted UTF-8 encoded strings
+   *    with a size limit of 1,000 characters.
+   *  * filterOutOfStockItems. Restricts predictions to products that do not
+   *  have a
+   *    stockState value of OUT_OF_STOCK.
+   * Examples:
+   *  * tag=("Red" OR "Blue") tag="New-Arrival" tag=(NOT "promotional")
+   *  * filterOutOfStockItems  tag=(-"promotional")
+   *  * filterOutOfStockItems
+   * If your filter blocks all prediction results, nothing will be returned. If
+   * you want generic (unfiltered) popular products to be returned instead, set
+   * `strictFiltering` to false in `PredictRequest.params`.
+   * </pre>
+   *
+   * <code>string filter = 5;</code>
+   *
+   * @return The bytes for filter.
+   */
+  @java.lang.Override
+  public com.google.protobuf.ByteString getFilterBytes() {
+    java.lang.Object ref = filter_;
+    if (ref instanceof java.lang.String) {
+      com.google.protobuf.ByteString b =
+          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+      filter_ = b;
+      return b;
+    } else {
+      return (com.google.protobuf.ByteString) ref;
+    }
+  }
+
+  public static final int VALIDATE_ONLY_FIELD_NUMBER = 6;
+  private boolean validateOnly_;
+  /**
+   *
+   *
+   * <pre>
+   * Use validate only mode for this prediction query. If set to true, a
+   * dummy model will be used that returns arbitrary products.
+   * Note that the validate only mode should only be used for testing the API,
+   * or if the model is not ready.
+   * </pre>
+   *
+   * <code>bool validate_only = 6;</code>
+   *
+   * @return The validateOnly.
+   */
+  @java.lang.Override
+  public boolean getValidateOnly() {
+    return validateOnly_;
+  }
+
+  public static final int PARAMS_FIELD_NUMBER = 7;
+
+  private static final class ParamsDefaultEntryHolder {
+    static final com.google.protobuf.MapEntry<java.lang.String, com.google.protobuf.Value>
+        defaultEntry =
+            com.google.protobuf.MapEntry
+                .<java.lang.String, com.google.protobuf.Value>newDefaultInstance(
+                    com.google.cloud.retail.v2.PredictionServiceProto
+                        .internal_static_google_cloud_retail_v2_PredictRequest_ParamsEntry_descriptor,
+                    com.google.protobuf.WireFormat.FieldType.STRING,
+                    "",
+                    com.google.protobuf.WireFormat.FieldType.MESSAGE,
+                    com.google.protobuf.Value.getDefaultInstance());
+  }
+
+  private com.google.protobuf.MapField<java.lang.String, com.google.protobuf.Value> params_;
+
+  private com.google.protobuf.MapField<java.lang.String, com.google.protobuf.Value>
+      internalGetParams() {
+    if (params_ == null) {
+      return com.google.protobuf.MapField.emptyMapField(ParamsDefaultEntryHolder.defaultEntry);
+    }
+    return params_;
+  }
+
+  public int getParamsCount() {
+    return internalGetParams().getMap().size();
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Additional domain specific parameters for the predictions.
+   * Allowed values:
+   * * `returnProduct`: Boolean. If set to true, the associated product
+   *    object will be returned in the `results.metadata` field in the
+   *    prediction response.
+   * * `returnScore`: Boolean. If set to true, the prediction 'score'
+   *    corresponding to each returned product will be set in the
+   *    `results.metadata` field in the prediction response. The given
+   *    'score' indicates the probability of an product being clicked/purchased
+   *    given the user's context and history.
+   * * `strictFiltering`: Boolean. True by default. If set to false, the service
+   *    will return generic (unfiltered) popular products instead of empty if
+   *    your filter blocks all prediction results.
+   * </pre>
+   *
+   * <code>map&lt;string, .google.protobuf.Value&gt; params = 7;</code>
+   */
+  @java.lang.Override
+  public boolean containsParams(java.lang.String key) {
+    if (key == null) {
+      throw new java.lang.NullPointerException();
+    }
+    return internalGetParams().getMap().containsKey(key);
+  }
+  /** Use {@link #getParamsMap()} instead. */
+  @java.lang.Override
+  @java.lang.Deprecated
+  public java.util.Map<java.lang.String, com.google.protobuf.Value> getParams() {
+    return getParamsMap();
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Additional domain specific parameters for the predictions.
+   * Allowed values:
+   * * `returnProduct`: Boolean. If set to true, the associated product
+   *    object will be returned in the `results.metadata` field in the
+   *    prediction response.
+   * * `returnScore`: Boolean. If set to true, the prediction 'score'
+   *    corresponding to each returned product will be set in the
+   *    `results.metadata` field in the prediction response. The given
+   *    'score' indicates the probability of an product being clicked/purchased
+   *    given the user's context and history.
+   * * `strictFiltering`: Boolean. True by default. If set to false, the service
+   *    will return generic (unfiltered) popular products instead of empty if
+   *    your filter blocks all prediction results.
+   * </pre>
+   *
+   * <code>map&lt;string, .google.protobuf.Value&gt; params = 7;</code>
+   */
+  @java.lang.Override
+  public java.util.Map<java.lang.String, com.google.protobuf.Value> getParamsMap() {
+    return internalGetParams().getMap();
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Additional domain specific parameters for the predictions.
+   * Allowed values:
+   * * `returnProduct`: Boolean. If set to true, the associated product
+   *    object will be returned in the `results.metadata` field in the
+   *    prediction response.
+   * * `returnScore`: Boolean. If set to true, the prediction 'score'
+   *    corresponding to each returned product will be set in the
+   *    `results.metadata` field in the prediction response. The given
+   *    'score' indicates the probability of an product being clicked/purchased
+   *    given the user's context and history.
+   * * `strictFiltering`: Boolean. True by default. If set to false, the service
+   *    will return generic (unfiltered) popular products instead of empty if
+   *    your filter blocks all prediction results.
+   * </pre>
+   *
+   * <code>map&lt;string, .google.protobuf.Value&gt; params = 7;</code>
+   */
+  @java.lang.Override
+  public com.google.protobuf.Value getParamsOrDefault(
+      java.lang.String key, com.google.protobuf.Value defaultValue) {
+    if (key == null) {
+      throw new java.lang.NullPointerException();
+    }
+    java.util.Map<java.lang.String, com.google.protobuf.Value> map = internalGetParams().getMap();
+    return map.containsKey(key) ? map.get(key) : defaultValue;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Additional domain specific parameters for the predictions.
+   * Allowed values:
+   * * `returnProduct`: Boolean. If set to true, the associated product
+   *    object will be returned in the `results.metadata` field in the
+   *    prediction response.
+   * * `returnScore`: Boolean. If set to true, the prediction 'score'
+   *    corresponding to each returned product will be set in the
+   *    `results.metadata` field in the prediction response. The given
+   *    'score' indicates the probability of an product being clicked/purchased
+   *    given the user's context and history.
+   * * `strictFiltering`: Boolean. True by default. If set to false, the service
+   *    will return generic (unfiltered) popular products instead of empty if
+   *    your filter blocks all prediction results.
+   * </pre>
+   *
+   * <code>map&lt;string, .google.protobuf.Value&gt; params = 7;</code>
+   */
+  @java.lang.Override
+  public com.google.protobuf.Value getParamsOrThrow(java.lang.String key) {
+    if (key == null) {
+      throw new java.lang.NullPointerException();
+    }
+    java.util.Map<java.lang.String, com.google.protobuf.Value> map = internalGetParams().getMap();
+    if (!map.containsKey(key)) {
+      throw new java.lang.IllegalArgumentException();
+    }
+    return map.get(key);
+  }
+
+  public static final int LABELS_FIELD_NUMBER = 8;
+
+  private static final class LabelsDefaultEntryHolder {
+    static final com.google.protobuf.MapEntry<java.lang.String, java.lang.String> defaultEntry =
+        com.google.protobuf.MapEntry.<java.lang.String, java.lang.String>newDefaultInstance(
+            com.google.cloud.retail.v2.PredictionServiceProto
+                .internal_static_google_cloud_retail_v2_PredictRequest_LabelsEntry_descriptor,
+            com.google.protobuf.WireFormat.FieldType.STRING,
+            "",
+            com.google.protobuf.WireFormat.FieldType.STRING,
+            "");
+  }
+
+  private com.google.protobuf.MapField<java.lang.String, java.lang.String> labels_;
+
+  private com.google.protobuf.MapField<java.lang.String, java.lang.String> internalGetLabels() {
+    if (labels_ == null) {
+      return com.google.protobuf.MapField.emptyMapField(LabelsDefaultEntryHolder.defaultEntry);
+    }
+    return labels_;
+  }
+
+  public int getLabelsCount() {
+    return internalGetLabels().getMap().size();
+  }
+  /**
+   *
+   *
+   * <pre>
+   * The labels for the predict request.
+   *  * Label keys can contain lowercase letters, digits and hyphens, must start
+   *    with a letter, and must end with a letter or digit.
+   *  * Non-zero label values can contain lowercase letters, digits and hyphens,
+   *    must start with a letter, and must end with a letter or digit.
+   *  * No more than 64 labels can be associated with a given request.
+   * See https://goo.gl/xmQnxf for more information on and examples of labels.
+   * </pre>
+   *
+   * <code>map&lt;string, string&gt; labels = 8;</code>
+   */
+  @java.lang.Override
+  public boolean containsLabels(java.lang.String key) {
+    if (key == null) {
+      throw new java.lang.NullPointerException();
+    }
+    return internalGetLabels().getMap().containsKey(key);
+  }
+  /** Use {@link #getLabelsMap()} instead. */
+  @java.lang.Override
+  @java.lang.Deprecated
+  public java.util.Map<java.lang.String, java.lang.String> getLabels() {
+    return getLabelsMap();
+  }
+  /**
+   *
+   *
+   * <pre>
+   * The labels for the predict request.
+   *  * Label keys can contain lowercase letters, digits and hyphens, must start
+   *    with a letter, and must end with a letter or digit.
+   *  * Non-zero label values can contain lowercase letters, digits and hyphens,
+   *    must start with a letter, and must end with a letter or digit.
+   *  * No more than 64 labels can be associated with a given request.
+   * See https://goo.gl/xmQnxf for more information on and examples of labels.
+   * </pre>
+   *
+   * <code>map&lt;string, string&gt; labels = 8;</code>
+   */
+  @java.lang.Override
+  public java.util.Map<java.lang.String, java.lang.String> getLabelsMap() {
+    return internalGetLabels().getMap();
+  }
+  /**
+   *
+   *
+   * <pre>
+   * The labels for the predict request.
+   *  * Label keys can contain lowercase letters, digits and hyphens, must start
+   *    with a letter, and must end with a letter or digit.
+   *  * Non-zero label values can contain lowercase letters, digits and hyphens,
+   *    must start with a letter, and must end with a letter or digit.
+   *  * No more than 64 labels can be associated with a given request.
+   * See https://goo.gl/xmQnxf for more information on and examples of labels.
+   * </pre>
+   *
+   * <code>map&lt;string, string&gt; labels = 8;</code>
+   */
+  @java.lang.Override
+  public java.lang.String getLabelsOrDefault(java.lang.String key, java.lang.String defaultValue) {
+    if (key == null) {
+      throw new java.lang.NullPointerException();
+    }
+    java.util.Map<java.lang.String, java.lang.String> map = internalGetLabels().getMap();
+    return map.containsKey(key) ? map.get(key) : defaultValue;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * The labels for the predict request.
+   *  * Label keys can contain lowercase letters, digits and hyphens, must start
+   *    with a letter, and must end with a letter or digit.
+   *  * Non-zero label values can contain lowercase letters, digits and hyphens,
+   *    must start with a letter, and must end with a letter or digit.
+   *  * No more than 64 labels can be associated with a given request.
+   * See https://goo.gl/xmQnxf for more information on and examples of labels.
+   * </pre>
+   *
+   * <code>map&lt;string, string&gt; labels = 8;</code>
+   */
+  @java.lang.Override
+  public java.lang.String getLabelsOrThrow(java.lang.String key) {
+    if (key == null) {
+      throw new java.lang.NullPointerException();
+    }
+    java.util.Map<java.lang.String, java.lang.String> map = internalGetLabels().getMap();
+    if (!map.containsKey(key)) {
+      throw new java.lang.IllegalArgumentException();
+    }
+    return map.get(key);
+  }
+
+  private byte memoizedIsInitialized = -1;
+
+  @java.lang.Override
+  public final boolean isInitialized() {
+    byte isInitialized = memoizedIsInitialized;
+    if (isInitialized == 1) return true;
+    if (isInitialized == 0) return false;
+
+    memoizedIsInitialized = 1;
+    return true;
+  }
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+  @java.lang.Override
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+      com.google.protobuf.GeneratedMessageV3.writeString(output, 1, placement_);
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+    if (!getFilterBytes().isEmpty()) {
+      com.google.protobuf.GeneratedMessageV3.writeString(output, 5, filter_);
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+  @java.lang.Override
+  public boolean equals(final java.lang.Object obj) {
+    if (obj == this) {
+      return true;
+    }
+    if (!(obj instanceof com.google.cloud.retail.v2.PredictRequest)) {
+      return super.equals(obj);
+    }
+    com.google.cloud.retail.v2.PredictRequest other =
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+
+    if (!getPlacement().equals(other.getPlacement())) return false;
+    if (hasUserEvent() != other.hasUserEvent()) return false;
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+    if (!getPageToken().equals(other.getPageToken())) return false;
+    if (!getFilter().equals(other.getFilter())) return false;
+    if (getValidateOnly() != other.getValidateOnly()) return false;
+    if (!internalGetParams().equals(other.internalGetParams())) return false;
+    if (!internalGetLabels().equals(other.internalGetLabels())) return false;
+    if (!unknownFields.equals(other.unknownFields)) return false;
+    return true;
+  }
+
+  @java.lang.Override
+  public int hashCode() {
+    if (memoizedHashCode != 0) {
+      return memoizedHashCode;
+    }
+    int hash = 41;
+    hash = (19 * hash) + getDescriptor().hashCode();
+    hash = (37 * hash) + PLACEMENT_FIELD_NUMBER;
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+    memoizedHashCode = hash;
+    return hash;
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+
+  public static com.google.cloud.retail.v2.PredictRequest parseFrom(java.nio.ByteBuffer data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.PredictRequest parseFrom(
+      java.nio.ByteBuffer data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.PredictRequest parseFrom(
+      com.google.protobuf.ByteString data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.PredictRequest parseFrom(
+      com.google.protobuf.ByteString data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.PredictRequest parseFrom(byte[] data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.PredictRequest parseFrom(
+      byte[] data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.PredictRequest parseFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.PredictRequest parseFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.PredictRequest parseDelimitedFrom(
+      java.io.InputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.PredictRequest parseDelimitedFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(
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+  }
+
+  public static com.google.cloud.retail.v2.PredictRequest parseFrom(
+      com.google.protobuf.CodedInputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.PredictRequest parseFrom(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  @java.lang.Override
+  public Builder newBuilderForType() {
+    return newBuilder();
+  }
+
+  public static Builder newBuilder() {
+    return DEFAULT_INSTANCE.toBuilder();
+  }
+
+  public static Builder newBuilder(com.google.cloud.retail.v2.PredictRequest prototype) {
+    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+  }
+
+  @java.lang.Override
+  public Builder toBuilder() {
+    return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
+  }
+
+  @java.lang.Override
+  protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+    Builder builder = new Builder(parent);
+    return builder;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Request message for Predict method.
+   * </pre>
+   *
+   * Protobuf type {@code google.cloud.retail.v2.PredictRequest}
+   */
+  public static final class Builder extends com.google.protobuf.GeneratedMessageV3.Builder<Builder>
+      implements
+      // @@protoc_insertion_point(builder_implements:google.cloud.retail.v2.PredictRequest)
+      com.google.cloud.retail.v2.PredictRequestOrBuilder {
+    public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+      return com.google.cloud.retail.v2.PredictionServiceProto
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+    }
+
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+
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+        case 8:
+          return internalGetMutableLabels();
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+          .ensureFieldAccessorsInitialized(
+              com.google.cloud.retail.v2.PredictRequest.class,
+              com.google.cloud.retail.v2.PredictRequest.Builder.class);
+    }
+
+    // Construct using com.google.cloud.retail.v2.PredictRequest.newBuilder()
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
+
+    private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+      super(parent);
+      maybeForceBuilderInitialization();
+    }
+
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders) {}
+    }
+
+    @java.lang.Override
+    public Builder clear() {
+      super.clear();
+      placement_ = "";
+
+      if (userEventBuilder_ == null) {
+        userEvent_ = null;
+      } else {
+        userEvent_ = null;
+        userEventBuilder_ = null;
+      }
+      pageSize_ = 0;
+
+      pageToken_ = "";
+
+      filter_ = "";
+
+      validateOnly_ = false;
+
+      internalGetMutableParams().clear();
+      internalGetMutableLabels().clear();
+      return this;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
+      return com.google.cloud.retail.v2.PredictionServiceProto
+          .internal_static_google_cloud_retail_v2_PredictRequest_descriptor;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.PredictRequest getDefaultInstanceForType() {
+      return com.google.cloud.retail.v2.PredictRequest.getDefaultInstance();
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.PredictRequest build() {
+      com.google.cloud.retail.v2.PredictRequest result = buildPartial();
+      if (!result.isInitialized()) {
+        throw newUninitializedMessageException(result);
+      }
+      return result;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.PredictRequest buildPartial() {
+      com.google.cloud.retail.v2.PredictRequest result =
+          new com.google.cloud.retail.v2.PredictRequest(this);
+      int from_bitField0_ = bitField0_;
+      result.placement_ = placement_;
+      if (userEventBuilder_ == null) {
+        result.userEvent_ = userEvent_;
+      } else {
+        result.userEvent_ = userEventBuilder_.build();
+      }
+      result.pageSize_ = pageSize_;
+      result.pageToken_ = pageToken_;
+      result.filter_ = filter_;
+      result.validateOnly_ = validateOnly_;
+      result.params_ = internalGetParams();
+      result.params_.makeImmutable();
+      result.labels_ = internalGetLabels();
+      result.labels_.makeImmutable();
+      onBuilt();
+      return result;
+    }
+
+    @java.lang.Override
+    public Builder clone() {
+      return super.clone();
+    }
+
+    @java.lang.Override
+    public Builder setField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.setField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
+      return super.clearField(field);
+    }
+
+    @java.lang.Override
+    public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+      return super.clearOneof(oneof);
+    }
+
+    @java.lang.Override
+    public Builder setRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, int index, java.lang.Object value) {
+      return super.setRepeatedField(field, index, value);
+    }
+
+    @java.lang.Override
+    public Builder addRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.addRepeatedField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(com.google.protobuf.Message other) {
+      if (other instanceof com.google.cloud.retail.v2.PredictRequest) {
+        return mergeFrom((com.google.cloud.retail.v2.PredictRequest) other);
+      } else {
+        super.mergeFrom(other);
+        return this;
+      }
+    }
+
+    public Builder mergeFrom(com.google.cloud.retail.v2.PredictRequest other) {
+      if (other == com.google.cloud.retail.v2.PredictRequest.getDefaultInstance()) return this;
+      if (!other.getPlacement().isEmpty()) {
+        placement_ = other.placement_;
+        onChanged();
+      }
+      if (other.hasUserEvent()) {
+        mergeUserEvent(other.getUserEvent());
+      }
+      if (other.getPageSize() != 0) {
+        setPageSize(other.getPageSize());
+      }
+      if (!other.getPageToken().isEmpty()) {
+        pageToken_ = other.pageToken_;
+        onChanged();
+      }
+      if (!other.getFilter().isEmpty()) {
+        filter_ = other.filter_;
+        onChanged();
+      }
+      if (other.getValidateOnly() != false) {
+        setValidateOnly(other.getValidateOnly());
+      }
+      internalGetMutableParams().mergeFrom(other.internalGetParams());
+      internalGetMutableLabels().mergeFrom(other.internalGetLabels());
+      this.mergeUnknownFields(other.unknownFields);
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final boolean isInitialized() {
+      return true;
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      com.google.cloud.retail.v2.PredictRequest parsedMessage = null;
+      try {
+        parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        parsedMessage = (com.google.cloud.retail.v2.PredictRequest) e.getUnfinishedMessage();
+        throw e.unwrapIOException();
+      } finally {
+        if (parsedMessage != null) {
+          mergeFrom(parsedMessage);
+        }
+      }
+      return this;
+    }
+
+    private int bitField0_;
+
+    private java.lang.Object placement_ = "";
+    /**
+     *
+     *
+     * <pre>
+     * Required. Full resource name of the format:
+     * {name=projects/&#42;&#47;locations/global/catalogs/default_catalog/placements/&#42;}
+     * The id of the recommendation engine placement. This id is used to identify
+     * the set of models that will be used to make the prediction.
+     * We currently support three placements with the following IDs by default:
+     * * `shopping_cart`: Predicts products frequently bought together with one or
+     *   more  products in the same shopping session. Commonly displayed after
+     *   `add-to-cart` events, on product detail pages, or on the shopping cart
+     *   page.
+     * * `home_page`: Predicts the next product that a user will most likely
+     *   engage with or purchase based on the shopping or viewing history of the
+     *   specified `userId` or `visitorId`. For example - Recommendations for you.
+     * * `product_detail`: Predicts the next product that a user will most likely
+     *   engage with or purchase. The prediction is based on the shopping or
+     *   viewing history of the specified `userId` or `visitorId` and its
+     *   relevance to a specified `CatalogItem`. Typically used on product detail
+     *   pages. For example - More products like this.
+     * * `recently_viewed_default`: Returns up to 75 products recently viewed by
+     *   the specified `userId` or `visitorId`, most recent ones first. Returns
+     *   nothing if neither of them has viewed any products yet. For example -
+     *   Recently viewed.
+     * The full list of available placements can be seen at
+     * https://console.cloud.google.com/recommendation/catalogs/default_catalog/placements
+     * </pre>
+     *
+     * <code>string placement = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @return The placement.
+     */
+    public java.lang.String getPlacement() {
+      java.lang.Object ref = placement_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        placement_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. Full resource name of the format:
+     * {name=projects/&#42;&#47;locations/global/catalogs/default_catalog/placements/&#42;}
+     * The id of the recommendation engine placement. This id is used to identify
+     * the set of models that will be used to make the prediction.
+     * We currently support three placements with the following IDs by default:
+     * * `shopping_cart`: Predicts products frequently bought together with one or
+     *   more  products in the same shopping session. Commonly displayed after
+     *   `add-to-cart` events, on product detail pages, or on the shopping cart
+     *   page.
+     * * `home_page`: Predicts the next product that a user will most likely
+     *   engage with or purchase based on the shopping or viewing history of the
+     *   specified `userId` or `visitorId`. For example - Recommendations for you.
+     * * `product_detail`: Predicts the next product that a user will most likely
+     *   engage with or purchase. The prediction is based on the shopping or
+     *   viewing history of the specified `userId` or `visitorId` and its
+     *   relevance to a specified `CatalogItem`. Typically used on product detail
+     *   pages. For example - More products like this.
+     * * `recently_viewed_default`: Returns up to 75 products recently viewed by
+     *   the specified `userId` or `visitorId`, most recent ones first. Returns
+     *   nothing if neither of them has viewed any products yet. For example -
+     *   Recently viewed.
+     * The full list of available placements can be seen at
+     * https://console.cloud.google.com/recommendation/catalogs/default_catalog/placements
+     * </pre>
+     *
+     * <code>string placement = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @return The bytes for placement.
+     */
+    public com.google.protobuf.ByteString getPlacementBytes() {
+      java.lang.Object ref = placement_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b =
+            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+        placement_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. Full resource name of the format:
+     * {name=projects/&#42;&#47;locations/global/catalogs/default_catalog/placements/&#42;}
+     * The id of the recommendation engine placement. This id is used to identify
+     * the set of models that will be used to make the prediction.
+     * We currently support three placements with the following IDs by default:
+     * * `shopping_cart`: Predicts products frequently bought together with one or
+     *   more  products in the same shopping session. Commonly displayed after
+     *   `add-to-cart` events, on product detail pages, or on the shopping cart
+     *   page.
+     * * `home_page`: Predicts the next product that a user will most likely
+     *   engage with or purchase based on the shopping or viewing history of the
+     *   specified `userId` or `visitorId`. For example - Recommendations for you.
+     * * `product_detail`: Predicts the next product that a user will most likely
+     *   engage with or purchase. The prediction is based on the shopping or
+     *   viewing history of the specified `userId` or `visitorId` and its
+     *   relevance to a specified `CatalogItem`. Typically used on product detail
+     *   pages. For example - More products like this.
+     * * `recently_viewed_default`: Returns up to 75 products recently viewed by
+     *   the specified `userId` or `visitorId`, most recent ones first. Returns
+     *   nothing if neither of them has viewed any products yet. For example -
+     *   Recently viewed.
+     * The full list of available placements can be seen at
+     * https://console.cloud.google.com/recommendation/catalogs/default_catalog/placements
+     * </pre>
+     *
+     * <code>string placement = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @param value The placement to set.
+     * @return This builder for chaining.
+     */
+    public Builder setPlacement(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+
+      placement_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. Full resource name of the format:
+     * {name=projects/&#42;&#47;locations/global/catalogs/default_catalog/placements/&#42;}
+     * The id of the recommendation engine placement. This id is used to identify
+     * the set of models that will be used to make the prediction.
+     * We currently support three placements with the following IDs by default:
+     * * `shopping_cart`: Predicts products frequently bought together with one or
+     *   more  products in the same shopping session. Commonly displayed after
+     *   `add-to-cart` events, on product detail pages, or on the shopping cart
+     *   page.
+     * * `home_page`: Predicts the next product that a user will most likely
+     *   engage with or purchase based on the shopping or viewing history of the
+     *   specified `userId` or `visitorId`. For example - Recommendations for you.
+     * * `product_detail`: Predicts the next product that a user will most likely
+     *   engage with or purchase. The prediction is based on the shopping or
+     *   viewing history of the specified `userId` or `visitorId` and its
+     *   relevance to a specified `CatalogItem`. Typically used on product detail
+     *   pages. For example - More products like this.
+     * * `recently_viewed_default`: Returns up to 75 products recently viewed by
+     *   the specified `userId` or `visitorId`, most recent ones first. Returns
+     *   nothing if neither of them has viewed any products yet. For example -
+     *   Recently viewed.
+     * The full list of available placements can be seen at
+     * https://console.cloud.google.com/recommendation/catalogs/default_catalog/placements
+     * </pre>
+     *
+     * <code>string placement = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearPlacement() {
+
+      placement_ = getDefaultInstance().getPlacement();
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. Full resource name of the format:
+     * {name=projects/&#42;&#47;locations/global/catalogs/default_catalog/placements/&#42;}
+     * The id of the recommendation engine placement. This id is used to identify
+     * the set of models that will be used to make the prediction.
+     * We currently support three placements with the following IDs by default:
+     * * `shopping_cart`: Predicts products frequently bought together with one or
+     *   more  products in the same shopping session. Commonly displayed after
+     *   `add-to-cart` events, on product detail pages, or on the shopping cart
+     *   page.
+     * * `home_page`: Predicts the next product that a user will most likely
+     *   engage with or purchase based on the shopping or viewing history of the
+     *   specified `userId` or `visitorId`. For example - Recommendations for you.
+     * * `product_detail`: Predicts the next product that a user will most likely
+     *   engage with or purchase. The prediction is based on the shopping or
+     *   viewing history of the specified `userId` or `visitorId` and its
+     *   relevance to a specified `CatalogItem`. Typically used on product detail
+     *   pages. For example - More products like this.
+     * * `recently_viewed_default`: Returns up to 75 products recently viewed by
+     *   the specified `userId` or `visitorId`, most recent ones first. Returns
+     *   nothing if neither of them has viewed any products yet. For example -
+     *   Recently viewed.
+     * The full list of available placements can be seen at
+     * https://console.cloud.google.com/recommendation/catalogs/default_catalog/placements
+     * </pre>
+     *
+     * <code>string placement = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @param value The bytes for placement to set.
+     * @return This builder for chaining.
+     */
+    public Builder setPlacementBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+
+      placement_ = value;
+      onChanged();
+      return this;
+    }
+
+    private com.google.cloud.retail.v2.UserEvent userEvent_;
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.cloud.retail.v2.UserEvent,
+            com.google.cloud.retail.v2.UserEvent.Builder,
+            com.google.cloud.retail.v2.UserEventOrBuilder>
+        userEventBuilder_;
+    /**
+     *
+     *
+     * <pre>
+     * Required. Context about the user, what they are looking at and what action
+     * they took to trigger the predict request. Note that this user event detail
+     * won't be ingested to userEvent logs. Thus, a separate userEvent write
+     * request is required for event logging.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.UserEvent user_event = 2 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     *
+     * @return Whether the userEvent field is set.
+     */
+    public boolean hasUserEvent() {
+      return userEventBuilder_ != null || userEvent_ != null;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. Context about the user, what they are looking at and what action
+     * they took to trigger the predict request. Note that this user event detail
+     * won't be ingested to userEvent logs. Thus, a separate userEvent write
+     * request is required for event logging.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.UserEvent user_event = 2 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     *
+     * @return The userEvent.
+     */
+    public com.google.cloud.retail.v2.UserEvent getUserEvent() {
+      if (userEventBuilder_ == null) {
+        return userEvent_ == null
+            ? com.google.cloud.retail.v2.UserEvent.getDefaultInstance()
+            : userEvent_;
+      } else {
+        return userEventBuilder_.getMessage();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. Context about the user, what they are looking at and what action
+     * they took to trigger the predict request. Note that this user event detail
+     * won't be ingested to userEvent logs. Thus, a separate userEvent write
+     * request is required for event logging.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.UserEvent user_event = 2 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder setUserEvent(com.google.cloud.retail.v2.UserEvent value) {
+      if (userEventBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        userEvent_ = value;
+        onChanged();
+      } else {
+        userEventBuilder_.setMessage(value);
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. Context about the user, what they are looking at and what action
+     * they took to trigger the predict request. Note that this user event detail
+     * won't be ingested to userEvent logs. Thus, a separate userEvent write
+     * request is required for event logging.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.UserEvent user_event = 2 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder setUserEvent(com.google.cloud.retail.v2.UserEvent.Builder builderForValue) {
+      if (userEventBuilder_ == null) {
+        userEvent_ = builderForValue.build();
+        onChanged();
+      } else {
+        userEventBuilder_.setMessage(builderForValue.build());
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. Context about the user, what they are looking at and what action
+     * they took to trigger the predict request. Note that this user event detail
+     * won't be ingested to userEvent logs. Thus, a separate userEvent write
+     * request is required for event logging.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.UserEvent user_event = 2 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder mergeUserEvent(com.google.cloud.retail.v2.UserEvent value) {
+      if (userEventBuilder_ == null) {
+        if (userEvent_ != null) {
+          userEvent_ =
+              com.google.cloud.retail.v2.UserEvent.newBuilder(userEvent_)
+                  .mergeFrom(value)
+                  .buildPartial();
+        } else {
+          userEvent_ = value;
+        }
+        onChanged();
+      } else {
+        userEventBuilder_.mergeFrom(value);
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. Context about the user, what they are looking at and what action
+     * they took to trigger the predict request. Note that this user event detail
+     * won't be ingested to userEvent logs. Thus, a separate userEvent write
+     * request is required for event logging.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.UserEvent user_event = 2 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder clearUserEvent() {
+      if (userEventBuilder_ == null) {
+        userEvent_ = null;
+        onChanged();
+      } else {
+        userEvent_ = null;
+        userEventBuilder_ = null;
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. Context about the user, what they are looking at and what action
+     * they took to trigger the predict request. Note that this user event detail
+     * won't be ingested to userEvent logs. Thus, a separate userEvent write
+     * request is required for event logging.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.UserEvent user_event = 2 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public com.google.cloud.retail.v2.UserEvent.Builder getUserEventBuilder() {
+
+      onChanged();
+      return getUserEventFieldBuilder().getBuilder();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. Context about the user, what they are looking at and what action
+     * they took to trigger the predict request. Note that this user event detail
+     * won't be ingested to userEvent logs. Thus, a separate userEvent write
+     * request is required for event logging.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.UserEvent user_event = 2 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public com.google.cloud.retail.v2.UserEventOrBuilder getUserEventOrBuilder() {
+      if (userEventBuilder_ != null) {
+        return userEventBuilder_.getMessageOrBuilder();
+      } else {
+        return userEvent_ == null
+            ? com.google.cloud.retail.v2.UserEvent.getDefaultInstance()
+            : userEvent_;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. Context about the user, what they are looking at and what action
+     * they took to trigger the predict request. Note that this user event detail
+     * won't be ingested to userEvent logs. Thus, a separate userEvent write
+     * request is required for event logging.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.UserEvent user_event = 2 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.cloud.retail.v2.UserEvent,
+            com.google.cloud.retail.v2.UserEvent.Builder,
+            com.google.cloud.retail.v2.UserEventOrBuilder>
+        getUserEventFieldBuilder() {
+      if (userEventBuilder_ == null) {
+        userEventBuilder_ =
+            new com.google.protobuf.SingleFieldBuilderV3<
+                com.google.cloud.retail.v2.UserEvent,
+                com.google.cloud.retail.v2.UserEvent.Builder,
+                com.google.cloud.retail.v2.UserEventOrBuilder>(
+                getUserEvent(), getParentForChildren(), isClean());
+        userEvent_ = null;
+      }
+      return userEventBuilder_;
+    }
+
+    private int pageSize_;
+    /**
+     *
+     *
+     * <pre>
+     * Maximum number of results to return per page. Set this property
+     * to the number of prediction results needed. If zero, the service will
+     * choose a reasonable default. The maximum allowed value is 100. Values
+     * above 100 will be coerced to 100.
+     * </pre>
+     *
+     * <code>int32 page_size = 3;</code>
+     *
+     * @return The pageSize.
+     */
+    @java.lang.Override
+    public int getPageSize() {
+      return pageSize_;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Maximum number of results to return per page. Set this property
+     * to the number of prediction results needed. If zero, the service will
+     * choose a reasonable default. The maximum allowed value is 100. Values
+     * above 100 will be coerced to 100.
+     * </pre>
+     *
+     * <code>int32 page_size = 3;</code>
+     *
+     * @param value The pageSize to set.
+     * @return This builder for chaining.
+     */
+    public Builder setPageSize(int value) {
+
+      pageSize_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Maximum number of results to return per page. Set this property
+     * to the number of prediction results needed. If zero, the service will
+     * choose a reasonable default. The maximum allowed value is 100. Values
+     * above 100 will be coerced to 100.
+     * </pre>
+     *
+     * <code>int32 page_size = 3;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearPageSize() {
+
+      pageSize_ = 0;
+      onChanged();
+      return this;
+    }
+
+    private java.lang.Object pageToken_ = "";
+    /**
+     *
+     *
+     * <pre>
+     * The previous PredictResponse.next_page_token.
+     * </pre>
+     *
+     * <code>string page_token = 4;</code>
+     *
+     * @return The pageToken.
+     */
+    public java.lang.String getPageToken() {
+      java.lang.Object ref = pageToken_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        pageToken_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The previous PredictResponse.next_page_token.
+     * </pre>
+     *
+     * <code>string page_token = 4;</code>
+     *
+     * @return The bytes for pageToken.
+     */
+    public com.google.protobuf.ByteString getPageTokenBytes() {
+      java.lang.Object ref = pageToken_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b =
+            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+        pageToken_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The previous PredictResponse.next_page_token.
+     * </pre>
+     *
+     * <code>string page_token = 4;</code>
+     *
+     * @param value The pageToken to set.
+     * @return This builder for chaining.
+     */
+    public Builder setPageToken(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+
+      pageToken_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The previous PredictResponse.next_page_token.
+     * </pre>
+     *
+     * <code>string page_token = 4;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearPageToken() {
+
+      pageToken_ = getDefaultInstance().getPageToken();
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The previous PredictResponse.next_page_token.
+     * </pre>
+     *
+     * <code>string page_token = 4;</code>
+     *
+     * @param value The bytes for pageToken to set.
+     * @return This builder for chaining.
+     */
+    public Builder setPageTokenBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+
+      pageToken_ = value;
+      onChanged();
+      return this;
+    }
+
+    private java.lang.Object filter_ = "";
+    /**
+     *
+     *
+     * <pre>
+     * Filter for restricting prediction results with a length limit of 5,000
+     * characters. Accepts values for tags and the `filterOutOfStockItems` flag.
+     *  * Tag expressions. Restricts predictions to products that match all of the
+     *    specified tags. Boolean operators `OR` and `NOT` are supported if the
+     *    expression is enclosed in parentheses, and must be separated from the
+     *    tag values by a space. `-"tagA"` is also supported and is equivalent to
+     *    `NOT "tagA"`. Tag values must be double quoted UTF-8 encoded strings
+     *    with a size limit of 1,000 characters.
+     *  * filterOutOfStockItems. Restricts predictions to products that do not
+     *  have a
+     *    stockState value of OUT_OF_STOCK.
+     * Examples:
+     *  * tag=("Red" OR "Blue") tag="New-Arrival" tag=(NOT "promotional")
+     *  * filterOutOfStockItems  tag=(-"promotional")
+     *  * filterOutOfStockItems
+     * If your filter blocks all prediction results, nothing will be returned. If
+     * you want generic (unfiltered) popular products to be returned instead, set
+     * `strictFiltering` to false in `PredictRequest.params`.
+     * </pre>
+     *
+     * <code>string filter = 5;</code>
+     *
+     * @return The filter.
+     */
+    public java.lang.String getFilter() {
+      java.lang.Object ref = filter_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        filter_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Filter for restricting prediction results with a length limit of 5,000
+     * characters. Accepts values for tags and the `filterOutOfStockItems` flag.
+     *  * Tag expressions. Restricts predictions to products that match all of the
+     *    specified tags. Boolean operators `OR` and `NOT` are supported if the
+     *    expression is enclosed in parentheses, and must be separated from the
+     *    tag values by a space. `-"tagA"` is also supported and is equivalent to
+     *    `NOT "tagA"`. Tag values must be double quoted UTF-8 encoded strings
+     *    with a size limit of 1,000 characters.
+     *  * filterOutOfStockItems. Restricts predictions to products that do not
+     *  have a
+     *    stockState value of OUT_OF_STOCK.
+     * Examples:
+     *  * tag=("Red" OR "Blue") tag="New-Arrival" tag=(NOT "promotional")
+     *  * filterOutOfStockItems  tag=(-"promotional")
+     *  * filterOutOfStockItems
+     * If your filter blocks all prediction results, nothing will be returned. If
+     * you want generic (unfiltered) popular products to be returned instead, set
+     * `strictFiltering` to false in `PredictRequest.params`.
+     * </pre>
+     *
+     * <code>string filter = 5;</code>
+     *
+     * @return The bytes for filter.
+     */
+    public com.google.protobuf.ByteString getFilterBytes() {
+      java.lang.Object ref = filter_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b =
+            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+        filter_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Filter for restricting prediction results with a length limit of 5,000
+     * characters. Accepts values for tags and the `filterOutOfStockItems` flag.
+     *  * Tag expressions. Restricts predictions to products that match all of the
+     *    specified tags. Boolean operators `OR` and `NOT` are supported if the
+     *    expression is enclosed in parentheses, and must be separated from the
+     *    tag values by a space. `-"tagA"` is also supported and is equivalent to
+     *    `NOT "tagA"`. Tag values must be double quoted UTF-8 encoded strings
+     *    with a size limit of 1,000 characters.
+     *  * filterOutOfStockItems. Restricts predictions to products that do not
+     *  have a
+     *    stockState value of OUT_OF_STOCK.
+     * Examples:
+     *  * tag=("Red" OR "Blue") tag="New-Arrival" tag=(NOT "promotional")
+     *  * filterOutOfStockItems  tag=(-"promotional")
+     *  * filterOutOfStockItems
+     * If your filter blocks all prediction results, nothing will be returned. If
+     * you want generic (unfiltered) popular products to be returned instead, set
+     * `strictFiltering` to false in `PredictRequest.params`.
+     * </pre>
+     *
+     * <code>string filter = 5;</code>
+     *
+     * @param value The filter to set.
+     * @return This builder for chaining.
+     */
+    public Builder setFilter(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+
+      filter_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Filter for restricting prediction results with a length limit of 5,000
+     * characters. Accepts values for tags and the `filterOutOfStockItems` flag.
+     *  * Tag expressions. Restricts predictions to products that match all of the
+     *    specified tags. Boolean operators `OR` and `NOT` are supported if the
+     *    expression is enclosed in parentheses, and must be separated from the
+     *    tag values by a space. `-"tagA"` is also supported and is equivalent to
+     *    `NOT "tagA"`. Tag values must be double quoted UTF-8 encoded strings
+     *    with a size limit of 1,000 characters.
+     *  * filterOutOfStockItems. Restricts predictions to products that do not
+     *  have a
+     *    stockState value of OUT_OF_STOCK.
+     * Examples:
+     *  * tag=("Red" OR "Blue") tag="New-Arrival" tag=(NOT "promotional")
+     *  * filterOutOfStockItems  tag=(-"promotional")
+     *  * filterOutOfStockItems
+     * If your filter blocks all prediction results, nothing will be returned. If
+     * you want generic (unfiltered) popular products to be returned instead, set
+     * `strictFiltering` to false in `PredictRequest.params`.
+     * </pre>
+     *
+     * <code>string filter = 5;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearFilter() {
+
+      filter_ = getDefaultInstance().getFilter();
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Filter for restricting prediction results with a length limit of 5,000
+     * characters. Accepts values for tags and the `filterOutOfStockItems` flag.
+     *  * Tag expressions. Restricts predictions to products that match all of the
+     *    specified tags. Boolean operators `OR` and `NOT` are supported if the
+     *    expression is enclosed in parentheses, and must be separated from the
+     *    tag values by a space. `-"tagA"` is also supported and is equivalent to
+     *    `NOT "tagA"`. Tag values must be double quoted UTF-8 encoded strings
+     *    with a size limit of 1,000 characters.
+     *  * filterOutOfStockItems. Restricts predictions to products that do not
+     *  have a
+     *    stockState value of OUT_OF_STOCK.
+     * Examples:
+     *  * tag=("Red" OR "Blue") tag="New-Arrival" tag=(NOT "promotional")
+     *  * filterOutOfStockItems  tag=(-"promotional")
+     *  * filterOutOfStockItems
+     * If your filter blocks all prediction results, nothing will be returned. If
+     * you want generic (unfiltered) popular products to be returned instead, set
+     * `strictFiltering` to false in `PredictRequest.params`.
+     * </pre>
+     *
+     * <code>string filter = 5;</code>
+     *
+     * @param value The bytes for filter to set.
+     * @return This builder for chaining.
+     */
+    public Builder setFilterBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+
+      filter_ = value;
+      onChanged();
+      return this;
+    }
+
+    private boolean validateOnly_;
+    /**
+     *
+     *
+     * <pre>
+     * Use validate only mode for this prediction query. If set to true, a
+     * dummy model will be used that returns arbitrary products.
+     * Note that the validate only mode should only be used for testing the API,
+     * or if the model is not ready.
+     * </pre>
+     *
+     * <code>bool validate_only = 6;</code>
+     *
+     * @return The validateOnly.
+     */
+    @java.lang.Override
+    public boolean getValidateOnly() {
+      return validateOnly_;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Use validate only mode for this prediction query. If set to true, a
+     * dummy model will be used that returns arbitrary products.
+     * Note that the validate only mode should only be used for testing the API,
+     * or if the model is not ready.
+     * </pre>
+     *
+     * <code>bool validate_only = 6;</code>
+     *
+     * @param value The validateOnly to set.
+     * @return This builder for chaining.
+     */
+    public Builder setValidateOnly(boolean value) {
+
+      validateOnly_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Use validate only mode for this prediction query. If set to true, a
+     * dummy model will be used that returns arbitrary products.
+     * Note that the validate only mode should only be used for testing the API,
+     * or if the model is not ready.
+     * </pre>
+     *
+     * <code>bool validate_only = 6;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearValidateOnly() {
+
+      validateOnly_ = false;
+      onChanged();
+      return this;
+    }
+
+    private com.google.protobuf.MapField<java.lang.String, com.google.protobuf.Value> params_;
+
+    private com.google.protobuf.MapField<java.lang.String, com.google.protobuf.Value>
+        internalGetParams() {
+      if (params_ == null) {
+        return com.google.protobuf.MapField.emptyMapField(ParamsDefaultEntryHolder.defaultEntry);
+      }
+      return params_;
+    }
+
+    private com.google.protobuf.MapField<java.lang.String, com.google.protobuf.Value>
+        internalGetMutableParams() {
+      onChanged();
+      ;
+      if (params_ == null) {
+        params_ = com.google.protobuf.MapField.newMapField(ParamsDefaultEntryHolder.defaultEntry);
+      }
+      if (!params_.isMutable()) {
+        params_ = params_.copy();
+      }
+      return params_;
+    }
+
+    public int getParamsCount() {
+      return internalGetParams().getMap().size();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Additional domain specific parameters for the predictions.
+     * Allowed values:
+     * * `returnProduct`: Boolean. If set to true, the associated product
+     *    object will be returned in the `results.metadata` field in the
+     *    prediction response.
+     * * `returnScore`: Boolean. If set to true, the prediction 'score'
+     *    corresponding to each returned product will be set in the
+     *    `results.metadata` field in the prediction response. The given
+     *    'score' indicates the probability of an product being clicked/purchased
+     *    given the user's context and history.
+     * * `strictFiltering`: Boolean. True by default. If set to false, the service
+     *    will return generic (unfiltered) popular products instead of empty if
+     *    your filter blocks all prediction results.
+     * </pre>
+     *
+     * <code>map&lt;string, .google.protobuf.Value&gt; params = 7;</code>
+     */
+    @java.lang.Override
+    public boolean containsParams(java.lang.String key) {
+      if (key == null) {
+        throw new java.lang.NullPointerException();
+      }
+      return internalGetParams().getMap().containsKey(key);
+    }
+    /** Use {@link #getParamsMap()} instead. */
+    @java.lang.Override
+    @java.lang.Deprecated
+    public java.util.Map<java.lang.String, com.google.protobuf.Value> getParams() {
+      return getParamsMap();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Additional domain specific parameters for the predictions.
+     * Allowed values:
+     * * `returnProduct`: Boolean. If set to true, the associated product
+     *    object will be returned in the `results.metadata` field in the
+     *    prediction response.
+     * * `returnScore`: Boolean. If set to true, the prediction 'score'
+     *    corresponding to each returned product will be set in the
+     *    `results.metadata` field in the prediction response. The given
+     *    'score' indicates the probability of an product being clicked/purchased
+     *    given the user's context and history.
+     * * `strictFiltering`: Boolean. True by default. If set to false, the service
+     *    will return generic (unfiltered) popular products instead of empty if
+     *    your filter blocks all prediction results.
+     * </pre>
+     *
+     * <code>map&lt;string, .google.protobuf.Value&gt; params = 7;</code>
+     */
+    @java.lang.Override
+    public java.util.Map<java.lang.String, com.google.protobuf.Value> getParamsMap() {
+      return internalGetParams().getMap();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Additional domain specific parameters for the predictions.
+     * Allowed values:
+     * * `returnProduct`: Boolean. If set to true, the associated product
+     *    object will be returned in the `results.metadata` field in the
+     *    prediction response.
+     * * `returnScore`: Boolean. If set to true, the prediction 'score'
+     *    corresponding to each returned product will be set in the
+     *    `results.metadata` field in the prediction response. The given
+     *    'score' indicates the probability of an product being clicked/purchased
+     *    given the user's context and history.
+     * * `strictFiltering`: Boolean. True by default. If set to false, the service
+     *    will return generic (unfiltered) popular products instead of empty if
+     *    your filter blocks all prediction results.
+     * </pre>
+     *
+     * <code>map&lt;string, .google.protobuf.Value&gt; params = 7;</code>
+     */
+    @java.lang.Override
+    public com.google.protobuf.Value getParamsOrDefault(
+        java.lang.String key, com.google.protobuf.Value defaultValue) {
+      if (key == null) {
+        throw new java.lang.NullPointerException();
+      }
+      java.util.Map<java.lang.String, com.google.protobuf.Value> map = internalGetParams().getMap();
+      return map.containsKey(key) ? map.get(key) : defaultValue;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Additional domain specific parameters for the predictions.
+     * Allowed values:
+     * * `returnProduct`: Boolean. If set to true, the associated product
+     *    object will be returned in the `results.metadata` field in the
+     *    prediction response.
+     * * `returnScore`: Boolean. If set to true, the prediction 'score'
+     *    corresponding to each returned product will be set in the
+     *    `results.metadata` field in the prediction response. The given
+     *    'score' indicates the probability of an product being clicked/purchased
+     *    given the user's context and history.
+     * * `strictFiltering`: Boolean. True by default. If set to false, the service
+     *    will return generic (unfiltered) popular products instead of empty if
+     *    your filter blocks all prediction results.
+     * </pre>
+     *
+     * <code>map&lt;string, .google.protobuf.Value&gt; params = 7;</code>
+     */
+    @java.lang.Override
+    public com.google.protobuf.Value getParamsOrThrow(java.lang.String key) {
+      if (key == null) {
+        throw new java.lang.NullPointerException();
+      }
+      java.util.Map<java.lang.String, com.google.protobuf.Value> map = internalGetParams().getMap();
+      if (!map.containsKey(key)) {
+        throw new java.lang.IllegalArgumentException();
+      }
+      return map.get(key);
+    }
+
+    public Builder clearParams() {
+      internalGetMutableParams().getMutableMap().clear();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Additional domain specific parameters for the predictions.
+     * Allowed values:
+     * * `returnProduct`: Boolean. If set to true, the associated product
+     *    object will be returned in the `results.metadata` field in the
+     *    prediction response.
+     * * `returnScore`: Boolean. If set to true, the prediction 'score'
+     *    corresponding to each returned product will be set in the
+     *    `results.metadata` field in the prediction response. The given
+     *    'score' indicates the probability of an product being clicked/purchased
+     *    given the user's context and history.
+     * * `strictFiltering`: Boolean. True by default. If set to false, the service
+     *    will return generic (unfiltered) popular products instead of empty if
+     *    your filter blocks all prediction results.
+     * </pre>
+     *
+     * <code>map&lt;string, .google.protobuf.Value&gt; params = 7;</code>
+     */
+    public Builder removeParams(java.lang.String key) {
+      if (key == null) {
+        throw new java.lang.NullPointerException();
+      }
+      internalGetMutableParams().getMutableMap().remove(key);
+      return this;
+    }
+    /** Use alternate mutation accessors instead. */
+    @java.lang.Deprecated
+    public java.util.Map<java.lang.String, com.google.protobuf.Value> getMutableParams() {
+      return internalGetMutableParams().getMutableMap();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Additional domain specific parameters for the predictions.
+     * Allowed values:
+     * * `returnProduct`: Boolean. If set to true, the associated product
+     *    object will be returned in the `results.metadata` field in the
+     *    prediction response.
+     * * `returnScore`: Boolean. If set to true, the prediction 'score'
+     *    corresponding to each returned product will be set in the
+     *    `results.metadata` field in the prediction response. The given
+     *    'score' indicates the probability of an product being clicked/purchased
+     *    given the user's context and history.
+     * * `strictFiltering`: Boolean. True by default. If set to false, the service
+     *    will return generic (unfiltered) popular products instead of empty if
+     *    your filter blocks all prediction results.
+     * </pre>
+     *
+     * <code>map&lt;string, .google.protobuf.Value&gt; params = 7;</code>
+     */
+    public Builder putParams(java.lang.String key, com.google.protobuf.Value value) {
+      if (key == null) {
+        throw new java.lang.NullPointerException();
+      }
+      if (value == null) {
+        throw new java.lang.NullPointerException();
+      }
+      internalGetMutableParams().getMutableMap().put(key, value);
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Additional domain specific parameters for the predictions.
+     * Allowed values:
+     * * `returnProduct`: Boolean. If set to true, the associated product
+     *    object will be returned in the `results.metadata` field in the
+     *    prediction response.
+     * * `returnScore`: Boolean. If set to true, the prediction 'score'
+     *    corresponding to each returned product will be set in the
+     *    `results.metadata` field in the prediction response. The given
+     *    'score' indicates the probability of an product being clicked/purchased
+     *    given the user's context and history.
+     * * `strictFiltering`: Boolean. True by default. If set to false, the service
+     *    will return generic (unfiltered) popular products instead of empty if
+     *    your filter blocks all prediction results.
+     * </pre>
+     *
+     * <code>map&lt;string, .google.protobuf.Value&gt; params = 7;</code>
+     */
+    public Builder putAllParams(java.util.Map<java.lang.String, com.google.protobuf.Value> values) {
+      internalGetMutableParams().getMutableMap().putAll(values);
+      return this;
+    }
+
+    private com.google.protobuf.MapField<java.lang.String, java.lang.String> labels_;
+
+    private com.google.protobuf.MapField<java.lang.String, java.lang.String> internalGetLabels() {
+      if (labels_ == null) {
+        return com.google.protobuf.MapField.emptyMapField(LabelsDefaultEntryHolder.defaultEntry);
+      }
+      return labels_;
+    }
+
+    private com.google.protobuf.MapField<java.lang.String, java.lang.String>
+        internalGetMutableLabels() {
+      onChanged();
+      ;
+      if (labels_ == null) {
+        labels_ = com.google.protobuf.MapField.newMapField(LabelsDefaultEntryHolder.defaultEntry);
+      }
+      if (!labels_.isMutable()) {
+        labels_ = labels_.copy();
+      }
+      return labels_;
+    }
+
+    public int getLabelsCount() {
+      return internalGetLabels().getMap().size();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The labels for the predict request.
+     *  * Label keys can contain lowercase letters, digits and hyphens, must start
+     *    with a letter, and must end with a letter or digit.
+     *  * Non-zero label values can contain lowercase letters, digits and hyphens,
+     *    must start with a letter, and must end with a letter or digit.
+     *  * No more than 64 labels can be associated with a given request.
+     * See https://goo.gl/xmQnxf for more information on and examples of labels.
+     * </pre>
+     *
+     * <code>map&lt;string, string&gt; labels = 8;</code>
+     */
+    @java.lang.Override
+    public boolean containsLabels(java.lang.String key) {
+      if (key == null) {
+        throw new java.lang.NullPointerException();
+      }
+      return internalGetLabels().getMap().containsKey(key);
+    }
+    /** Use {@link #getLabelsMap()} instead. */
+    @java.lang.Override
+    @java.lang.Deprecated
+    public java.util.Map<java.lang.String, java.lang.String> getLabels() {
+      return getLabelsMap();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The labels for the predict request.
+     *  * Label keys can contain lowercase letters, digits and hyphens, must start
+     *    with a letter, and must end with a letter or digit.
+     *  * Non-zero label values can contain lowercase letters, digits and hyphens,
+     *    must start with a letter, and must end with a letter or digit.
+     *  * No more than 64 labels can be associated with a given request.
+     * See https://goo.gl/xmQnxf for more information on and examples of labels.
+     * </pre>
+     *
+     * <code>map&lt;string, string&gt; labels = 8;</code>
+     */
+    @java.lang.Override
+    public java.util.Map<java.lang.String, java.lang.String> getLabelsMap() {
+      return internalGetLabels().getMap();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The labels for the predict request.
+     *  * Label keys can contain lowercase letters, digits and hyphens, must start
+     *    with a letter, and must end with a letter or digit.
+     *  * Non-zero label values can contain lowercase letters, digits and hyphens,
+     *    must start with a letter, and must end with a letter or digit.
+     *  * No more than 64 labels can be associated with a given request.
+     * See https://goo.gl/xmQnxf for more information on and examples of labels.
+     * </pre>
+     *
+     * <code>map&lt;string, string&gt; labels = 8;</code>
+     */
+    @java.lang.Override
+    public java.lang.String getLabelsOrDefault(
+        java.lang.String key, java.lang.String defaultValue) {
+      if (key == null) {
+        throw new java.lang.NullPointerException();
+      }
+      java.util.Map<java.lang.String, java.lang.String> map = internalGetLabels().getMap();
+      return map.containsKey(key) ? map.get(key) : defaultValue;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The labels for the predict request.
+     *  * Label keys can contain lowercase letters, digits and hyphens, must start
+     *    with a letter, and must end with a letter or digit.
+     *  * Non-zero label values can contain lowercase letters, digits and hyphens,
+     *    must start with a letter, and must end with a letter or digit.
+     *  * No more than 64 labels can be associated with a given request.
+     * See https://goo.gl/xmQnxf for more information on and examples of labels.
+     * </pre>
+     *
+     * <code>map&lt;string, string&gt; labels = 8;</code>
+     */
+    @java.lang.Override
+    public java.lang.String getLabelsOrThrow(java.lang.String key) {
+      if (key == null) {
+        throw new java.lang.NullPointerException();
+      }
+      java.util.Map<java.lang.String, java.lang.String> map = internalGetLabels().getMap();
+      if (!map.containsKey(key)) {
+        throw new java.lang.IllegalArgumentException();
+      }
+      return map.get(key);
+    }
+
+    public Builder clearLabels() {
+      internalGetMutableLabels().getMutableMap().clear();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The labels for the predict request.
+     *  * Label keys can contain lowercase letters, digits and hyphens, must start
+     *    with a letter, and must end with a letter or digit.
+     *  * Non-zero label values can contain lowercase letters, digits and hyphens,
+     *    must start with a letter, and must end with a letter or digit.
+     *  * No more than 64 labels can be associated with a given request.
+     * See https://goo.gl/xmQnxf for more information on and examples of labels.
+     * </pre>
+     *
+     * <code>map&lt;string, string&gt; labels = 8;</code>
+     */
+    public Builder removeLabels(java.lang.String key) {
+      if (key == null) {
+        throw new java.lang.NullPointerException();
+      }
+      internalGetMutableLabels().getMutableMap().remove(key);
+      return this;
+    }
+    /** Use alternate mutation accessors instead. */
+    @java.lang.Deprecated
+    public java.util.Map<java.lang.String, java.lang.String> getMutableLabels() {
+      return internalGetMutableLabels().getMutableMap();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The labels for the predict request.
+     *  * Label keys can contain lowercase letters, digits and hyphens, must start
+     *    with a letter, and must end with a letter or digit.
+     *  * Non-zero label values can contain lowercase letters, digits and hyphens,
+     *    must start with a letter, and must end with a letter or digit.
+     *  * No more than 64 labels can be associated with a given request.
+     * See https://goo.gl/xmQnxf for more information on and examples of labels.
+     * </pre>
+     *
+     * <code>map&lt;string, string&gt; labels = 8;</code>
+     */
+    public Builder putLabels(java.lang.String key, java.lang.String value) {
+      if (key == null) {
+        throw new java.lang.NullPointerException();
+      }
+      if (value == null) {
+        throw new java.lang.NullPointerException();
+      }
+      internalGetMutableLabels().getMutableMap().put(key, value);
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The labels for the predict request.
+     *  * Label keys can contain lowercase letters, digits and hyphens, must start
+     *    with a letter, and must end with a letter or digit.
+     *  * Non-zero label values can contain lowercase letters, digits and hyphens,
+     *    must start with a letter, and must end with a letter or digit.
+     *  * No more than 64 labels can be associated with a given request.
+     * See https://goo.gl/xmQnxf for more information on and examples of labels.
+     * </pre>
+     *
+     * <code>map&lt;string, string&gt; labels = 8;</code>
+     */
+    public Builder putAllLabels(java.util.Map<java.lang.String, java.lang.String> values) {
+      internalGetMutableLabels().getMutableMap().putAll(values);
+      return this;
+    }
+
+    @java.lang.Override
+    public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.setUnknownFields(unknownFields);
+    }
+
+    @java.lang.Override
+    public final Builder mergeUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.mergeUnknownFields(unknownFields);
+    }
+
+    // @@protoc_insertion_point(builder_scope:google.cloud.retail.v2.PredictRequest)
+  }
+
+  // @@protoc_insertion_point(class_scope:google.cloud.retail.v2.PredictRequest)
+  private static final com.google.cloud.retail.v2.PredictRequest DEFAULT_INSTANCE;
+
+  static {
+    DEFAULT_INSTANCE = new com.google.cloud.retail.v2.PredictRequest();
+  }
+
+  public static com.google.cloud.retail.v2.PredictRequest getDefaultInstance() {
+    return DEFAULT_INSTANCE;
+  }
+
+  private static final com.google.protobuf.Parser<PredictRequest> PARSER =
+      new com.google.protobuf.AbstractParser<PredictRequest>() {
+        @java.lang.Override
+        public PredictRequest parsePartialFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws com.google.protobuf.InvalidProtocolBufferException {
+          return new PredictRequest(input, extensionRegistry);
+        }
+      };
+
+  public static com.google.protobuf.Parser<PredictRequest> parser() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.protobuf.Parser<PredictRequest> getParserForType() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.cloud.retail.v2.PredictRequest getDefaultInstanceForType() {
+    return DEFAULT_INSTANCE;
+  }
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/PredictRequestOrBuilder.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/PredictRequestOrBuilder.java
new file mode 100644
index 00000000..fad4018b
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/PredictRequestOrBuilder.java
@@ -0,0 +1,459 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/prediction_service.proto
+
+package com.google.cloud.retail.v2;
+
+public interface PredictRequestOrBuilder
+    extends
+    // @@protoc_insertion_point(interface_extends:google.cloud.retail.v2.PredictRequest)
+    com.google.protobuf.MessageOrBuilder {
+
+  /**
+   *
+   *
+   * <pre>
+   * Required. Full resource name of the format:
+   * {name=projects/&#42;&#47;locations/global/catalogs/default_catalog/placements/&#42;}
+   * The id of the recommendation engine placement. This id is used to identify
+   * the set of models that will be used to make the prediction.
+   * We currently support three placements with the following IDs by default:
+   * * `shopping_cart`: Predicts products frequently bought together with one or
+   *   more  products in the same shopping session. Commonly displayed after
+   *   `add-to-cart` events, on product detail pages, or on the shopping cart
+   *   page.
+   * * `home_page`: Predicts the next product that a user will most likely
+   *   engage with or purchase based on the shopping or viewing history of the
+   *   specified `userId` or `visitorId`. For example - Recommendations for you.
+   * * `product_detail`: Predicts the next product that a user will most likely
+   *   engage with or purchase. The prediction is based on the shopping or
+   *   viewing history of the specified `userId` or `visitorId` and its
+   *   relevance to a specified `CatalogItem`. Typically used on product detail
+   *   pages. For example - More products like this.
+   * * `recently_viewed_default`: Returns up to 75 products recently viewed by
+   *   the specified `userId` or `visitorId`, most recent ones first. Returns
+   *   nothing if neither of them has viewed any products yet. For example -
+   *   Recently viewed.
+   * The full list of available placements can be seen at
+   * https://console.cloud.google.com/recommendation/catalogs/default_catalog/placements
+   * </pre>
+   *
+   * <code>string placement = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The placement.
+   */
+  java.lang.String getPlacement();
+  /**
+   *
+   *
+   * <pre>
+   * Required. Full resource name of the format:
+   * {name=projects/&#42;&#47;locations/global/catalogs/default_catalog/placements/&#42;}
+   * The id of the recommendation engine placement. This id is used to identify
+   * the set of models that will be used to make the prediction.
+   * We currently support three placements with the following IDs by default:
+   * * `shopping_cart`: Predicts products frequently bought together with one or
+   *   more  products in the same shopping session. Commonly displayed after
+   *   `add-to-cart` events, on product detail pages, or on the shopping cart
+   *   page.
+   * * `home_page`: Predicts the next product that a user will most likely
+   *   engage with or purchase based on the shopping or viewing history of the
+   *   specified `userId` or `visitorId`. For example - Recommendations for you.
+   * * `product_detail`: Predicts the next product that a user will most likely
+   *   engage with or purchase. The prediction is based on the shopping or
+   *   viewing history of the specified `userId` or `visitorId` and its
+   *   relevance to a specified `CatalogItem`. Typically used on product detail
+   *   pages. For example - More products like this.
+   * * `recently_viewed_default`: Returns up to 75 products recently viewed by
+   *   the specified `userId` or `visitorId`, most recent ones first. Returns
+   *   nothing if neither of them has viewed any products yet. For example -
+   *   Recently viewed.
+   * The full list of available placements can be seen at
+   * https://console.cloud.google.com/recommendation/catalogs/default_catalog/placements
+   * </pre>
+   *
+   * <code>string placement = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The bytes for placement.
+   */
+  com.google.protobuf.ByteString getPlacementBytes();
+
+  /**
+   *
+   *
+   * <pre>
+   * Required. Context about the user, what they are looking at and what action
+   * they took to trigger the predict request. Note that this user event detail
+   * won't be ingested to userEvent logs. Thus, a separate userEvent write
+   * request is required for event logging.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.retail.v2.UserEvent user_event = 2 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   *
+   * @return Whether the userEvent field is set.
+   */
+  boolean hasUserEvent();
+  /**
+   *
+   *
+   * <pre>
+   * Required. Context about the user, what they are looking at and what action
+   * they took to trigger the predict request. Note that this user event detail
+   * won't be ingested to userEvent logs. Thus, a separate userEvent write
+   * request is required for event logging.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.retail.v2.UserEvent user_event = 2 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   *
+   * @return The userEvent.
+   */
+  com.google.cloud.retail.v2.UserEvent getUserEvent();
+  /**
+   *
+   *
+   * <pre>
+   * Required. Context about the user, what they are looking at and what action
+   * they took to trigger the predict request. Note that this user event detail
+   * won't be ingested to userEvent logs. Thus, a separate userEvent write
+   * request is required for event logging.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.retail.v2.UserEvent user_event = 2 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   */
+  com.google.cloud.retail.v2.UserEventOrBuilder getUserEventOrBuilder();
+
+  /**
+   *
+   *
+   * <pre>
+   * Maximum number of results to return per page. Set this property
+   * to the number of prediction results needed. If zero, the service will
+   * choose a reasonable default. The maximum allowed value is 100. Values
+   * above 100 will be coerced to 100.
+   * </pre>
+   *
+   * <code>int32 page_size = 3;</code>
+   *
+   * @return The pageSize.
+   */
+  int getPageSize();
+
+  /**
+   *
+   *
+   * <pre>
+   * The previous PredictResponse.next_page_token.
+   * </pre>
+   *
+   * <code>string page_token = 4;</code>
+   *
+   * @return The pageToken.
+   */
+  java.lang.String getPageToken();
+  /**
+   *
+   *
+   * <pre>
+   * The previous PredictResponse.next_page_token.
+   * </pre>
+   *
+   * <code>string page_token = 4;</code>
+   *
+   * @return The bytes for pageToken.
+   */
+  com.google.protobuf.ByteString getPageTokenBytes();
+
+  /**
+   *
+   *
+   * <pre>
+   * Filter for restricting prediction results with a length limit of 5,000
+   * characters. Accepts values for tags and the `filterOutOfStockItems` flag.
+   *  * Tag expressions. Restricts predictions to products that match all of the
+   *    specified tags. Boolean operators `OR` and `NOT` are supported if the
+   *    expression is enclosed in parentheses, and must be separated from the
+   *    tag values by a space. `-"tagA"` is also supported and is equivalent to
+   *    `NOT "tagA"`. Tag values must be double quoted UTF-8 encoded strings
+   *    with a size limit of 1,000 characters.
+   *  * filterOutOfStockItems. Restricts predictions to products that do not
+   *  have a
+   *    stockState value of OUT_OF_STOCK.
+   * Examples:
+   *  * tag=("Red" OR "Blue") tag="New-Arrival" tag=(NOT "promotional")
+   *  * filterOutOfStockItems  tag=(-"promotional")
+   *  * filterOutOfStockItems
+   * If your filter blocks all prediction results, nothing will be returned. If
+   * you want generic (unfiltered) popular products to be returned instead, set
+   * `strictFiltering` to false in `PredictRequest.params`.
+   * </pre>
+   *
+   * <code>string filter = 5;</code>
+   *
+   * @return The filter.
+   */
+  java.lang.String getFilter();
+  /**
+   *
+   *
+   * <pre>
+   * Filter for restricting prediction results with a length limit of 5,000
+   * characters. Accepts values for tags and the `filterOutOfStockItems` flag.
+   *  * Tag expressions. Restricts predictions to products that match all of the
+   *    specified tags. Boolean operators `OR` and `NOT` are supported if the
+   *    expression is enclosed in parentheses, and must be separated from the
+   *    tag values by a space. `-"tagA"` is also supported and is equivalent to
+   *    `NOT "tagA"`. Tag values must be double quoted UTF-8 encoded strings
+   *    with a size limit of 1,000 characters.
+   *  * filterOutOfStockItems. Restricts predictions to products that do not
+   *  have a
+   *    stockState value of OUT_OF_STOCK.
+   * Examples:
+   *  * tag=("Red" OR "Blue") tag="New-Arrival" tag=(NOT "promotional")
+   *  * filterOutOfStockItems  tag=(-"promotional")
+   *  * filterOutOfStockItems
+   * If your filter blocks all prediction results, nothing will be returned. If
+   * you want generic (unfiltered) popular products to be returned instead, set
+   * `strictFiltering` to false in `PredictRequest.params`.
+   * </pre>
+   *
+   * <code>string filter = 5;</code>
+   *
+   * @return The bytes for filter.
+   */
+  com.google.protobuf.ByteString getFilterBytes();
+
+  /**
+   *
+   *
+   * <pre>
+   * Use validate only mode for this prediction query. If set to true, a
+   * dummy model will be used that returns arbitrary products.
+   * Note that the validate only mode should only be used for testing the API,
+   * or if the model is not ready.
+   * </pre>
+   *
+   * <code>bool validate_only = 6;</code>
+   *
+   * @return The validateOnly.
+   */
+  boolean getValidateOnly();
+
+  /**
+   *
+   *
+   * <pre>
+   * Additional domain specific parameters for the predictions.
+   * Allowed values:
+   * * `returnProduct`: Boolean. If set to true, the associated product
+   *    object will be returned in the `results.metadata` field in the
+   *    prediction response.
+   * * `returnScore`: Boolean. If set to true, the prediction 'score'
+   *    corresponding to each returned product will be set in the
+   *    `results.metadata` field in the prediction response. The given
+   *    'score' indicates the probability of an product being clicked/purchased
+   *    given the user's context and history.
+   * * `strictFiltering`: Boolean. True by default. If set to false, the service
+   *    will return generic (unfiltered) popular products instead of empty if
+   *    your filter blocks all prediction results.
+   * </pre>
+   *
+   * <code>map&lt;string, .google.protobuf.Value&gt; params = 7;</code>
+   */
+  int getParamsCount();
+  /**
+   *
+   *
+   * <pre>
+   * Additional domain specific parameters for the predictions.
+   * Allowed values:
+   * * `returnProduct`: Boolean. If set to true, the associated product
+   *    object will be returned in the `results.metadata` field in the
+   *    prediction response.
+   * * `returnScore`: Boolean. If set to true, the prediction 'score'
+   *    corresponding to each returned product will be set in the
+   *    `results.metadata` field in the prediction response. The given
+   *    'score' indicates the probability of an product being clicked/purchased
+   *    given the user's context and history.
+   * * `strictFiltering`: Boolean. True by default. If set to false, the service
+   *    will return generic (unfiltered) popular products instead of empty if
+   *    your filter blocks all prediction results.
+   * </pre>
+   *
+   * <code>map&lt;string, .google.protobuf.Value&gt; params = 7;</code>
+   */
+  boolean containsParams(java.lang.String key);
+  /** Use {@link #getParamsMap()} instead. */
+  @java.lang.Deprecated
+  java.util.Map<java.lang.String, com.google.protobuf.Value> getParams();
+  /**
+   *
+   *
+   * <pre>
+   * Additional domain specific parameters for the predictions.
+   * Allowed values:
+   * * `returnProduct`: Boolean. If set to true, the associated product
+   *    object will be returned in the `results.metadata` field in the
+   *    prediction response.
+   * * `returnScore`: Boolean. If set to true, the prediction 'score'
+   *    corresponding to each returned product will be set in the
+   *    `results.metadata` field in the prediction response. The given
+   *    'score' indicates the probability of an product being clicked/purchased
+   *    given the user's context and history.
+   * * `strictFiltering`: Boolean. True by default. If set to false, the service
+   *    will return generic (unfiltered) popular products instead of empty if
+   *    your filter blocks all prediction results.
+   * </pre>
+   *
+   * <code>map&lt;string, .google.protobuf.Value&gt; params = 7;</code>
+   */
+  java.util.Map<java.lang.String, com.google.protobuf.Value> getParamsMap();
+  /**
+   *
+   *
+   * <pre>
+   * Additional domain specific parameters for the predictions.
+   * Allowed values:
+   * * `returnProduct`: Boolean. If set to true, the associated product
+   *    object will be returned in the `results.metadata` field in the
+   *    prediction response.
+   * * `returnScore`: Boolean. If set to true, the prediction 'score'
+   *    corresponding to each returned product will be set in the
+   *    `results.metadata` field in the prediction response. The given
+   *    'score' indicates the probability of an product being clicked/purchased
+   *    given the user's context and history.
+   * * `strictFiltering`: Boolean. True by default. If set to false, the service
+   *    will return generic (unfiltered) popular products instead of empty if
+   *    your filter blocks all prediction results.
+   * </pre>
+   *
+   * <code>map&lt;string, .google.protobuf.Value&gt; params = 7;</code>
+   */
+  com.google.protobuf.Value getParamsOrDefault(
+      java.lang.String key, com.google.protobuf.Value defaultValue);
+  /**
+   *
+   *
+   * <pre>
+   * Additional domain specific parameters for the predictions.
+   * Allowed values:
+   * * `returnProduct`: Boolean. If set to true, the associated product
+   *    object will be returned in the `results.metadata` field in the
+   *    prediction response.
+   * * `returnScore`: Boolean. If set to true, the prediction 'score'
+   *    corresponding to each returned product will be set in the
+   *    `results.metadata` field in the prediction response. The given
+   *    'score' indicates the probability of an product being clicked/purchased
+   *    given the user's context and history.
+   * * `strictFiltering`: Boolean. True by default. If set to false, the service
+   *    will return generic (unfiltered) popular products instead of empty if
+   *    your filter blocks all prediction results.
+   * </pre>
+   *
+   * <code>map&lt;string, .google.protobuf.Value&gt; params = 7;</code>
+   */
+  com.google.protobuf.Value getParamsOrThrow(java.lang.String key);
+
+  /**
+   *
+   *
+   * <pre>
+   * The labels for the predict request.
+   *  * Label keys can contain lowercase letters, digits and hyphens, must start
+   *    with a letter, and must end with a letter or digit.
+   *  * Non-zero label values can contain lowercase letters, digits and hyphens,
+   *    must start with a letter, and must end with a letter or digit.
+   *  * No more than 64 labels can be associated with a given request.
+   * See https://goo.gl/xmQnxf for more information on and examples of labels.
+   * </pre>
+   *
+   * <code>map&lt;string, string&gt; labels = 8;</code>
+   */
+  int getLabelsCount();
+  /**
+   *
+   *
+   * <pre>
+   * The labels for the predict request.
+   *  * Label keys can contain lowercase letters, digits and hyphens, must start
+   *    with a letter, and must end with a letter or digit.
+   *  * Non-zero label values can contain lowercase letters, digits and hyphens,
+   *    must start with a letter, and must end with a letter or digit.
+   *  * No more than 64 labels can be associated with a given request.
+   * See https://goo.gl/xmQnxf for more information on and examples of labels.
+   * </pre>
+   *
+   * <code>map&lt;string, string&gt; labels = 8;</code>
+   */
+  boolean containsLabels(java.lang.String key);
+  /** Use {@link #getLabelsMap()} instead. */
+  @java.lang.Deprecated
+  java.util.Map<java.lang.String, java.lang.String> getLabels();
+  /**
+   *
+   *
+   * <pre>
+   * The labels for the predict request.
+   *  * Label keys can contain lowercase letters, digits and hyphens, must start
+   *    with a letter, and must end with a letter or digit.
+   *  * Non-zero label values can contain lowercase letters, digits and hyphens,
+   *    must start with a letter, and must end with a letter or digit.
+   *  * No more than 64 labels can be associated with a given request.
+   * See https://goo.gl/xmQnxf for more information on and examples of labels.
+   * </pre>
+   *
+   * <code>map&lt;string, string&gt; labels = 8;</code>
+   */
+  java.util.Map<java.lang.String, java.lang.String> getLabelsMap();
+  /**
+   *
+   *
+   * <pre>
+   * The labels for the predict request.
+   *  * Label keys can contain lowercase letters, digits and hyphens, must start
+   *    with a letter, and must end with a letter or digit.
+   *  * Non-zero label values can contain lowercase letters, digits and hyphens,
+   *    must start with a letter, and must end with a letter or digit.
+   *  * No more than 64 labels can be associated with a given request.
+   * See https://goo.gl/xmQnxf for more information on and examples of labels.
+   * </pre>
+   *
+   * <code>map&lt;string, string&gt; labels = 8;</code>
+   */
+  java.lang.String getLabelsOrDefault(java.lang.String key, java.lang.String defaultValue);
+  /**
+   *
+   *
+   * <pre>
+   * The labels for the predict request.
+   *  * Label keys can contain lowercase letters, digits and hyphens, must start
+   *    with a letter, and must end with a letter or digit.
+   *  * Non-zero label values can contain lowercase letters, digits and hyphens,
+   *    must start with a letter, and must end with a letter or digit.
+   *  * No more than 64 labels can be associated with a given request.
+   * See https://goo.gl/xmQnxf for more information on and examples of labels.
+   * </pre>
+   *
+   * <code>map&lt;string, string&gt; labels = 8;</code>
+   */
+  java.lang.String getLabelsOrThrow(java.lang.String key);
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/PredictResponse.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/PredictResponse.java
new file mode 100644
index 00000000..ad7156d8
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/PredictResponse.java
@@ -0,0 +1,2689 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/prediction_service.proto
+
+package com.google.cloud.retail.v2;
+
+/**
+ *
+ *
+ * <pre>
+ * Response message for predict method.
+ * </pre>
+ *
+ * Protobuf type {@code google.cloud.retail.v2.PredictResponse}
+ */
+public final class PredictResponse extends com.google.protobuf.GeneratedMessageV3
+    implements
+    // @@protoc_insertion_point(message_implements:google.cloud.retail.v2.PredictResponse)
+    PredictResponseOrBuilder {
+  private static final long serialVersionUID = 0L;
+  // Use PredictResponse.newBuilder() to construct.
+  private PredictResponse(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+    super(builder);
+  }
+
+  private PredictResponse() {
+    results_ = java.util.Collections.emptyList();
+    attributionToken_ = "";
+    missingIds_ = com.google.protobuf.LazyStringArrayList.EMPTY;
+  }
+
+  @java.lang.Override
+  @SuppressWarnings({"unused"})
+  protected java.lang.Object newInstance(UnusedPrivateParameter unused) {
+    return new PredictResponse();
+  }
+
+  @java.lang.Override
+  public final com.google.protobuf.UnknownFieldSet getUnknownFields() {
+    return this.unknownFields;
+  }
+
+  private PredictResponse(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    this();
+    if (extensionRegistry == null) {
+      throw new java.lang.NullPointerException();
+    }
+    int mutable_bitField0_ = 0;
+    com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+        com.google.protobuf.UnknownFieldSet.newBuilder();
+    try {
+      boolean done = false;
+      while (!done) {
+        int tag = input.readTag();
+        switch (tag) {
+          case 0:
+            done = true;
+            break;
+          case 10:
+            {
+              if (!((mutable_bitField0_ & 0x00000001) != 0)) {
+                results_ =
+                    new java.util.ArrayList<
+                        com.google.cloud.retail.v2.PredictResponse.PredictionResult>();
+                mutable_bitField0_ |= 0x00000001;
+              }
+              results_.add(
+                  input.readMessage(
+                      com.google.cloud.retail.v2.PredictResponse.PredictionResult.parser(),
+                      extensionRegistry));
+              break;
+            }
+          case 18:
+            {
+              java.lang.String s = input.readStringRequireUtf8();
+
+              attributionToken_ = s;
+              break;
+            }
+          case 26:
+            {
+              java.lang.String s = input.readStringRequireUtf8();
+              if (!((mutable_bitField0_ & 0x00000002) != 0)) {
+                missingIds_ = new com.google.protobuf.LazyStringArrayList();
+                mutable_bitField0_ |= 0x00000002;
+              }
+              missingIds_.add(s);
+              break;
+            }
+          case 32:
+            {
+              validateOnly_ = input.readBool();
+              break;
+            }
+          default:
+            {
+              if (!parseUnknownField(input, unknownFields, extensionRegistry, tag)) {
+                done = true;
+              }
+              break;
+            }
+        }
+      }
+    } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+      throw e.setUnfinishedMessage(this);
+    } catch (java.io.IOException e) {
+      throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
+    } finally {
+      if (((mutable_bitField0_ & 0x00000001) != 0)) {
+        results_ = java.util.Collections.unmodifiableList(results_);
+      }
+      if (((mutable_bitField0_ & 0x00000002) != 0)) {
+        missingIds_ = missingIds_.getUnmodifiableView();
+      }
+      this.unknownFields = unknownFields.build();
+      makeExtensionsImmutable();
+    }
+  }
+
+  public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+    return com.google.cloud.retail.v2.PredictionServiceProto
+        .internal_static_google_cloud_retail_v2_PredictResponse_descriptor;
+  }
+
+  @java.lang.Override
+  protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internalGetFieldAccessorTable() {
+    return com.google.cloud.retail.v2.PredictionServiceProto
+        .internal_static_google_cloud_retail_v2_PredictResponse_fieldAccessorTable
+        .ensureFieldAccessorsInitialized(
+            com.google.cloud.retail.v2.PredictResponse.class,
+            com.google.cloud.retail.v2.PredictResponse.Builder.class);
+  }
+
+  public interface PredictionResultOrBuilder
+      extends
+      // @@protoc_insertion_point(interface_extends:google.cloud.retail.v2.PredictResponse.PredictionResult)
+      com.google.protobuf.MessageOrBuilder {
+
+    /**
+     *
+     *
+     * <pre>
+     * ID of the recommended product
+     * </pre>
+     *
+     * <code>string id = 1;</code>
+     *
+     * @return The id.
+     */
+    java.lang.String getId();
+    /**
+     *
+     *
+     * <pre>
+     * ID of the recommended product
+     * </pre>
+     *
+     * <code>string id = 1;</code>
+     *
+     * @return The bytes for id.
+     */
+    com.google.protobuf.ByteString getIdBytes();
+
+    /**
+     *
+     *
+     * <pre>
+     * Additional product metadata / annotations.
+     * Possible values:
+     * * `product`: JSON representation of the product. Will be set if
+     *   `returnProduct` is set to true in `PredictRequest.params`.
+     * * `score`: Prediction score in double value. Will be set if
+     *   `returnScore` is set to true in `PredictRequest.params`.
+     * </pre>
+     *
+     * <code>map&lt;string, .google.protobuf.Value&gt; metadata = 2;</code>
+     */
+    int getMetadataCount();
+    /**
+     *
+     *
+     * <pre>
+     * Additional product metadata / annotations.
+     * Possible values:
+     * * `product`: JSON representation of the product. Will be set if
+     *   `returnProduct` is set to true in `PredictRequest.params`.
+     * * `score`: Prediction score in double value. Will be set if
+     *   `returnScore` is set to true in `PredictRequest.params`.
+     * </pre>
+     *
+     * <code>map&lt;string, .google.protobuf.Value&gt; metadata = 2;</code>
+     */
+    boolean containsMetadata(java.lang.String key);
+    /** Use {@link #getMetadataMap()} instead. */
+    @java.lang.Deprecated
+    java.util.Map<java.lang.String, com.google.protobuf.Value> getMetadata();
+    /**
+     *
+     *
+     * <pre>
+     * Additional product metadata / annotations.
+     * Possible values:
+     * * `product`: JSON representation of the product. Will be set if
+     *   `returnProduct` is set to true in `PredictRequest.params`.
+     * * `score`: Prediction score in double value. Will be set if
+     *   `returnScore` is set to true in `PredictRequest.params`.
+     * </pre>
+     *
+     * <code>map&lt;string, .google.protobuf.Value&gt; metadata = 2;</code>
+     */
+    java.util.Map<java.lang.String, com.google.protobuf.Value> getMetadataMap();
+    /**
+     *
+     *
+     * <pre>
+     * Additional product metadata / annotations.
+     * Possible values:
+     * * `product`: JSON representation of the product. Will be set if
+     *   `returnProduct` is set to true in `PredictRequest.params`.
+     * * `score`: Prediction score in double value. Will be set if
+     *   `returnScore` is set to true in `PredictRequest.params`.
+     * </pre>
+     *
+     * <code>map&lt;string, .google.protobuf.Value&gt; metadata = 2;</code>
+     */
+    com.google.protobuf.Value getMetadataOrDefault(
+        java.lang.String key, com.google.protobuf.Value defaultValue);
+    /**
+     *
+     *
+     * <pre>
+     * Additional product metadata / annotations.
+     * Possible values:
+     * * `product`: JSON representation of the product. Will be set if
+     *   `returnProduct` is set to true in `PredictRequest.params`.
+     * * `score`: Prediction score in double value. Will be set if
+     *   `returnScore` is set to true in `PredictRequest.params`.
+     * </pre>
+     *
+     * <code>map&lt;string, .google.protobuf.Value&gt; metadata = 2;</code>
+     */
+    com.google.protobuf.Value getMetadataOrThrow(java.lang.String key);
+  }
+  /**
+   *
+   *
+   * <pre>
+   * PredictionResult represents the recommendation prediction results.
+   * </pre>
+   *
+   * Protobuf type {@code google.cloud.retail.v2.PredictResponse.PredictionResult}
+   */
+  public static final class PredictionResult extends com.google.protobuf.GeneratedMessageV3
+      implements
+      // @@protoc_insertion_point(message_implements:google.cloud.retail.v2.PredictResponse.PredictionResult)
+      PredictionResultOrBuilder {
+    private static final long serialVersionUID = 0L;
+    // Use PredictionResult.newBuilder() to construct.
+    private PredictionResult(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+      super(builder);
+    }
+
+    private PredictionResult() {
+      id_ = "";
+    }
+
+    @java.lang.Override
+    @SuppressWarnings({"unused"})
+    protected java.lang.Object newInstance(UnusedPrivateParameter unused) {
+      return new PredictionResult();
+    }
+
+    @java.lang.Override
+    public final com.google.protobuf.UnknownFieldSet getUnknownFields() {
+      return this.unknownFields;
+    }
+
+    private PredictionResult(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      this();
+      if (extensionRegistry == null) {
+        throw new java.lang.NullPointerException();
+      }
+      int mutable_bitField0_ = 0;
+      com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+          com.google.protobuf.UnknownFieldSet.newBuilder();
+      try {
+        boolean done = false;
+        while (!done) {
+          int tag = input.readTag();
+          switch (tag) {
+            case 0:
+              done = true;
+              break;
+            case 10:
+              {
+                java.lang.String s = input.readStringRequireUtf8();
+
+                id_ = s;
+                break;
+              }
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+              {
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+                  metadata_ =
+                      com.google.protobuf.MapField.newMapField(
+                          MetadataDefaultEntryHolder.defaultEntry);
+                  mutable_bitField0_ |= 0x00000001;
+                }
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+                    metadata__ =
+                        input.readMessage(
+                            MetadataDefaultEntryHolder.defaultEntry.getParserForType(),
+                            extensionRegistry);
+                metadata_.getMutableMap().put(metadata__.getKey(), metadata__.getValue());
+                break;
+              }
+            default:
+              {
+                if (!parseUnknownField(input, unknownFields, extensionRegistry, tag)) {
+                  done = true;
+                }
+                break;
+              }
+          }
+        }
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        throw e.setUnfinishedMessage(this);
+      } catch (java.io.IOException e) {
+        throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
+      } finally {
+        this.unknownFields = unknownFields.build();
+        makeExtensionsImmutable();
+      }
+    }
+
+    public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+      return com.google.cloud.retail.v2.PredictionServiceProto
+          .internal_static_google_cloud_retail_v2_PredictResponse_PredictionResult_descriptor;
+    }
+
+    @SuppressWarnings({"rawtypes"})
+    @java.lang.Override
+    protected com.google.protobuf.MapField internalGetMapField(int number) {
+      switch (number) {
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+          return internalGetMetadata();
+        default:
+          throw new RuntimeException("Invalid map field number: " + number);
+      }
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return com.google.cloud.retail.v2.PredictionServiceProto
+          .internal_static_google_cloud_retail_v2_PredictResponse_PredictionResult_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
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+    }
+
+    public static final int ID_FIELD_NUMBER = 1;
+    private volatile java.lang.Object id_;
+    /**
+     *
+     *
+     * <pre>
+     * ID of the recommended product
+     * </pre>
+     *
+     * <code>string id = 1;</code>
+     *
+     * @return The id.
+     */
+    @java.lang.Override
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+        return s;
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+    /**
+     *
+     *
+     * <pre>
+     * ID of the recommended product
+     * </pre>
+     *
+     * <code>string id = 1;</code>
+     *
+     * @return The bytes for id.
+     */
+    @java.lang.Override
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+     *
+     *
+     * <pre>
+     * Additional product metadata / annotations.
+     * Possible values:
+     * * `product`: JSON representation of the product. Will be set if
+     *   `returnProduct` is set to true in `PredictRequest.params`.
+     * * `score`: Prediction score in double value. Will be set if
+     *   `returnScore` is set to true in `PredictRequest.params`.
+     * </pre>
+     *
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+      return getMetadataMap();
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+    /**
+     *
+     *
+     * <pre>
+     * Additional product metadata / annotations.
+     * Possible values:
+     * * `product`: JSON representation of the product. Will be set if
+     *   `returnProduct` is set to true in `PredictRequest.params`.
+     * * `score`: Prediction score in double value. Will be set if
+     *   `returnScore` is set to true in `PredictRequest.params`.
+     * </pre>
+     *
+     * <code>map&lt;string, .google.protobuf.Value&gt; metadata = 2;</code>
+     */
+    @java.lang.Override
+    public java.util.Map<java.lang.String, com.google.protobuf.Value> getMetadataMap() {
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+    }
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+     *
+     *
+     * <pre>
+     * Additional product metadata / annotations.
+     * Possible values:
+     * * `product`: JSON representation of the product. Will be set if
+     *   `returnProduct` is set to true in `PredictRequest.params`.
+     * * `score`: Prediction score in double value. Will be set if
+     *   `returnScore` is set to true in `PredictRequest.params`.
+     * </pre>
+     *
+     * <code>map&lt;string, .google.protobuf.Value&gt; metadata = 2;</code>
+     */
+    @java.lang.Override
+    public com.google.protobuf.Value getMetadataOrDefault(
+        java.lang.String key, com.google.protobuf.Value defaultValue) {
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+      return map.containsKey(key) ? map.get(key) : defaultValue;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Additional product metadata / annotations.
+     * Possible values:
+     * * `product`: JSON representation of the product. Will be set if
+     *   `returnProduct` is set to true in `PredictRequest.params`.
+     * * `score`: Prediction score in double value. Will be set if
+     *   `returnScore` is set to true in `PredictRequest.params`.
+     * </pre>
+     *
+     * <code>map&lt;string, .google.protobuf.Value&gt; metadata = 2;</code>
+     */
+    @java.lang.Override
+    public com.google.protobuf.Value getMetadataOrThrow(java.lang.String key) {
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+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
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+    /**
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+     *
+     * <pre>
+     * PredictionResult represents the recommendation prediction results.
+     * </pre>
+     *
+     * Protobuf type {@code google.cloud.retail.v2.PredictResponse.PredictionResult}
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+        internalGetMutableMetadata().clear();
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+      @java.lang.Override
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+      public Builder mergeFrom(com.google.cloud.retail.v2.PredictResponse.PredictionResult other) {
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+       *
+       *
+       * <pre>
+       * Additional product metadata / annotations.
+       * Possible values:
+       * * `product`: JSON representation of the product. Will be set if
+       *   `returnProduct` is set to true in `PredictRequest.params`.
+       * * `score`: Prediction score in double value. Will be set if
+       *   `returnScore` is set to true in `PredictRequest.params`.
+       * </pre>
+       *
+       * <code>map&lt;string, .google.protobuf.Value&gt; metadata = 2;</code>
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+       * Additional product metadata / annotations.
+       * Possible values:
+       * * `product`: JSON representation of the product. Will be set if
+       *   `returnProduct` is set to true in `PredictRequest.params`.
+       * * `score`: Prediction score in double value. Will be set if
+       *   `returnScore` is set to true in `PredictRequest.params`.
+       * </pre>
+       *
+       * <code>map&lt;string, .google.protobuf.Value&gt; metadata = 2;</code>
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+       *
+       * <pre>
+       * Additional product metadata / annotations.
+       * Possible values:
+       * * `product`: JSON representation of the product. Will be set if
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+       * * `score`: Prediction score in double value. Will be set if
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+       * </pre>
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+       *
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+       * Additional product metadata / annotations.
+       * Possible values:
+       * * `product`: JSON representation of the product. Will be set if
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+       * * `score`: Prediction score in double value. Will be set if
+       *   `returnScore` is set to true in `PredictRequest.params`.
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+       * Additional product metadata / annotations.
+       * Possible values:
+       * * `product`: JSON representation of the product. Will be set if
+       *   `returnProduct` is set to true in `PredictRequest.params`.
+       * * `score`: Prediction score in double value. Will be set if
+       *   `returnScore` is set to true in `PredictRequest.params`.
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+       * Additional product metadata / annotations.
+       * Possible values:
+       * * `product`: JSON representation of the product. Will be set if
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+       * * `score`: Prediction score in double value. Will be set if
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+       * Additional product metadata / annotations.
+       * Possible values:
+       * * `product`: JSON representation of the product. Will be set if
+       *   `returnProduct` is set to true in `PredictRequest.params`.
+       * * `score`: Prediction score in double value. Will be set if
+       *   `returnScore` is set to true in `PredictRequest.params`.
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+       *
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+      public Builder putAllMetadata(
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+      @java.lang.Override
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+      @java.lang.Override
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+      // @@protoc_insertion_point(builder_scope:google.cloud.retail.v2.PredictResponse.PredictionResult)
+    }
+
+    // @@protoc_insertion_point(class_scope:google.cloud.retail.v2.PredictResponse.PredictionResult)
+    private static final com.google.cloud.retail.v2.PredictResponse.PredictionResult
+        DEFAULT_INSTANCE;
+
+    static {
+      DEFAULT_INSTANCE = new com.google.cloud.retail.v2.PredictResponse.PredictionResult();
+    }
+
+    public static com.google.cloud.retail.v2.PredictResponse.PredictionResult getDefaultInstance() {
+      return DEFAULT_INSTANCE;
+    }
+
+    private static final com.google.protobuf.Parser<PredictionResult> PARSER =
+        new com.google.protobuf.AbstractParser<PredictionResult>() {
+          @java.lang.Override
+          public PredictionResult parsePartialFrom(
+              com.google.protobuf.CodedInputStream input,
+              com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+              throws com.google.protobuf.InvalidProtocolBufferException {
+            return new PredictionResult(input, extensionRegistry);
+          }
+        };
+
+    public static com.google.protobuf.Parser<PredictionResult> parser() {
+      return PARSER;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Parser<PredictionResult> getParserForType() {
+      return PARSER;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.PredictResponse.PredictionResult getDefaultInstanceForType() {
+      return DEFAULT_INSTANCE;
+    }
+  }
+
+  public static final int RESULTS_FIELD_NUMBER = 1;
+  private java.util.List<com.google.cloud.retail.v2.PredictResponse.PredictionResult> results_;
+  /**
+   *
+   *
+   * <pre>
+   * A list of recommended products. The order represents the ranking (from the
+   * most relevant product to the least).
+   * </pre>
+   *
+   * <code>repeated .google.cloud.retail.v2.PredictResponse.PredictionResult results = 1;</code>
+   */
+  @java.lang.Override
+  public java.util.List<com.google.cloud.retail.v2.PredictResponse.PredictionResult>
+      getResultsList() {
+    return results_;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * A list of recommended products. The order represents the ranking (from the
+   * most relevant product to the least).
+   * </pre>
+   *
+   * <code>repeated .google.cloud.retail.v2.PredictResponse.PredictionResult results = 1;</code>
+   */
+  @java.lang.Override
+  public java.util.List<
+          ? extends com.google.cloud.retail.v2.PredictResponse.PredictionResultOrBuilder>
+      getResultsOrBuilderList() {
+    return results_;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * A list of recommended products. The order represents the ranking (from the
+   * most relevant product to the least).
+   * </pre>
+   *
+   * <code>repeated .google.cloud.retail.v2.PredictResponse.PredictionResult results = 1;</code>
+   */
+  @java.lang.Override
+  public int getResultsCount() {
+    return results_.size();
+  }
+  /**
+   *
+   *
+   * <pre>
+   * A list of recommended products. The order represents the ranking (from the
+   * most relevant product to the least).
+   * </pre>
+   *
+   * <code>repeated .google.cloud.retail.v2.PredictResponse.PredictionResult results = 1;</code>
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.PredictResponse.PredictionResult getResults(int index) {
+    return results_.get(index);
+  }
+  /**
+   *
+   *
+   * <pre>
+   * A list of recommended products. The order represents the ranking (from the
+   * most relevant product to the least).
+   * </pre>
+   *
+   * <code>repeated .google.cloud.retail.v2.PredictResponse.PredictionResult results = 1;</code>
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.PredictResponse.PredictionResultOrBuilder getResultsOrBuilder(
+      int index) {
+    return results_.get(index);
+  }
+
+  public static final int ATTRIBUTION_TOKEN_FIELD_NUMBER = 2;
+  private volatile java.lang.Object attributionToken_;
+  /**
+   *
+   *
+   * <pre>
+   * A unique attribution token. This should be included in the
+   * [UserEvent][google.cloud.retail.v2.UserEvent] logs resulting from this
+   * recommendation, which enables accurate attribution of recommendation model
+   * performance.
+   * </pre>
+   *
+   * <code>string attribution_token = 2;</code>
+   *
+   * @return The attributionToken.
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+  public java.lang.String getAttributionToken() {
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+   *
+   *
+   * <pre>
+   * A unique attribution token. This should be included in the
+   * [UserEvent][google.cloud.retail.v2.UserEvent] logs resulting from this
+   * recommendation, which enables accurate attribution of recommendation model
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+  /**
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+   *
+   * <pre>
+   * IDs of products in the request that were missing from the inventory.
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+   *
+   * <code>repeated string missing_ids = 3;</code>
+   *
+   * @return A list containing the missingIds.
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+   *
+   *
+   * <pre>
+   * IDs of products in the request that were missing from the inventory.
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+   *
+   * <code>repeated string missing_ids = 3;</code>
+   *
+   * @return The count of missingIds.
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+   * <pre>
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+   * </pre>
+   *
+   * <code>repeated string missing_ids = 3;</code>
+   *
+   * @param index The index of the element to return.
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+  }
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+   *
+   *
+   * <pre>
+   * IDs of products in the request that were missing from the inventory.
+   * </pre>
+   *
+   * <code>repeated string missing_ids = 3;</code>
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+   *
+   * <pre>
+   * True if the validateOnly property was set in the request.
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+  public int getSerializedSize() {
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+  public boolean equals(final java.lang.Object obj) {
+    if (obj == this) {
+      return true;
+    }
+    if (!(obj instanceof com.google.cloud.retail.v2.PredictResponse)) {
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+    com.google.cloud.retail.v2.PredictResponse other =
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+    if (!getResultsList().equals(other.getResultsList())) return false;
+    if (!getAttributionToken().equals(other.getAttributionToken())) return false;
+    if (!getMissingIdsList().equals(other.getMissingIdsList())) return false;
+    if (getValidateOnly() != other.getValidateOnly()) return false;
+    if (!unknownFields.equals(other.unknownFields)) return false;
+    return true;
+  }
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+  @java.lang.Override
+  public int hashCode() {
+    if (memoizedHashCode != 0) {
+      return memoizedHashCode;
+    }
+    int hash = 41;
+    hash = (19 * hash) + getDescriptor().hashCode();
+    if (getResultsCount() > 0) {
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+  public static com.google.cloud.retail.v2.PredictResponse parseFrom(java.nio.ByteBuffer data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.PredictResponse parseFrom(
+      java.nio.ByteBuffer data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.PredictResponse parseFrom(
+      com.google.protobuf.ByteString data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.PredictResponse parseFrom(
+      com.google.protobuf.ByteString data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.PredictResponse parseFrom(byte[] data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.PredictResponse parseFrom(
+      byte[] data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.PredictResponse parseFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.PredictResponse parseFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.PredictResponse parseDelimitedFrom(
+      java.io.InputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.PredictResponse parseDelimitedFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.PredictResponse parseFrom(
+      com.google.protobuf.CodedInputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.PredictResponse parseFrom(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  @java.lang.Override
+  public Builder newBuilderForType() {
+    return newBuilder();
+  }
+
+  public static Builder newBuilder() {
+    return DEFAULT_INSTANCE.toBuilder();
+  }
+
+  public static Builder newBuilder(com.google.cloud.retail.v2.PredictResponse prototype) {
+    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+  }
+
+  @java.lang.Override
+  public Builder toBuilder() {
+    return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
+  }
+
+  @java.lang.Override
+  protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+    Builder builder = new Builder(parent);
+    return builder;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Response message for predict method.
+   * </pre>
+   *
+   * Protobuf type {@code google.cloud.retail.v2.PredictResponse}
+   */
+  public static final class Builder extends com.google.protobuf.GeneratedMessageV3.Builder<Builder>
+      implements
+      // @@protoc_insertion_point(builder_implements:google.cloud.retail.v2.PredictResponse)
+      com.google.cloud.retail.v2.PredictResponseOrBuilder {
+    public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+      return com.google.cloud.retail.v2.PredictionServiceProto
+          .internal_static_google_cloud_retail_v2_PredictResponse_descriptor;
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+        internalGetFieldAccessorTable() {
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+              com.google.cloud.retail.v2.PredictResponse.Builder.class);
+    }
+
+    // Construct using com.google.cloud.retail.v2.PredictResponse.newBuilder()
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
+
+    private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+      super(parent);
+      maybeForceBuilderInitialization();
+    }
+
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders) {
+        getResultsFieldBuilder();
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+    @java.lang.Override
+    public Builder clear() {
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+      if (resultsBuilder_ == null) {
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+
+      missingIds_ = com.google.protobuf.LazyStringArrayList.EMPTY;
+      bitField0_ = (bitField0_ & ~0x00000002);
+      validateOnly_ = false;
+
+      return this;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
+      return com.google.cloud.retail.v2.PredictionServiceProto
+          .internal_static_google_cloud_retail_v2_PredictResponse_descriptor;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.PredictResponse getDefaultInstanceForType() {
+      return com.google.cloud.retail.v2.PredictResponse.getDefaultInstance();
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.PredictResponse build() {
+      com.google.cloud.retail.v2.PredictResponse result = buildPartial();
+      if (!result.isInitialized()) {
+        throw newUninitializedMessageException(result);
+      }
+      return result;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.PredictResponse buildPartial() {
+      com.google.cloud.retail.v2.PredictResponse result =
+          new com.google.cloud.retail.v2.PredictResponse(this);
+      int from_bitField0_ = bitField0_;
+      if (resultsBuilder_ == null) {
+        if (((bitField0_ & 0x00000001) != 0)) {
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+      result.missingIds_ = missingIds_;
+      result.validateOnly_ = validateOnly_;
+      onBuilt();
+      return result;
+    }
+
+    @java.lang.Override
+    public Builder clone() {
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+    }
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+    @java.lang.Override
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+    public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
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+    public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
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+    @java.lang.Override
+    public Builder setRepeatedField(
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+    @java.lang.Override
+    public Builder mergeFrom(com.google.protobuf.Message other) {
+      if (other instanceof com.google.cloud.retail.v2.PredictResponse) {
+        return mergeFrom((com.google.cloud.retail.v2.PredictResponse) other);
+      } else {
+        super.mergeFrom(other);
+        return this;
+      }
+    }
+
+    public Builder mergeFrom(com.google.cloud.retail.v2.PredictResponse other) {
+      if (other == com.google.cloud.retail.v2.PredictResponse.getDefaultInstance()) return this;
+      if (resultsBuilder_ == null) {
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+      }
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+        onChanged();
+      }
+      if (other.getValidateOnly() != false) {
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+      this.mergeUnknownFields(other.unknownFields);
+      onChanged();
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+
+    @java.lang.Override
+    public final boolean isInitialized() {
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+
+    @java.lang.Override
+    public Builder mergeFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      com.google.cloud.retail.v2.PredictResponse parsedMessage = null;
+      try {
+        parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        parsedMessage = (com.google.cloud.retail.v2.PredictResponse) e.getUnfinishedMessage();
+        throw e.unwrapIOException();
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+        if (parsedMessage != null) {
+          mergeFrom(parsedMessage);
+        }
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+      return this;
+    }
+
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+    private java.util.List<com.google.cloud.retail.v2.PredictResponse.PredictionResult> results_ =
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+      if (!((bitField0_ & 0x00000001) != 0)) {
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+        resultsBuilder_;
+
+    /**
+     *
+     *
+     * <pre>
+     * A list of recommended products. The order represents the ranking (from the
+     * most relevant product to the least).
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.PredictResponse.PredictionResult results = 1;</code>
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+    /**
+     *
+     *
+     * <pre>
+     * A list of recommended products. The order represents the ranking (from the
+     * most relevant product to the least).
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.PredictResponse.PredictionResult results = 1;</code>
+     */
+    public int getResultsCount() {
+      if (resultsBuilder_ == null) {
+        return results_.size();
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+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A list of recommended products. The order represents the ranking (from the
+     * most relevant product to the least).
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.PredictResponse.PredictionResult results = 1;</code>
+     */
+    public com.google.cloud.retail.v2.PredictResponse.PredictionResult getResults(int index) {
+      if (resultsBuilder_ == null) {
+        return results_.get(index);
+      } else {
+        return resultsBuilder_.getMessage(index);
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A list of recommended products. The order represents the ranking (from the
+     * most relevant product to the least).
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.PredictResponse.PredictionResult results = 1;</code>
+     */
+    public Builder setResults(
+        int index, com.google.cloud.retail.v2.PredictResponse.PredictionResult value) {
+      if (resultsBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        ensureResultsIsMutable();
+        results_.set(index, value);
+        onChanged();
+      } else {
+        resultsBuilder_.setMessage(index, value);
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A list of recommended products. The order represents the ranking (from the
+     * most relevant product to the least).
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.PredictResponse.PredictionResult results = 1;</code>
+     */
+    public Builder setResults(
+        int index,
+        com.google.cloud.retail.v2.PredictResponse.PredictionResult.Builder builderForValue) {
+      if (resultsBuilder_ == null) {
+        ensureResultsIsMutable();
+        results_.set(index, builderForValue.build());
+        onChanged();
+      } else {
+        resultsBuilder_.setMessage(index, builderForValue.build());
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A list of recommended products. The order represents the ranking (from the
+     * most relevant product to the least).
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.PredictResponse.PredictionResult results = 1;</code>
+     */
+    public Builder addResults(com.google.cloud.retail.v2.PredictResponse.PredictionResult value) {
+      if (resultsBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        ensureResultsIsMutable();
+        results_.add(value);
+        onChanged();
+      } else {
+        resultsBuilder_.addMessage(value);
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A list of recommended products. The order represents the ranking (from the
+     * most relevant product to the least).
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.PredictResponse.PredictionResult results = 1;</code>
+     */
+    public Builder addResults(
+        int index, com.google.cloud.retail.v2.PredictResponse.PredictionResult value) {
+      if (resultsBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        ensureResultsIsMutable();
+        results_.add(index, value);
+        onChanged();
+      } else {
+        resultsBuilder_.addMessage(index, value);
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A list of recommended products. The order represents the ranking (from the
+     * most relevant product to the least).
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.PredictResponse.PredictionResult results = 1;</code>
+     */
+    public Builder addResults(
+        com.google.cloud.retail.v2.PredictResponse.PredictionResult.Builder builderForValue) {
+      if (resultsBuilder_ == null) {
+        ensureResultsIsMutable();
+        results_.add(builderForValue.build());
+        onChanged();
+      } else {
+        resultsBuilder_.addMessage(builderForValue.build());
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A list of recommended products. The order represents the ranking (from the
+     * most relevant product to the least).
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.PredictResponse.PredictionResult results = 1;</code>
+     */
+    public Builder addResults(
+        int index,
+        com.google.cloud.retail.v2.PredictResponse.PredictionResult.Builder builderForValue) {
+      if (resultsBuilder_ == null) {
+        ensureResultsIsMutable();
+        results_.add(index, builderForValue.build());
+        onChanged();
+      } else {
+        resultsBuilder_.addMessage(index, builderForValue.build());
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A list of recommended products. The order represents the ranking (from the
+     * most relevant product to the least).
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.PredictResponse.PredictionResult results = 1;</code>
+     */
+    public Builder addAllResults(
+        java.lang.Iterable<? extends com.google.cloud.retail.v2.PredictResponse.PredictionResult>
+            values) {
+      if (resultsBuilder_ == null) {
+        ensureResultsIsMutable();
+        com.google.protobuf.AbstractMessageLite.Builder.addAll(values, results_);
+        onChanged();
+      } else {
+        resultsBuilder_.addAllMessages(values);
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A list of recommended products. The order represents the ranking (from the
+     * most relevant product to the least).
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.PredictResponse.PredictionResult results = 1;</code>
+     */
+    public Builder clearResults() {
+      if (resultsBuilder_ == null) {
+        results_ = java.util.Collections.emptyList();
+        bitField0_ = (bitField0_ & ~0x00000001);
+        onChanged();
+      } else {
+        resultsBuilder_.clear();
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A list of recommended products. The order represents the ranking (from the
+     * most relevant product to the least).
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.PredictResponse.PredictionResult results = 1;</code>
+     */
+    public Builder removeResults(int index) {
+      if (resultsBuilder_ == null) {
+        ensureResultsIsMutable();
+        results_.remove(index);
+        onChanged();
+      } else {
+        resultsBuilder_.remove(index);
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A list of recommended products. The order represents the ranking (from the
+     * most relevant product to the least).
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.PredictResponse.PredictionResult results = 1;</code>
+     */
+    public com.google.cloud.retail.v2.PredictResponse.PredictionResult.Builder getResultsBuilder(
+        int index) {
+      return getResultsFieldBuilder().getBuilder(index);
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A list of recommended products. The order represents the ranking (from the
+     * most relevant product to the least).
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.PredictResponse.PredictionResult results = 1;</code>
+     */
+    public com.google.cloud.retail.v2.PredictResponse.PredictionResultOrBuilder getResultsOrBuilder(
+        int index) {
+      if (resultsBuilder_ == null) {
+        return results_.get(index);
+      } else {
+        return resultsBuilder_.getMessageOrBuilder(index);
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A list of recommended products. The order represents the ranking (from the
+     * most relevant product to the least).
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.PredictResponse.PredictionResult results = 1;</code>
+     */
+    public java.util.List<
+            ? extends com.google.cloud.retail.v2.PredictResponse.PredictionResultOrBuilder>
+        getResultsOrBuilderList() {
+      if (resultsBuilder_ != null) {
+        return resultsBuilder_.getMessageOrBuilderList();
+      } else {
+        return java.util.Collections.unmodifiableList(results_);
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A list of recommended products. The order represents the ranking (from the
+     * most relevant product to the least).
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.PredictResponse.PredictionResult results = 1;</code>
+     */
+    public com.google.cloud.retail.v2.PredictResponse.PredictionResult.Builder addResultsBuilder() {
+      return getResultsFieldBuilder()
+          .addBuilder(
+              com.google.cloud.retail.v2.PredictResponse.PredictionResult.getDefaultInstance());
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A list of recommended products. The order represents the ranking (from the
+     * most relevant product to the least).
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.PredictResponse.PredictionResult results = 1;</code>
+     */
+    public com.google.cloud.retail.v2.PredictResponse.PredictionResult.Builder addResultsBuilder(
+        int index) {
+      return getResultsFieldBuilder()
+          .addBuilder(
+              index,
+              com.google.cloud.retail.v2.PredictResponse.PredictionResult.getDefaultInstance());
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A list of recommended products. The order represents the ranking (from the
+     * most relevant product to the least).
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.PredictResponse.PredictionResult results = 1;</code>
+     */
+    public java.util.List<com.google.cloud.retail.v2.PredictResponse.PredictionResult.Builder>
+        getResultsBuilderList() {
+      return getResultsFieldBuilder().getBuilderList();
+    }
+
+    private com.google.protobuf.RepeatedFieldBuilderV3<
+            com.google.cloud.retail.v2.PredictResponse.PredictionResult,
+            com.google.cloud.retail.v2.PredictResponse.PredictionResult.Builder,
+            com.google.cloud.retail.v2.PredictResponse.PredictionResultOrBuilder>
+        getResultsFieldBuilder() {
+      if (resultsBuilder_ == null) {
+        resultsBuilder_ =
+            new com.google.protobuf.RepeatedFieldBuilderV3<
+                com.google.cloud.retail.v2.PredictResponse.PredictionResult,
+                com.google.cloud.retail.v2.PredictResponse.PredictionResult.Builder,
+                com.google.cloud.retail.v2.PredictResponse.PredictionResultOrBuilder>(
+                results_, ((bitField0_ & 0x00000001) != 0), getParentForChildren(), isClean());
+        results_ = null;
+      }
+      return resultsBuilder_;
+    }
+
+    private java.lang.Object attributionToken_ = "";
+    /**
+     *
+     *
+     * <pre>
+     * A unique attribution token. This should be included in the
+     * [UserEvent][google.cloud.retail.v2.UserEvent] logs resulting from this
+     * recommendation, which enables accurate attribution of recommendation model
+     * performance.
+     * </pre>
+     *
+     * <code>string attribution_token = 2;</code>
+     *
+     * @return The attributionToken.
+     */
+    public java.lang.String getAttributionToken() {
+      java.lang.Object ref = attributionToken_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        attributionToken_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A unique attribution token. This should be included in the
+     * [UserEvent][google.cloud.retail.v2.UserEvent] logs resulting from this
+     * recommendation, which enables accurate attribution of recommendation model
+     * performance.
+     * </pre>
+     *
+     * <code>string attribution_token = 2;</code>
+     *
+     * @return The bytes for attributionToken.
+     */
+    public com.google.protobuf.ByteString getAttributionTokenBytes() {
+      java.lang.Object ref = attributionToken_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b =
+            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+        attributionToken_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A unique attribution token. This should be included in the
+     * [UserEvent][google.cloud.retail.v2.UserEvent] logs resulting from this
+     * recommendation, which enables accurate attribution of recommendation model
+     * performance.
+     * </pre>
+     *
+     * <code>string attribution_token = 2;</code>
+     *
+     * @param value The attributionToken to set.
+     * @return This builder for chaining.
+     */
+    public Builder setAttributionToken(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+
+      attributionToken_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A unique attribution token. This should be included in the
+     * [UserEvent][google.cloud.retail.v2.UserEvent] logs resulting from this
+     * recommendation, which enables accurate attribution of recommendation model
+     * performance.
+     * </pre>
+     *
+     * <code>string attribution_token = 2;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearAttributionToken() {
+
+      attributionToken_ = getDefaultInstance().getAttributionToken();
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A unique attribution token. This should be included in the
+     * [UserEvent][google.cloud.retail.v2.UserEvent] logs resulting from this
+     * recommendation, which enables accurate attribution of recommendation model
+     * performance.
+     * </pre>
+     *
+     * <code>string attribution_token = 2;</code>
+     *
+     * @param value The bytes for attributionToken to set.
+     * @return This builder for chaining.
+     */
+    public Builder setAttributionTokenBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+
+      attributionToken_ = value;
+      onChanged();
+      return this;
+    }
+
+    private com.google.protobuf.LazyStringList missingIds_ =
+        com.google.protobuf.LazyStringArrayList.EMPTY;
+
+    private void ensureMissingIdsIsMutable() {
+      if (!((bitField0_ & 0x00000002) != 0)) {
+        missingIds_ = new com.google.protobuf.LazyStringArrayList(missingIds_);
+        bitField0_ |= 0x00000002;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * IDs of products in the request that were missing from the inventory.
+     * </pre>
+     *
+     * <code>repeated string missing_ids = 3;</code>
+     *
+     * @return A list containing the missingIds.
+     */
+    public com.google.protobuf.ProtocolStringList getMissingIdsList() {
+      return missingIds_.getUnmodifiableView();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * IDs of products in the request that were missing from the inventory.
+     * </pre>
+     *
+     * <code>repeated string missing_ids = 3;</code>
+     *
+     * @return The count of missingIds.
+     */
+    public int getMissingIdsCount() {
+      return missingIds_.size();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * IDs of products in the request that were missing from the inventory.
+     * </pre>
+     *
+     * <code>repeated string missing_ids = 3;</code>
+     *
+     * @param index The index of the element to return.
+     * @return The missingIds at the given index.
+     */
+    public java.lang.String getMissingIds(int index) {
+      return missingIds_.get(index);
+    }
+    /**
+     *
+     *
+     * <pre>
+     * IDs of products in the request that were missing from the inventory.
+     * </pre>
+     *
+     * <code>repeated string missing_ids = 3;</code>
+     *
+     * @param index The index of the value to return.
+     * @return The bytes of the missingIds at the given index.
+     */
+    public com.google.protobuf.ByteString getMissingIdsBytes(int index) {
+      return missingIds_.getByteString(index);
+    }
+    /**
+     *
+     *
+     * <pre>
+     * IDs of products in the request that were missing from the inventory.
+     * </pre>
+     *
+     * <code>repeated string missing_ids = 3;</code>
+     *
+     * @param index The index to set the value at.
+     * @param value The missingIds to set.
+     * @return This builder for chaining.
+     */
+    public Builder setMissingIds(int index, java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      ensureMissingIdsIsMutable();
+      missingIds_.set(index, value);
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * IDs of products in the request that were missing from the inventory.
+     * </pre>
+     *
+     * <code>repeated string missing_ids = 3;</code>
+     *
+     * @param value The missingIds to add.
+     * @return This builder for chaining.
+     */
+    public Builder addMissingIds(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      ensureMissingIdsIsMutable();
+      missingIds_.add(value);
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * IDs of products in the request that were missing from the inventory.
+     * </pre>
+     *
+     * <code>repeated string missing_ids = 3;</code>
+     *
+     * @param values The missingIds to add.
+     * @return This builder for chaining.
+     */
+    public Builder addAllMissingIds(java.lang.Iterable<java.lang.String> values) {
+      ensureMissingIdsIsMutable();
+      com.google.protobuf.AbstractMessageLite.Builder.addAll(values, missingIds_);
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * IDs of products in the request that were missing from the inventory.
+     * </pre>
+     *
+     * <code>repeated string missing_ids = 3;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearMissingIds() {
+      missingIds_ = com.google.protobuf.LazyStringArrayList.EMPTY;
+      bitField0_ = (bitField0_ & ~0x00000002);
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * IDs of products in the request that were missing from the inventory.
+     * </pre>
+     *
+     * <code>repeated string missing_ids = 3;</code>
+     *
+     * @param value The bytes of the missingIds to add.
+     * @return This builder for chaining.
+     */
+    public Builder addMissingIdsBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+      ensureMissingIdsIsMutable();
+      missingIds_.add(value);
+      onChanged();
+      return this;
+    }
+
+    private boolean validateOnly_;
+    /**
+     *
+     *
+     * <pre>
+     * True if the validateOnly property was set in the request.
+     * </pre>
+     *
+     * <code>bool validate_only = 4;</code>
+     *
+     * @return The validateOnly.
+     */
+    @java.lang.Override
+    public boolean getValidateOnly() {
+      return validateOnly_;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * True if the validateOnly property was set in the request.
+     * </pre>
+     *
+     * <code>bool validate_only = 4;</code>
+     *
+     * @param value The validateOnly to set.
+     * @return This builder for chaining.
+     */
+    public Builder setValidateOnly(boolean value) {
+
+      validateOnly_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * True if the validateOnly property was set in the request.
+     * </pre>
+     *
+     * <code>bool validate_only = 4;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearValidateOnly() {
+
+      validateOnly_ = false;
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.setUnknownFields(unknownFields);
+    }
+
+    @java.lang.Override
+    public final Builder mergeUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.mergeUnknownFields(unknownFields);
+    }
+
+    // @@protoc_insertion_point(builder_scope:google.cloud.retail.v2.PredictResponse)
+  }
+
+  // @@protoc_insertion_point(class_scope:google.cloud.retail.v2.PredictResponse)
+  private static final com.google.cloud.retail.v2.PredictResponse DEFAULT_INSTANCE;
+
+  static {
+    DEFAULT_INSTANCE = new com.google.cloud.retail.v2.PredictResponse();
+  }
+
+  public static com.google.cloud.retail.v2.PredictResponse getDefaultInstance() {
+    return DEFAULT_INSTANCE;
+  }
+
+  private static final com.google.protobuf.Parser<PredictResponse> PARSER =
+      new com.google.protobuf.AbstractParser<PredictResponse>() {
+        @java.lang.Override
+        public PredictResponse parsePartialFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws com.google.protobuf.InvalidProtocolBufferException {
+          return new PredictResponse(input, extensionRegistry);
+        }
+      };
+
+  public static com.google.protobuf.Parser<PredictResponse> parser() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.protobuf.Parser<PredictResponse> getParserForType() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.cloud.retail.v2.PredictResponse getDefaultInstanceForType() {
+    return DEFAULT_INSTANCE;
+  }
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/PredictResponseOrBuilder.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/PredictResponseOrBuilder.java
new file mode 100644
index 00000000..0a086b7a
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/PredictResponseOrBuilder.java
@@ -0,0 +1,178 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/prediction_service.proto
+
+package com.google.cloud.retail.v2;
+
+public interface PredictResponseOrBuilder
+    extends
+    // @@protoc_insertion_point(interface_extends:google.cloud.retail.v2.PredictResponse)
+    com.google.protobuf.MessageOrBuilder {
+
+  /**
+   *
+   *
+   * <pre>
+   * A list of recommended products. The order represents the ranking (from the
+   * most relevant product to the least).
+   * </pre>
+   *
+   * <code>repeated .google.cloud.retail.v2.PredictResponse.PredictionResult results = 1;</code>
+   */
+  java.util.List<com.google.cloud.retail.v2.PredictResponse.PredictionResult> getResultsList();
+  /**
+   *
+   *
+   * <pre>
+   * A list of recommended products. The order represents the ranking (from the
+   * most relevant product to the least).
+   * </pre>
+   *
+   * <code>repeated .google.cloud.retail.v2.PredictResponse.PredictionResult results = 1;</code>
+   */
+  com.google.cloud.retail.v2.PredictResponse.PredictionResult getResults(int index);
+  /**
+   *
+   *
+   * <pre>
+   * A list of recommended products. The order represents the ranking (from the
+   * most relevant product to the least).
+   * </pre>
+   *
+   * <code>repeated .google.cloud.retail.v2.PredictResponse.PredictionResult results = 1;</code>
+   */
+  int getResultsCount();
+  /**
+   *
+   *
+   * <pre>
+   * A list of recommended products. The order represents the ranking (from the
+   * most relevant product to the least).
+   * </pre>
+   *
+   * <code>repeated .google.cloud.retail.v2.PredictResponse.PredictionResult results = 1;</code>
+   */
+  java.util.List<? extends com.google.cloud.retail.v2.PredictResponse.PredictionResultOrBuilder>
+      getResultsOrBuilderList();
+  /**
+   *
+   *
+   * <pre>
+   * A list of recommended products. The order represents the ranking (from the
+   * most relevant product to the least).
+   * </pre>
+   *
+   * <code>repeated .google.cloud.retail.v2.PredictResponse.PredictionResult results = 1;</code>
+   */
+  com.google.cloud.retail.v2.PredictResponse.PredictionResultOrBuilder getResultsOrBuilder(
+      int index);
+
+  /**
+   *
+   *
+   * <pre>
+   * A unique attribution token. This should be included in the
+   * [UserEvent][google.cloud.retail.v2.UserEvent] logs resulting from this
+   * recommendation, which enables accurate attribution of recommendation model
+   * performance.
+   * </pre>
+   *
+   * <code>string attribution_token = 2;</code>
+   *
+   * @return The attributionToken.
+   */
+  java.lang.String getAttributionToken();
+  /**
+   *
+   *
+   * <pre>
+   * A unique attribution token. This should be included in the
+   * [UserEvent][google.cloud.retail.v2.UserEvent] logs resulting from this
+   * recommendation, which enables accurate attribution of recommendation model
+   * performance.
+   * </pre>
+   *
+   * <code>string attribution_token = 2;</code>
+   *
+   * @return The bytes for attributionToken.
+   */
+  com.google.protobuf.ByteString getAttributionTokenBytes();
+
+  /**
+   *
+   *
+   * <pre>
+   * IDs of products in the request that were missing from the inventory.
+   * </pre>
+   *
+   * <code>repeated string missing_ids = 3;</code>
+   *
+   * @return A list containing the missingIds.
+   */
+  java.util.List<java.lang.String> getMissingIdsList();
+  /**
+   *
+   *
+   * <pre>
+   * IDs of products in the request that were missing from the inventory.
+   * </pre>
+   *
+   * <code>repeated string missing_ids = 3;</code>
+   *
+   * @return The count of missingIds.
+   */
+  int getMissingIdsCount();
+  /**
+   *
+   *
+   * <pre>
+   * IDs of products in the request that were missing from the inventory.
+   * </pre>
+   *
+   * <code>repeated string missing_ids = 3;</code>
+   *
+   * @param index The index of the element to return.
+   * @return The missingIds at the given index.
+   */
+  java.lang.String getMissingIds(int index);
+  /**
+   *
+   *
+   * <pre>
+   * IDs of products in the request that were missing from the inventory.
+   * </pre>
+   *
+   * <code>repeated string missing_ids = 3;</code>
+   *
+   * @param index The index of the value to return.
+   * @return The bytes of the missingIds at the given index.
+   */
+  com.google.protobuf.ByteString getMissingIdsBytes(int index);
+
+  /**
+   *
+   *
+   * <pre>
+   * True if the validateOnly property was set in the request.
+   * </pre>
+   *
+   * <code>bool validate_only = 4;</code>
+   *
+   * @return The validateOnly.
+   */
+  boolean getValidateOnly();
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/PredictionServiceProto.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/PredictionServiceProto.java
new file mode 100644
index 00000000..dbd1beae
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/PredictionServiceProto.java
@@ -0,0 +1,185 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/prediction_service.proto
+
+package com.google.cloud.retail.v2;
+
+public final class PredictionServiceProto {
+  private PredictionServiceProto() {}
+
+  public static void registerAllExtensions(com.google.protobuf.ExtensionRegistryLite registry) {}
+
+  public static void registerAllExtensions(com.google.protobuf.ExtensionRegistry registry) {
+    registerAllExtensions((com.google.protobuf.ExtensionRegistryLite) registry);
+  }
+
+  static final com.google.protobuf.Descriptors.Descriptor
+      internal_static_google_cloud_retail_v2_PredictRequest_descriptor;
+  static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_google_cloud_retail_v2_PredictRequest_fieldAccessorTable;
+  static final com.google.protobuf.Descriptors.Descriptor
+      internal_static_google_cloud_retail_v2_PredictRequest_ParamsEntry_descriptor;
+  static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_google_cloud_retail_v2_PredictRequest_ParamsEntry_fieldAccessorTable;
+  static final com.google.protobuf.Descriptors.Descriptor
+      internal_static_google_cloud_retail_v2_PredictRequest_LabelsEntry_descriptor;
+  static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_google_cloud_retail_v2_PredictRequest_LabelsEntry_fieldAccessorTable;
+  static final com.google.protobuf.Descriptors.Descriptor
+      internal_static_google_cloud_retail_v2_PredictResponse_descriptor;
+  static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_google_cloud_retail_v2_PredictResponse_fieldAccessorTable;
+  static final com.google.protobuf.Descriptors.Descriptor
+      internal_static_google_cloud_retail_v2_PredictResponse_PredictionResult_descriptor;
+  static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_google_cloud_retail_v2_PredictResponse_PredictionResult_fieldAccessorTable;
+  static final com.google.protobuf.Descriptors.Descriptor
+      internal_static_google_cloud_retail_v2_PredictResponse_PredictionResult_MetadataEntry_descriptor;
+  static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_google_cloud_retail_v2_PredictResponse_PredictionResult_MetadataEntry_fieldAccessorTable;
+
+  public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
+    return descriptor;
+  }
+
+  private static com.google.protobuf.Descriptors.FileDescriptor descriptor;
+
+  static {
+    java.lang.String[] descriptorData = {
+      "\n/google/cloud/retail/v2/prediction_serv"
+          + "ice.proto\022\026google.cloud.retail.v2\032\034googl"
+          + "e/api/annotations.proto\032\027google/api/clie"
+          + "nt.proto\032\037google/api/field_behavior.prot"
+          + "o\032\'google/cloud/retail/v2/user_event.pro"
+          + "to\032\034google/protobuf/struct.proto\"\260\003\n\016Pre"
+          + "dictRequest\022\026\n\tplacement\030\001 \001(\tB\003\340A\002\022:\n\nu"
+          + "ser_event\030\002 \001(\0132!.google.cloud.retail.v2"
+          + ".UserEventB\003\340A\002\022\021\n\tpage_size\030\003 \001(\005\022\022\n\npa"
+          + "ge_token\030\004 \001(\t\022\016\n\006filter\030\005 \001(\t\022\025\n\rvalida"
+          + "te_only\030\006 \001(\010\022B\n\006params\030\007 \003(\01322.google.c"
+          + "loud.retail.v2.PredictRequest.ParamsEntr"
+          + "y\022B\n\006labels\030\010 \003(\01322.google.cloud.retail."
+          + "v2.PredictRequest.LabelsEntry\032E\n\013ParamsE"
+          + "ntry\022\013\n\003key\030\001 \001(\t\022%\n\005value\030\002 \001(\0132\026.googl"
+          + "e.protobuf.Value:\0028\001\032-\n\013LabelsEntry\022\013\n\003k"
+          + "ey\030\001 \001(\t\022\r\n\005value\030\002 \001(\t:\0028\001\"\347\002\n\017PredictR"
+          + "esponse\022I\n\007results\030\001 \003(\01328.google.cloud."
+          + "retail.v2.PredictResponse.PredictionResu"
+          + "lt\022\031\n\021attribution_token\030\002 \001(\t\022\023\n\013missing"
+          + "_ids\030\003 \003(\t\022\025\n\rvalidate_only\030\004 \001(\010\032\301\001\n\020Pr"
+          + "edictionResult\022\n\n\002id\030\001 \001(\t\022X\n\010metadata\030\002"
+          + " \003(\0132F.google.cloud.retail.v2.PredictRes"
+          + "ponse.PredictionResult.MetadataEntry\032G\n\r"
+          + "MetadataEntry\022\013\n\003key\030\001 \001(\t\022%\n\005value\030\002 \001("
+          + "\0132\026.google.protobuf.Value:\0028\0012\216\002\n\021Predic"
+          + "tionService\022\255\001\n\007Predict\022&.google.cloud.r"
+          + "etail.v2.PredictRequest\032\'.google.cloud.r"
+          + "etail.v2.PredictResponse\"Q\202\323\344\223\002K\"F/v2/{p"
+          + "lacement=projects/*/locations/*/catalogs"
+          + "/*/placements/*}:predict:\001*\032I\312A\025retail.g"
+          + "oogleapis.com\322A.https://www.googleapis.c"
+          + "om/auth/cloud-platformB\313\001\n\032com.google.cl"
+          + "oud.retail.v2B\026PredictionServiceProtoP\001Z"
+          + "<google.golang.org/genproto/googleapis/c"
+          + "loud/retail/v2;retail\242\002\006RETAIL\252\002\026Google."
+          + "Cloud.Retail.V2\312\002\026Google\\Cloud\\Retail\\V2"
+          + "\352\002\031Google::Cloud::Retail::V2b\006proto3"
+    };
+    descriptor =
+        com.google.protobuf.Descriptors.FileDescriptor.internalBuildGeneratedFileFrom(
+            descriptorData,
+            new com.google.protobuf.Descriptors.FileDescriptor[] {
+              com.google.api.AnnotationsProto.getDescriptor(),
+              com.google.api.ClientProto.getDescriptor(),
+              com.google.api.FieldBehaviorProto.getDescriptor(),
+              com.google.cloud.retail.v2.UserEventProto.getDescriptor(),
+              com.google.protobuf.StructProto.getDescriptor(),
+            });
+    internal_static_google_cloud_retail_v2_PredictRequest_descriptor =
+        getDescriptor().getMessageTypes().get(0);
+    internal_static_google_cloud_retail_v2_PredictRequest_fieldAccessorTable =
+        new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+            internal_static_google_cloud_retail_v2_PredictRequest_descriptor,
+            new java.lang.String[] {
+              "Placement",
+              "UserEvent",
+              "PageSize",
+              "PageToken",
+              "Filter",
+              "ValidateOnly",
+              "Params",
+              "Labels",
+            });
+    internal_static_google_cloud_retail_v2_PredictRequest_ParamsEntry_descriptor =
+        internal_static_google_cloud_retail_v2_PredictRequest_descriptor.getNestedTypes().get(0);
+    internal_static_google_cloud_retail_v2_PredictRequest_ParamsEntry_fieldAccessorTable =
+        new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+            internal_static_google_cloud_retail_v2_PredictRequest_ParamsEntry_descriptor,
+            new java.lang.String[] {
+              "Key", "Value",
+            });
+    internal_static_google_cloud_retail_v2_PredictRequest_LabelsEntry_descriptor =
+        internal_static_google_cloud_retail_v2_PredictRequest_descriptor.getNestedTypes().get(1);
+    internal_static_google_cloud_retail_v2_PredictRequest_LabelsEntry_fieldAccessorTable =
+        new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+            internal_static_google_cloud_retail_v2_PredictRequest_LabelsEntry_descriptor,
+            new java.lang.String[] {
+              "Key", "Value",
+            });
+    internal_static_google_cloud_retail_v2_PredictResponse_descriptor =
+        getDescriptor().getMessageTypes().get(1);
+    internal_static_google_cloud_retail_v2_PredictResponse_fieldAccessorTable =
+        new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+            internal_static_google_cloud_retail_v2_PredictResponse_descriptor,
+            new java.lang.String[] {
+              "Results", "AttributionToken", "MissingIds", "ValidateOnly",
+            });
+    internal_static_google_cloud_retail_v2_PredictResponse_PredictionResult_descriptor =
+        internal_static_google_cloud_retail_v2_PredictResponse_descriptor.getNestedTypes().get(0);
+    internal_static_google_cloud_retail_v2_PredictResponse_PredictionResult_fieldAccessorTable =
+        new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+            internal_static_google_cloud_retail_v2_PredictResponse_PredictionResult_descriptor,
+            new java.lang.String[] {
+              "Id", "Metadata",
+            });
+    internal_static_google_cloud_retail_v2_PredictResponse_PredictionResult_MetadataEntry_descriptor =
+        internal_static_google_cloud_retail_v2_PredictResponse_PredictionResult_descriptor
+            .getNestedTypes()
+            .get(0);
+    internal_static_google_cloud_retail_v2_PredictResponse_PredictionResult_MetadataEntry_fieldAccessorTable =
+        new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+            internal_static_google_cloud_retail_v2_PredictResponse_PredictionResult_MetadataEntry_descriptor,
+            new java.lang.String[] {
+              "Key", "Value",
+            });
+    com.google.protobuf.ExtensionRegistry registry =
+        com.google.protobuf.ExtensionRegistry.newInstance();
+    registry.add(com.google.api.ClientProto.defaultHost);
+    registry.add(com.google.api.FieldBehaviorProto.fieldBehavior);
+    registry.add(com.google.api.AnnotationsProto.http);
+    registry.add(com.google.api.ClientProto.oauthScopes);
+    com.google.protobuf.Descriptors.FileDescriptor.internalUpdateFileDescriptor(
+        descriptor, registry);
+    com.google.api.AnnotationsProto.getDescriptor();
+    com.google.api.ClientProto.getDescriptor();
+    com.google.api.FieldBehaviorProto.getDescriptor();
+    com.google.cloud.retail.v2.UserEventProto.getDescriptor();
+    com.google.protobuf.StructProto.getDescriptor();
+  }
+
+  // @@protoc_insertion_point(outer_class_scope)
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/PriceInfo.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/PriceInfo.java
new file mode 100644
index 00000000..8d380510
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/PriceInfo.java
@@ -0,0 +1,961 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/common.proto
+
+package com.google.cloud.retail.v2;
+
+/**
+ *
+ *
+ * <pre>
+ * The price information of a [Product][google.cloud.retail.v2.Product].
+ * </pre>
+ *
+ * Protobuf type {@code google.cloud.retail.v2.PriceInfo}
+ */
+public final class PriceInfo extends com.google.protobuf.GeneratedMessageV3
+    implements
+    // @@protoc_insertion_point(message_implements:google.cloud.retail.v2.PriceInfo)
+    PriceInfoOrBuilder {
+  private static final long serialVersionUID = 0L;
+  // Use PriceInfo.newBuilder() to construct.
+  private PriceInfo(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+    super(builder);
+  }
+
+  private PriceInfo() {
+    currencyCode_ = "";
+  }
+
+  @java.lang.Override
+  @SuppressWarnings({"unused"})
+  protected java.lang.Object newInstance(UnusedPrivateParameter unused) {
+    return new PriceInfo();
+  }
+
+  @java.lang.Override
+  public final com.google.protobuf.UnknownFieldSet getUnknownFields() {
+    return this.unknownFields;
+  }
+
+  private PriceInfo(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    this();
+    if (extensionRegistry == null) {
+      throw new java.lang.NullPointerException();
+    }
+    com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+        com.google.protobuf.UnknownFieldSet.newBuilder();
+    try {
+      boolean done = false;
+      while (!done) {
+        int tag = input.readTag();
+        switch (tag) {
+          case 0:
+            done = true;
+            break;
+          case 10:
+            {
+              java.lang.String s = input.readStringRequireUtf8();
+
+              currencyCode_ = s;
+              break;
+            }
+          case 21:
+            {
+              price_ = input.readFloat();
+              break;
+            }
+          case 29:
+            {
+              originalPrice_ = input.readFloat();
+              break;
+            }
+          case 37:
+            {
+              cost_ = input.readFloat();
+              break;
+            }
+          default:
+            {
+              if (!parseUnknownField(input, unknownFields, extensionRegistry, tag)) {
+                done = true;
+              }
+              break;
+            }
+        }
+      }
+    } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+      throw e.setUnfinishedMessage(this);
+    } catch (java.io.IOException e) {
+      throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
+    } finally {
+      this.unknownFields = unknownFields.build();
+      makeExtensionsImmutable();
+    }
+  }
+
+  public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+    return com.google.cloud.retail.v2.CommonProto
+        .internal_static_google_cloud_retail_v2_PriceInfo_descriptor;
+  }
+
+  @java.lang.Override
+  protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internalGetFieldAccessorTable() {
+    return com.google.cloud.retail.v2.CommonProto
+        .internal_static_google_cloud_retail_v2_PriceInfo_fieldAccessorTable
+        .ensureFieldAccessorsInitialized(
+            com.google.cloud.retail.v2.PriceInfo.class,
+            com.google.cloud.retail.v2.PriceInfo.Builder.class);
+  }
+
+  public static final int CURRENCY_CODE_FIELD_NUMBER = 1;
+  private volatile java.lang.Object currencyCode_;
+  /**
+   *
+   *
+   * <pre>
+   * The 3-letter currency code defined in [ISO
+   * 4217](https://www.iso.org/iso-4217-currency-codes.html).
+   * If this field is an unrecognizable currency code, an INVALID_ARGUMENT
+   * error is returned.
+   * </pre>
+   *
+   * <code>string currency_code = 1;</code>
+   *
+   * @return The currencyCode.
+   */
+  @java.lang.Override
+  public java.lang.String getCurrencyCode() {
+    java.lang.Object ref = currencyCode_;
+    if (ref instanceof java.lang.String) {
+      return (java.lang.String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+      java.lang.String s = bs.toStringUtf8();
+      currencyCode_ = s;
+      return s;
+    }
+  }
+  /**
+   *
+   *
+   * <pre>
+   * The 3-letter currency code defined in [ISO
+   * 4217](https://www.iso.org/iso-4217-currency-codes.html).
+   * If this field is an unrecognizable currency code, an INVALID_ARGUMENT
+   * error is returned.
+   * </pre>
+   *
+   * <code>string currency_code = 1;</code>
+   *
+   * @return The bytes for currencyCode.
+   */
+  @java.lang.Override
+  public com.google.protobuf.ByteString getCurrencyCodeBytes() {
+    java.lang.Object ref = currencyCode_;
+    if (ref instanceof java.lang.String) {
+      com.google.protobuf.ByteString b =
+          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+      currencyCode_ = b;
+      return b;
+    } else {
+      return (com.google.protobuf.ByteString) ref;
+    }
+  }
+
+  public static final int PRICE_FIELD_NUMBER = 2;
+  private float price_;
+  /**
+   *
+   *
+   * <pre>
+   * Price of the product.
+   * Google Merchant Center property
+   * [price](https://support.google.com/merchants/answer/6324371). Schema.org
+   * property [Offer.priceSpecification](https://schema.org/priceSpecification).
+   * </pre>
+   *
+   * <code>float price = 2;</code>
+   *
+   * @return The price.
+   */
+  @java.lang.Override
+  public float getPrice() {
+    return price_;
+  }
+
+  public static final int ORIGINAL_PRICE_FIELD_NUMBER = 3;
+  private float originalPrice_;
+  /**
+   *
+   *
+   * <pre>
+   * Price of the product without any discount. If zero, by default set to be
+   * the [price][google.cloud.retail.v2.PriceInfo.price].
+   * </pre>
+   *
+   * <code>float original_price = 3;</code>
+   *
+   * @return The originalPrice.
+   */
+  @java.lang.Override
+  public float getOriginalPrice() {
+    return originalPrice_;
+  }
+
+  public static final int COST_FIELD_NUMBER = 4;
+  private float cost_;
+  /**
+   *
+   *
+   * <pre>
+   * The costs associated with the sale of a particular product. Used for gross
+   * profit reporting.
+   * * Profit = [price][google.cloud.retail.v2.PriceInfo.price] -
+   * [cost][google.cloud.retail.v2.PriceInfo.cost]
+   * Google Merchant Center property
+   * [cost_of_goods_sold](https://support.google.com/merchants/answer/9017895).
+   * </pre>
+   *
+   * <code>float cost = 4;</code>
+   *
+   * @return The cost.
+   */
+  @java.lang.Override
+  public float getCost() {
+    return cost_;
+  }
+
+  private byte memoizedIsInitialized = -1;
+
+  @java.lang.Override
+  public final boolean isInitialized() {
+    byte isInitialized = memoizedIsInitialized;
+    if (isInitialized == 1) return true;
+    if (isInitialized == 0) return false;
+
+    memoizedIsInitialized = 1;
+    return true;
+  }
+
+  @java.lang.Override
+  public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
+    if (!getCurrencyCodeBytes().isEmpty()) {
+      com.google.protobuf.GeneratedMessageV3.writeString(output, 1, currencyCode_);
+    }
+    if (price_ != 0F) {
+      output.writeFloat(2, price_);
+    }
+    if (originalPrice_ != 0F) {
+      output.writeFloat(3, originalPrice_);
+    }
+    if (cost_ != 0F) {
+      output.writeFloat(4, cost_);
+    }
+    unknownFields.writeTo(output);
+  }
+
+  @java.lang.Override
+  public int getSerializedSize() {
+    int size = memoizedSize;
+    if (size != -1) return size;
+
+    size = 0;
+    if (!getCurrencyCodeBytes().isEmpty()) {
+      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(1, currencyCode_);
+    }
+    if (price_ != 0F) {
+      size += com.google.protobuf.CodedOutputStream.computeFloatSize(2, price_);
+    }
+    if (originalPrice_ != 0F) {
+      size += com.google.protobuf.CodedOutputStream.computeFloatSize(3, originalPrice_);
+    }
+    if (cost_ != 0F) {
+      size += com.google.protobuf.CodedOutputStream.computeFloatSize(4, cost_);
+    }
+    size += unknownFields.getSerializedSize();
+    memoizedSize = size;
+    return size;
+  }
+
+  @java.lang.Override
+  public boolean equals(final java.lang.Object obj) {
+    if (obj == this) {
+      return true;
+    }
+    if (!(obj instanceof com.google.cloud.retail.v2.PriceInfo)) {
+      return super.equals(obj);
+    }
+    com.google.cloud.retail.v2.PriceInfo other = (com.google.cloud.retail.v2.PriceInfo) obj;
+
+    if (!getCurrencyCode().equals(other.getCurrencyCode())) return false;
+    if (java.lang.Float.floatToIntBits(getPrice())
+        != java.lang.Float.floatToIntBits(other.getPrice())) return false;
+    if (java.lang.Float.floatToIntBits(getOriginalPrice())
+        != java.lang.Float.floatToIntBits(other.getOriginalPrice())) return false;
+    if (java.lang.Float.floatToIntBits(getCost())
+        != java.lang.Float.floatToIntBits(other.getCost())) return false;
+    if (!unknownFields.equals(other.unknownFields)) return false;
+    return true;
+  }
+
+  @java.lang.Override
+  public int hashCode() {
+    if (memoizedHashCode != 0) {
+      return memoizedHashCode;
+    }
+    int hash = 41;
+    hash = (19 * hash) + getDescriptor().hashCode();
+    hash = (37 * hash) + CURRENCY_CODE_FIELD_NUMBER;
+    hash = (53 * hash) + getCurrencyCode().hashCode();
+    hash = (37 * hash) + PRICE_FIELD_NUMBER;
+    hash = (53 * hash) + java.lang.Float.floatToIntBits(getPrice());
+    hash = (37 * hash) + ORIGINAL_PRICE_FIELD_NUMBER;
+    hash = (53 * hash) + java.lang.Float.floatToIntBits(getOriginalPrice());
+    hash = (37 * hash) + COST_FIELD_NUMBER;
+    hash = (53 * hash) + java.lang.Float.floatToIntBits(getCost());
+    hash = (29 * hash) + unknownFields.hashCode();
+    memoizedHashCode = hash;
+    return hash;
+  }
+
+  public static com.google.cloud.retail.v2.PriceInfo parseFrom(java.nio.ByteBuffer data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.PriceInfo parseFrom(
+      java.nio.ByteBuffer data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.PriceInfo parseFrom(com.google.protobuf.ByteString data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.PriceInfo parseFrom(
+      com.google.protobuf.ByteString data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.PriceInfo parseFrom(byte[] data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.PriceInfo parseFrom(
+      byte[] data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.PriceInfo parseFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.PriceInfo parseFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.PriceInfo parseDelimitedFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.PriceInfo parseDelimitedFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.PriceInfo parseFrom(
+      com.google.protobuf.CodedInputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.PriceInfo parseFrom(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  @java.lang.Override
+  public Builder newBuilderForType() {
+    return newBuilder();
+  }
+
+  public static Builder newBuilder() {
+    return DEFAULT_INSTANCE.toBuilder();
+  }
+
+  public static Builder newBuilder(com.google.cloud.retail.v2.PriceInfo prototype) {
+    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+  }
+
+  @java.lang.Override
+  public Builder toBuilder() {
+    return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
+  }
+
+  @java.lang.Override
+  protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+    Builder builder = new Builder(parent);
+    return builder;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * The price information of a [Product][google.cloud.retail.v2.Product].
+   * </pre>
+   *
+   * Protobuf type {@code google.cloud.retail.v2.PriceInfo}
+   */
+  public static final class Builder extends com.google.protobuf.GeneratedMessageV3.Builder<Builder>
+      implements
+      // @@protoc_insertion_point(builder_implements:google.cloud.retail.v2.PriceInfo)
+      com.google.cloud.retail.v2.PriceInfoOrBuilder {
+    public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+      return com.google.cloud.retail.v2.CommonProto
+          .internal_static_google_cloud_retail_v2_PriceInfo_descriptor;
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return com.google.cloud.retail.v2.CommonProto
+          .internal_static_google_cloud_retail_v2_PriceInfo_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              com.google.cloud.retail.v2.PriceInfo.class,
+              com.google.cloud.retail.v2.PriceInfo.Builder.class);
+    }
+
+    // Construct using com.google.cloud.retail.v2.PriceInfo.newBuilder()
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
+
+    private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+      super(parent);
+      maybeForceBuilderInitialization();
+    }
+
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders) {}
+    }
+
+    @java.lang.Override
+    public Builder clear() {
+      super.clear();
+      currencyCode_ = "";
+
+      price_ = 0F;
+
+      originalPrice_ = 0F;
+
+      cost_ = 0F;
+
+      return this;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
+      return com.google.cloud.retail.v2.CommonProto
+          .internal_static_google_cloud_retail_v2_PriceInfo_descriptor;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.PriceInfo getDefaultInstanceForType() {
+      return com.google.cloud.retail.v2.PriceInfo.getDefaultInstance();
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.PriceInfo build() {
+      com.google.cloud.retail.v2.PriceInfo result = buildPartial();
+      if (!result.isInitialized()) {
+        throw newUninitializedMessageException(result);
+      }
+      return result;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.PriceInfo buildPartial() {
+      com.google.cloud.retail.v2.PriceInfo result = new com.google.cloud.retail.v2.PriceInfo(this);
+      result.currencyCode_ = currencyCode_;
+      result.price_ = price_;
+      result.originalPrice_ = originalPrice_;
+      result.cost_ = cost_;
+      onBuilt();
+      return result;
+    }
+
+    @java.lang.Override
+    public Builder clone() {
+      return super.clone();
+    }
+
+    @java.lang.Override
+    public Builder setField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.setField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
+      return super.clearField(field);
+    }
+
+    @java.lang.Override
+    public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+      return super.clearOneof(oneof);
+    }
+
+    @java.lang.Override
+    public Builder setRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, int index, java.lang.Object value) {
+      return super.setRepeatedField(field, index, value);
+    }
+
+    @java.lang.Override
+    public Builder addRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.addRepeatedField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(com.google.protobuf.Message other) {
+      if (other instanceof com.google.cloud.retail.v2.PriceInfo) {
+        return mergeFrom((com.google.cloud.retail.v2.PriceInfo) other);
+      } else {
+        super.mergeFrom(other);
+        return this;
+      }
+    }
+
+    public Builder mergeFrom(com.google.cloud.retail.v2.PriceInfo other) {
+      if (other == com.google.cloud.retail.v2.PriceInfo.getDefaultInstance()) return this;
+      if (!other.getCurrencyCode().isEmpty()) {
+        currencyCode_ = other.currencyCode_;
+        onChanged();
+      }
+      if (other.getPrice() != 0F) {
+        setPrice(other.getPrice());
+      }
+      if (other.getOriginalPrice() != 0F) {
+        setOriginalPrice(other.getOriginalPrice());
+      }
+      if (other.getCost() != 0F) {
+        setCost(other.getCost());
+      }
+      this.mergeUnknownFields(other.unknownFields);
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final boolean isInitialized() {
+      return true;
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      com.google.cloud.retail.v2.PriceInfo parsedMessage = null;
+      try {
+        parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        parsedMessage = (com.google.cloud.retail.v2.PriceInfo) e.getUnfinishedMessage();
+        throw e.unwrapIOException();
+      } finally {
+        if (parsedMessage != null) {
+          mergeFrom(parsedMessage);
+        }
+      }
+      return this;
+    }
+
+    private java.lang.Object currencyCode_ = "";
+    /**
+     *
+     *
+     * <pre>
+     * The 3-letter currency code defined in [ISO
+     * 4217](https://www.iso.org/iso-4217-currency-codes.html).
+     * If this field is an unrecognizable currency code, an INVALID_ARGUMENT
+     * error is returned.
+     * </pre>
+     *
+     * <code>string currency_code = 1;</code>
+     *
+     * @return The currencyCode.
+     */
+    public java.lang.String getCurrencyCode() {
+      java.lang.Object ref = currencyCode_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        currencyCode_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The 3-letter currency code defined in [ISO
+     * 4217](https://www.iso.org/iso-4217-currency-codes.html).
+     * If this field is an unrecognizable currency code, an INVALID_ARGUMENT
+     * error is returned.
+     * </pre>
+     *
+     * <code>string currency_code = 1;</code>
+     *
+     * @return The bytes for currencyCode.
+     */
+    public com.google.protobuf.ByteString getCurrencyCodeBytes() {
+      java.lang.Object ref = currencyCode_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b =
+            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+        currencyCode_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The 3-letter currency code defined in [ISO
+     * 4217](https://www.iso.org/iso-4217-currency-codes.html).
+     * If this field is an unrecognizable currency code, an INVALID_ARGUMENT
+     * error is returned.
+     * </pre>
+     *
+     * <code>string currency_code = 1;</code>
+     *
+     * @param value The currencyCode to set.
+     * @return This builder for chaining.
+     */
+    public Builder setCurrencyCode(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+
+      currencyCode_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The 3-letter currency code defined in [ISO
+     * 4217](https://www.iso.org/iso-4217-currency-codes.html).
+     * If this field is an unrecognizable currency code, an INVALID_ARGUMENT
+     * error is returned.
+     * </pre>
+     *
+     * <code>string currency_code = 1;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearCurrencyCode() {
+
+      currencyCode_ = getDefaultInstance().getCurrencyCode();
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The 3-letter currency code defined in [ISO
+     * 4217](https://www.iso.org/iso-4217-currency-codes.html).
+     * If this field is an unrecognizable currency code, an INVALID_ARGUMENT
+     * error is returned.
+     * </pre>
+     *
+     * <code>string currency_code = 1;</code>
+     *
+     * @param value The bytes for currencyCode to set.
+     * @return This builder for chaining.
+     */
+    public Builder setCurrencyCodeBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+
+      currencyCode_ = value;
+      onChanged();
+      return this;
+    }
+
+    private float price_;
+    /**
+     *
+     *
+     * <pre>
+     * Price of the product.
+     * Google Merchant Center property
+     * [price](https://support.google.com/merchants/answer/6324371). Schema.org
+     * property [Offer.priceSpecification](https://schema.org/priceSpecification).
+     * </pre>
+     *
+     * <code>float price = 2;</code>
+     *
+     * @return The price.
+     */
+    @java.lang.Override
+    public float getPrice() {
+      return price_;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Price of the product.
+     * Google Merchant Center property
+     * [price](https://support.google.com/merchants/answer/6324371). Schema.org
+     * property [Offer.priceSpecification](https://schema.org/priceSpecification).
+     * </pre>
+     *
+     * <code>float price = 2;</code>
+     *
+     * @param value The price to set.
+     * @return This builder for chaining.
+     */
+    public Builder setPrice(float value) {
+
+      price_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Price of the product.
+     * Google Merchant Center property
+     * [price](https://support.google.com/merchants/answer/6324371). Schema.org
+     * property [Offer.priceSpecification](https://schema.org/priceSpecification).
+     * </pre>
+     *
+     * <code>float price = 2;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearPrice() {
+
+      price_ = 0F;
+      onChanged();
+      return this;
+    }
+
+    private float originalPrice_;
+    /**
+     *
+     *
+     * <pre>
+     * Price of the product without any discount. If zero, by default set to be
+     * the [price][google.cloud.retail.v2.PriceInfo.price].
+     * </pre>
+     *
+     * <code>float original_price = 3;</code>
+     *
+     * @return The originalPrice.
+     */
+    @java.lang.Override
+    public float getOriginalPrice() {
+      return originalPrice_;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Price of the product without any discount. If zero, by default set to be
+     * the [price][google.cloud.retail.v2.PriceInfo.price].
+     * </pre>
+     *
+     * <code>float original_price = 3;</code>
+     *
+     * @param value The originalPrice to set.
+     * @return This builder for chaining.
+     */
+    public Builder setOriginalPrice(float value) {
+
+      originalPrice_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Price of the product without any discount. If zero, by default set to be
+     * the [price][google.cloud.retail.v2.PriceInfo.price].
+     * </pre>
+     *
+     * <code>float original_price = 3;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearOriginalPrice() {
+
+      originalPrice_ = 0F;
+      onChanged();
+      return this;
+    }
+
+    private float cost_;
+    /**
+     *
+     *
+     * <pre>
+     * The costs associated with the sale of a particular product. Used for gross
+     * profit reporting.
+     * * Profit = [price][google.cloud.retail.v2.PriceInfo.price] -
+     * [cost][google.cloud.retail.v2.PriceInfo.cost]
+     * Google Merchant Center property
+     * [cost_of_goods_sold](https://support.google.com/merchants/answer/9017895).
+     * </pre>
+     *
+     * <code>float cost = 4;</code>
+     *
+     * @return The cost.
+     */
+    @java.lang.Override
+    public float getCost() {
+      return cost_;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The costs associated with the sale of a particular product. Used for gross
+     * profit reporting.
+     * * Profit = [price][google.cloud.retail.v2.PriceInfo.price] -
+     * [cost][google.cloud.retail.v2.PriceInfo.cost]
+     * Google Merchant Center property
+     * [cost_of_goods_sold](https://support.google.com/merchants/answer/9017895).
+     * </pre>
+     *
+     * <code>float cost = 4;</code>
+     *
+     * @param value The cost to set.
+     * @return This builder for chaining.
+     */
+    public Builder setCost(float value) {
+
+      cost_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The costs associated with the sale of a particular product. Used for gross
+     * profit reporting.
+     * * Profit = [price][google.cloud.retail.v2.PriceInfo.price] -
+     * [cost][google.cloud.retail.v2.PriceInfo.cost]
+     * Google Merchant Center property
+     * [cost_of_goods_sold](https://support.google.com/merchants/answer/9017895).
+     * </pre>
+     *
+     * <code>float cost = 4;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearCost() {
+
+      cost_ = 0F;
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.setUnknownFields(unknownFields);
+    }
+
+    @java.lang.Override
+    public final Builder mergeUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.mergeUnknownFields(unknownFields);
+    }
+
+    // @@protoc_insertion_point(builder_scope:google.cloud.retail.v2.PriceInfo)
+  }
+
+  // @@protoc_insertion_point(class_scope:google.cloud.retail.v2.PriceInfo)
+  private static final com.google.cloud.retail.v2.PriceInfo DEFAULT_INSTANCE;
+
+  static {
+    DEFAULT_INSTANCE = new com.google.cloud.retail.v2.PriceInfo();
+  }
+
+  public static com.google.cloud.retail.v2.PriceInfo getDefaultInstance() {
+    return DEFAULT_INSTANCE;
+  }
+
+  private static final com.google.protobuf.Parser<PriceInfo> PARSER =
+      new com.google.protobuf.AbstractParser<PriceInfo>() {
+        @java.lang.Override
+        public PriceInfo parsePartialFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws com.google.protobuf.InvalidProtocolBufferException {
+          return new PriceInfo(input, extensionRegistry);
+        }
+      };
+
+  public static com.google.protobuf.Parser<PriceInfo> parser() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.protobuf.Parser<PriceInfo> getParserForType() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.cloud.retail.v2.PriceInfo getDefaultInstanceForType() {
+    return DEFAULT_INSTANCE;
+  }
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/PriceInfoOrBuilder.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/PriceInfoOrBuilder.java
new file mode 100644
index 00000000..d8b05141
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/PriceInfoOrBuilder.java
@@ -0,0 +1,104 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/common.proto
+
+package com.google.cloud.retail.v2;
+
+public interface PriceInfoOrBuilder
+    extends
+    // @@protoc_insertion_point(interface_extends:google.cloud.retail.v2.PriceInfo)
+    com.google.protobuf.MessageOrBuilder {
+
+  /**
+   *
+   *
+   * <pre>
+   * The 3-letter currency code defined in [ISO
+   * 4217](https://www.iso.org/iso-4217-currency-codes.html).
+   * If this field is an unrecognizable currency code, an INVALID_ARGUMENT
+   * error is returned.
+   * </pre>
+   *
+   * <code>string currency_code = 1;</code>
+   *
+   * @return The currencyCode.
+   */
+  java.lang.String getCurrencyCode();
+  /**
+   *
+   *
+   * <pre>
+   * The 3-letter currency code defined in [ISO
+   * 4217](https://www.iso.org/iso-4217-currency-codes.html).
+   * If this field is an unrecognizable currency code, an INVALID_ARGUMENT
+   * error is returned.
+   * </pre>
+   *
+   * <code>string currency_code = 1;</code>
+   *
+   * @return The bytes for currencyCode.
+   */
+  com.google.protobuf.ByteString getCurrencyCodeBytes();
+
+  /**
+   *
+   *
+   * <pre>
+   * Price of the product.
+   * Google Merchant Center property
+   * [price](https://support.google.com/merchants/answer/6324371). Schema.org
+   * property [Offer.priceSpecification](https://schema.org/priceSpecification).
+   * </pre>
+   *
+   * <code>float price = 2;</code>
+   *
+   * @return The price.
+   */
+  float getPrice();
+
+  /**
+   *
+   *
+   * <pre>
+   * Price of the product without any discount. If zero, by default set to be
+   * the [price][google.cloud.retail.v2.PriceInfo.price].
+   * </pre>
+   *
+   * <code>float original_price = 3;</code>
+   *
+   * @return The originalPrice.
+   */
+  float getOriginalPrice();
+
+  /**
+   *
+   *
+   * <pre>
+   * The costs associated with the sale of a particular product. Used for gross
+   * profit reporting.
+   * * Profit = [price][google.cloud.retail.v2.PriceInfo.price] -
+   * [cost][google.cloud.retail.v2.PriceInfo.cost]
+   * Google Merchant Center property
+   * [cost_of_goods_sold](https://support.google.com/merchants/answer/9017895).
+   * </pre>
+   *
+   * <code>float cost = 4;</code>
+   *
+   * @return The cost.
+   */
+  float getCost();
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/Product.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/Product.java
new file mode 100644
index 00000000..4c5175c9
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/Product.java
@@ -0,0 +1,5543 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/product.proto
+
+package com.google.cloud.retail.v2;
+
+/**
+ *
+ *
+ * <pre>
+ * Product captures all metadata information of items to be recommended or
+ * searched.
+ * </pre>
+ *
+ * Protobuf type {@code google.cloud.retail.v2.Product}
+ */
+public final class Product extends com.google.protobuf.GeneratedMessageV3
+    implements
+    // @@protoc_insertion_point(message_implements:google.cloud.retail.v2.Product)
+    ProductOrBuilder {
+  private static final long serialVersionUID = 0L;
+  // Use Product.newBuilder() to construct.
+  private Product(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+    super(builder);
+  }
+
+  private Product() {
+    name_ = "";
+    id_ = "";
+    type_ = 0;
+    primaryProductId_ = "";
+    categories_ = com.google.protobuf.LazyStringArrayList.EMPTY;
+    title_ = "";
+    description_ = "";
+    tags_ = com.google.protobuf.LazyStringArrayList.EMPTY;
+    availability_ = 0;
+    uri_ = "";
+    images_ = java.util.Collections.emptyList();
+  }
+
+  @java.lang.Override
+  @SuppressWarnings({"unused"})
+  protected java.lang.Object newInstance(UnusedPrivateParameter unused) {
+    return new Product();
+  }
+
+  @java.lang.Override
+  public final com.google.protobuf.UnknownFieldSet getUnknownFields() {
+    return this.unknownFields;
+  }
+
+  private Product(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    this();
+    if (extensionRegistry == null) {
+      throw new java.lang.NullPointerException();
+    }
+    int mutable_bitField0_ = 0;
+    com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+        com.google.protobuf.UnknownFieldSet.newBuilder();
+    try {
+      boolean done = false;
+      while (!done) {
+        int tag = input.readTag();
+        switch (tag) {
+          case 0:
+            done = true;
+            break;
+          case 10:
+            {
+              java.lang.String s = input.readStringRequireUtf8();
+
+              name_ = s;
+              break;
+            }
+          case 18:
+            {
+              java.lang.String s = input.readStringRequireUtf8();
+
+              id_ = s;
+              break;
+            }
+          case 24:
+            {
+              int rawValue = input.readEnum();
+
+              type_ = rawValue;
+              break;
+            }
+          case 34:
+            {
+              java.lang.String s = input.readStringRequireUtf8();
+
+              primaryProductId_ = s;
+              break;
+            }
+          case 58:
+            {
+              java.lang.String s = input.readStringRequireUtf8();
+              if (!((mutable_bitField0_ & 0x00000001) != 0)) {
+                categories_ = new com.google.protobuf.LazyStringArrayList();
+                mutable_bitField0_ |= 0x00000001;
+              }
+              categories_.add(s);
+              break;
+            }
+          case 66:
+            {
+              java.lang.String s = input.readStringRequireUtf8();
+
+              title_ = s;
+              break;
+            }
+          case 82:
+            {
+              java.lang.String s = input.readStringRequireUtf8();
+
+              description_ = s;
+              break;
+            }
+          case 98:
+            {
+              if (!((mutable_bitField0_ & 0x00000002) != 0)) {
+                attributes_ =
+                    com.google.protobuf.MapField.newMapField(
+                        AttributesDefaultEntryHolder.defaultEntry);
+                mutable_bitField0_ |= 0x00000002;
+              }
+              com.google.protobuf.MapEntry<
+                      java.lang.String, com.google.cloud.retail.v2.CustomAttribute>
+                  attributes__ =
+                      input.readMessage(
+                          AttributesDefaultEntryHolder.defaultEntry.getParserForType(),
+                          extensionRegistry);
+              attributes_.getMutableMap().put(attributes__.getKey(), attributes__.getValue());
+              break;
+            }
+          case 106:
+            {
+              java.lang.String s = input.readStringRequireUtf8();
+              if (!((mutable_bitField0_ & 0x00000004) != 0)) {
+                tags_ = new com.google.protobuf.LazyStringArrayList();
+                mutable_bitField0_ |= 0x00000004;
+              }
+              tags_.add(s);
+              break;
+            }
+          case 114:
+            {
+              com.google.cloud.retail.v2.PriceInfo.Builder subBuilder = null;
+              if (priceInfo_ != null) {
+                subBuilder = priceInfo_.toBuilder();
+              }
+              priceInfo_ =
+                  input.readMessage(
+                      com.google.cloud.retail.v2.PriceInfo.parser(), extensionRegistry);
+              if (subBuilder != null) {
+                subBuilder.mergeFrom(priceInfo_);
+                priceInfo_ = subBuilder.buildPartial();
+              }
+
+              break;
+            }
+          case 146:
+            {
+              com.google.protobuf.Timestamp.Builder subBuilder = null;
+              if (availableTime_ != null) {
+                subBuilder = availableTime_.toBuilder();
+              }
+              availableTime_ =
+                  input.readMessage(com.google.protobuf.Timestamp.parser(), extensionRegistry);
+              if (subBuilder != null) {
+                subBuilder.mergeFrom(availableTime_);
+                availableTime_ = subBuilder.buildPartial();
+              }
+
+              break;
+            }
+          case 152:
+            {
+              int rawValue = input.readEnum();
+
+              availability_ = rawValue;
+              break;
+            }
+          case 162:
+            {
+              com.google.protobuf.Int32Value.Builder subBuilder = null;
+              if (availableQuantity_ != null) {
+                subBuilder = availableQuantity_.toBuilder();
+              }
+              availableQuantity_ =
+                  input.readMessage(com.google.protobuf.Int32Value.parser(), extensionRegistry);
+              if (subBuilder != null) {
+                subBuilder.mergeFrom(availableQuantity_);
+                availableQuantity_ = subBuilder.buildPartial();
+              }
+
+              break;
+            }
+          case 178:
+            {
+              java.lang.String s = input.readStringRequireUtf8();
+
+              uri_ = s;
+              break;
+            }
+          case 186:
+            {
+              if (!((mutable_bitField0_ & 0x00000008) != 0)) {
+                images_ = new java.util.ArrayList<com.google.cloud.retail.v2.Image>();
+                mutable_bitField0_ |= 0x00000008;
+              }
+              images_.add(
+                  input.readMessage(com.google.cloud.retail.v2.Image.parser(), extensionRegistry));
+              break;
+            }
+          default:
+            {
+              if (!parseUnknownField(input, unknownFields, extensionRegistry, tag)) {
+                done = true;
+              }
+              break;
+            }
+        }
+      }
+    } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+      throw e.setUnfinishedMessage(this);
+    } catch (java.io.IOException e) {
+      throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
+    } finally {
+      if (((mutable_bitField0_ & 0x00000001) != 0)) {
+        categories_ = categories_.getUnmodifiableView();
+      }
+      if (((mutable_bitField0_ & 0x00000004) != 0)) {
+        tags_ = tags_.getUnmodifiableView();
+      }
+      if (((mutable_bitField0_ & 0x00000008) != 0)) {
+        images_ = java.util.Collections.unmodifiableList(images_);
+      }
+      this.unknownFields = unknownFields.build();
+      makeExtensionsImmutable();
+    }
+  }
+
+  public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+    return com.google.cloud.retail.v2.ProductProto
+        .internal_static_google_cloud_retail_v2_Product_descriptor;
+  }
+
+  @SuppressWarnings({"rawtypes"})
+  @java.lang.Override
+  protected com.google.protobuf.MapField internalGetMapField(int number) {
+    switch (number) {
+      case 12:
+        return internalGetAttributes();
+      default:
+        throw new RuntimeException("Invalid map field number: " + number);
+    }
+  }
+
+  @java.lang.Override
+  protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internalGetFieldAccessorTable() {
+    return com.google.cloud.retail.v2.ProductProto
+        .internal_static_google_cloud_retail_v2_Product_fieldAccessorTable
+        .ensureFieldAccessorsInitialized(
+            com.google.cloud.retail.v2.Product.class,
+            com.google.cloud.retail.v2.Product.Builder.class);
+  }
+
+  /**
+   *
+   *
+   * <pre>
+   * The type of this product.
+   * </pre>
+   *
+   * Protobuf enum {@code google.cloud.retail.v2.Product.Type}
+   */
+  public enum Type implements com.google.protobuf.ProtocolMessageEnum {
+    /**
+     *
+     *
+     * <pre>
+     * Default value. Default to
+     * [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY] if unset.
+     * </pre>
+     *
+     * <code>TYPE_UNSPECIFIED = 0;</code>
+     */
+    TYPE_UNSPECIFIED(0),
+    /**
+     *
+     *
+     * <pre>
+     * The primary type.
+     * As the primary unit for predicting, indexing and search serving, a
+     * [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
+     * [Product][google.cloud.retail.v2.Product] is grouped with multiple
+     * [Type.VARIANT][google.cloud.retail.v2.Product.Type.VARIANT]
+     * [Product][google.cloud.retail.v2.Product]s.
+     * </pre>
+     *
+     * <code>PRIMARY = 1;</code>
+     */
+    PRIMARY(1),
+    /**
+     *
+     *
+     * <pre>
+     * The variant type.
+     * [Type.VARIANT][google.cloud.retail.v2.Product.Type.VARIANT]
+     * [Product][google.cloud.retail.v2.Product]s usually share some common
+     * attributes on the same
+     * [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
+     * [Product][google.cloud.retail.v2.Product]s, but they have variant
+     * attributes like different colors, sizes and prices, etc.
+     * </pre>
+     *
+     * <code>VARIANT = 2;</code>
+     */
+    VARIANT(2),
+    /**
+     *
+     *
+     * <pre>
+     * The collection type. Collection products are bundled
+     * [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
+     * [Product][google.cloud.retail.v2.Product]s or
+     * [Type.VARIANT][google.cloud.retail.v2.Product.Type.VARIANT]
+     * [Product][google.cloud.retail.v2.Product]s that are sold together, such
+     * as a jewelry set with necklaces, earrings and rings, etc.
+     * </pre>
+     *
+     * <code>COLLECTION = 3;</code>
+     */
+    COLLECTION(3),
+    UNRECOGNIZED(-1),
+    ;
+
+    /**
+     *
+     *
+     * <pre>
+     * Default value. Default to
+     * [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY] if unset.
+     * </pre>
+     *
+     * <code>TYPE_UNSPECIFIED = 0;</code>
+     */
+    public static final int TYPE_UNSPECIFIED_VALUE = 0;
+    /**
+     *
+     *
+     * <pre>
+     * The primary type.
+     * As the primary unit for predicting, indexing and search serving, a
+     * [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
+     * [Product][google.cloud.retail.v2.Product] is grouped with multiple
+     * [Type.VARIANT][google.cloud.retail.v2.Product.Type.VARIANT]
+     * [Product][google.cloud.retail.v2.Product]s.
+     * </pre>
+     *
+     * <code>PRIMARY = 1;</code>
+     */
+    public static final int PRIMARY_VALUE = 1;
+    /**
+     *
+     *
+     * <pre>
+     * The variant type.
+     * [Type.VARIANT][google.cloud.retail.v2.Product.Type.VARIANT]
+     * [Product][google.cloud.retail.v2.Product]s usually share some common
+     * attributes on the same
+     * [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
+     * [Product][google.cloud.retail.v2.Product]s, but they have variant
+     * attributes like different colors, sizes and prices, etc.
+     * </pre>
+     *
+     * <code>VARIANT = 2;</code>
+     */
+    public static final int VARIANT_VALUE = 2;
+    /**
+     *
+     *
+     * <pre>
+     * The collection type. Collection products are bundled
+     * [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
+     * [Product][google.cloud.retail.v2.Product]s or
+     * [Type.VARIANT][google.cloud.retail.v2.Product.Type.VARIANT]
+     * [Product][google.cloud.retail.v2.Product]s that are sold together, such
+     * as a jewelry set with necklaces, earrings and rings, etc.
+     * </pre>
+     *
+     * <code>COLLECTION = 3;</code>
+     */
+    public static final int COLLECTION_VALUE = 3;
+
+    public final int getNumber() {
+      if (this == UNRECOGNIZED) {
+        throw new java.lang.IllegalArgumentException(
+            "Can't get the number of an unknown enum value.");
+      }
+      return value;
+    }
+
+    /**
+     * @param value The numeric wire value of the corresponding enum entry.
+     * @return The enum associated with the given numeric wire value.
+     * @deprecated Use {@link #forNumber(int)} instead.
+     */
+    @java.lang.Deprecated
+    public static Type valueOf(int value) {
+      return forNumber(value);
+    }
+
+    /**
+     * @param value The numeric wire value of the corresponding enum entry.
+     * @return The enum associated with the given numeric wire value.
+     */
+    public static Type forNumber(int value) {
+      switch (value) {
+        case 0:
+          return TYPE_UNSPECIFIED;
+        case 1:
+          return PRIMARY;
+        case 2:
+          return VARIANT;
+        case 3:
+          return COLLECTION;
+        default:
+          return null;
+      }
+    }
+
+    public static com.google.protobuf.Internal.EnumLiteMap<Type> internalGetValueMap() {
+      return internalValueMap;
+    }
+
+    private static final com.google.protobuf.Internal.EnumLiteMap<Type> internalValueMap =
+        new com.google.protobuf.Internal.EnumLiteMap<Type>() {
+          public Type findValueByNumber(int number) {
+            return Type.forNumber(number);
+          }
+        };
+
+    public final com.google.protobuf.Descriptors.EnumValueDescriptor getValueDescriptor() {
+      if (this == UNRECOGNIZED) {
+        throw new java.lang.IllegalStateException(
+            "Can't get the descriptor of an unrecognized enum value.");
+      }
+      return getDescriptor().getValues().get(ordinal());
+    }
+
+    public final com.google.protobuf.Descriptors.EnumDescriptor getDescriptorForType() {
+      return getDescriptor();
+    }
+
+    public static final com.google.protobuf.Descriptors.EnumDescriptor getDescriptor() {
+      return com.google.cloud.retail.v2.Product.getDescriptor().getEnumTypes().get(0);
+    }
+
+    private static final Type[] VALUES = values();
+
+    public static Type valueOf(com.google.protobuf.Descriptors.EnumValueDescriptor desc) {
+      if (desc.getType() != getDescriptor()) {
+        throw new java.lang.IllegalArgumentException("EnumValueDescriptor is not for this type.");
+      }
+      if (desc.getIndex() == -1) {
+        return UNRECOGNIZED;
+      }
+      return VALUES[desc.getIndex()];
+    }
+
+    private final int value;
+
+    private Type(int value) {
+      this.value = value;
+    }
+
+    // @@protoc_insertion_point(enum_scope:google.cloud.retail.v2.Product.Type)
+  }
+
+  /**
+   *
+   *
+   * <pre>
+   * Product availability. If this field is unspecified, the product is
+   * assumed to be in stock.
+   * </pre>
+   *
+   * Protobuf enum {@code google.cloud.retail.v2.Product.Availability}
+   */
+  public enum Availability implements com.google.protobuf.ProtocolMessageEnum {
+    /**
+     *
+     *
+     * <pre>
+     * Default product availability. Default to
+     * [Availability.IN_STOCK][google.cloud.retail.v2.Product.Availability.IN_STOCK]
+     * if unset.
+     * </pre>
+     *
+     * <code>AVAILABILITY_UNSPECIFIED = 0;</code>
+     */
+    AVAILABILITY_UNSPECIFIED(0),
+    /**
+     *
+     *
+     * <pre>
+     * Product in stock.
+     * </pre>
+     *
+     * <code>IN_STOCK = 1;</code>
+     */
+    IN_STOCK(1),
+    /**
+     *
+     *
+     * <pre>
+     * Product out of stock.
+     * </pre>
+     *
+     * <code>OUT_OF_STOCK = 2;</code>
+     */
+    OUT_OF_STOCK(2),
+    /**
+     *
+     *
+     * <pre>
+     * Product that is in pre-order state.
+     * </pre>
+     *
+     * <code>PREORDER = 3;</code>
+     */
+    PREORDER(3),
+    /**
+     *
+     *
+     * <pre>
+     * Product that is back-ordered (i.e. temporarily out of stock).
+     * </pre>
+     *
+     * <code>BACKORDER = 4;</code>
+     */
+    BACKORDER(4),
+    UNRECOGNIZED(-1),
+    ;
+
+    /**
+     *
+     *
+     * <pre>
+     * Default product availability. Default to
+     * [Availability.IN_STOCK][google.cloud.retail.v2.Product.Availability.IN_STOCK]
+     * if unset.
+     * </pre>
+     *
+     * <code>AVAILABILITY_UNSPECIFIED = 0;</code>
+     */
+    public static final int AVAILABILITY_UNSPECIFIED_VALUE = 0;
+    /**
+     *
+     *
+     * <pre>
+     * Product in stock.
+     * </pre>
+     *
+     * <code>IN_STOCK = 1;</code>
+     */
+    public static final int IN_STOCK_VALUE = 1;
+    /**
+     *
+     *
+     * <pre>
+     * Product out of stock.
+     * </pre>
+     *
+     * <code>OUT_OF_STOCK = 2;</code>
+     */
+    public static final int OUT_OF_STOCK_VALUE = 2;
+    /**
+     *
+     *
+     * <pre>
+     * Product that is in pre-order state.
+     * </pre>
+     *
+     * <code>PREORDER = 3;</code>
+     */
+    public static final int PREORDER_VALUE = 3;
+    /**
+     *
+     *
+     * <pre>
+     * Product that is back-ordered (i.e. temporarily out of stock).
+     * </pre>
+     *
+     * <code>BACKORDER = 4;</code>
+     */
+    public static final int BACKORDER_VALUE = 4;
+
+    public final int getNumber() {
+      if (this == UNRECOGNIZED) {
+        throw new java.lang.IllegalArgumentException(
+            "Can't get the number of an unknown enum value.");
+      }
+      return value;
+    }
+
+    /**
+     * @param value The numeric wire value of the corresponding enum entry.
+     * @return The enum associated with the given numeric wire value.
+     * @deprecated Use {@link #forNumber(int)} instead.
+     */
+    @java.lang.Deprecated
+    public static Availability valueOf(int value) {
+      return forNumber(value);
+    }
+
+    /**
+     * @param value The numeric wire value of the corresponding enum entry.
+     * @return The enum associated with the given numeric wire value.
+     */
+    public static Availability forNumber(int value) {
+      switch (value) {
+        case 0:
+          return AVAILABILITY_UNSPECIFIED;
+        case 1:
+          return IN_STOCK;
+        case 2:
+          return OUT_OF_STOCK;
+        case 3:
+          return PREORDER;
+        case 4:
+          return BACKORDER;
+        default:
+          return null;
+      }
+    }
+
+    public static com.google.protobuf.Internal.EnumLiteMap<Availability> internalGetValueMap() {
+      return internalValueMap;
+    }
+
+    private static final com.google.protobuf.Internal.EnumLiteMap<Availability> internalValueMap =
+        new com.google.protobuf.Internal.EnumLiteMap<Availability>() {
+          public Availability findValueByNumber(int number) {
+            return Availability.forNumber(number);
+          }
+        };
+
+    public final com.google.protobuf.Descriptors.EnumValueDescriptor getValueDescriptor() {
+      if (this == UNRECOGNIZED) {
+        throw new java.lang.IllegalStateException(
+            "Can't get the descriptor of an unrecognized enum value.");
+      }
+      return getDescriptor().getValues().get(ordinal());
+    }
+
+    public final com.google.protobuf.Descriptors.EnumDescriptor getDescriptorForType() {
+      return getDescriptor();
+    }
+
+    public static final com.google.protobuf.Descriptors.EnumDescriptor getDescriptor() {
+      return com.google.cloud.retail.v2.Product.getDescriptor().getEnumTypes().get(1);
+    }
+
+    private static final Availability[] VALUES = values();
+
+    public static Availability valueOf(com.google.protobuf.Descriptors.EnumValueDescriptor desc) {
+      if (desc.getType() != getDescriptor()) {
+        throw new java.lang.IllegalArgumentException("EnumValueDescriptor is not for this type.");
+      }
+      if (desc.getIndex() == -1) {
+        return UNRECOGNIZED;
+      }
+      return VALUES[desc.getIndex()];
+    }
+
+    private final int value;
+
+    private Availability(int value) {
+      this.value = value;
+    }
+
+    // @@protoc_insertion_point(enum_scope:google.cloud.retail.v2.Product.Availability)
+  }
+
+  public static final int NAME_FIELD_NUMBER = 1;
+  private volatile java.lang.Object name_;
+  /**
+   *
+   *
+   * <pre>
+   * Immutable. Full resource name of the product, such as
+   * "projects/&#42;&#47;locations/global/catalogs/default_catalog/branches/default_branch/products/product_id".
+   * The branch ID must be "default_branch".
+   * </pre>
+   *
+   * <code>string name = 1 [(.google.api.field_behavior) = IMMUTABLE];</code>
+   *
+   * @return The name.
+   */
+  @java.lang.Override
+  public java.lang.String getName() {
+    java.lang.Object ref = name_;
+    if (ref instanceof java.lang.String) {
+      return (java.lang.String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+      java.lang.String s = bs.toStringUtf8();
+      name_ = s;
+      return s;
+    }
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Immutable. Full resource name of the product, such as
+   * "projects/&#42;&#47;locations/global/catalogs/default_catalog/branches/default_branch/products/product_id".
+   * The branch ID must be "default_branch".
+   * </pre>
+   *
+   * <code>string name = 1 [(.google.api.field_behavior) = IMMUTABLE];</code>
+   *
+   * @return The bytes for name.
+   */
+  @java.lang.Override
+  public com.google.protobuf.ByteString getNameBytes() {
+    java.lang.Object ref = name_;
+    if (ref instanceof java.lang.String) {
+      com.google.protobuf.ByteString b =
+          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+      name_ = b;
+      return b;
+    } else {
+      return (com.google.protobuf.ByteString) ref;
+    }
+  }
+
+  public static final int ID_FIELD_NUMBER = 2;
+  private volatile java.lang.Object id_;
+  /**
+   *
+   *
+   * <pre>
+   * Immutable. [Product][google.cloud.retail.v2.Product] identifier, which is
+   * the final component of [name][google.cloud.retail.v2.Product.name]. For
+   * example, this field is "id_1", if
+   * [name][google.cloud.retail.v2.Product.name] is
+   * "projects/&#42;&#47;locations/global/catalogs/default_catalog/branches/default_branch/products/id_1".
+   * This field must be a UTF-8 encoded string with a length limit of 128
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * Google Merchant Center property
+   * [id](https://support.google.com/merchants/answer/6324405). Schema.org
+   * Property [Product.sku](https://schema.org/sku).
+   * </pre>
+   *
+   * <code>string id = 2 [(.google.api.field_behavior) = IMMUTABLE];</code>
+   *
+   * @return The id.
+   */
+  @java.lang.Override
+  public java.lang.String getId() {
+    java.lang.Object ref = id_;
+    if (ref instanceof java.lang.String) {
+      return (java.lang.String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+      java.lang.String s = bs.toStringUtf8();
+      id_ = s;
+      return s;
+    }
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Immutable. [Product][google.cloud.retail.v2.Product] identifier, which is
+   * the final component of [name][google.cloud.retail.v2.Product.name]. For
+   * example, this field is "id_1", if
+   * [name][google.cloud.retail.v2.Product.name] is
+   * "projects/&#42;&#47;locations/global/catalogs/default_catalog/branches/default_branch/products/id_1".
+   * This field must be a UTF-8 encoded string with a length limit of 128
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * Google Merchant Center property
+   * [id](https://support.google.com/merchants/answer/6324405). Schema.org
+   * Property [Product.sku](https://schema.org/sku).
+   * </pre>
+   *
+   * <code>string id = 2 [(.google.api.field_behavior) = IMMUTABLE];</code>
+   *
+   * @return The bytes for id.
+   */
+  @java.lang.Override
+  public com.google.protobuf.ByteString getIdBytes() {
+    java.lang.Object ref = id_;
+    if (ref instanceof java.lang.String) {
+      com.google.protobuf.ByteString b =
+          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+      id_ = b;
+      return b;
+    } else {
+      return (com.google.protobuf.ByteString) ref;
+    }
+  }
+
+  public static final int TYPE_FIELD_NUMBER = 3;
+  private int type_;
+  /**
+   *
+   *
+   * <pre>
+   * Immutable. The type of the product. This field is output-only.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.Product.Type type = 3 [(.google.api.field_behavior) = IMMUTABLE];
+   * </code>
+   *
+   * @return The enum numeric value on the wire for type.
+   */
+  @java.lang.Override
+  public int getTypeValue() {
+    return type_;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Immutable. The type of the product. This field is output-only.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.Product.Type type = 3 [(.google.api.field_behavior) = IMMUTABLE];
+   * </code>
+   *
+   * @return The type.
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.Product.Type getType() {
+    @SuppressWarnings("deprecation")
+    com.google.cloud.retail.v2.Product.Type result =
+        com.google.cloud.retail.v2.Product.Type.valueOf(type_);
+    return result == null ? com.google.cloud.retail.v2.Product.Type.UNRECOGNIZED : result;
+  }
+
+  public static final int PRIMARY_PRODUCT_ID_FIELD_NUMBER = 4;
+  private volatile java.lang.Object primaryProductId_;
+  /**
+   *
+   *
+   * <pre>
+   * Variant group identifier. Must be an
+   * [id][google.cloud.retail.v2.Product.id], with the same parent branch with
+   * this product. Otherwise, an error is thrown.
+   * For [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
+   * [Product][google.cloud.retail.v2.Product]s, this field can only be empty or
+   * set to the same value as [id][google.cloud.retail.v2.Product.id].
+   * For VARIANT [Product][google.cloud.retail.v2.Product]s, this field cannot
+   * be empty. A maximum of 2,000 products are allowed to share the same
+   * [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
+   * [Product][google.cloud.retail.v2.Product]. Otherwise, an INVALID_ARGUMENT
+   * error is returned.
+   * Google Merchant Center Property
+   * [item_group_id](https://support.google.com/merchants/answer/6324507).
+   * Schema.org Property
+   * [Product.inProductGroupWithID](https://schema.org/inProductGroupWithID).
+   * This field must be enabled before it can be used. [Learn
+   * more](/recommendations-ai/docs/catalog#item-group-id).
+   * </pre>
+   *
+   * <code>string primary_product_id = 4;</code>
+   *
+   * @return The primaryProductId.
+   */
+  @java.lang.Override
+  public java.lang.String getPrimaryProductId() {
+    java.lang.Object ref = primaryProductId_;
+    if (ref instanceof java.lang.String) {
+      return (java.lang.String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+      java.lang.String s = bs.toStringUtf8();
+      primaryProductId_ = s;
+      return s;
+    }
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Variant group identifier. Must be an
+   * [id][google.cloud.retail.v2.Product.id], with the same parent branch with
+   * this product. Otherwise, an error is thrown.
+   * For [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
+   * [Product][google.cloud.retail.v2.Product]s, this field can only be empty or
+   * set to the same value as [id][google.cloud.retail.v2.Product.id].
+   * For VARIANT [Product][google.cloud.retail.v2.Product]s, this field cannot
+   * be empty. A maximum of 2,000 products are allowed to share the same
+   * [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
+   * [Product][google.cloud.retail.v2.Product]. Otherwise, an INVALID_ARGUMENT
+   * error is returned.
+   * Google Merchant Center Property
+   * [item_group_id](https://support.google.com/merchants/answer/6324507).
+   * Schema.org Property
+   * [Product.inProductGroupWithID](https://schema.org/inProductGroupWithID).
+   * This field must be enabled before it can be used. [Learn
+   * more](/recommendations-ai/docs/catalog#item-group-id).
+   * </pre>
+   *
+   * <code>string primary_product_id = 4;</code>
+   *
+   * @return The bytes for primaryProductId.
+   */
+  @java.lang.Override
+  public com.google.protobuf.ByteString getPrimaryProductIdBytes() {
+    java.lang.Object ref = primaryProductId_;
+    if (ref instanceof java.lang.String) {
+      com.google.protobuf.ByteString b =
+          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+      primaryProductId_ = b;
+      return b;
+    } else {
+      return (com.google.protobuf.ByteString) ref;
+    }
+  }
+
+  public static final int CATEGORIES_FIELD_NUMBER = 7;
+  private com.google.protobuf.LazyStringList categories_;
+  /**
+   *
+   *
+   * <pre>
+   * Product categories. This field is repeated for supporting one product
+   * belonging to several parallel categories. Strongly recommended using the
+   * full path for better search / recommendation quality.
+   * To represent full path of category, use '&gt;' sign to separate different
+   * hierarchies. If '&gt;' is part of the category name, please replace it with
+   * other character(s).
+   * For example, if a shoes product belongs to both
+   * ["Shoes &amp; Accessories" -&gt; "Shoes"] and
+   * ["Sports &amp; Fitness" -&gt; "Athletic Clothing" -&gt; "Shoes"], it could be
+   * represented as:
+   *      "categories": [
+   *        "Shoes &amp; Accessories &gt; Shoes",
+   *        "Sports &amp; Fitness &gt; Athletic Clothing &gt; Shoes"
+   *      ]
+   * Must be set for [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
+   * [Product][google.cloud.retail.v2.Product] otherwise an INVALID_ARGUMENT
+   * error is returned.
+   * At most 250 values are allowed per
+   * [Product][google.cloud.retail.v2.Product]. Empty values are not allowed.
+   * Each value must be a UTF-8 encoded string with a length limit of 5,000
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * Google Merchant Center property
+   * [google_product_category][mc_google_product_category]. Schema.org property
+   * [Product.category] (https://schema.org/category).
+   * [mc_google_product_category]:
+   * https://support.google.com/merchants/answer/6324436
+   * </pre>
+   *
+   * <code>repeated string categories = 7;</code>
+   *
+   * @return A list containing the categories.
+   */
+  public com.google.protobuf.ProtocolStringList getCategoriesList() {
+    return categories_;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Product categories. This field is repeated for supporting one product
+   * belonging to several parallel categories. Strongly recommended using the
+   * full path for better search / recommendation quality.
+   * To represent full path of category, use '&gt;' sign to separate different
+   * hierarchies. If '&gt;' is part of the category name, please replace it with
+   * other character(s).
+   * For example, if a shoes product belongs to both
+   * ["Shoes &amp; Accessories" -&gt; "Shoes"] and
+   * ["Sports &amp; Fitness" -&gt; "Athletic Clothing" -&gt; "Shoes"], it could be
+   * represented as:
+   *      "categories": [
+   *        "Shoes &amp; Accessories &gt; Shoes",
+   *        "Sports &amp; Fitness &gt; Athletic Clothing &gt; Shoes"
+   *      ]
+   * Must be set for [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
+   * [Product][google.cloud.retail.v2.Product] otherwise an INVALID_ARGUMENT
+   * error is returned.
+   * At most 250 values are allowed per
+   * [Product][google.cloud.retail.v2.Product]. Empty values are not allowed.
+   * Each value must be a UTF-8 encoded string with a length limit of 5,000
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * Google Merchant Center property
+   * [google_product_category][mc_google_product_category]. Schema.org property
+   * [Product.category] (https://schema.org/category).
+   * [mc_google_product_category]:
+   * https://support.google.com/merchants/answer/6324436
+   * </pre>
+   *
+   * <code>repeated string categories = 7;</code>
+   *
+   * @return The count of categories.
+   */
+  public int getCategoriesCount() {
+    return categories_.size();
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Product categories. This field is repeated for supporting one product
+   * belonging to several parallel categories. Strongly recommended using the
+   * full path for better search / recommendation quality.
+   * To represent full path of category, use '&gt;' sign to separate different
+   * hierarchies. If '&gt;' is part of the category name, please replace it with
+   * other character(s).
+   * For example, if a shoes product belongs to both
+   * ["Shoes &amp; Accessories" -&gt; "Shoes"] and
+   * ["Sports &amp; Fitness" -&gt; "Athletic Clothing" -&gt; "Shoes"], it could be
+   * represented as:
+   *      "categories": [
+   *        "Shoes &amp; Accessories &gt; Shoes",
+   *        "Sports &amp; Fitness &gt; Athletic Clothing &gt; Shoes"
+   *      ]
+   * Must be set for [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
+   * [Product][google.cloud.retail.v2.Product] otherwise an INVALID_ARGUMENT
+   * error is returned.
+   * At most 250 values are allowed per
+   * [Product][google.cloud.retail.v2.Product]. Empty values are not allowed.
+   * Each value must be a UTF-8 encoded string with a length limit of 5,000
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * Google Merchant Center property
+   * [google_product_category][mc_google_product_category]. Schema.org property
+   * [Product.category] (https://schema.org/category).
+   * [mc_google_product_category]:
+   * https://support.google.com/merchants/answer/6324436
+   * </pre>
+   *
+   * <code>repeated string categories = 7;</code>
+   *
+   * @param index The index of the element to return.
+   * @return The categories at the given index.
+   */
+  public java.lang.String getCategories(int index) {
+    return categories_.get(index);
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Product categories. This field is repeated for supporting one product
+   * belonging to several parallel categories. Strongly recommended using the
+   * full path for better search / recommendation quality.
+   * To represent full path of category, use '&gt;' sign to separate different
+   * hierarchies. If '&gt;' is part of the category name, please replace it with
+   * other character(s).
+   * For example, if a shoes product belongs to both
+   * ["Shoes &amp; Accessories" -&gt; "Shoes"] and
+   * ["Sports &amp; Fitness" -&gt; "Athletic Clothing" -&gt; "Shoes"], it could be
+   * represented as:
+   *      "categories": [
+   *        "Shoes &amp; Accessories &gt; Shoes",
+   *        "Sports &amp; Fitness &gt; Athletic Clothing &gt; Shoes"
+   *      ]
+   * Must be set for [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
+   * [Product][google.cloud.retail.v2.Product] otherwise an INVALID_ARGUMENT
+   * error is returned.
+   * At most 250 values are allowed per
+   * [Product][google.cloud.retail.v2.Product]. Empty values are not allowed.
+   * Each value must be a UTF-8 encoded string with a length limit of 5,000
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * Google Merchant Center property
+   * [google_product_category][mc_google_product_category]. Schema.org property
+   * [Product.category] (https://schema.org/category).
+   * [mc_google_product_category]:
+   * https://support.google.com/merchants/answer/6324436
+   * </pre>
+   *
+   * <code>repeated string categories = 7;</code>
+   *
+   * @param index The index of the value to return.
+   * @return The bytes of the categories at the given index.
+   */
+  public com.google.protobuf.ByteString getCategoriesBytes(int index) {
+    return categories_.getByteString(index);
+  }
+
+  public static final int TITLE_FIELD_NUMBER = 8;
+  private volatile java.lang.Object title_;
+  /**
+   *
+   *
+   * <pre>
+   * Required. Product title.
+   * This field must be a UTF-8 encoded string with a length limit of 128
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * Google Merchant Center property
+   * [title](https://support.google.com/merchants/answer/6324415). Schema.org
+   * property [Product.name](https://schema.org/name).
+   * </pre>
+   *
+   * <code>string title = 8 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The title.
+   */
+  @java.lang.Override
+  public java.lang.String getTitle() {
+    java.lang.Object ref = title_;
+    if (ref instanceof java.lang.String) {
+      return (java.lang.String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+      java.lang.String s = bs.toStringUtf8();
+      title_ = s;
+      return s;
+    }
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Required. Product title.
+   * This field must be a UTF-8 encoded string with a length limit of 128
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * Google Merchant Center property
+   * [title](https://support.google.com/merchants/answer/6324415). Schema.org
+   * property [Product.name](https://schema.org/name).
+   * </pre>
+   *
+   * <code>string title = 8 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The bytes for title.
+   */
+  @java.lang.Override
+  public com.google.protobuf.ByteString getTitleBytes() {
+    java.lang.Object ref = title_;
+    if (ref instanceof java.lang.String) {
+      com.google.protobuf.ByteString b =
+          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+      title_ = b;
+      return b;
+    } else {
+      return (com.google.protobuf.ByteString) ref;
+    }
+  }
+
+  public static final int DESCRIPTION_FIELD_NUMBER = 10;
+  private volatile java.lang.Object description_;
+  /**
+   *
+   *
+   * <pre>
+   * Product description.
+   * This field must be a UTF-8 encoded string with a length limit of 5,000
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * Google Merchant Center property
+   * [description](https://support.google.com/merchants/answer/6324468).
+   * schema.org property [Product.description](https://schema.org/description).
+   * </pre>
+   *
+   * <code>string description = 10;</code>
+   *
+   * @return The description.
+   */
+  @java.lang.Override
+  public java.lang.String getDescription() {
+    java.lang.Object ref = description_;
+    if (ref instanceof java.lang.String) {
+      return (java.lang.String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+      java.lang.String s = bs.toStringUtf8();
+      description_ = s;
+      return s;
+    }
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Product description.
+   * This field must be a UTF-8 encoded string with a length limit of 5,000
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * Google Merchant Center property
+   * [description](https://support.google.com/merchants/answer/6324468).
+   * schema.org property [Product.description](https://schema.org/description).
+   * </pre>
+   *
+   * <code>string description = 10;</code>
+   *
+   * @return The bytes for description.
+   */
+  @java.lang.Override
+  public com.google.protobuf.ByteString getDescriptionBytes() {
+    java.lang.Object ref = description_;
+    if (ref instanceof java.lang.String) {
+      com.google.protobuf.ByteString b =
+          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+      description_ = b;
+      return b;
+    } else {
+      return (com.google.protobuf.ByteString) ref;
+    }
+  }
+
+  public static final int ATTRIBUTES_FIELD_NUMBER = 12;
+
+  private static final class AttributesDefaultEntryHolder {
+    static final com.google.protobuf.MapEntry<
+            java.lang.String, com.google.cloud.retail.v2.CustomAttribute>
+        defaultEntry =
+            com.google.protobuf.MapEntry
+                .<java.lang.String, com.google.cloud.retail.v2.CustomAttribute>newDefaultInstance(
+                    com.google.cloud.retail.v2.ProductProto
+                        .internal_static_google_cloud_retail_v2_Product_AttributesEntry_descriptor,
+                    com.google.protobuf.WireFormat.FieldType.STRING,
+                    "",
+                    com.google.protobuf.WireFormat.FieldType.MESSAGE,
+                    com.google.cloud.retail.v2.CustomAttribute.getDefaultInstance());
+  }
+
+  private com.google.protobuf.MapField<java.lang.String, com.google.cloud.retail.v2.CustomAttribute>
+      attributes_;
+
+  private com.google.protobuf.MapField<java.lang.String, com.google.cloud.retail.v2.CustomAttribute>
+      internalGetAttributes() {
+    if (attributes_ == null) {
+      return com.google.protobuf.MapField.emptyMapField(AttributesDefaultEntryHolder.defaultEntry);
+    }
+    return attributes_;
+  }
+
+  public int getAttributesCount() {
+    return internalGetAttributes().getMap().size();
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Highly encouraged. Extra product attributes to be included. For example,
+   * for products, this could include the store name, vendor, style, color, etc.
+   * These are very strong signals for recommendation model, thus we highly
+   * recommend providing the attributes here.
+   * Features that can take on one of a limited number of possible values. Two
+   * types of features can be set are:
+   * Textual features. some examples would be the brand/maker of a product, or
+   * country of a customer. Numerical features. Some examples would be the
+   * height/weight of a product, or age of a customer.
+   * For example: `{ "vendor": {"text": ["vendor123", "vendor456"]},
+   * "lengths_cm": {"numbers":[2.3, 15.4]}, "heights_cm": {"numbers":[8.1, 6.4]}
+   * }`.
+   * A maximum of 150 attributes are allowed. Otherwise, an INVALID_ARGUMENT
+   * error is returned.
+   * The key must be a UTF-8 encoded string with a length limit of 5,000
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * </pre>
+   *
+   * <code>map&lt;string, .google.cloud.retail.v2.CustomAttribute&gt; attributes = 12;</code>
+   */
+  @java.lang.Override
+  public boolean containsAttributes(java.lang.String key) {
+    if (key == null) {
+      throw new java.lang.NullPointerException();
+    }
+    return internalGetAttributes().getMap().containsKey(key);
+  }
+  /** Use {@link #getAttributesMap()} instead. */
+  @java.lang.Override
+  @java.lang.Deprecated
+  public java.util.Map<java.lang.String, com.google.cloud.retail.v2.CustomAttribute>
+      getAttributes() {
+    return getAttributesMap();
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Highly encouraged. Extra product attributes to be included. For example,
+   * for products, this could include the store name, vendor, style, color, etc.
+   * These are very strong signals for recommendation model, thus we highly
+   * recommend providing the attributes here.
+   * Features that can take on one of a limited number of possible values. Two
+   * types of features can be set are:
+   * Textual features. some examples would be the brand/maker of a product, or
+   * country of a customer. Numerical features. Some examples would be the
+   * height/weight of a product, or age of a customer.
+   * For example: `{ "vendor": {"text": ["vendor123", "vendor456"]},
+   * "lengths_cm": {"numbers":[2.3, 15.4]}, "heights_cm": {"numbers":[8.1, 6.4]}
+   * }`.
+   * A maximum of 150 attributes are allowed. Otherwise, an INVALID_ARGUMENT
+   * error is returned.
+   * The key must be a UTF-8 encoded string with a length limit of 5,000
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * </pre>
+   *
+   * <code>map&lt;string, .google.cloud.retail.v2.CustomAttribute&gt; attributes = 12;</code>
+   */
+  @java.lang.Override
+  public java.util.Map<java.lang.String, com.google.cloud.retail.v2.CustomAttribute>
+      getAttributesMap() {
+    return internalGetAttributes().getMap();
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Highly encouraged. Extra product attributes to be included. For example,
+   * for products, this could include the store name, vendor, style, color, etc.
+   * These are very strong signals for recommendation model, thus we highly
+   * recommend providing the attributes here.
+   * Features that can take on one of a limited number of possible values. Two
+   * types of features can be set are:
+   * Textual features. some examples would be the brand/maker of a product, or
+   * country of a customer. Numerical features. Some examples would be the
+   * height/weight of a product, or age of a customer.
+   * For example: `{ "vendor": {"text": ["vendor123", "vendor456"]},
+   * "lengths_cm": {"numbers":[2.3, 15.4]}, "heights_cm": {"numbers":[8.1, 6.4]}
+   * }`.
+   * A maximum of 150 attributes are allowed. Otherwise, an INVALID_ARGUMENT
+   * error is returned.
+   * The key must be a UTF-8 encoded string with a length limit of 5,000
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * </pre>
+   *
+   * <code>map&lt;string, .google.cloud.retail.v2.CustomAttribute&gt; attributes = 12;</code>
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.CustomAttribute getAttributesOrDefault(
+      java.lang.String key, com.google.cloud.retail.v2.CustomAttribute defaultValue) {
+    if (key == null) {
+      throw new java.lang.NullPointerException();
+    }
+    java.util.Map<java.lang.String, com.google.cloud.retail.v2.CustomAttribute> map =
+        internalGetAttributes().getMap();
+    return map.containsKey(key) ? map.get(key) : defaultValue;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Highly encouraged. Extra product attributes to be included. For example,
+   * for products, this could include the store name, vendor, style, color, etc.
+   * These are very strong signals for recommendation model, thus we highly
+   * recommend providing the attributes here.
+   * Features that can take on one of a limited number of possible values. Two
+   * types of features can be set are:
+   * Textual features. some examples would be the brand/maker of a product, or
+   * country of a customer. Numerical features. Some examples would be the
+   * height/weight of a product, or age of a customer.
+   * For example: `{ "vendor": {"text": ["vendor123", "vendor456"]},
+   * "lengths_cm": {"numbers":[2.3, 15.4]}, "heights_cm": {"numbers":[8.1, 6.4]}
+   * }`.
+   * A maximum of 150 attributes are allowed. Otherwise, an INVALID_ARGUMENT
+   * error is returned.
+   * The key must be a UTF-8 encoded string with a length limit of 5,000
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * </pre>
+   *
+   * <code>map&lt;string, .google.cloud.retail.v2.CustomAttribute&gt; attributes = 12;</code>
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.CustomAttribute getAttributesOrThrow(java.lang.String key) {
+    if (key == null) {
+      throw new java.lang.NullPointerException();
+    }
+    java.util.Map<java.lang.String, com.google.cloud.retail.v2.CustomAttribute> map =
+        internalGetAttributes().getMap();
+    if (!map.containsKey(key)) {
+      throw new java.lang.IllegalArgumentException();
+    }
+    return map.get(key);
+  }
+
+  public static final int TAGS_FIELD_NUMBER = 13;
+  private com.google.protobuf.LazyStringList tags_;
+  /**
+   *
+   *
+   * <pre>
+   * Custom tags associated with the product.
+   * At most 250 values are allowed per
+   * [Product][google.cloud.retail.v2.Product]. This value must be a UTF-8
+   * encoded string with a length limit of 1,000 characters. Otherwise, an
+   * INVALID_ARGUMENT error is returned.
+   * This tag can be used for filtering recommendation results by passing the
+   * tag as part of the
+   * [PredictRequest.filter][google.cloud.retail.v2.PredictRequest.filter].
+   * Google Merchant Center property
+   * [custom_label_0–4](https://support.google.com/merchants/answer/6324473).
+   * </pre>
+   *
+   * <code>repeated string tags = 13;</code>
+   *
+   * @return A list containing the tags.
+   */
+  public com.google.protobuf.ProtocolStringList getTagsList() {
+    return tags_;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Custom tags associated with the product.
+   * At most 250 values are allowed per
+   * [Product][google.cloud.retail.v2.Product]. This value must be a UTF-8
+   * encoded string with a length limit of 1,000 characters. Otherwise, an
+   * INVALID_ARGUMENT error is returned.
+   * This tag can be used for filtering recommendation results by passing the
+   * tag as part of the
+   * [PredictRequest.filter][google.cloud.retail.v2.PredictRequest.filter].
+   * Google Merchant Center property
+   * [custom_label_0–4](https://support.google.com/merchants/answer/6324473).
+   * </pre>
+   *
+   * <code>repeated string tags = 13;</code>
+   *
+   * @return The count of tags.
+   */
+  public int getTagsCount() {
+    return tags_.size();
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Custom tags associated with the product.
+   * At most 250 values are allowed per
+   * [Product][google.cloud.retail.v2.Product]. This value must be a UTF-8
+   * encoded string with a length limit of 1,000 characters. Otherwise, an
+   * INVALID_ARGUMENT error is returned.
+   * This tag can be used for filtering recommendation results by passing the
+   * tag as part of the
+   * [PredictRequest.filter][google.cloud.retail.v2.PredictRequest.filter].
+   * Google Merchant Center property
+   * [custom_label_0–4](https://support.google.com/merchants/answer/6324473).
+   * </pre>
+   *
+   * <code>repeated string tags = 13;</code>
+   *
+   * @param index The index of the element to return.
+   * @return The tags at the given index.
+   */
+  public java.lang.String getTags(int index) {
+    return tags_.get(index);
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Custom tags associated with the product.
+   * At most 250 values are allowed per
+   * [Product][google.cloud.retail.v2.Product]. This value must be a UTF-8
+   * encoded string with a length limit of 1,000 characters. Otherwise, an
+   * INVALID_ARGUMENT error is returned.
+   * This tag can be used for filtering recommendation results by passing the
+   * tag as part of the
+   * [PredictRequest.filter][google.cloud.retail.v2.PredictRequest.filter].
+   * Google Merchant Center property
+   * [custom_label_0–4](https://support.google.com/merchants/answer/6324473).
+   * </pre>
+   *
+   * <code>repeated string tags = 13;</code>
+   *
+   * @param index The index of the value to return.
+   * @return The bytes of the tags at the given index.
+   */
+  public com.google.protobuf.ByteString getTagsBytes(int index) {
+    return tags_.getByteString(index);
+  }
+
+  public static final int PRICE_INFO_FIELD_NUMBER = 14;
+  private com.google.cloud.retail.v2.PriceInfo priceInfo_;
+  /**
+   *
+   *
+   * <pre>
+   * Product price and cost information.
+   * Google Merchant Center property
+   * [price](https://support.google.com/merchants/answer/6324371).
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.PriceInfo price_info = 14;</code>
+   *
+   * @return Whether the priceInfo field is set.
+   */
+  @java.lang.Override
+  public boolean hasPriceInfo() {
+    return priceInfo_ != null;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Product price and cost information.
+   * Google Merchant Center property
+   * [price](https://support.google.com/merchants/answer/6324371).
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.PriceInfo price_info = 14;</code>
+   *
+   * @return The priceInfo.
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.PriceInfo getPriceInfo() {
+    return priceInfo_ == null
+        ? com.google.cloud.retail.v2.PriceInfo.getDefaultInstance()
+        : priceInfo_;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Product price and cost information.
+   * Google Merchant Center property
+   * [price](https://support.google.com/merchants/answer/6324371).
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.PriceInfo price_info = 14;</code>
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.PriceInfoOrBuilder getPriceInfoOrBuilder() {
+    return getPriceInfo();
+  }
+
+  public static final int AVAILABLE_TIME_FIELD_NUMBER = 18;
+  private com.google.protobuf.Timestamp availableTime_;
+  /**
+   *
+   *
+   * <pre>
+   * The timestamp when this [Product][google.cloud.retail.v2.Product] becomes
+   * available recommendation and search.
+   * </pre>
+   *
+   * <code>.google.protobuf.Timestamp available_time = 18;</code>
+   *
+   * @return Whether the availableTime field is set.
+   */
+  @java.lang.Override
+  public boolean hasAvailableTime() {
+    return availableTime_ != null;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * The timestamp when this [Product][google.cloud.retail.v2.Product] becomes
+   * available recommendation and search.
+   * </pre>
+   *
+   * <code>.google.protobuf.Timestamp available_time = 18;</code>
+   *
+   * @return The availableTime.
+   */
+  @java.lang.Override
+  public com.google.protobuf.Timestamp getAvailableTime() {
+    return availableTime_ == null
+        ? com.google.protobuf.Timestamp.getDefaultInstance()
+        : availableTime_;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * The timestamp when this [Product][google.cloud.retail.v2.Product] becomes
+   * available recommendation and search.
+   * </pre>
+   *
+   * <code>.google.protobuf.Timestamp available_time = 18;</code>
+   */
+  @java.lang.Override
+  public com.google.protobuf.TimestampOrBuilder getAvailableTimeOrBuilder() {
+    return getAvailableTime();
+  }
+
+  public static final int AVAILABILITY_FIELD_NUMBER = 19;
+  private int availability_;
+  /**
+   *
+   *
+   * <pre>
+   * The online availability of the [Product][google.cloud.retail.v2.Product].
+   * Default to
+   * [Availability.IN_STOCK][google.cloud.retail.v2.Product.Availability.IN_STOCK].
+   * Google Merchant Center Property
+   * [availability](https://support.google.com/merchants/answer/6324448).
+   * Schema.org Property [Offer.availability](https://schema.org/availability).
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.Product.Availability availability = 19;</code>
+   *
+   * @return The enum numeric value on the wire for availability.
+   */
+  @java.lang.Override
+  public int getAvailabilityValue() {
+    return availability_;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * The online availability of the [Product][google.cloud.retail.v2.Product].
+   * Default to
+   * [Availability.IN_STOCK][google.cloud.retail.v2.Product.Availability.IN_STOCK].
+   * Google Merchant Center Property
+   * [availability](https://support.google.com/merchants/answer/6324448).
+   * Schema.org Property [Offer.availability](https://schema.org/availability).
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.Product.Availability availability = 19;</code>
+   *
+   * @return The availability.
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.Product.Availability getAvailability() {
+    @SuppressWarnings("deprecation")
+    com.google.cloud.retail.v2.Product.Availability result =
+        com.google.cloud.retail.v2.Product.Availability.valueOf(availability_);
+    return result == null ? com.google.cloud.retail.v2.Product.Availability.UNRECOGNIZED : result;
+  }
+
+  public static final int AVAILABLE_QUANTITY_FIELD_NUMBER = 20;
+  private com.google.protobuf.Int32Value availableQuantity_;
+  /**
+   *
+   *
+   * <pre>
+   * The available quantity of the item.
+   * </pre>
+   *
+   * <code>.google.protobuf.Int32Value available_quantity = 20;</code>
+   *
+   * @return Whether the availableQuantity field is set.
+   */
+  @java.lang.Override
+  public boolean hasAvailableQuantity() {
+    return availableQuantity_ != null;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * The available quantity of the item.
+   * </pre>
+   *
+   * <code>.google.protobuf.Int32Value available_quantity = 20;</code>
+   *
+   * @return The availableQuantity.
+   */
+  @java.lang.Override
+  public com.google.protobuf.Int32Value getAvailableQuantity() {
+    return availableQuantity_ == null
+        ? com.google.protobuf.Int32Value.getDefaultInstance()
+        : availableQuantity_;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * The available quantity of the item.
+   * </pre>
+   *
+   * <code>.google.protobuf.Int32Value available_quantity = 20;</code>
+   */
+  @java.lang.Override
+  public com.google.protobuf.Int32ValueOrBuilder getAvailableQuantityOrBuilder() {
+    return getAvailableQuantity();
+  }
+
+  public static final int URI_FIELD_NUMBER = 22;
+  private volatile java.lang.Object uri_;
+  /**
+   *
+   *
+   * <pre>
+   * Canonical URL directly linking to the product detail page.
+   * This field must be a UTF-8 encoded string with a length limit of 5,000
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * Google Merchant Center property
+   * [link](https://support.google.com/merchants/answer/6324416). Schema.org
+   * property [Offer.url](https://schema.org/url).
+   * </pre>
+   *
+   * <code>string uri = 22;</code>
+   *
+   * @return The uri.
+   */
+  @java.lang.Override
+  public java.lang.String getUri() {
+    java.lang.Object ref = uri_;
+    if (ref instanceof java.lang.String) {
+      return (java.lang.String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+      java.lang.String s = bs.toStringUtf8();
+      uri_ = s;
+      return s;
+    }
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Canonical URL directly linking to the product detail page.
+   * This field must be a UTF-8 encoded string with a length limit of 5,000
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * Google Merchant Center property
+   * [link](https://support.google.com/merchants/answer/6324416). Schema.org
+   * property [Offer.url](https://schema.org/url).
+   * </pre>
+   *
+   * <code>string uri = 22;</code>
+   *
+   * @return The bytes for uri.
+   */
+  @java.lang.Override
+  public com.google.protobuf.ByteString getUriBytes() {
+    java.lang.Object ref = uri_;
+    if (ref instanceof java.lang.String) {
+      com.google.protobuf.ByteString b =
+          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+      uri_ = b;
+      return b;
+    } else {
+      return (com.google.protobuf.ByteString) ref;
+    }
+  }
+
+  public static final int IMAGES_FIELD_NUMBER = 23;
+  private java.util.List<com.google.cloud.retail.v2.Image> images_;
+  /**
+   *
+   *
+   * <pre>
+   * Product images for the product.
+   * A maximum of 300 images are allowed.
+   * Google Merchant Center property
+   * [image_link](https://support.google.com/merchants/answer/6324350).
+   * Schema.org property [Product.image](https://schema.org/image).
+   * </pre>
+   *
+   * <code>repeated .google.cloud.retail.v2.Image images = 23;</code>
+   */
+  @java.lang.Override
+  public java.util.List<com.google.cloud.retail.v2.Image> getImagesList() {
+    return images_;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Product images for the product.
+   * A maximum of 300 images are allowed.
+   * Google Merchant Center property
+   * [image_link](https://support.google.com/merchants/answer/6324350).
+   * Schema.org property [Product.image](https://schema.org/image).
+   * </pre>
+   *
+   * <code>repeated .google.cloud.retail.v2.Image images = 23;</code>
+   */
+  @java.lang.Override
+  public java.util.List<? extends com.google.cloud.retail.v2.ImageOrBuilder>
+      getImagesOrBuilderList() {
+    return images_;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Product images for the product.
+   * A maximum of 300 images are allowed.
+   * Google Merchant Center property
+   * [image_link](https://support.google.com/merchants/answer/6324350).
+   * Schema.org property [Product.image](https://schema.org/image).
+   * </pre>
+   *
+   * <code>repeated .google.cloud.retail.v2.Image images = 23;</code>
+   */
+  @java.lang.Override
+  public int getImagesCount() {
+    return images_.size();
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Product images for the product.
+   * A maximum of 300 images are allowed.
+   * Google Merchant Center property
+   * [image_link](https://support.google.com/merchants/answer/6324350).
+   * Schema.org property [Product.image](https://schema.org/image).
+   * </pre>
+   *
+   * <code>repeated .google.cloud.retail.v2.Image images = 23;</code>
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.Image getImages(int index) {
+    return images_.get(index);
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Product images for the product.
+   * A maximum of 300 images are allowed.
+   * Google Merchant Center property
+   * [image_link](https://support.google.com/merchants/answer/6324350).
+   * Schema.org property [Product.image](https://schema.org/image).
+   * </pre>
+   *
+   * <code>repeated .google.cloud.retail.v2.Image images = 23;</code>
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.ImageOrBuilder getImagesOrBuilder(int index) {
+    return images_.get(index);
+  }
+
+  private byte memoizedIsInitialized = -1;
+
+  @java.lang.Override
+  public final boolean isInitialized() {
+    byte isInitialized = memoizedIsInitialized;
+    if (isInitialized == 1) return true;
+    if (isInitialized == 0) return false;
+
+    memoizedIsInitialized = 1;
+    return true;
+  }
+
+  @java.lang.Override
+  public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
+    if (!getNameBytes().isEmpty()) {
+      com.google.protobuf.GeneratedMessageV3.writeString(output, 1, name_);
+    }
+    if (!getIdBytes().isEmpty()) {
+      com.google.protobuf.GeneratedMessageV3.writeString(output, 2, id_);
+    }
+    if (type_ != com.google.cloud.retail.v2.Product.Type.TYPE_UNSPECIFIED.getNumber()) {
+      output.writeEnum(3, type_);
+    }
+    if (!getPrimaryProductIdBytes().isEmpty()) {
+      com.google.protobuf.GeneratedMessageV3.writeString(output, 4, primaryProductId_);
+    }
+    for (int i = 0; i < categories_.size(); i++) {
+      com.google.protobuf.GeneratedMessageV3.writeString(output, 7, categories_.getRaw(i));
+    }
+    if (!getTitleBytes().isEmpty()) {
+      com.google.protobuf.GeneratedMessageV3.writeString(output, 8, title_);
+    }
+    if (!getDescriptionBytes().isEmpty()) {
+      com.google.protobuf.GeneratedMessageV3.writeString(output, 10, description_);
+    }
+    com.google.protobuf.GeneratedMessageV3.serializeStringMapTo(
+        output, internalGetAttributes(), AttributesDefaultEntryHolder.defaultEntry, 12);
+    for (int i = 0; i < tags_.size(); i++) {
+      com.google.protobuf.GeneratedMessageV3.writeString(output, 13, tags_.getRaw(i));
+    }
+    if (priceInfo_ != null) {
+      output.writeMessage(14, getPriceInfo());
+    }
+    if (availableTime_ != null) {
+      output.writeMessage(18, getAvailableTime());
+    }
+    if (availability_
+        != com.google.cloud.retail.v2.Product.Availability.AVAILABILITY_UNSPECIFIED.getNumber()) {
+      output.writeEnum(19, availability_);
+    }
+    if (availableQuantity_ != null) {
+      output.writeMessage(20, getAvailableQuantity());
+    }
+    if (!getUriBytes().isEmpty()) {
+      com.google.protobuf.GeneratedMessageV3.writeString(output, 22, uri_);
+    }
+    for (int i = 0; i < images_.size(); i++) {
+      output.writeMessage(23, images_.get(i));
+    }
+    unknownFields.writeTo(output);
+  }
+
+  @java.lang.Override
+  public int getSerializedSize() {
+    int size = memoizedSize;
+    if (size != -1) return size;
+
+    size = 0;
+    if (!getNameBytes().isEmpty()) {
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+    if (!getCategoriesList().equals(other.getCategoriesList())) return false;
+    if (!getTitle().equals(other.getTitle())) return false;
+    if (!getDescription().equals(other.getDescription())) return false;
+    if (!internalGetAttributes().equals(other.internalGetAttributes())) return false;
+    if (!getTagsList().equals(other.getTagsList())) return false;
+    if (hasPriceInfo() != other.hasPriceInfo()) return false;
+    if (hasPriceInfo()) {
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+    }
+    if (hasAvailableTime() != other.hasAvailableTime()) return false;
+    if (hasAvailableTime()) {
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+    }
+    if (availability_ != other.availability_) return false;
+    if (hasAvailableQuantity() != other.hasAvailableQuantity()) return false;
+    if (hasAvailableQuantity()) {
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+    }
+    if (!getUri().equals(other.getUri())) return false;
+    if (!getImagesList().equals(other.getImagesList())) return false;
+    if (!unknownFields.equals(other.unknownFields)) return false;
+    return true;
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+    hash = (37 * hash) + NAME_FIELD_NUMBER;
+    hash = (53 * hash) + getName().hashCode();
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+    hash = (53 * hash) + getUri().hashCode();
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+    memoizedHashCode = hash;
+    return hash;
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+
+  public static com.google.cloud.retail.v2.Product parseFrom(java.nio.ByteBuffer data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.Product parseFrom(
+      java.nio.ByteBuffer data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.Product parseFrom(com.google.protobuf.ByteString data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.Product parseFrom(
+      com.google.protobuf.ByteString data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.Product parseFrom(byte[] data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.Product parseFrom(
+      byte[] data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.Product parseFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.Product parseFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.Product parseDelimitedFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.Product parseDelimitedFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.Product parseFrom(
+      com.google.protobuf.CodedInputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.Product parseFrom(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  @java.lang.Override
+  public Builder newBuilderForType() {
+    return newBuilder();
+  }
+
+  public static Builder newBuilder() {
+    return DEFAULT_INSTANCE.toBuilder();
+  }
+
+  public static Builder newBuilder(com.google.cloud.retail.v2.Product prototype) {
+    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+  }
+
+  @java.lang.Override
+  public Builder toBuilder() {
+    return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
+  }
+
+  @java.lang.Override
+  protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+    Builder builder = new Builder(parent);
+    return builder;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Product captures all metadata information of items to be recommended or
+   * searched.
+   * </pre>
+   *
+   * Protobuf type {@code google.cloud.retail.v2.Product}
+   */
+  public static final class Builder extends com.google.protobuf.GeneratedMessageV3.Builder<Builder>
+      implements
+      // @@protoc_insertion_point(builder_implements:google.cloud.retail.v2.Product)
+      com.google.cloud.retail.v2.ProductOrBuilder {
+    public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+      return com.google.cloud.retail.v2.ProductProto
+          .internal_static_google_cloud_retail_v2_Product_descriptor;
+    }
+
+    @SuppressWarnings({"rawtypes"})
+    protected com.google.protobuf.MapField internalGetMapField(int number) {
+      switch (number) {
+        case 12:
+          return internalGetAttributes();
+        default:
+          throw new RuntimeException("Invalid map field number: " + number);
+      }
+    }
+
+    @SuppressWarnings({"rawtypes"})
+    protected com.google.protobuf.MapField internalGetMutableMapField(int number) {
+      switch (number) {
+        case 12:
+          return internalGetMutableAttributes();
+        default:
+          throw new RuntimeException("Invalid map field number: " + number);
+      }
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return com.google.cloud.retail.v2.ProductProto
+          .internal_static_google_cloud_retail_v2_Product_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              com.google.cloud.retail.v2.Product.class,
+              com.google.cloud.retail.v2.Product.Builder.class);
+    }
+
+    // Construct using com.google.cloud.retail.v2.Product.newBuilder()
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
+
+    private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+      super(parent);
+      maybeForceBuilderInitialization();
+    }
+
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders) {
+        getImagesFieldBuilder();
+      }
+    }
+
+    @java.lang.Override
+    public Builder clear() {
+      super.clear();
+      name_ = "";
+
+      id_ = "";
+
+      type_ = 0;
+
+      primaryProductId_ = "";
+
+      categories_ = com.google.protobuf.LazyStringArrayList.EMPTY;
+      bitField0_ = (bitField0_ & ~0x00000001);
+      title_ = "";
+
+      description_ = "";
+
+      internalGetMutableAttributes().clear();
+      tags_ = com.google.protobuf.LazyStringArrayList.EMPTY;
+      bitField0_ = (bitField0_ & ~0x00000004);
+      if (priceInfoBuilder_ == null) {
+        priceInfo_ = null;
+      } else {
+        priceInfo_ = null;
+        priceInfoBuilder_ = null;
+      }
+      if (availableTimeBuilder_ == null) {
+        availableTime_ = null;
+      } else {
+        availableTime_ = null;
+        availableTimeBuilder_ = null;
+      }
+      availability_ = 0;
+
+      if (availableQuantityBuilder_ == null) {
+        availableQuantity_ = null;
+      } else {
+        availableQuantity_ = null;
+        availableQuantityBuilder_ = null;
+      }
+      uri_ = "";
+
+      if (imagesBuilder_ == null) {
+        images_ = java.util.Collections.emptyList();
+        bitField0_ = (bitField0_ & ~0x00000008);
+      } else {
+        imagesBuilder_.clear();
+      }
+      return this;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
+      return com.google.cloud.retail.v2.ProductProto
+          .internal_static_google_cloud_retail_v2_Product_descriptor;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.Product getDefaultInstanceForType() {
+      return com.google.cloud.retail.v2.Product.getDefaultInstance();
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.Product build() {
+      com.google.cloud.retail.v2.Product result = buildPartial();
+      if (!result.isInitialized()) {
+        throw newUninitializedMessageException(result);
+      }
+      return result;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.Product buildPartial() {
+      com.google.cloud.retail.v2.Product result = new com.google.cloud.retail.v2.Product(this);
+      int from_bitField0_ = bitField0_;
+      result.name_ = name_;
+      result.id_ = id_;
+      result.type_ = type_;
+      result.primaryProductId_ = primaryProductId_;
+      if (((bitField0_ & 0x00000001) != 0)) {
+        categories_ = categories_.getUnmodifiableView();
+        bitField0_ = (bitField0_ & ~0x00000001);
+      }
+      result.categories_ = categories_;
+      result.title_ = title_;
+      result.description_ = description_;
+      result.attributes_ = internalGetAttributes();
+      result.attributes_.makeImmutable();
+      if (((bitField0_ & 0x00000004) != 0)) {
+        tags_ = tags_.getUnmodifiableView();
+        bitField0_ = (bitField0_ & ~0x00000004);
+      }
+      result.tags_ = tags_;
+      if (priceInfoBuilder_ == null) {
+        result.priceInfo_ = priceInfo_;
+      } else {
+        result.priceInfo_ = priceInfoBuilder_.build();
+      }
+      if (availableTimeBuilder_ == null) {
+        result.availableTime_ = availableTime_;
+      } else {
+        result.availableTime_ = availableTimeBuilder_.build();
+      }
+      result.availability_ = availability_;
+      if (availableQuantityBuilder_ == null) {
+        result.availableQuantity_ = availableQuantity_;
+      } else {
+        result.availableQuantity_ = availableQuantityBuilder_.build();
+      }
+      result.uri_ = uri_;
+      if (imagesBuilder_ == null) {
+        if (((bitField0_ & 0x00000008) != 0)) {
+          images_ = java.util.Collections.unmodifiableList(images_);
+          bitField0_ = (bitField0_ & ~0x00000008);
+        }
+        result.images_ = images_;
+      } else {
+        result.images_ = imagesBuilder_.build();
+      }
+      onBuilt();
+      return result;
+    }
+
+    @java.lang.Override
+    public Builder clone() {
+      return super.clone();
+    }
+
+    @java.lang.Override
+    public Builder setField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.setField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
+      return super.clearField(field);
+    }
+
+    @java.lang.Override
+    public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+      return super.clearOneof(oneof);
+    }
+
+    @java.lang.Override
+    public Builder setRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, int index, java.lang.Object value) {
+      return super.setRepeatedField(field, index, value);
+    }
+
+    @java.lang.Override
+    public Builder addRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.addRepeatedField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(com.google.protobuf.Message other) {
+      if (other instanceof com.google.cloud.retail.v2.Product) {
+        return mergeFrom((com.google.cloud.retail.v2.Product) other);
+      } else {
+        super.mergeFrom(other);
+        return this;
+      }
+    }
+
+    public Builder mergeFrom(com.google.cloud.retail.v2.Product other) {
+      if (other == com.google.cloud.retail.v2.Product.getDefaultInstance()) return this;
+      if (!other.getName().isEmpty()) {
+        name_ = other.name_;
+        onChanged();
+      }
+      if (!other.getId().isEmpty()) {
+        id_ = other.id_;
+        onChanged();
+      }
+      if (other.type_ != 0) {
+        setTypeValue(other.getTypeValue());
+      }
+      if (!other.getPrimaryProductId().isEmpty()) {
+        primaryProductId_ = other.primaryProductId_;
+        onChanged();
+      }
+      if (!other.categories_.isEmpty()) {
+        if (categories_.isEmpty()) {
+          categories_ = other.categories_;
+          bitField0_ = (bitField0_ & ~0x00000001);
+        } else {
+          ensureCategoriesIsMutable();
+          categories_.addAll(other.categories_);
+        }
+        onChanged();
+      }
+      if (!other.getTitle().isEmpty()) {
+        title_ = other.title_;
+        onChanged();
+      }
+      if (!other.getDescription().isEmpty()) {
+        description_ = other.description_;
+        onChanged();
+      }
+      internalGetMutableAttributes().mergeFrom(other.internalGetAttributes());
+      if (!other.tags_.isEmpty()) {
+        if (tags_.isEmpty()) {
+          tags_ = other.tags_;
+          bitField0_ = (bitField0_ & ~0x00000004);
+        } else {
+          ensureTagsIsMutable();
+          tags_.addAll(other.tags_);
+        }
+        onChanged();
+      }
+      if (other.hasPriceInfo()) {
+        mergePriceInfo(other.getPriceInfo());
+      }
+      if (other.hasAvailableTime()) {
+        mergeAvailableTime(other.getAvailableTime());
+      }
+      if (other.availability_ != 0) {
+        setAvailabilityValue(other.getAvailabilityValue());
+      }
+      if (other.hasAvailableQuantity()) {
+        mergeAvailableQuantity(other.getAvailableQuantity());
+      }
+      if (!other.getUri().isEmpty()) {
+        uri_ = other.uri_;
+        onChanged();
+      }
+      if (imagesBuilder_ == null) {
+        if (!other.images_.isEmpty()) {
+          if (images_.isEmpty()) {
+            images_ = other.images_;
+            bitField0_ = (bitField0_ & ~0x00000008);
+          } else {
+            ensureImagesIsMutable();
+            images_.addAll(other.images_);
+          }
+          onChanged();
+        }
+      } else {
+        if (!other.images_.isEmpty()) {
+          if (imagesBuilder_.isEmpty()) {
+            imagesBuilder_.dispose();
+            imagesBuilder_ = null;
+            images_ = other.images_;
+            bitField0_ = (bitField0_ & ~0x00000008);
+            imagesBuilder_ =
+                com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders
+                    ? getImagesFieldBuilder()
+                    : null;
+          } else {
+            imagesBuilder_.addAllMessages(other.images_);
+          }
+        }
+      }
+      this.mergeUnknownFields(other.unknownFields);
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final boolean isInitialized() {
+      return true;
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      com.google.cloud.retail.v2.Product parsedMessage = null;
+      try {
+        parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        parsedMessage = (com.google.cloud.retail.v2.Product) e.getUnfinishedMessage();
+        throw e.unwrapIOException();
+      } finally {
+        if (parsedMessage != null) {
+          mergeFrom(parsedMessage);
+        }
+      }
+      return this;
+    }
+
+    private int bitField0_;
+
+    private java.lang.Object name_ = "";
+    /**
+     *
+     *
+     * <pre>
+     * Immutable. Full resource name of the product, such as
+     * "projects/&#42;&#47;locations/global/catalogs/default_catalog/branches/default_branch/products/product_id".
+     * The branch ID must be "default_branch".
+     * </pre>
+     *
+     * <code>string name = 1 [(.google.api.field_behavior) = IMMUTABLE];</code>
+     *
+     * @return The name.
+     */
+    public java.lang.String getName() {
+      java.lang.Object ref = name_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        name_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Immutable. Full resource name of the product, such as
+     * "projects/&#42;&#47;locations/global/catalogs/default_catalog/branches/default_branch/products/product_id".
+     * The branch ID must be "default_branch".
+     * </pre>
+     *
+     * <code>string name = 1 [(.google.api.field_behavior) = IMMUTABLE];</code>
+     *
+     * @return The bytes for name.
+     */
+    public com.google.protobuf.ByteString getNameBytes() {
+      java.lang.Object ref = name_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b =
+            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+        name_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Immutable. Full resource name of the product, such as
+     * "projects/&#42;&#47;locations/global/catalogs/default_catalog/branches/default_branch/products/product_id".
+     * The branch ID must be "default_branch".
+     * </pre>
+     *
+     * <code>string name = 1 [(.google.api.field_behavior) = IMMUTABLE];</code>
+     *
+     * @param value The name to set.
+     * @return This builder for chaining.
+     */
+    public Builder setName(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+
+      name_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Immutable. Full resource name of the product, such as
+     * "projects/&#42;&#47;locations/global/catalogs/default_catalog/branches/default_branch/products/product_id".
+     * The branch ID must be "default_branch".
+     * </pre>
+     *
+     * <code>string name = 1 [(.google.api.field_behavior) = IMMUTABLE];</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearName() {
+
+      name_ = getDefaultInstance().getName();
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Immutable. Full resource name of the product, such as
+     * "projects/&#42;&#47;locations/global/catalogs/default_catalog/branches/default_branch/products/product_id".
+     * The branch ID must be "default_branch".
+     * </pre>
+     *
+     * <code>string name = 1 [(.google.api.field_behavior) = IMMUTABLE];</code>
+     *
+     * @param value The bytes for name to set.
+     * @return This builder for chaining.
+     */
+    public Builder setNameBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+
+      name_ = value;
+      onChanged();
+      return this;
+    }
+
+    private java.lang.Object id_ = "";
+    /**
+     *
+     *
+     * <pre>
+     * Immutable. [Product][google.cloud.retail.v2.Product] identifier, which is
+     * the final component of [name][google.cloud.retail.v2.Product.name]. For
+     * example, this field is "id_1", if
+     * [name][google.cloud.retail.v2.Product.name] is
+     * "projects/&#42;&#47;locations/global/catalogs/default_catalog/branches/default_branch/products/id_1".
+     * This field must be a UTF-8 encoded string with a length limit of 128
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * Google Merchant Center property
+     * [id](https://support.google.com/merchants/answer/6324405). Schema.org
+     * Property [Product.sku](https://schema.org/sku).
+     * </pre>
+     *
+     * <code>string id = 2 [(.google.api.field_behavior) = IMMUTABLE];</code>
+     *
+     * @return The id.
+     */
+    public java.lang.String getId() {
+      java.lang.Object ref = id_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        id_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Immutable. [Product][google.cloud.retail.v2.Product] identifier, which is
+     * the final component of [name][google.cloud.retail.v2.Product.name]. For
+     * example, this field is "id_1", if
+     * [name][google.cloud.retail.v2.Product.name] is
+     * "projects/&#42;&#47;locations/global/catalogs/default_catalog/branches/default_branch/products/id_1".
+     * This field must be a UTF-8 encoded string with a length limit of 128
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * Google Merchant Center property
+     * [id](https://support.google.com/merchants/answer/6324405). Schema.org
+     * Property [Product.sku](https://schema.org/sku).
+     * </pre>
+     *
+     * <code>string id = 2 [(.google.api.field_behavior) = IMMUTABLE];</code>
+     *
+     * @return The bytes for id.
+     */
+    public com.google.protobuf.ByteString getIdBytes() {
+      java.lang.Object ref = id_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b =
+            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+        id_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Immutable. [Product][google.cloud.retail.v2.Product] identifier, which is
+     * the final component of [name][google.cloud.retail.v2.Product.name]. For
+     * example, this field is "id_1", if
+     * [name][google.cloud.retail.v2.Product.name] is
+     * "projects/&#42;&#47;locations/global/catalogs/default_catalog/branches/default_branch/products/id_1".
+     * This field must be a UTF-8 encoded string with a length limit of 128
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * Google Merchant Center property
+     * [id](https://support.google.com/merchants/answer/6324405). Schema.org
+     * Property [Product.sku](https://schema.org/sku).
+     * </pre>
+     *
+     * <code>string id = 2 [(.google.api.field_behavior) = IMMUTABLE];</code>
+     *
+     * @param value The id to set.
+     * @return This builder for chaining.
+     */
+    public Builder setId(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+
+      id_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Immutable. [Product][google.cloud.retail.v2.Product] identifier, which is
+     * the final component of [name][google.cloud.retail.v2.Product.name]. For
+     * example, this field is "id_1", if
+     * [name][google.cloud.retail.v2.Product.name] is
+     * "projects/&#42;&#47;locations/global/catalogs/default_catalog/branches/default_branch/products/id_1".
+     * This field must be a UTF-8 encoded string with a length limit of 128
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * Google Merchant Center property
+     * [id](https://support.google.com/merchants/answer/6324405). Schema.org
+     * Property [Product.sku](https://schema.org/sku).
+     * </pre>
+     *
+     * <code>string id = 2 [(.google.api.field_behavior) = IMMUTABLE];</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearId() {
+
+      id_ = getDefaultInstance().getId();
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Immutable. [Product][google.cloud.retail.v2.Product] identifier, which is
+     * the final component of [name][google.cloud.retail.v2.Product.name]. For
+     * example, this field is "id_1", if
+     * [name][google.cloud.retail.v2.Product.name] is
+     * "projects/&#42;&#47;locations/global/catalogs/default_catalog/branches/default_branch/products/id_1".
+     * This field must be a UTF-8 encoded string with a length limit of 128
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * Google Merchant Center property
+     * [id](https://support.google.com/merchants/answer/6324405). Schema.org
+     * Property [Product.sku](https://schema.org/sku).
+     * </pre>
+     *
+     * <code>string id = 2 [(.google.api.field_behavior) = IMMUTABLE];</code>
+     *
+     * @param value The bytes for id to set.
+     * @return This builder for chaining.
+     */
+    public Builder setIdBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+
+      id_ = value;
+      onChanged();
+      return this;
+    }
+
+    private int type_ = 0;
+    /**
+     *
+     *
+     * <pre>
+     * Immutable. The type of the product. This field is output-only.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.Product.Type type = 3 [(.google.api.field_behavior) = IMMUTABLE];
+     * </code>
+     *
+     * @return The enum numeric value on the wire for type.
+     */
+    @java.lang.Override
+    public int getTypeValue() {
+      return type_;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Immutable. The type of the product. This field is output-only.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.Product.Type type = 3 [(.google.api.field_behavior) = IMMUTABLE];
+     * </code>
+     *
+     * @param value The enum numeric value on the wire for type to set.
+     * @return This builder for chaining.
+     */
+    public Builder setTypeValue(int value) {
+
+      type_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Immutable. The type of the product. This field is output-only.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.Product.Type type = 3 [(.google.api.field_behavior) = IMMUTABLE];
+     * </code>
+     *
+     * @return The type.
+     */
+    @java.lang.Override
+    public com.google.cloud.retail.v2.Product.Type getType() {
+      @SuppressWarnings("deprecation")
+      com.google.cloud.retail.v2.Product.Type result =
+          com.google.cloud.retail.v2.Product.Type.valueOf(type_);
+      return result == null ? com.google.cloud.retail.v2.Product.Type.UNRECOGNIZED : result;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Immutable. The type of the product. This field is output-only.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.Product.Type type = 3 [(.google.api.field_behavior) = IMMUTABLE];
+     * </code>
+     *
+     * @param value The type to set.
+     * @return This builder for chaining.
+     */
+    public Builder setType(com.google.cloud.retail.v2.Product.Type value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+
+      type_ = value.getNumber();
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Immutable. The type of the product. This field is output-only.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.Product.Type type = 3 [(.google.api.field_behavior) = IMMUTABLE];
+     * </code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearType() {
+
+      type_ = 0;
+      onChanged();
+      return this;
+    }
+
+    private java.lang.Object primaryProductId_ = "";
+    /**
+     *
+     *
+     * <pre>
+     * Variant group identifier. Must be an
+     * [id][google.cloud.retail.v2.Product.id], with the same parent branch with
+     * this product. Otherwise, an error is thrown.
+     * For [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
+     * [Product][google.cloud.retail.v2.Product]s, this field can only be empty or
+     * set to the same value as [id][google.cloud.retail.v2.Product.id].
+     * For VARIANT [Product][google.cloud.retail.v2.Product]s, this field cannot
+     * be empty. A maximum of 2,000 products are allowed to share the same
+     * [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
+     * [Product][google.cloud.retail.v2.Product]. Otherwise, an INVALID_ARGUMENT
+     * error is returned.
+     * Google Merchant Center Property
+     * [item_group_id](https://support.google.com/merchants/answer/6324507).
+     * Schema.org Property
+     * [Product.inProductGroupWithID](https://schema.org/inProductGroupWithID).
+     * This field must be enabled before it can be used. [Learn
+     * more](/recommendations-ai/docs/catalog#item-group-id).
+     * </pre>
+     *
+     * <code>string primary_product_id = 4;</code>
+     *
+     * @return The primaryProductId.
+     */
+    public java.lang.String getPrimaryProductId() {
+      java.lang.Object ref = primaryProductId_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        primaryProductId_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Variant group identifier. Must be an
+     * [id][google.cloud.retail.v2.Product.id], with the same parent branch with
+     * this product. Otherwise, an error is thrown.
+     * For [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
+     * [Product][google.cloud.retail.v2.Product]s, this field can only be empty or
+     * set to the same value as [id][google.cloud.retail.v2.Product.id].
+     * For VARIANT [Product][google.cloud.retail.v2.Product]s, this field cannot
+     * be empty. A maximum of 2,000 products are allowed to share the same
+     * [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
+     * [Product][google.cloud.retail.v2.Product]. Otherwise, an INVALID_ARGUMENT
+     * error is returned.
+     * Google Merchant Center Property
+     * [item_group_id](https://support.google.com/merchants/answer/6324507).
+     * Schema.org Property
+     * [Product.inProductGroupWithID](https://schema.org/inProductGroupWithID).
+     * This field must be enabled before it can be used. [Learn
+     * more](/recommendations-ai/docs/catalog#item-group-id).
+     * </pre>
+     *
+     * <code>string primary_product_id = 4;</code>
+     *
+     * @return The bytes for primaryProductId.
+     */
+    public com.google.protobuf.ByteString getPrimaryProductIdBytes() {
+      java.lang.Object ref = primaryProductId_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b =
+            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+        primaryProductId_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Variant group identifier. Must be an
+     * [id][google.cloud.retail.v2.Product.id], with the same parent branch with
+     * this product. Otherwise, an error is thrown.
+     * For [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
+     * [Product][google.cloud.retail.v2.Product]s, this field can only be empty or
+     * set to the same value as [id][google.cloud.retail.v2.Product.id].
+     * For VARIANT [Product][google.cloud.retail.v2.Product]s, this field cannot
+     * be empty. A maximum of 2,000 products are allowed to share the same
+     * [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
+     * [Product][google.cloud.retail.v2.Product]. Otherwise, an INVALID_ARGUMENT
+     * error is returned.
+     * Google Merchant Center Property
+     * [item_group_id](https://support.google.com/merchants/answer/6324507).
+     * Schema.org Property
+     * [Product.inProductGroupWithID](https://schema.org/inProductGroupWithID).
+     * This field must be enabled before it can be used. [Learn
+     * more](/recommendations-ai/docs/catalog#item-group-id).
+     * </pre>
+     *
+     * <code>string primary_product_id = 4;</code>
+     *
+     * @param value The primaryProductId to set.
+     * @return This builder for chaining.
+     */
+    public Builder setPrimaryProductId(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+
+      primaryProductId_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Variant group identifier. Must be an
+     * [id][google.cloud.retail.v2.Product.id], with the same parent branch with
+     * this product. Otherwise, an error is thrown.
+     * For [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
+     * [Product][google.cloud.retail.v2.Product]s, this field can only be empty or
+     * set to the same value as [id][google.cloud.retail.v2.Product.id].
+     * For VARIANT [Product][google.cloud.retail.v2.Product]s, this field cannot
+     * be empty. A maximum of 2,000 products are allowed to share the same
+     * [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
+     * [Product][google.cloud.retail.v2.Product]. Otherwise, an INVALID_ARGUMENT
+     * error is returned.
+     * Google Merchant Center Property
+     * [item_group_id](https://support.google.com/merchants/answer/6324507).
+     * Schema.org Property
+     * [Product.inProductGroupWithID](https://schema.org/inProductGroupWithID).
+     * This field must be enabled before it can be used. [Learn
+     * more](/recommendations-ai/docs/catalog#item-group-id).
+     * </pre>
+     *
+     * <code>string primary_product_id = 4;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearPrimaryProductId() {
+
+      primaryProductId_ = getDefaultInstance().getPrimaryProductId();
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Variant group identifier. Must be an
+     * [id][google.cloud.retail.v2.Product.id], with the same parent branch with
+     * this product. Otherwise, an error is thrown.
+     * For [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
+     * [Product][google.cloud.retail.v2.Product]s, this field can only be empty or
+     * set to the same value as [id][google.cloud.retail.v2.Product.id].
+     * For VARIANT [Product][google.cloud.retail.v2.Product]s, this field cannot
+     * be empty. A maximum of 2,000 products are allowed to share the same
+     * [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
+     * [Product][google.cloud.retail.v2.Product]. Otherwise, an INVALID_ARGUMENT
+     * error is returned.
+     * Google Merchant Center Property
+     * [item_group_id](https://support.google.com/merchants/answer/6324507).
+     * Schema.org Property
+     * [Product.inProductGroupWithID](https://schema.org/inProductGroupWithID).
+     * This field must be enabled before it can be used. [Learn
+     * more](/recommendations-ai/docs/catalog#item-group-id).
+     * </pre>
+     *
+     * <code>string primary_product_id = 4;</code>
+     *
+     * @param value The bytes for primaryProductId to set.
+     * @return This builder for chaining.
+     */
+    public Builder setPrimaryProductIdBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+
+      primaryProductId_ = value;
+      onChanged();
+      return this;
+    }
+
+    private com.google.protobuf.LazyStringList categories_ =
+        com.google.protobuf.LazyStringArrayList.EMPTY;
+
+    private void ensureCategoriesIsMutable() {
+      if (!((bitField0_ & 0x00000001) != 0)) {
+        categories_ = new com.google.protobuf.LazyStringArrayList(categories_);
+        bitField0_ |= 0x00000001;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Product categories. This field is repeated for supporting one product
+     * belonging to several parallel categories. Strongly recommended using the
+     * full path for better search / recommendation quality.
+     * To represent full path of category, use '&gt;' sign to separate different
+     * hierarchies. If '&gt;' is part of the category name, please replace it with
+     * other character(s).
+     * For example, if a shoes product belongs to both
+     * ["Shoes &amp; Accessories" -&gt; "Shoes"] and
+     * ["Sports &amp; Fitness" -&gt; "Athletic Clothing" -&gt; "Shoes"], it could be
+     * represented as:
+     *      "categories": [
+     *        "Shoes &amp; Accessories &gt; Shoes",
+     *        "Sports &amp; Fitness &gt; Athletic Clothing &gt; Shoes"
+     *      ]
+     * Must be set for [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
+     * [Product][google.cloud.retail.v2.Product] otherwise an INVALID_ARGUMENT
+     * error is returned.
+     * At most 250 values are allowed per
+     * [Product][google.cloud.retail.v2.Product]. Empty values are not allowed.
+     * Each value must be a UTF-8 encoded string with a length limit of 5,000
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * Google Merchant Center property
+     * [google_product_category][mc_google_product_category]. Schema.org property
+     * [Product.category] (https://schema.org/category).
+     * [mc_google_product_category]:
+     * https://support.google.com/merchants/answer/6324436
+     * </pre>
+     *
+     * <code>repeated string categories = 7;</code>
+     *
+     * @return A list containing the categories.
+     */
+    public com.google.protobuf.ProtocolStringList getCategoriesList() {
+      return categories_.getUnmodifiableView();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Product categories. This field is repeated for supporting one product
+     * belonging to several parallel categories. Strongly recommended using the
+     * full path for better search / recommendation quality.
+     * To represent full path of category, use '&gt;' sign to separate different
+     * hierarchies. If '&gt;' is part of the category name, please replace it with
+     * other character(s).
+     * For example, if a shoes product belongs to both
+     * ["Shoes &amp; Accessories" -&gt; "Shoes"] and
+     * ["Sports &amp; Fitness" -&gt; "Athletic Clothing" -&gt; "Shoes"], it could be
+     * represented as:
+     *      "categories": [
+     *        "Shoes &amp; Accessories &gt; Shoes",
+     *        "Sports &amp; Fitness &gt; Athletic Clothing &gt; Shoes"
+     *      ]
+     * Must be set for [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
+     * [Product][google.cloud.retail.v2.Product] otherwise an INVALID_ARGUMENT
+     * error is returned.
+     * At most 250 values are allowed per
+     * [Product][google.cloud.retail.v2.Product]. Empty values are not allowed.
+     * Each value must be a UTF-8 encoded string with a length limit of 5,000
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * Google Merchant Center property
+     * [google_product_category][mc_google_product_category]. Schema.org property
+     * [Product.category] (https://schema.org/category).
+     * [mc_google_product_category]:
+     * https://support.google.com/merchants/answer/6324436
+     * </pre>
+     *
+     * <code>repeated string categories = 7;</code>
+     *
+     * @return The count of categories.
+     */
+    public int getCategoriesCount() {
+      return categories_.size();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Product categories. This field is repeated for supporting one product
+     * belonging to several parallel categories. Strongly recommended using the
+     * full path for better search / recommendation quality.
+     * To represent full path of category, use '&gt;' sign to separate different
+     * hierarchies. If '&gt;' is part of the category name, please replace it with
+     * other character(s).
+     * For example, if a shoes product belongs to both
+     * ["Shoes &amp; Accessories" -&gt; "Shoes"] and
+     * ["Sports &amp; Fitness" -&gt; "Athletic Clothing" -&gt; "Shoes"], it could be
+     * represented as:
+     *      "categories": [
+     *        "Shoes &amp; Accessories &gt; Shoes",
+     *        "Sports &amp; Fitness &gt; Athletic Clothing &gt; Shoes"
+     *      ]
+     * Must be set for [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
+     * [Product][google.cloud.retail.v2.Product] otherwise an INVALID_ARGUMENT
+     * error is returned.
+     * At most 250 values are allowed per
+     * [Product][google.cloud.retail.v2.Product]. Empty values are not allowed.
+     * Each value must be a UTF-8 encoded string with a length limit of 5,000
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * Google Merchant Center property
+     * [google_product_category][mc_google_product_category]. Schema.org property
+     * [Product.category] (https://schema.org/category).
+     * [mc_google_product_category]:
+     * https://support.google.com/merchants/answer/6324436
+     * </pre>
+     *
+     * <code>repeated string categories = 7;</code>
+     *
+     * @param index The index of the element to return.
+     * @return The categories at the given index.
+     */
+    public java.lang.String getCategories(int index) {
+      return categories_.get(index);
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Product categories. This field is repeated for supporting one product
+     * belonging to several parallel categories. Strongly recommended using the
+     * full path for better search / recommendation quality.
+     * To represent full path of category, use '&gt;' sign to separate different
+     * hierarchies. If '&gt;' is part of the category name, please replace it with
+     * other character(s).
+     * For example, if a shoes product belongs to both
+     * ["Shoes &amp; Accessories" -&gt; "Shoes"] and
+     * ["Sports &amp; Fitness" -&gt; "Athletic Clothing" -&gt; "Shoes"], it could be
+     * represented as:
+     *      "categories": [
+     *        "Shoes &amp; Accessories &gt; Shoes",
+     *        "Sports &amp; Fitness &gt; Athletic Clothing &gt; Shoes"
+     *      ]
+     * Must be set for [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
+     * [Product][google.cloud.retail.v2.Product] otherwise an INVALID_ARGUMENT
+     * error is returned.
+     * At most 250 values are allowed per
+     * [Product][google.cloud.retail.v2.Product]. Empty values are not allowed.
+     * Each value must be a UTF-8 encoded string with a length limit of 5,000
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * Google Merchant Center property
+     * [google_product_category][mc_google_product_category]. Schema.org property
+     * [Product.category] (https://schema.org/category).
+     * [mc_google_product_category]:
+     * https://support.google.com/merchants/answer/6324436
+     * </pre>
+     *
+     * <code>repeated string categories = 7;</code>
+     *
+     * @param index The index of the value to return.
+     * @return The bytes of the categories at the given index.
+     */
+    public com.google.protobuf.ByteString getCategoriesBytes(int index) {
+      return categories_.getByteString(index);
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Product categories. This field is repeated for supporting one product
+     * belonging to several parallel categories. Strongly recommended using the
+     * full path for better search / recommendation quality.
+     * To represent full path of category, use '&gt;' sign to separate different
+     * hierarchies. If '&gt;' is part of the category name, please replace it with
+     * other character(s).
+     * For example, if a shoes product belongs to both
+     * ["Shoes &amp; Accessories" -&gt; "Shoes"] and
+     * ["Sports &amp; Fitness" -&gt; "Athletic Clothing" -&gt; "Shoes"], it could be
+     * represented as:
+     *      "categories": [
+     *        "Shoes &amp; Accessories &gt; Shoes",
+     *        "Sports &amp; Fitness &gt; Athletic Clothing &gt; Shoes"
+     *      ]
+     * Must be set for [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
+     * [Product][google.cloud.retail.v2.Product] otherwise an INVALID_ARGUMENT
+     * error is returned.
+     * At most 250 values are allowed per
+     * [Product][google.cloud.retail.v2.Product]. Empty values are not allowed.
+     * Each value must be a UTF-8 encoded string with a length limit of 5,000
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * Google Merchant Center property
+     * [google_product_category][mc_google_product_category]. Schema.org property
+     * [Product.category] (https://schema.org/category).
+     * [mc_google_product_category]:
+     * https://support.google.com/merchants/answer/6324436
+     * </pre>
+     *
+     * <code>repeated string categories = 7;</code>
+     *
+     * @param index The index to set the value at.
+     * @param value The categories to set.
+     * @return This builder for chaining.
+     */
+    public Builder setCategories(int index, java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      ensureCategoriesIsMutable();
+      categories_.set(index, value);
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Product categories. This field is repeated for supporting one product
+     * belonging to several parallel categories. Strongly recommended using the
+     * full path for better search / recommendation quality.
+     * To represent full path of category, use '&gt;' sign to separate different
+     * hierarchies. If '&gt;' is part of the category name, please replace it with
+     * other character(s).
+     * For example, if a shoes product belongs to both
+     * ["Shoes &amp; Accessories" -&gt; "Shoes"] and
+     * ["Sports &amp; Fitness" -&gt; "Athletic Clothing" -&gt; "Shoes"], it could be
+     * represented as:
+     *      "categories": [
+     *        "Shoes &amp; Accessories &gt; Shoes",
+     *        "Sports &amp; Fitness &gt; Athletic Clothing &gt; Shoes"
+     *      ]
+     * Must be set for [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
+     * [Product][google.cloud.retail.v2.Product] otherwise an INVALID_ARGUMENT
+     * error is returned.
+     * At most 250 values are allowed per
+     * [Product][google.cloud.retail.v2.Product]. Empty values are not allowed.
+     * Each value must be a UTF-8 encoded string with a length limit of 5,000
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * Google Merchant Center property
+     * [google_product_category][mc_google_product_category]. Schema.org property
+     * [Product.category] (https://schema.org/category).
+     * [mc_google_product_category]:
+     * https://support.google.com/merchants/answer/6324436
+     * </pre>
+     *
+     * <code>repeated string categories = 7;</code>
+     *
+     * @param value The categories to add.
+     * @return This builder for chaining.
+     */
+    public Builder addCategories(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      ensureCategoriesIsMutable();
+      categories_.add(value);
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Product categories. This field is repeated for supporting one product
+     * belonging to several parallel categories. Strongly recommended using the
+     * full path for better search / recommendation quality.
+     * To represent full path of category, use '&gt;' sign to separate different
+     * hierarchies. If '&gt;' is part of the category name, please replace it with
+     * other character(s).
+     * For example, if a shoes product belongs to both
+     * ["Shoes &amp; Accessories" -&gt; "Shoes"] and
+     * ["Sports &amp; Fitness" -&gt; "Athletic Clothing" -&gt; "Shoes"], it could be
+     * represented as:
+     *      "categories": [
+     *        "Shoes &amp; Accessories &gt; Shoes",
+     *        "Sports &amp; Fitness &gt; Athletic Clothing &gt; Shoes"
+     *      ]
+     * Must be set for [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
+     * [Product][google.cloud.retail.v2.Product] otherwise an INVALID_ARGUMENT
+     * error is returned.
+     * At most 250 values are allowed per
+     * [Product][google.cloud.retail.v2.Product]. Empty values are not allowed.
+     * Each value must be a UTF-8 encoded string with a length limit of 5,000
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * Google Merchant Center property
+     * [google_product_category][mc_google_product_category]. Schema.org property
+     * [Product.category] (https://schema.org/category).
+     * [mc_google_product_category]:
+     * https://support.google.com/merchants/answer/6324436
+     * </pre>
+     *
+     * <code>repeated string categories = 7;</code>
+     *
+     * @param values The categories to add.
+     * @return This builder for chaining.
+     */
+    public Builder addAllCategories(java.lang.Iterable<java.lang.String> values) {
+      ensureCategoriesIsMutable();
+      com.google.protobuf.AbstractMessageLite.Builder.addAll(values, categories_);
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Product categories. This field is repeated for supporting one product
+     * belonging to several parallel categories. Strongly recommended using the
+     * full path for better search / recommendation quality.
+     * To represent full path of category, use '&gt;' sign to separate different
+     * hierarchies. If '&gt;' is part of the category name, please replace it with
+     * other character(s).
+     * For example, if a shoes product belongs to both
+     * ["Shoes &amp; Accessories" -&gt; "Shoes"] and
+     * ["Sports &amp; Fitness" -&gt; "Athletic Clothing" -&gt; "Shoes"], it could be
+     * represented as:
+     *      "categories": [
+     *        "Shoes &amp; Accessories &gt; Shoes",
+     *        "Sports &amp; Fitness &gt; Athletic Clothing &gt; Shoes"
+     *      ]
+     * Must be set for [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
+     * [Product][google.cloud.retail.v2.Product] otherwise an INVALID_ARGUMENT
+     * error is returned.
+     * At most 250 values are allowed per
+     * [Product][google.cloud.retail.v2.Product]. Empty values are not allowed.
+     * Each value must be a UTF-8 encoded string with a length limit of 5,000
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * Google Merchant Center property
+     * [google_product_category][mc_google_product_category]. Schema.org property
+     * [Product.category] (https://schema.org/category).
+     * [mc_google_product_category]:
+     * https://support.google.com/merchants/answer/6324436
+     * </pre>
+     *
+     * <code>repeated string categories = 7;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearCategories() {
+      categories_ = com.google.protobuf.LazyStringArrayList.EMPTY;
+      bitField0_ = (bitField0_ & ~0x00000001);
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Product categories. This field is repeated for supporting one product
+     * belonging to several parallel categories. Strongly recommended using the
+     * full path for better search / recommendation quality.
+     * To represent full path of category, use '&gt;' sign to separate different
+     * hierarchies. If '&gt;' is part of the category name, please replace it with
+     * other character(s).
+     * For example, if a shoes product belongs to both
+     * ["Shoes &amp; Accessories" -&gt; "Shoes"] and
+     * ["Sports &amp; Fitness" -&gt; "Athletic Clothing" -&gt; "Shoes"], it could be
+     * represented as:
+     *      "categories": [
+     *        "Shoes &amp; Accessories &gt; Shoes",
+     *        "Sports &amp; Fitness &gt; Athletic Clothing &gt; Shoes"
+     *      ]
+     * Must be set for [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
+     * [Product][google.cloud.retail.v2.Product] otherwise an INVALID_ARGUMENT
+     * error is returned.
+     * At most 250 values are allowed per
+     * [Product][google.cloud.retail.v2.Product]. Empty values are not allowed.
+     * Each value must be a UTF-8 encoded string with a length limit of 5,000
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * Google Merchant Center property
+     * [google_product_category][mc_google_product_category]. Schema.org property
+     * [Product.category] (https://schema.org/category).
+     * [mc_google_product_category]:
+     * https://support.google.com/merchants/answer/6324436
+     * </pre>
+     *
+     * <code>repeated string categories = 7;</code>
+     *
+     * @param value The bytes of the categories to add.
+     * @return This builder for chaining.
+     */
+    public Builder addCategoriesBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+      ensureCategoriesIsMutable();
+      categories_.add(value);
+      onChanged();
+      return this;
+    }
+
+    private java.lang.Object title_ = "";
+    /**
+     *
+     *
+     * <pre>
+     * Required. Product title.
+     * This field must be a UTF-8 encoded string with a length limit of 128
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * Google Merchant Center property
+     * [title](https://support.google.com/merchants/answer/6324415). Schema.org
+     * property [Product.name](https://schema.org/name).
+     * </pre>
+     *
+     * <code>string title = 8 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @return The title.
+     */
+    public java.lang.String getTitle() {
+      java.lang.Object ref = title_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        title_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. Product title.
+     * This field must be a UTF-8 encoded string with a length limit of 128
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * Google Merchant Center property
+     * [title](https://support.google.com/merchants/answer/6324415). Schema.org
+     * property [Product.name](https://schema.org/name).
+     * </pre>
+     *
+     * <code>string title = 8 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @return The bytes for title.
+     */
+    public com.google.protobuf.ByteString getTitleBytes() {
+      java.lang.Object ref = title_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b =
+            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+        title_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. Product title.
+     * This field must be a UTF-8 encoded string with a length limit of 128
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * Google Merchant Center property
+     * [title](https://support.google.com/merchants/answer/6324415). Schema.org
+     * property [Product.name](https://schema.org/name).
+     * </pre>
+     *
+     * <code>string title = 8 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @param value The title to set.
+     * @return This builder for chaining.
+     */
+    public Builder setTitle(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+
+      title_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. Product title.
+     * This field must be a UTF-8 encoded string with a length limit of 128
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * Google Merchant Center property
+     * [title](https://support.google.com/merchants/answer/6324415). Schema.org
+     * property [Product.name](https://schema.org/name).
+     * </pre>
+     *
+     * <code>string title = 8 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearTitle() {
+
+      title_ = getDefaultInstance().getTitle();
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. Product title.
+     * This field must be a UTF-8 encoded string with a length limit of 128
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * Google Merchant Center property
+     * [title](https://support.google.com/merchants/answer/6324415). Schema.org
+     * property [Product.name](https://schema.org/name).
+     * </pre>
+     *
+     * <code>string title = 8 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @param value The bytes for title to set.
+     * @return This builder for chaining.
+     */
+    public Builder setTitleBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+
+      title_ = value;
+      onChanged();
+      return this;
+    }
+
+    private java.lang.Object description_ = "";
+    /**
+     *
+     *
+     * <pre>
+     * Product description.
+     * This field must be a UTF-8 encoded string with a length limit of 5,000
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * Google Merchant Center property
+     * [description](https://support.google.com/merchants/answer/6324468).
+     * schema.org property [Product.description](https://schema.org/description).
+     * </pre>
+     *
+     * <code>string description = 10;</code>
+     *
+     * @return The description.
+     */
+    public java.lang.String getDescription() {
+      java.lang.Object ref = description_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        description_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Product description.
+     * This field must be a UTF-8 encoded string with a length limit of 5,000
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * Google Merchant Center property
+     * [description](https://support.google.com/merchants/answer/6324468).
+     * schema.org property [Product.description](https://schema.org/description).
+     * </pre>
+     *
+     * <code>string description = 10;</code>
+     *
+     * @return The bytes for description.
+     */
+    public com.google.protobuf.ByteString getDescriptionBytes() {
+      java.lang.Object ref = description_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b =
+            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+        description_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Product description.
+     * This field must be a UTF-8 encoded string with a length limit of 5,000
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * Google Merchant Center property
+     * [description](https://support.google.com/merchants/answer/6324468).
+     * schema.org property [Product.description](https://schema.org/description).
+     * </pre>
+     *
+     * <code>string description = 10;</code>
+     *
+     * @param value The description to set.
+     * @return This builder for chaining.
+     */
+    public Builder setDescription(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+
+      description_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Product description.
+     * This field must be a UTF-8 encoded string with a length limit of 5,000
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * Google Merchant Center property
+     * [description](https://support.google.com/merchants/answer/6324468).
+     * schema.org property [Product.description](https://schema.org/description).
+     * </pre>
+     *
+     * <code>string description = 10;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearDescription() {
+
+      description_ = getDefaultInstance().getDescription();
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Product description.
+     * This field must be a UTF-8 encoded string with a length limit of 5,000
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * Google Merchant Center property
+     * [description](https://support.google.com/merchants/answer/6324468).
+     * schema.org property [Product.description](https://schema.org/description).
+     * </pre>
+     *
+     * <code>string description = 10;</code>
+     *
+     * @param value The bytes for description to set.
+     * @return This builder for chaining.
+     */
+    public Builder setDescriptionBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+
+      description_ = value;
+      onChanged();
+      return this;
+    }
+
+    private com.google.protobuf.MapField<
+            java.lang.String, com.google.cloud.retail.v2.CustomAttribute>
+        attributes_;
+
+    private com.google.protobuf.MapField<
+            java.lang.String, com.google.cloud.retail.v2.CustomAttribute>
+        internalGetAttributes() {
+      if (attributes_ == null) {
+        return com.google.protobuf.MapField.emptyMapField(
+            AttributesDefaultEntryHolder.defaultEntry);
+      }
+      return attributes_;
+    }
+
+    private com.google.protobuf.MapField<
+            java.lang.String, com.google.cloud.retail.v2.CustomAttribute>
+        internalGetMutableAttributes() {
+      onChanged();
+      ;
+      if (attributes_ == null) {
+        attributes_ =
+            com.google.protobuf.MapField.newMapField(AttributesDefaultEntryHolder.defaultEntry);
+      }
+      if (!attributes_.isMutable()) {
+        attributes_ = attributes_.copy();
+      }
+      return attributes_;
+    }
+
+    public int getAttributesCount() {
+      return internalGetAttributes().getMap().size();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Highly encouraged. Extra product attributes to be included. For example,
+     * for products, this could include the store name, vendor, style, color, etc.
+     * These are very strong signals for recommendation model, thus we highly
+     * recommend providing the attributes here.
+     * Features that can take on one of a limited number of possible values. Two
+     * types of features can be set are:
+     * Textual features. some examples would be the brand/maker of a product, or
+     * country of a customer. Numerical features. Some examples would be the
+     * height/weight of a product, or age of a customer.
+     * For example: `{ "vendor": {"text": ["vendor123", "vendor456"]},
+     * "lengths_cm": {"numbers":[2.3, 15.4]}, "heights_cm": {"numbers":[8.1, 6.4]}
+     * }`.
+     * A maximum of 150 attributes are allowed. Otherwise, an INVALID_ARGUMENT
+     * error is returned.
+     * The key must be a UTF-8 encoded string with a length limit of 5,000
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>map&lt;string, .google.cloud.retail.v2.CustomAttribute&gt; attributes = 12;</code>
+     */
+    @java.lang.Override
+    public boolean containsAttributes(java.lang.String key) {
+      if (key == null) {
+        throw new java.lang.NullPointerException();
+      }
+      return internalGetAttributes().getMap().containsKey(key);
+    }
+    /** Use {@link #getAttributesMap()} instead. */
+    @java.lang.Override
+    @java.lang.Deprecated
+    public java.util.Map<java.lang.String, com.google.cloud.retail.v2.CustomAttribute>
+        getAttributes() {
+      return getAttributesMap();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Highly encouraged. Extra product attributes to be included. For example,
+     * for products, this could include the store name, vendor, style, color, etc.
+     * These are very strong signals for recommendation model, thus we highly
+     * recommend providing the attributes here.
+     * Features that can take on one of a limited number of possible values. Two
+     * types of features can be set are:
+     * Textual features. some examples would be the brand/maker of a product, or
+     * country of a customer. Numerical features. Some examples would be the
+     * height/weight of a product, or age of a customer.
+     * For example: `{ "vendor": {"text": ["vendor123", "vendor456"]},
+     * "lengths_cm": {"numbers":[2.3, 15.4]}, "heights_cm": {"numbers":[8.1, 6.4]}
+     * }`.
+     * A maximum of 150 attributes are allowed. Otherwise, an INVALID_ARGUMENT
+     * error is returned.
+     * The key must be a UTF-8 encoded string with a length limit of 5,000
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>map&lt;string, .google.cloud.retail.v2.CustomAttribute&gt; attributes = 12;</code>
+     */
+    @java.lang.Override
+    public java.util.Map<java.lang.String, com.google.cloud.retail.v2.CustomAttribute>
+        getAttributesMap() {
+      return internalGetAttributes().getMap();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Highly encouraged. Extra product attributes to be included. For example,
+     * for products, this could include the store name, vendor, style, color, etc.
+     * These are very strong signals for recommendation model, thus we highly
+     * recommend providing the attributes here.
+     * Features that can take on one of a limited number of possible values. Two
+     * types of features can be set are:
+     * Textual features. some examples would be the brand/maker of a product, or
+     * country of a customer. Numerical features. Some examples would be the
+     * height/weight of a product, or age of a customer.
+     * For example: `{ "vendor": {"text": ["vendor123", "vendor456"]},
+     * "lengths_cm": {"numbers":[2.3, 15.4]}, "heights_cm": {"numbers":[8.1, 6.4]}
+     * }`.
+     * A maximum of 150 attributes are allowed. Otherwise, an INVALID_ARGUMENT
+     * error is returned.
+     * The key must be a UTF-8 encoded string with a length limit of 5,000
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>map&lt;string, .google.cloud.retail.v2.CustomAttribute&gt; attributes = 12;</code>
+     */
+    @java.lang.Override
+    public com.google.cloud.retail.v2.CustomAttribute getAttributesOrDefault(
+        java.lang.String key, com.google.cloud.retail.v2.CustomAttribute defaultValue) {
+      if (key == null) {
+        throw new java.lang.NullPointerException();
+      }
+      java.util.Map<java.lang.String, com.google.cloud.retail.v2.CustomAttribute> map =
+          internalGetAttributes().getMap();
+      return map.containsKey(key) ? map.get(key) : defaultValue;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Highly encouraged. Extra product attributes to be included. For example,
+     * for products, this could include the store name, vendor, style, color, etc.
+     * These are very strong signals for recommendation model, thus we highly
+     * recommend providing the attributes here.
+     * Features that can take on one of a limited number of possible values. Two
+     * types of features can be set are:
+     * Textual features. some examples would be the brand/maker of a product, or
+     * country of a customer. Numerical features. Some examples would be the
+     * height/weight of a product, or age of a customer.
+     * For example: `{ "vendor": {"text": ["vendor123", "vendor456"]},
+     * "lengths_cm": {"numbers":[2.3, 15.4]}, "heights_cm": {"numbers":[8.1, 6.4]}
+     * }`.
+     * A maximum of 150 attributes are allowed. Otherwise, an INVALID_ARGUMENT
+     * error is returned.
+     * The key must be a UTF-8 encoded string with a length limit of 5,000
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>map&lt;string, .google.cloud.retail.v2.CustomAttribute&gt; attributes = 12;</code>
+     */
+    @java.lang.Override
+    public com.google.cloud.retail.v2.CustomAttribute getAttributesOrThrow(java.lang.String key) {
+      if (key == null) {
+        throw new java.lang.NullPointerException();
+      }
+      java.util.Map<java.lang.String, com.google.cloud.retail.v2.CustomAttribute> map =
+          internalGetAttributes().getMap();
+      if (!map.containsKey(key)) {
+        throw new java.lang.IllegalArgumentException();
+      }
+      return map.get(key);
+    }
+
+    public Builder clearAttributes() {
+      internalGetMutableAttributes().getMutableMap().clear();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Highly encouraged. Extra product attributes to be included. For example,
+     * for products, this could include the store name, vendor, style, color, etc.
+     * These are very strong signals for recommendation model, thus we highly
+     * recommend providing the attributes here.
+     * Features that can take on one of a limited number of possible values. Two
+     * types of features can be set are:
+     * Textual features. some examples would be the brand/maker of a product, or
+     * country of a customer. Numerical features. Some examples would be the
+     * height/weight of a product, or age of a customer.
+     * For example: `{ "vendor": {"text": ["vendor123", "vendor456"]},
+     * "lengths_cm": {"numbers":[2.3, 15.4]}, "heights_cm": {"numbers":[8.1, 6.4]}
+     * }`.
+     * A maximum of 150 attributes are allowed. Otherwise, an INVALID_ARGUMENT
+     * error is returned.
+     * The key must be a UTF-8 encoded string with a length limit of 5,000
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>map&lt;string, .google.cloud.retail.v2.CustomAttribute&gt; attributes = 12;</code>
+     */
+    public Builder removeAttributes(java.lang.String key) {
+      if (key == null) {
+        throw new java.lang.NullPointerException();
+      }
+      internalGetMutableAttributes().getMutableMap().remove(key);
+      return this;
+    }
+    /** Use alternate mutation accessors instead. */
+    @java.lang.Deprecated
+    public java.util.Map<java.lang.String, com.google.cloud.retail.v2.CustomAttribute>
+        getMutableAttributes() {
+      return internalGetMutableAttributes().getMutableMap();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Highly encouraged. Extra product attributes to be included. For example,
+     * for products, this could include the store name, vendor, style, color, etc.
+     * These are very strong signals for recommendation model, thus we highly
+     * recommend providing the attributes here.
+     * Features that can take on one of a limited number of possible values. Two
+     * types of features can be set are:
+     * Textual features. some examples would be the brand/maker of a product, or
+     * country of a customer. Numerical features. Some examples would be the
+     * height/weight of a product, or age of a customer.
+     * For example: `{ "vendor": {"text": ["vendor123", "vendor456"]},
+     * "lengths_cm": {"numbers":[2.3, 15.4]}, "heights_cm": {"numbers":[8.1, 6.4]}
+     * }`.
+     * A maximum of 150 attributes are allowed. Otherwise, an INVALID_ARGUMENT
+     * error is returned.
+     * The key must be a UTF-8 encoded string with a length limit of 5,000
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>map&lt;string, .google.cloud.retail.v2.CustomAttribute&gt; attributes = 12;</code>
+     */
+    public Builder putAttributes(
+        java.lang.String key, com.google.cloud.retail.v2.CustomAttribute value) {
+      if (key == null) {
+        throw new java.lang.NullPointerException();
+      }
+      if (value == null) {
+        throw new java.lang.NullPointerException();
+      }
+      internalGetMutableAttributes().getMutableMap().put(key, value);
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Highly encouraged. Extra product attributes to be included. For example,
+     * for products, this could include the store name, vendor, style, color, etc.
+     * These are very strong signals for recommendation model, thus we highly
+     * recommend providing the attributes here.
+     * Features that can take on one of a limited number of possible values. Two
+     * types of features can be set are:
+     * Textual features. some examples would be the brand/maker of a product, or
+     * country of a customer. Numerical features. Some examples would be the
+     * height/weight of a product, or age of a customer.
+     * For example: `{ "vendor": {"text": ["vendor123", "vendor456"]},
+     * "lengths_cm": {"numbers":[2.3, 15.4]}, "heights_cm": {"numbers":[8.1, 6.4]}
+     * }`.
+     * A maximum of 150 attributes are allowed. Otherwise, an INVALID_ARGUMENT
+     * error is returned.
+     * The key must be a UTF-8 encoded string with a length limit of 5,000
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>map&lt;string, .google.cloud.retail.v2.CustomAttribute&gt; attributes = 12;</code>
+     */
+    public Builder putAllAttributes(
+        java.util.Map<java.lang.String, com.google.cloud.retail.v2.CustomAttribute> values) {
+      internalGetMutableAttributes().getMutableMap().putAll(values);
+      return this;
+    }
+
+    private com.google.protobuf.LazyStringList tags_ =
+        com.google.protobuf.LazyStringArrayList.EMPTY;
+
+    private void ensureTagsIsMutable() {
+      if (!((bitField0_ & 0x00000004) != 0)) {
+        tags_ = new com.google.protobuf.LazyStringArrayList(tags_);
+        bitField0_ |= 0x00000004;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Custom tags associated with the product.
+     * At most 250 values are allowed per
+     * [Product][google.cloud.retail.v2.Product]. This value must be a UTF-8
+     * encoded string with a length limit of 1,000 characters. Otherwise, an
+     * INVALID_ARGUMENT error is returned.
+     * This tag can be used for filtering recommendation results by passing the
+     * tag as part of the
+     * [PredictRequest.filter][google.cloud.retail.v2.PredictRequest.filter].
+     * Google Merchant Center property
+     * [custom_label_0–4](https://support.google.com/merchants/answer/6324473).
+     * </pre>
+     *
+     * <code>repeated string tags = 13;</code>
+     *
+     * @return A list containing the tags.
+     */
+    public com.google.protobuf.ProtocolStringList getTagsList() {
+      return tags_.getUnmodifiableView();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Custom tags associated with the product.
+     * At most 250 values are allowed per
+     * [Product][google.cloud.retail.v2.Product]. This value must be a UTF-8
+     * encoded string with a length limit of 1,000 characters. Otherwise, an
+     * INVALID_ARGUMENT error is returned.
+     * This tag can be used for filtering recommendation results by passing the
+     * tag as part of the
+     * [PredictRequest.filter][google.cloud.retail.v2.PredictRequest.filter].
+     * Google Merchant Center property
+     * [custom_label_0–4](https://support.google.com/merchants/answer/6324473).
+     * </pre>
+     *
+     * <code>repeated string tags = 13;</code>
+     *
+     * @return The count of tags.
+     */
+    public int getTagsCount() {
+      return tags_.size();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Custom tags associated with the product.
+     * At most 250 values are allowed per
+     * [Product][google.cloud.retail.v2.Product]. This value must be a UTF-8
+     * encoded string with a length limit of 1,000 characters. Otherwise, an
+     * INVALID_ARGUMENT error is returned.
+     * This tag can be used for filtering recommendation results by passing the
+     * tag as part of the
+     * [PredictRequest.filter][google.cloud.retail.v2.PredictRequest.filter].
+     * Google Merchant Center property
+     * [custom_label_0–4](https://support.google.com/merchants/answer/6324473).
+     * </pre>
+     *
+     * <code>repeated string tags = 13;</code>
+     *
+     * @param index The index of the element to return.
+     * @return The tags at the given index.
+     */
+    public java.lang.String getTags(int index) {
+      return tags_.get(index);
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Custom tags associated with the product.
+     * At most 250 values are allowed per
+     * [Product][google.cloud.retail.v2.Product]. This value must be a UTF-8
+     * encoded string with a length limit of 1,000 characters. Otherwise, an
+     * INVALID_ARGUMENT error is returned.
+     * This tag can be used for filtering recommendation results by passing the
+     * tag as part of the
+     * [PredictRequest.filter][google.cloud.retail.v2.PredictRequest.filter].
+     * Google Merchant Center property
+     * [custom_label_0–4](https://support.google.com/merchants/answer/6324473).
+     * </pre>
+     *
+     * <code>repeated string tags = 13;</code>
+     *
+     * @param index The index of the value to return.
+     * @return The bytes of the tags at the given index.
+     */
+    public com.google.protobuf.ByteString getTagsBytes(int index) {
+      return tags_.getByteString(index);
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Custom tags associated with the product.
+     * At most 250 values are allowed per
+     * [Product][google.cloud.retail.v2.Product]. This value must be a UTF-8
+     * encoded string with a length limit of 1,000 characters. Otherwise, an
+     * INVALID_ARGUMENT error is returned.
+     * This tag can be used for filtering recommendation results by passing the
+     * tag as part of the
+     * [PredictRequest.filter][google.cloud.retail.v2.PredictRequest.filter].
+     * Google Merchant Center property
+     * [custom_label_0–4](https://support.google.com/merchants/answer/6324473).
+     * </pre>
+     *
+     * <code>repeated string tags = 13;</code>
+     *
+     * @param index The index to set the value at.
+     * @param value The tags to set.
+     * @return This builder for chaining.
+     */
+    public Builder setTags(int index, java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      ensureTagsIsMutable();
+      tags_.set(index, value);
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Custom tags associated with the product.
+     * At most 250 values are allowed per
+     * [Product][google.cloud.retail.v2.Product]. This value must be a UTF-8
+     * encoded string with a length limit of 1,000 characters. Otherwise, an
+     * INVALID_ARGUMENT error is returned.
+     * This tag can be used for filtering recommendation results by passing the
+     * tag as part of the
+     * [PredictRequest.filter][google.cloud.retail.v2.PredictRequest.filter].
+     * Google Merchant Center property
+     * [custom_label_0–4](https://support.google.com/merchants/answer/6324473).
+     * </pre>
+     *
+     * <code>repeated string tags = 13;</code>
+     *
+     * @param value The tags to add.
+     * @return This builder for chaining.
+     */
+    public Builder addTags(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      ensureTagsIsMutable();
+      tags_.add(value);
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Custom tags associated with the product.
+     * At most 250 values are allowed per
+     * [Product][google.cloud.retail.v2.Product]. This value must be a UTF-8
+     * encoded string with a length limit of 1,000 characters. Otherwise, an
+     * INVALID_ARGUMENT error is returned.
+     * This tag can be used for filtering recommendation results by passing the
+     * tag as part of the
+     * [PredictRequest.filter][google.cloud.retail.v2.PredictRequest.filter].
+     * Google Merchant Center property
+     * [custom_label_0–4](https://support.google.com/merchants/answer/6324473).
+     * </pre>
+     *
+     * <code>repeated string tags = 13;</code>
+     *
+     * @param values The tags to add.
+     * @return This builder for chaining.
+     */
+    public Builder addAllTags(java.lang.Iterable<java.lang.String> values) {
+      ensureTagsIsMutable();
+      com.google.protobuf.AbstractMessageLite.Builder.addAll(values, tags_);
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Custom tags associated with the product.
+     * At most 250 values are allowed per
+     * [Product][google.cloud.retail.v2.Product]. This value must be a UTF-8
+     * encoded string with a length limit of 1,000 characters. Otherwise, an
+     * INVALID_ARGUMENT error is returned.
+     * This tag can be used for filtering recommendation results by passing the
+     * tag as part of the
+     * [PredictRequest.filter][google.cloud.retail.v2.PredictRequest.filter].
+     * Google Merchant Center property
+     * [custom_label_0–4](https://support.google.com/merchants/answer/6324473).
+     * </pre>
+     *
+     * <code>repeated string tags = 13;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearTags() {
+      tags_ = com.google.protobuf.LazyStringArrayList.EMPTY;
+      bitField0_ = (bitField0_ & ~0x00000004);
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Custom tags associated with the product.
+     * At most 250 values are allowed per
+     * [Product][google.cloud.retail.v2.Product]. This value must be a UTF-8
+     * encoded string with a length limit of 1,000 characters. Otherwise, an
+     * INVALID_ARGUMENT error is returned.
+     * This tag can be used for filtering recommendation results by passing the
+     * tag as part of the
+     * [PredictRequest.filter][google.cloud.retail.v2.PredictRequest.filter].
+     * Google Merchant Center property
+     * [custom_label_0–4](https://support.google.com/merchants/answer/6324473).
+     * </pre>
+     *
+     * <code>repeated string tags = 13;</code>
+     *
+     * @param value The bytes of the tags to add.
+     * @return This builder for chaining.
+     */
+    public Builder addTagsBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+      ensureTagsIsMutable();
+      tags_.add(value);
+      onChanged();
+      return this;
+    }
+
+    private com.google.cloud.retail.v2.PriceInfo priceInfo_;
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.cloud.retail.v2.PriceInfo,
+            com.google.cloud.retail.v2.PriceInfo.Builder,
+            com.google.cloud.retail.v2.PriceInfoOrBuilder>
+        priceInfoBuilder_;
+    /**
+     *
+     *
+     * <pre>
+     * Product price and cost information.
+     * Google Merchant Center property
+     * [price](https://support.google.com/merchants/answer/6324371).
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.PriceInfo price_info = 14;</code>
+     *
+     * @return Whether the priceInfo field is set.
+     */
+    public boolean hasPriceInfo() {
+      return priceInfoBuilder_ != null || priceInfo_ != null;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Product price and cost information.
+     * Google Merchant Center property
+     * [price](https://support.google.com/merchants/answer/6324371).
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.PriceInfo price_info = 14;</code>
+     *
+     * @return The priceInfo.
+     */
+    public com.google.cloud.retail.v2.PriceInfo getPriceInfo() {
+      if (priceInfoBuilder_ == null) {
+        return priceInfo_ == null
+            ? com.google.cloud.retail.v2.PriceInfo.getDefaultInstance()
+            : priceInfo_;
+      } else {
+        return priceInfoBuilder_.getMessage();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Product price and cost information.
+     * Google Merchant Center property
+     * [price](https://support.google.com/merchants/answer/6324371).
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.PriceInfo price_info = 14;</code>
+     */
+    public Builder setPriceInfo(com.google.cloud.retail.v2.PriceInfo value) {
+      if (priceInfoBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        priceInfo_ = value;
+        onChanged();
+      } else {
+        priceInfoBuilder_.setMessage(value);
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Product price and cost information.
+     * Google Merchant Center property
+     * [price](https://support.google.com/merchants/answer/6324371).
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.PriceInfo price_info = 14;</code>
+     */
+    public Builder setPriceInfo(com.google.cloud.retail.v2.PriceInfo.Builder builderForValue) {
+      if (priceInfoBuilder_ == null) {
+        priceInfo_ = builderForValue.build();
+        onChanged();
+      } else {
+        priceInfoBuilder_.setMessage(builderForValue.build());
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Product price and cost information.
+     * Google Merchant Center property
+     * [price](https://support.google.com/merchants/answer/6324371).
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.PriceInfo price_info = 14;</code>
+     */
+    public Builder mergePriceInfo(com.google.cloud.retail.v2.PriceInfo value) {
+      if (priceInfoBuilder_ == null) {
+        if (priceInfo_ != null) {
+          priceInfo_ =
+              com.google.cloud.retail.v2.PriceInfo.newBuilder(priceInfo_)
+                  .mergeFrom(value)
+                  .buildPartial();
+        } else {
+          priceInfo_ = value;
+        }
+        onChanged();
+      } else {
+        priceInfoBuilder_.mergeFrom(value);
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Product price and cost information.
+     * Google Merchant Center property
+     * [price](https://support.google.com/merchants/answer/6324371).
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.PriceInfo price_info = 14;</code>
+     */
+    public Builder clearPriceInfo() {
+      if (priceInfoBuilder_ == null) {
+        priceInfo_ = null;
+        onChanged();
+      } else {
+        priceInfo_ = null;
+        priceInfoBuilder_ = null;
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Product price and cost information.
+     * Google Merchant Center property
+     * [price](https://support.google.com/merchants/answer/6324371).
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.PriceInfo price_info = 14;</code>
+     */
+    public com.google.cloud.retail.v2.PriceInfo.Builder getPriceInfoBuilder() {
+
+      onChanged();
+      return getPriceInfoFieldBuilder().getBuilder();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Product price and cost information.
+     * Google Merchant Center property
+     * [price](https://support.google.com/merchants/answer/6324371).
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.PriceInfo price_info = 14;</code>
+     */
+    public com.google.cloud.retail.v2.PriceInfoOrBuilder getPriceInfoOrBuilder() {
+      if (priceInfoBuilder_ != null) {
+        return priceInfoBuilder_.getMessageOrBuilder();
+      } else {
+        return priceInfo_ == null
+            ? com.google.cloud.retail.v2.PriceInfo.getDefaultInstance()
+            : priceInfo_;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Product price and cost information.
+     * Google Merchant Center property
+     * [price](https://support.google.com/merchants/answer/6324371).
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.PriceInfo price_info = 14;</code>
+     */
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.cloud.retail.v2.PriceInfo,
+            com.google.cloud.retail.v2.PriceInfo.Builder,
+            com.google.cloud.retail.v2.PriceInfoOrBuilder>
+        getPriceInfoFieldBuilder() {
+      if (priceInfoBuilder_ == null) {
+        priceInfoBuilder_ =
+            new com.google.protobuf.SingleFieldBuilderV3<
+                com.google.cloud.retail.v2.PriceInfo,
+                com.google.cloud.retail.v2.PriceInfo.Builder,
+                com.google.cloud.retail.v2.PriceInfoOrBuilder>(
+                getPriceInfo(), getParentForChildren(), isClean());
+        priceInfo_ = null;
+      }
+      return priceInfoBuilder_;
+    }
+
+    private com.google.protobuf.Timestamp availableTime_;
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.protobuf.Timestamp,
+            com.google.protobuf.Timestamp.Builder,
+            com.google.protobuf.TimestampOrBuilder>
+        availableTimeBuilder_;
+    /**
+     *
+     *
+     * <pre>
+     * The timestamp when this [Product][google.cloud.retail.v2.Product] becomes
+     * available recommendation and search.
+     * </pre>
+     *
+     * <code>.google.protobuf.Timestamp available_time = 18;</code>
+     *
+     * @return Whether the availableTime field is set.
+     */
+    public boolean hasAvailableTime() {
+      return availableTimeBuilder_ != null || availableTime_ != null;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The timestamp when this [Product][google.cloud.retail.v2.Product] becomes
+     * available recommendation and search.
+     * </pre>
+     *
+     * <code>.google.protobuf.Timestamp available_time = 18;</code>
+     *
+     * @return The availableTime.
+     */
+    public com.google.protobuf.Timestamp getAvailableTime() {
+      if (availableTimeBuilder_ == null) {
+        return availableTime_ == null
+            ? com.google.protobuf.Timestamp.getDefaultInstance()
+            : availableTime_;
+      } else {
+        return availableTimeBuilder_.getMessage();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The timestamp when this [Product][google.cloud.retail.v2.Product] becomes
+     * available recommendation and search.
+     * </pre>
+     *
+     * <code>.google.protobuf.Timestamp available_time = 18;</code>
+     */
+    public Builder setAvailableTime(com.google.protobuf.Timestamp value) {
+      if (availableTimeBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        availableTime_ = value;
+        onChanged();
+      } else {
+        availableTimeBuilder_.setMessage(value);
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The timestamp when this [Product][google.cloud.retail.v2.Product] becomes
+     * available recommendation and search.
+     * </pre>
+     *
+     * <code>.google.protobuf.Timestamp available_time = 18;</code>
+     */
+    public Builder setAvailableTime(com.google.protobuf.Timestamp.Builder builderForValue) {
+      if (availableTimeBuilder_ == null) {
+        availableTime_ = builderForValue.build();
+        onChanged();
+      } else {
+        availableTimeBuilder_.setMessage(builderForValue.build());
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The timestamp when this [Product][google.cloud.retail.v2.Product] becomes
+     * available recommendation and search.
+     * </pre>
+     *
+     * <code>.google.protobuf.Timestamp available_time = 18;</code>
+     */
+    public Builder mergeAvailableTime(com.google.protobuf.Timestamp value) {
+      if (availableTimeBuilder_ == null) {
+        if (availableTime_ != null) {
+          availableTime_ =
+              com.google.protobuf.Timestamp.newBuilder(availableTime_)
+                  .mergeFrom(value)
+                  .buildPartial();
+        } else {
+          availableTime_ = value;
+        }
+        onChanged();
+      } else {
+        availableTimeBuilder_.mergeFrom(value);
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The timestamp when this [Product][google.cloud.retail.v2.Product] becomes
+     * available recommendation and search.
+     * </pre>
+     *
+     * <code>.google.protobuf.Timestamp available_time = 18;</code>
+     */
+    public Builder clearAvailableTime() {
+      if (availableTimeBuilder_ == null) {
+        availableTime_ = null;
+        onChanged();
+      } else {
+        availableTime_ = null;
+        availableTimeBuilder_ = null;
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The timestamp when this [Product][google.cloud.retail.v2.Product] becomes
+     * available recommendation and search.
+     * </pre>
+     *
+     * <code>.google.protobuf.Timestamp available_time = 18;</code>
+     */
+    public com.google.protobuf.Timestamp.Builder getAvailableTimeBuilder() {
+
+      onChanged();
+      return getAvailableTimeFieldBuilder().getBuilder();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The timestamp when this [Product][google.cloud.retail.v2.Product] becomes
+     * available recommendation and search.
+     * </pre>
+     *
+     * <code>.google.protobuf.Timestamp available_time = 18;</code>
+     */
+    public com.google.protobuf.TimestampOrBuilder getAvailableTimeOrBuilder() {
+      if (availableTimeBuilder_ != null) {
+        return availableTimeBuilder_.getMessageOrBuilder();
+      } else {
+        return availableTime_ == null
+            ? com.google.protobuf.Timestamp.getDefaultInstance()
+            : availableTime_;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The timestamp when this [Product][google.cloud.retail.v2.Product] becomes
+     * available recommendation and search.
+     * </pre>
+     *
+     * <code>.google.protobuf.Timestamp available_time = 18;</code>
+     */
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.protobuf.Timestamp,
+            com.google.protobuf.Timestamp.Builder,
+            com.google.protobuf.TimestampOrBuilder>
+        getAvailableTimeFieldBuilder() {
+      if (availableTimeBuilder_ == null) {
+        availableTimeBuilder_ =
+            new com.google.protobuf.SingleFieldBuilderV3<
+                com.google.protobuf.Timestamp,
+                com.google.protobuf.Timestamp.Builder,
+                com.google.protobuf.TimestampOrBuilder>(
+                getAvailableTime(), getParentForChildren(), isClean());
+        availableTime_ = null;
+      }
+      return availableTimeBuilder_;
+    }
+
+    private int availability_ = 0;
+    /**
+     *
+     *
+     * <pre>
+     * The online availability of the [Product][google.cloud.retail.v2.Product].
+     * Default to
+     * [Availability.IN_STOCK][google.cloud.retail.v2.Product.Availability.IN_STOCK].
+     * Google Merchant Center Property
+     * [availability](https://support.google.com/merchants/answer/6324448).
+     * Schema.org Property [Offer.availability](https://schema.org/availability).
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.Product.Availability availability = 19;</code>
+     *
+     * @return The enum numeric value on the wire for availability.
+     */
+    @java.lang.Override
+    public int getAvailabilityValue() {
+      return availability_;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The online availability of the [Product][google.cloud.retail.v2.Product].
+     * Default to
+     * [Availability.IN_STOCK][google.cloud.retail.v2.Product.Availability.IN_STOCK].
+     * Google Merchant Center Property
+     * [availability](https://support.google.com/merchants/answer/6324448).
+     * Schema.org Property [Offer.availability](https://schema.org/availability).
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.Product.Availability availability = 19;</code>
+     *
+     * @param value The enum numeric value on the wire for availability to set.
+     * @return This builder for chaining.
+     */
+    public Builder setAvailabilityValue(int value) {
+
+      availability_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The online availability of the [Product][google.cloud.retail.v2.Product].
+     * Default to
+     * [Availability.IN_STOCK][google.cloud.retail.v2.Product.Availability.IN_STOCK].
+     * Google Merchant Center Property
+     * [availability](https://support.google.com/merchants/answer/6324448).
+     * Schema.org Property [Offer.availability](https://schema.org/availability).
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.Product.Availability availability = 19;</code>
+     *
+     * @return The availability.
+     */
+    @java.lang.Override
+    public com.google.cloud.retail.v2.Product.Availability getAvailability() {
+      @SuppressWarnings("deprecation")
+      com.google.cloud.retail.v2.Product.Availability result =
+          com.google.cloud.retail.v2.Product.Availability.valueOf(availability_);
+      return result == null ? com.google.cloud.retail.v2.Product.Availability.UNRECOGNIZED : result;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The online availability of the [Product][google.cloud.retail.v2.Product].
+     * Default to
+     * [Availability.IN_STOCK][google.cloud.retail.v2.Product.Availability.IN_STOCK].
+     * Google Merchant Center Property
+     * [availability](https://support.google.com/merchants/answer/6324448).
+     * Schema.org Property [Offer.availability](https://schema.org/availability).
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.Product.Availability availability = 19;</code>
+     *
+     * @param value The availability to set.
+     * @return This builder for chaining.
+     */
+    public Builder setAvailability(com.google.cloud.retail.v2.Product.Availability value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+
+      availability_ = value.getNumber();
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The online availability of the [Product][google.cloud.retail.v2.Product].
+     * Default to
+     * [Availability.IN_STOCK][google.cloud.retail.v2.Product.Availability.IN_STOCK].
+     * Google Merchant Center Property
+     * [availability](https://support.google.com/merchants/answer/6324448).
+     * Schema.org Property [Offer.availability](https://schema.org/availability).
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.Product.Availability availability = 19;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearAvailability() {
+
+      availability_ = 0;
+      onChanged();
+      return this;
+    }
+
+    private com.google.protobuf.Int32Value availableQuantity_;
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.protobuf.Int32Value,
+            com.google.protobuf.Int32Value.Builder,
+            com.google.protobuf.Int32ValueOrBuilder>
+        availableQuantityBuilder_;
+    /**
+     *
+     *
+     * <pre>
+     * The available quantity of the item.
+     * </pre>
+     *
+     * <code>.google.protobuf.Int32Value available_quantity = 20;</code>
+     *
+     * @return Whether the availableQuantity field is set.
+     */
+    public boolean hasAvailableQuantity() {
+      return availableQuantityBuilder_ != null || availableQuantity_ != null;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The available quantity of the item.
+     * </pre>
+     *
+     * <code>.google.protobuf.Int32Value available_quantity = 20;</code>
+     *
+     * @return The availableQuantity.
+     */
+    public com.google.protobuf.Int32Value getAvailableQuantity() {
+      if (availableQuantityBuilder_ == null) {
+        return availableQuantity_ == null
+            ? com.google.protobuf.Int32Value.getDefaultInstance()
+            : availableQuantity_;
+      } else {
+        return availableQuantityBuilder_.getMessage();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The available quantity of the item.
+     * </pre>
+     *
+     * <code>.google.protobuf.Int32Value available_quantity = 20;</code>
+     */
+    public Builder setAvailableQuantity(com.google.protobuf.Int32Value value) {
+      if (availableQuantityBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        availableQuantity_ = value;
+        onChanged();
+      } else {
+        availableQuantityBuilder_.setMessage(value);
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The available quantity of the item.
+     * </pre>
+     *
+     * <code>.google.protobuf.Int32Value available_quantity = 20;</code>
+     */
+    public Builder setAvailableQuantity(com.google.protobuf.Int32Value.Builder builderForValue) {
+      if (availableQuantityBuilder_ == null) {
+        availableQuantity_ = builderForValue.build();
+        onChanged();
+      } else {
+        availableQuantityBuilder_.setMessage(builderForValue.build());
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The available quantity of the item.
+     * </pre>
+     *
+     * <code>.google.protobuf.Int32Value available_quantity = 20;</code>
+     */
+    public Builder mergeAvailableQuantity(com.google.protobuf.Int32Value value) {
+      if (availableQuantityBuilder_ == null) {
+        if (availableQuantity_ != null) {
+          availableQuantity_ =
+              com.google.protobuf.Int32Value.newBuilder(availableQuantity_)
+                  .mergeFrom(value)
+                  .buildPartial();
+        } else {
+          availableQuantity_ = value;
+        }
+        onChanged();
+      } else {
+        availableQuantityBuilder_.mergeFrom(value);
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The available quantity of the item.
+     * </pre>
+     *
+     * <code>.google.protobuf.Int32Value available_quantity = 20;</code>
+     */
+    public Builder clearAvailableQuantity() {
+      if (availableQuantityBuilder_ == null) {
+        availableQuantity_ = null;
+        onChanged();
+      } else {
+        availableQuantity_ = null;
+        availableQuantityBuilder_ = null;
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The available quantity of the item.
+     * </pre>
+     *
+     * <code>.google.protobuf.Int32Value available_quantity = 20;</code>
+     */
+    public com.google.protobuf.Int32Value.Builder getAvailableQuantityBuilder() {
+
+      onChanged();
+      return getAvailableQuantityFieldBuilder().getBuilder();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The available quantity of the item.
+     * </pre>
+     *
+     * <code>.google.protobuf.Int32Value available_quantity = 20;</code>
+     */
+    public com.google.protobuf.Int32ValueOrBuilder getAvailableQuantityOrBuilder() {
+      if (availableQuantityBuilder_ != null) {
+        return availableQuantityBuilder_.getMessageOrBuilder();
+      } else {
+        return availableQuantity_ == null
+            ? com.google.protobuf.Int32Value.getDefaultInstance()
+            : availableQuantity_;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The available quantity of the item.
+     * </pre>
+     *
+     * <code>.google.protobuf.Int32Value available_quantity = 20;</code>
+     */
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.protobuf.Int32Value,
+            com.google.protobuf.Int32Value.Builder,
+            com.google.protobuf.Int32ValueOrBuilder>
+        getAvailableQuantityFieldBuilder() {
+      if (availableQuantityBuilder_ == null) {
+        availableQuantityBuilder_ =
+            new com.google.protobuf.SingleFieldBuilderV3<
+                com.google.protobuf.Int32Value,
+                com.google.protobuf.Int32Value.Builder,
+                com.google.protobuf.Int32ValueOrBuilder>(
+                getAvailableQuantity(), getParentForChildren(), isClean());
+        availableQuantity_ = null;
+      }
+      return availableQuantityBuilder_;
+    }
+
+    private java.lang.Object uri_ = "";
+    /**
+     *
+     *
+     * <pre>
+     * Canonical URL directly linking to the product detail page.
+     * This field must be a UTF-8 encoded string with a length limit of 5,000
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * Google Merchant Center property
+     * [link](https://support.google.com/merchants/answer/6324416). Schema.org
+     * property [Offer.url](https://schema.org/url).
+     * </pre>
+     *
+     * <code>string uri = 22;</code>
+     *
+     * @return The uri.
+     */
+    public java.lang.String getUri() {
+      java.lang.Object ref = uri_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        uri_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Canonical URL directly linking to the product detail page.
+     * This field must be a UTF-8 encoded string with a length limit of 5,000
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * Google Merchant Center property
+     * [link](https://support.google.com/merchants/answer/6324416). Schema.org
+     * property [Offer.url](https://schema.org/url).
+     * </pre>
+     *
+     * <code>string uri = 22;</code>
+     *
+     * @return The bytes for uri.
+     */
+    public com.google.protobuf.ByteString getUriBytes() {
+      java.lang.Object ref = uri_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b =
+            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+        uri_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Canonical URL directly linking to the product detail page.
+     * This field must be a UTF-8 encoded string with a length limit of 5,000
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * Google Merchant Center property
+     * [link](https://support.google.com/merchants/answer/6324416). Schema.org
+     * property [Offer.url](https://schema.org/url).
+     * </pre>
+     *
+     * <code>string uri = 22;</code>
+     *
+     * @param value The uri to set.
+     * @return This builder for chaining.
+     */
+    public Builder setUri(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+
+      uri_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Canonical URL directly linking to the product detail page.
+     * This field must be a UTF-8 encoded string with a length limit of 5,000
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * Google Merchant Center property
+     * [link](https://support.google.com/merchants/answer/6324416). Schema.org
+     * property [Offer.url](https://schema.org/url).
+     * </pre>
+     *
+     * <code>string uri = 22;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearUri() {
+
+      uri_ = getDefaultInstance().getUri();
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Canonical URL directly linking to the product detail page.
+     * This field must be a UTF-8 encoded string with a length limit of 5,000
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * Google Merchant Center property
+     * [link](https://support.google.com/merchants/answer/6324416). Schema.org
+     * property [Offer.url](https://schema.org/url).
+     * </pre>
+     *
+     * <code>string uri = 22;</code>
+     *
+     * @param value The bytes for uri to set.
+     * @return This builder for chaining.
+     */
+    public Builder setUriBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+
+      uri_ = value;
+      onChanged();
+      return this;
+    }
+
+    private java.util.List<com.google.cloud.retail.v2.Image> images_ =
+        java.util.Collections.emptyList();
+
+    private void ensureImagesIsMutable() {
+      if (!((bitField0_ & 0x00000008) != 0)) {
+        images_ = new java.util.ArrayList<com.google.cloud.retail.v2.Image>(images_);
+        bitField0_ |= 0x00000008;
+      }
+    }
+
+    private com.google.protobuf.RepeatedFieldBuilderV3<
+            com.google.cloud.retail.v2.Image,
+            com.google.cloud.retail.v2.Image.Builder,
+            com.google.cloud.retail.v2.ImageOrBuilder>
+        imagesBuilder_;
+
+    /**
+     *
+     *
+     * <pre>
+     * Product images for the product.
+     * A maximum of 300 images are allowed.
+     * Google Merchant Center property
+     * [image_link](https://support.google.com/merchants/answer/6324350).
+     * Schema.org property [Product.image](https://schema.org/image).
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.Image images = 23;</code>
+     */
+    public java.util.List<com.google.cloud.retail.v2.Image> getImagesList() {
+      if (imagesBuilder_ == null) {
+        return java.util.Collections.unmodifiableList(images_);
+      } else {
+        return imagesBuilder_.getMessageList();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Product images for the product.
+     * A maximum of 300 images are allowed.
+     * Google Merchant Center property
+     * [image_link](https://support.google.com/merchants/answer/6324350).
+     * Schema.org property [Product.image](https://schema.org/image).
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.Image images = 23;</code>
+     */
+    public int getImagesCount() {
+      if (imagesBuilder_ == null) {
+        return images_.size();
+      } else {
+        return imagesBuilder_.getCount();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Product images for the product.
+     * A maximum of 300 images are allowed.
+     * Google Merchant Center property
+     * [image_link](https://support.google.com/merchants/answer/6324350).
+     * Schema.org property [Product.image](https://schema.org/image).
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.Image images = 23;</code>
+     */
+    public com.google.cloud.retail.v2.Image getImages(int index) {
+      if (imagesBuilder_ == null) {
+        return images_.get(index);
+      } else {
+        return imagesBuilder_.getMessage(index);
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Product images for the product.
+     * A maximum of 300 images are allowed.
+     * Google Merchant Center property
+     * [image_link](https://support.google.com/merchants/answer/6324350).
+     * Schema.org property [Product.image](https://schema.org/image).
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.Image images = 23;</code>
+     */
+    public Builder setImages(int index, com.google.cloud.retail.v2.Image value) {
+      if (imagesBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        ensureImagesIsMutable();
+        images_.set(index, value);
+        onChanged();
+      } else {
+        imagesBuilder_.setMessage(index, value);
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Product images for the product.
+     * A maximum of 300 images are allowed.
+     * Google Merchant Center property
+     * [image_link](https://support.google.com/merchants/answer/6324350).
+     * Schema.org property [Product.image](https://schema.org/image).
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.Image images = 23;</code>
+     */
+    public Builder setImages(int index, com.google.cloud.retail.v2.Image.Builder builderForValue) {
+      if (imagesBuilder_ == null) {
+        ensureImagesIsMutable();
+        images_.set(index, builderForValue.build());
+        onChanged();
+      } else {
+        imagesBuilder_.setMessage(index, builderForValue.build());
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Product images for the product.
+     * A maximum of 300 images are allowed.
+     * Google Merchant Center property
+     * [image_link](https://support.google.com/merchants/answer/6324350).
+     * Schema.org property [Product.image](https://schema.org/image).
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.Image images = 23;</code>
+     */
+    public Builder addImages(com.google.cloud.retail.v2.Image value) {
+      if (imagesBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        ensureImagesIsMutable();
+        images_.add(value);
+        onChanged();
+      } else {
+        imagesBuilder_.addMessage(value);
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Product images for the product.
+     * A maximum of 300 images are allowed.
+     * Google Merchant Center property
+     * [image_link](https://support.google.com/merchants/answer/6324350).
+     * Schema.org property [Product.image](https://schema.org/image).
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.Image images = 23;</code>
+     */
+    public Builder addImages(int index, com.google.cloud.retail.v2.Image value) {
+      if (imagesBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        ensureImagesIsMutable();
+        images_.add(index, value);
+        onChanged();
+      } else {
+        imagesBuilder_.addMessage(index, value);
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Product images for the product.
+     * A maximum of 300 images are allowed.
+     * Google Merchant Center property
+     * [image_link](https://support.google.com/merchants/answer/6324350).
+     * Schema.org property [Product.image](https://schema.org/image).
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.Image images = 23;</code>
+     */
+    public Builder addImages(com.google.cloud.retail.v2.Image.Builder builderForValue) {
+      if (imagesBuilder_ == null) {
+        ensureImagesIsMutable();
+        images_.add(builderForValue.build());
+        onChanged();
+      } else {
+        imagesBuilder_.addMessage(builderForValue.build());
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Product images for the product.
+     * A maximum of 300 images are allowed.
+     * Google Merchant Center property
+     * [image_link](https://support.google.com/merchants/answer/6324350).
+     * Schema.org property [Product.image](https://schema.org/image).
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.Image images = 23;</code>
+     */
+    public Builder addImages(int index, com.google.cloud.retail.v2.Image.Builder builderForValue) {
+      if (imagesBuilder_ == null) {
+        ensureImagesIsMutable();
+        images_.add(index, builderForValue.build());
+        onChanged();
+      } else {
+        imagesBuilder_.addMessage(index, builderForValue.build());
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Product images for the product.
+     * A maximum of 300 images are allowed.
+     * Google Merchant Center property
+     * [image_link](https://support.google.com/merchants/answer/6324350).
+     * Schema.org property [Product.image](https://schema.org/image).
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.Image images = 23;</code>
+     */
+    public Builder addAllImages(
+        java.lang.Iterable<? extends com.google.cloud.retail.v2.Image> values) {
+      if (imagesBuilder_ == null) {
+        ensureImagesIsMutable();
+        com.google.protobuf.AbstractMessageLite.Builder.addAll(values, images_);
+        onChanged();
+      } else {
+        imagesBuilder_.addAllMessages(values);
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Product images for the product.
+     * A maximum of 300 images are allowed.
+     * Google Merchant Center property
+     * [image_link](https://support.google.com/merchants/answer/6324350).
+     * Schema.org property [Product.image](https://schema.org/image).
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.Image images = 23;</code>
+     */
+    public Builder clearImages() {
+      if (imagesBuilder_ == null) {
+        images_ = java.util.Collections.emptyList();
+        bitField0_ = (bitField0_ & ~0x00000008);
+        onChanged();
+      } else {
+        imagesBuilder_.clear();
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Product images for the product.
+     * A maximum of 300 images are allowed.
+     * Google Merchant Center property
+     * [image_link](https://support.google.com/merchants/answer/6324350).
+     * Schema.org property [Product.image](https://schema.org/image).
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.Image images = 23;</code>
+     */
+    public Builder removeImages(int index) {
+      if (imagesBuilder_ == null) {
+        ensureImagesIsMutable();
+        images_.remove(index);
+        onChanged();
+      } else {
+        imagesBuilder_.remove(index);
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Product images for the product.
+     * A maximum of 300 images are allowed.
+     * Google Merchant Center property
+     * [image_link](https://support.google.com/merchants/answer/6324350).
+     * Schema.org property [Product.image](https://schema.org/image).
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.Image images = 23;</code>
+     */
+    public com.google.cloud.retail.v2.Image.Builder getImagesBuilder(int index) {
+      return getImagesFieldBuilder().getBuilder(index);
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Product images for the product.
+     * A maximum of 300 images are allowed.
+     * Google Merchant Center property
+     * [image_link](https://support.google.com/merchants/answer/6324350).
+     * Schema.org property [Product.image](https://schema.org/image).
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.Image images = 23;</code>
+     */
+    public com.google.cloud.retail.v2.ImageOrBuilder getImagesOrBuilder(int index) {
+      if (imagesBuilder_ == null) {
+        return images_.get(index);
+      } else {
+        return imagesBuilder_.getMessageOrBuilder(index);
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Product images for the product.
+     * A maximum of 300 images are allowed.
+     * Google Merchant Center property
+     * [image_link](https://support.google.com/merchants/answer/6324350).
+     * Schema.org property [Product.image](https://schema.org/image).
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.Image images = 23;</code>
+     */
+    public java.util.List<? extends com.google.cloud.retail.v2.ImageOrBuilder>
+        getImagesOrBuilderList() {
+      if (imagesBuilder_ != null) {
+        return imagesBuilder_.getMessageOrBuilderList();
+      } else {
+        return java.util.Collections.unmodifiableList(images_);
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Product images for the product.
+     * A maximum of 300 images are allowed.
+     * Google Merchant Center property
+     * [image_link](https://support.google.com/merchants/answer/6324350).
+     * Schema.org property [Product.image](https://schema.org/image).
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.Image images = 23;</code>
+     */
+    public com.google.cloud.retail.v2.Image.Builder addImagesBuilder() {
+      return getImagesFieldBuilder()
+          .addBuilder(com.google.cloud.retail.v2.Image.getDefaultInstance());
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Product images for the product.
+     * A maximum of 300 images are allowed.
+     * Google Merchant Center property
+     * [image_link](https://support.google.com/merchants/answer/6324350).
+     * Schema.org property [Product.image](https://schema.org/image).
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.Image images = 23;</code>
+     */
+    public com.google.cloud.retail.v2.Image.Builder addImagesBuilder(int index) {
+      return getImagesFieldBuilder()
+          .addBuilder(index, com.google.cloud.retail.v2.Image.getDefaultInstance());
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Product images for the product.
+     * A maximum of 300 images are allowed.
+     * Google Merchant Center property
+     * [image_link](https://support.google.com/merchants/answer/6324350).
+     * Schema.org property [Product.image](https://schema.org/image).
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.Image images = 23;</code>
+     */
+    public java.util.List<com.google.cloud.retail.v2.Image.Builder> getImagesBuilderList() {
+      return getImagesFieldBuilder().getBuilderList();
+    }
+
+    private com.google.protobuf.RepeatedFieldBuilderV3<
+            com.google.cloud.retail.v2.Image,
+            com.google.cloud.retail.v2.Image.Builder,
+            com.google.cloud.retail.v2.ImageOrBuilder>
+        getImagesFieldBuilder() {
+      if (imagesBuilder_ == null) {
+        imagesBuilder_ =
+            new com.google.protobuf.RepeatedFieldBuilderV3<
+                com.google.cloud.retail.v2.Image,
+                com.google.cloud.retail.v2.Image.Builder,
+                com.google.cloud.retail.v2.ImageOrBuilder>(
+                images_, ((bitField0_ & 0x00000008) != 0), getParentForChildren(), isClean());
+        images_ = null;
+      }
+      return imagesBuilder_;
+    }
+
+    @java.lang.Override
+    public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.setUnknownFields(unknownFields);
+    }
+
+    @java.lang.Override
+    public final Builder mergeUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.mergeUnknownFields(unknownFields);
+    }
+
+    // @@protoc_insertion_point(builder_scope:google.cloud.retail.v2.Product)
+  }
+
+  // @@protoc_insertion_point(class_scope:google.cloud.retail.v2.Product)
+  private static final com.google.cloud.retail.v2.Product DEFAULT_INSTANCE;
+
+  static {
+    DEFAULT_INSTANCE = new com.google.cloud.retail.v2.Product();
+  }
+
+  public static com.google.cloud.retail.v2.Product getDefaultInstance() {
+    return DEFAULT_INSTANCE;
+  }
+
+  private static final com.google.protobuf.Parser<Product> PARSER =
+      new com.google.protobuf.AbstractParser<Product>() {
+        @java.lang.Override
+        public Product parsePartialFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws com.google.protobuf.InvalidProtocolBufferException {
+          return new Product(input, extensionRegistry);
+        }
+      };
+
+  public static com.google.protobuf.Parser<Product> parser() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.protobuf.Parser<Product> getParserForType() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.cloud.retail.v2.Product getDefaultInstanceForType() {
+    return DEFAULT_INSTANCE;
+  }
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ProductDetail.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ProductDetail.java
new file mode 100644
index 00000000..1ee2338a
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ProductDetail.java
@@ -0,0 +1,1079 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/user_event.proto
+
+package com.google.cloud.retail.v2;
+
+/**
+ *
+ *
+ * <pre>
+ * Detailed product information associated with a user event.
+ * </pre>
+ *
+ * Protobuf type {@code google.cloud.retail.v2.ProductDetail}
+ */
+public final class ProductDetail extends com.google.protobuf.GeneratedMessageV3
+    implements
+    // @@protoc_insertion_point(message_implements:google.cloud.retail.v2.ProductDetail)
+    ProductDetailOrBuilder {
+  private static final long serialVersionUID = 0L;
+  // Use ProductDetail.newBuilder() to construct.
+  private ProductDetail(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+    super(builder);
+  }
+
+  private ProductDetail() {}
+
+  @java.lang.Override
+  @SuppressWarnings({"unused"})
+  protected java.lang.Object newInstance(UnusedPrivateParameter unused) {
+    return new ProductDetail();
+  }
+
+  @java.lang.Override
+  public final com.google.protobuf.UnknownFieldSet getUnknownFields() {
+    return this.unknownFields;
+  }
+
+  private ProductDetail(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    this();
+    if (extensionRegistry == null) {
+      throw new java.lang.NullPointerException();
+    }
+    com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+        com.google.protobuf.UnknownFieldSet.newBuilder();
+    try {
+      boolean done = false;
+      while (!done) {
+        int tag = input.readTag();
+        switch (tag) {
+          case 0:
+            done = true;
+            break;
+          case 10:
+            {
+              com.google.cloud.retail.v2.Product.Builder subBuilder = null;
+              if (product_ != null) {
+                subBuilder = product_.toBuilder();
+              }
+              product_ =
+                  input.readMessage(com.google.cloud.retail.v2.Product.parser(), extensionRegistry);
+              if (subBuilder != null) {
+                subBuilder.mergeFrom(product_);
+                product_ = subBuilder.buildPartial();
+              }
+
+              break;
+            }
+          case 18:
+            {
+              com.google.protobuf.Int32Value.Builder subBuilder = null;
+              if (quantity_ != null) {
+                subBuilder = quantity_.toBuilder();
+              }
+              quantity_ =
+                  input.readMessage(com.google.protobuf.Int32Value.parser(), extensionRegistry);
+              if (subBuilder != null) {
+                subBuilder.mergeFrom(quantity_);
+                quantity_ = subBuilder.buildPartial();
+              }
+
+              break;
+            }
+          default:
+            {
+              if (!parseUnknownField(input, unknownFields, extensionRegistry, tag)) {
+                done = true;
+              }
+              break;
+            }
+        }
+      }
+    } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+      throw e.setUnfinishedMessage(this);
+    } catch (java.io.IOException e) {
+      throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
+    } finally {
+      this.unknownFields = unknownFields.build();
+      makeExtensionsImmutable();
+    }
+  }
+
+  public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+    return com.google.cloud.retail.v2.UserEventProto
+        .internal_static_google_cloud_retail_v2_ProductDetail_descriptor;
+  }
+
+  @java.lang.Override
+  protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internalGetFieldAccessorTable() {
+    return com.google.cloud.retail.v2.UserEventProto
+        .internal_static_google_cloud_retail_v2_ProductDetail_fieldAccessorTable
+        .ensureFieldAccessorsInitialized(
+            com.google.cloud.retail.v2.ProductDetail.class,
+            com.google.cloud.retail.v2.ProductDetail.Builder.class);
+  }
+
+  public static final int PRODUCT_FIELD_NUMBER = 1;
+  private com.google.cloud.retail.v2.Product product_;
+  /**
+   *
+   *
+   * <pre>
+   * Required. [Product][google.cloud.retail.v2.Product] information.
+   * Only [Product.id][google.cloud.retail.v2.Product.id] field is used when
+   * ingesting an event, all other product fields are ignored as we will look
+   * them up from the catalog.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.Product product = 1 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   *
+   * @return Whether the product field is set.
+   */
+  @java.lang.Override
+  public boolean hasProduct() {
+    return product_ != null;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Required. [Product][google.cloud.retail.v2.Product] information.
+   * Only [Product.id][google.cloud.retail.v2.Product.id] field is used when
+   * ingesting an event, all other product fields are ignored as we will look
+   * them up from the catalog.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.Product product = 1 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   *
+   * @return The product.
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.Product getProduct() {
+    return product_ == null ? com.google.cloud.retail.v2.Product.getDefaultInstance() : product_;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Required. [Product][google.cloud.retail.v2.Product] information.
+   * Only [Product.id][google.cloud.retail.v2.Product.id] field is used when
+   * ingesting an event, all other product fields are ignored as we will look
+   * them up from the catalog.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.Product product = 1 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.ProductOrBuilder getProductOrBuilder() {
+    return getProduct();
+  }
+
+  public static final int QUANTITY_FIELD_NUMBER = 2;
+  private com.google.protobuf.Int32Value quantity_;
+  /**
+   *
+   *
+   * <pre>
+   * Quantity of the product associated with the user event.
+   * For example, this field will be 2 if two products are added to the shopping
+   * cart for `purchase-complete` event. Required for `add-to-cart` and
+   * `purchase-complete` event types.
+   * </pre>
+   *
+   * <code>.google.protobuf.Int32Value quantity = 2;</code>
+   *
+   * @return Whether the quantity field is set.
+   */
+  @java.lang.Override
+  public boolean hasQuantity() {
+    return quantity_ != null;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Quantity of the product associated with the user event.
+   * For example, this field will be 2 if two products are added to the shopping
+   * cart for `purchase-complete` event. Required for `add-to-cart` and
+   * `purchase-complete` event types.
+   * </pre>
+   *
+   * <code>.google.protobuf.Int32Value quantity = 2;</code>
+   *
+   * @return The quantity.
+   */
+  @java.lang.Override
+  public com.google.protobuf.Int32Value getQuantity() {
+    return quantity_ == null ? com.google.protobuf.Int32Value.getDefaultInstance() : quantity_;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Quantity of the product associated with the user event.
+   * For example, this field will be 2 if two products are added to the shopping
+   * cart for `purchase-complete` event. Required for `add-to-cart` and
+   * `purchase-complete` event types.
+   * </pre>
+   *
+   * <code>.google.protobuf.Int32Value quantity = 2;</code>
+   */
+  @java.lang.Override
+  public com.google.protobuf.Int32ValueOrBuilder getQuantityOrBuilder() {
+    return getQuantity();
+  }
+
+  private byte memoizedIsInitialized = -1;
+
+  @java.lang.Override
+  public final boolean isInitialized() {
+    byte isInitialized = memoizedIsInitialized;
+    if (isInitialized == 1) return true;
+    if (isInitialized == 0) return false;
+
+    memoizedIsInitialized = 1;
+    return true;
+  }
+
+  @java.lang.Override
+  public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
+    if (product_ != null) {
+      output.writeMessage(1, getProduct());
+    }
+    if (quantity_ != null) {
+      output.writeMessage(2, getQuantity());
+    }
+    unknownFields.writeTo(output);
+  }
+
+  @java.lang.Override
+  public int getSerializedSize() {
+    int size = memoizedSize;
+    if (size != -1) return size;
+
+    size = 0;
+    if (product_ != null) {
+      size += com.google.protobuf.CodedOutputStream.computeMessageSize(1, getProduct());
+    }
+    if (quantity_ != null) {
+      size += com.google.protobuf.CodedOutputStream.computeMessageSize(2, getQuantity());
+    }
+    size += unknownFields.getSerializedSize();
+    memoizedSize = size;
+    return size;
+  }
+
+  @java.lang.Override
+  public boolean equals(final java.lang.Object obj) {
+    if (obj == this) {
+      return true;
+    }
+    if (!(obj instanceof com.google.cloud.retail.v2.ProductDetail)) {
+      return super.equals(obj);
+    }
+    com.google.cloud.retail.v2.ProductDetail other = (com.google.cloud.retail.v2.ProductDetail) obj;
+
+    if (hasProduct() != other.hasProduct()) return false;
+    if (hasProduct()) {
+      if (!getProduct().equals(other.getProduct())) return false;
+    }
+    if (hasQuantity() != other.hasQuantity()) return false;
+    if (hasQuantity()) {
+      if (!getQuantity().equals(other.getQuantity())) return false;
+    }
+    if (!unknownFields.equals(other.unknownFields)) return false;
+    return true;
+  }
+
+  @java.lang.Override
+  public int hashCode() {
+    if (memoizedHashCode != 0) {
+      return memoizedHashCode;
+    }
+    int hash = 41;
+    hash = (19 * hash) + getDescriptor().hashCode();
+    if (hasProduct()) {
+      hash = (37 * hash) + PRODUCT_FIELD_NUMBER;
+      hash = (53 * hash) + getProduct().hashCode();
+    }
+    if (hasQuantity()) {
+      hash = (37 * hash) + QUANTITY_FIELD_NUMBER;
+      hash = (53 * hash) + getQuantity().hashCode();
+    }
+    hash = (29 * hash) + unknownFields.hashCode();
+    memoizedHashCode = hash;
+    return hash;
+  }
+
+  public static com.google.cloud.retail.v2.ProductDetail parseFrom(java.nio.ByteBuffer data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.ProductDetail parseFrom(
+      java.nio.ByteBuffer data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.ProductDetail parseFrom(
+      com.google.protobuf.ByteString data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.ProductDetail parseFrom(
+      com.google.protobuf.ByteString data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.ProductDetail parseFrom(byte[] data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.ProductDetail parseFrom(
+      byte[] data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.ProductDetail parseFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.ProductDetail parseFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.ProductDetail parseDelimitedFrom(
+      java.io.InputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.ProductDetail parseDelimitedFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.ProductDetail parseFrom(
+      com.google.protobuf.CodedInputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.ProductDetail parseFrom(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  @java.lang.Override
+  public Builder newBuilderForType() {
+    return newBuilder();
+  }
+
+  public static Builder newBuilder() {
+    return DEFAULT_INSTANCE.toBuilder();
+  }
+
+  public static Builder newBuilder(com.google.cloud.retail.v2.ProductDetail prototype) {
+    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+  }
+
+  @java.lang.Override
+  public Builder toBuilder() {
+    return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
+  }
+
+  @java.lang.Override
+  protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+    Builder builder = new Builder(parent);
+    return builder;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Detailed product information associated with a user event.
+   * </pre>
+   *
+   * Protobuf type {@code google.cloud.retail.v2.ProductDetail}
+   */
+  public static final class Builder extends com.google.protobuf.GeneratedMessageV3.Builder<Builder>
+      implements
+      // @@protoc_insertion_point(builder_implements:google.cloud.retail.v2.ProductDetail)
+      com.google.cloud.retail.v2.ProductDetailOrBuilder {
+    public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+      return com.google.cloud.retail.v2.UserEventProto
+          .internal_static_google_cloud_retail_v2_ProductDetail_descriptor;
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return com.google.cloud.retail.v2.UserEventProto
+          .internal_static_google_cloud_retail_v2_ProductDetail_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              com.google.cloud.retail.v2.ProductDetail.class,
+              com.google.cloud.retail.v2.ProductDetail.Builder.class);
+    }
+
+    // Construct using com.google.cloud.retail.v2.ProductDetail.newBuilder()
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
+
+    private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+      super(parent);
+      maybeForceBuilderInitialization();
+    }
+
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders) {}
+    }
+
+    @java.lang.Override
+    public Builder clear() {
+      super.clear();
+      if (productBuilder_ == null) {
+        product_ = null;
+      } else {
+        product_ = null;
+        productBuilder_ = null;
+      }
+      if (quantityBuilder_ == null) {
+        quantity_ = null;
+      } else {
+        quantity_ = null;
+        quantityBuilder_ = null;
+      }
+      return this;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
+      return com.google.cloud.retail.v2.UserEventProto
+          .internal_static_google_cloud_retail_v2_ProductDetail_descriptor;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.ProductDetail getDefaultInstanceForType() {
+      return com.google.cloud.retail.v2.ProductDetail.getDefaultInstance();
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.ProductDetail build() {
+      com.google.cloud.retail.v2.ProductDetail result = buildPartial();
+      if (!result.isInitialized()) {
+        throw newUninitializedMessageException(result);
+      }
+      return result;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.ProductDetail buildPartial() {
+      com.google.cloud.retail.v2.ProductDetail result =
+          new com.google.cloud.retail.v2.ProductDetail(this);
+      if (productBuilder_ == null) {
+        result.product_ = product_;
+      } else {
+        result.product_ = productBuilder_.build();
+      }
+      if (quantityBuilder_ == null) {
+        result.quantity_ = quantity_;
+      } else {
+        result.quantity_ = quantityBuilder_.build();
+      }
+      onBuilt();
+      return result;
+    }
+
+    @java.lang.Override
+    public Builder clone() {
+      return super.clone();
+    }
+
+    @java.lang.Override
+    public Builder setField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.setField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
+      return super.clearField(field);
+    }
+
+    @java.lang.Override
+    public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+      return super.clearOneof(oneof);
+    }
+
+    @java.lang.Override
+    public Builder setRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, int index, java.lang.Object value) {
+      return super.setRepeatedField(field, index, value);
+    }
+
+    @java.lang.Override
+    public Builder addRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.addRepeatedField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(com.google.protobuf.Message other) {
+      if (other instanceof com.google.cloud.retail.v2.ProductDetail) {
+        return mergeFrom((com.google.cloud.retail.v2.ProductDetail) other);
+      } else {
+        super.mergeFrom(other);
+        return this;
+      }
+    }
+
+    public Builder mergeFrom(com.google.cloud.retail.v2.ProductDetail other) {
+      if (other == com.google.cloud.retail.v2.ProductDetail.getDefaultInstance()) return this;
+      if (other.hasProduct()) {
+        mergeProduct(other.getProduct());
+      }
+      if (other.hasQuantity()) {
+        mergeQuantity(other.getQuantity());
+      }
+      this.mergeUnknownFields(other.unknownFields);
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final boolean isInitialized() {
+      return true;
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      com.google.cloud.retail.v2.ProductDetail parsedMessage = null;
+      try {
+        parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        parsedMessage = (com.google.cloud.retail.v2.ProductDetail) e.getUnfinishedMessage();
+        throw e.unwrapIOException();
+      } finally {
+        if (parsedMessage != null) {
+          mergeFrom(parsedMessage);
+        }
+      }
+      return this;
+    }
+
+    private com.google.cloud.retail.v2.Product product_;
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.cloud.retail.v2.Product,
+            com.google.cloud.retail.v2.Product.Builder,
+            com.google.cloud.retail.v2.ProductOrBuilder>
+        productBuilder_;
+    /**
+     *
+     *
+     * <pre>
+     * Required. [Product][google.cloud.retail.v2.Product] information.
+     * Only [Product.id][google.cloud.retail.v2.Product.id] field is used when
+     * ingesting an event, all other product fields are ignored as we will look
+     * them up from the catalog.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.Product product = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     *
+     * @return Whether the product field is set.
+     */
+    public boolean hasProduct() {
+      return productBuilder_ != null || product_ != null;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. [Product][google.cloud.retail.v2.Product] information.
+     * Only [Product.id][google.cloud.retail.v2.Product.id] field is used when
+     * ingesting an event, all other product fields are ignored as we will look
+     * them up from the catalog.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.Product product = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     *
+     * @return The product.
+     */
+    public com.google.cloud.retail.v2.Product getProduct() {
+      if (productBuilder_ == null) {
+        return product_ == null
+            ? com.google.cloud.retail.v2.Product.getDefaultInstance()
+            : product_;
+      } else {
+        return productBuilder_.getMessage();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. [Product][google.cloud.retail.v2.Product] information.
+     * Only [Product.id][google.cloud.retail.v2.Product.id] field is used when
+     * ingesting an event, all other product fields are ignored as we will look
+     * them up from the catalog.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.Product product = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder setProduct(com.google.cloud.retail.v2.Product value) {
+      if (productBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        product_ = value;
+        onChanged();
+      } else {
+        productBuilder_.setMessage(value);
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. [Product][google.cloud.retail.v2.Product] information.
+     * Only [Product.id][google.cloud.retail.v2.Product.id] field is used when
+     * ingesting an event, all other product fields are ignored as we will look
+     * them up from the catalog.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.Product product = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder setProduct(com.google.cloud.retail.v2.Product.Builder builderForValue) {
+      if (productBuilder_ == null) {
+        product_ = builderForValue.build();
+        onChanged();
+      } else {
+        productBuilder_.setMessage(builderForValue.build());
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. [Product][google.cloud.retail.v2.Product] information.
+     * Only [Product.id][google.cloud.retail.v2.Product.id] field is used when
+     * ingesting an event, all other product fields are ignored as we will look
+     * them up from the catalog.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.Product product = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder mergeProduct(com.google.cloud.retail.v2.Product value) {
+      if (productBuilder_ == null) {
+        if (product_ != null) {
+          product_ =
+              com.google.cloud.retail.v2.Product.newBuilder(product_)
+                  .mergeFrom(value)
+                  .buildPartial();
+        } else {
+          product_ = value;
+        }
+        onChanged();
+      } else {
+        productBuilder_.mergeFrom(value);
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. [Product][google.cloud.retail.v2.Product] information.
+     * Only [Product.id][google.cloud.retail.v2.Product.id] field is used when
+     * ingesting an event, all other product fields are ignored as we will look
+     * them up from the catalog.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.Product product = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder clearProduct() {
+      if (productBuilder_ == null) {
+        product_ = null;
+        onChanged();
+      } else {
+        product_ = null;
+        productBuilder_ = null;
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. [Product][google.cloud.retail.v2.Product] information.
+     * Only [Product.id][google.cloud.retail.v2.Product.id] field is used when
+     * ingesting an event, all other product fields are ignored as we will look
+     * them up from the catalog.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.Product product = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public com.google.cloud.retail.v2.Product.Builder getProductBuilder() {
+
+      onChanged();
+      return getProductFieldBuilder().getBuilder();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. [Product][google.cloud.retail.v2.Product] information.
+     * Only [Product.id][google.cloud.retail.v2.Product.id] field is used when
+     * ingesting an event, all other product fields are ignored as we will look
+     * them up from the catalog.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.Product product = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public com.google.cloud.retail.v2.ProductOrBuilder getProductOrBuilder() {
+      if (productBuilder_ != null) {
+        return productBuilder_.getMessageOrBuilder();
+      } else {
+        return product_ == null
+            ? com.google.cloud.retail.v2.Product.getDefaultInstance()
+            : product_;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. [Product][google.cloud.retail.v2.Product] information.
+     * Only [Product.id][google.cloud.retail.v2.Product.id] field is used when
+     * ingesting an event, all other product fields are ignored as we will look
+     * them up from the catalog.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.Product product = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.cloud.retail.v2.Product,
+            com.google.cloud.retail.v2.Product.Builder,
+            com.google.cloud.retail.v2.ProductOrBuilder>
+        getProductFieldBuilder() {
+      if (productBuilder_ == null) {
+        productBuilder_ =
+            new com.google.protobuf.SingleFieldBuilderV3<
+                com.google.cloud.retail.v2.Product,
+                com.google.cloud.retail.v2.Product.Builder,
+                com.google.cloud.retail.v2.ProductOrBuilder>(
+                getProduct(), getParentForChildren(), isClean());
+        product_ = null;
+      }
+      return productBuilder_;
+    }
+
+    private com.google.protobuf.Int32Value quantity_;
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.protobuf.Int32Value,
+            com.google.protobuf.Int32Value.Builder,
+            com.google.protobuf.Int32ValueOrBuilder>
+        quantityBuilder_;
+    /**
+     *
+     *
+     * <pre>
+     * Quantity of the product associated with the user event.
+     * For example, this field will be 2 if two products are added to the shopping
+     * cart for `purchase-complete` event. Required for `add-to-cart` and
+     * `purchase-complete` event types.
+     * </pre>
+     *
+     * <code>.google.protobuf.Int32Value quantity = 2;</code>
+     *
+     * @return Whether the quantity field is set.
+     */
+    public boolean hasQuantity() {
+      return quantityBuilder_ != null || quantity_ != null;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Quantity of the product associated with the user event.
+     * For example, this field will be 2 if two products are added to the shopping
+     * cart for `purchase-complete` event. Required for `add-to-cart` and
+     * `purchase-complete` event types.
+     * </pre>
+     *
+     * <code>.google.protobuf.Int32Value quantity = 2;</code>
+     *
+     * @return The quantity.
+     */
+    public com.google.protobuf.Int32Value getQuantity() {
+      if (quantityBuilder_ == null) {
+        return quantity_ == null ? com.google.protobuf.Int32Value.getDefaultInstance() : quantity_;
+      } else {
+        return quantityBuilder_.getMessage();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Quantity of the product associated with the user event.
+     * For example, this field will be 2 if two products are added to the shopping
+     * cart for `purchase-complete` event. Required for `add-to-cart` and
+     * `purchase-complete` event types.
+     * </pre>
+     *
+     * <code>.google.protobuf.Int32Value quantity = 2;</code>
+     */
+    public Builder setQuantity(com.google.protobuf.Int32Value value) {
+      if (quantityBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        quantity_ = value;
+        onChanged();
+      } else {
+        quantityBuilder_.setMessage(value);
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Quantity of the product associated with the user event.
+     * For example, this field will be 2 if two products are added to the shopping
+     * cart for `purchase-complete` event. Required for `add-to-cart` and
+     * `purchase-complete` event types.
+     * </pre>
+     *
+     * <code>.google.protobuf.Int32Value quantity = 2;</code>
+     */
+    public Builder setQuantity(com.google.protobuf.Int32Value.Builder builderForValue) {
+      if (quantityBuilder_ == null) {
+        quantity_ = builderForValue.build();
+        onChanged();
+      } else {
+        quantityBuilder_.setMessage(builderForValue.build());
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Quantity of the product associated with the user event.
+     * For example, this field will be 2 if two products are added to the shopping
+     * cart for `purchase-complete` event. Required for `add-to-cart` and
+     * `purchase-complete` event types.
+     * </pre>
+     *
+     * <code>.google.protobuf.Int32Value quantity = 2;</code>
+     */
+    public Builder mergeQuantity(com.google.protobuf.Int32Value value) {
+      if (quantityBuilder_ == null) {
+        if (quantity_ != null) {
+          quantity_ =
+              com.google.protobuf.Int32Value.newBuilder(quantity_).mergeFrom(value).buildPartial();
+        } else {
+          quantity_ = value;
+        }
+        onChanged();
+      } else {
+        quantityBuilder_.mergeFrom(value);
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Quantity of the product associated with the user event.
+     * For example, this field will be 2 if two products are added to the shopping
+     * cart for `purchase-complete` event. Required for `add-to-cart` and
+     * `purchase-complete` event types.
+     * </pre>
+     *
+     * <code>.google.protobuf.Int32Value quantity = 2;</code>
+     */
+    public Builder clearQuantity() {
+      if (quantityBuilder_ == null) {
+        quantity_ = null;
+        onChanged();
+      } else {
+        quantity_ = null;
+        quantityBuilder_ = null;
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Quantity of the product associated with the user event.
+     * For example, this field will be 2 if two products are added to the shopping
+     * cart for `purchase-complete` event. Required for `add-to-cart` and
+     * `purchase-complete` event types.
+     * </pre>
+     *
+     * <code>.google.protobuf.Int32Value quantity = 2;</code>
+     */
+    public com.google.protobuf.Int32Value.Builder getQuantityBuilder() {
+
+      onChanged();
+      return getQuantityFieldBuilder().getBuilder();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Quantity of the product associated with the user event.
+     * For example, this field will be 2 if two products are added to the shopping
+     * cart for `purchase-complete` event. Required for `add-to-cart` and
+     * `purchase-complete` event types.
+     * </pre>
+     *
+     * <code>.google.protobuf.Int32Value quantity = 2;</code>
+     */
+    public com.google.protobuf.Int32ValueOrBuilder getQuantityOrBuilder() {
+      if (quantityBuilder_ != null) {
+        return quantityBuilder_.getMessageOrBuilder();
+      } else {
+        return quantity_ == null ? com.google.protobuf.Int32Value.getDefaultInstance() : quantity_;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Quantity of the product associated with the user event.
+     * For example, this field will be 2 if two products are added to the shopping
+     * cart for `purchase-complete` event. Required for `add-to-cart` and
+     * `purchase-complete` event types.
+     * </pre>
+     *
+     * <code>.google.protobuf.Int32Value quantity = 2;</code>
+     */
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.protobuf.Int32Value,
+            com.google.protobuf.Int32Value.Builder,
+            com.google.protobuf.Int32ValueOrBuilder>
+        getQuantityFieldBuilder() {
+      if (quantityBuilder_ == null) {
+        quantityBuilder_ =
+            new com.google.protobuf.SingleFieldBuilderV3<
+                com.google.protobuf.Int32Value,
+                com.google.protobuf.Int32Value.Builder,
+                com.google.protobuf.Int32ValueOrBuilder>(
+                getQuantity(), getParentForChildren(), isClean());
+        quantity_ = null;
+      }
+      return quantityBuilder_;
+    }
+
+    @java.lang.Override
+    public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.setUnknownFields(unknownFields);
+    }
+
+    @java.lang.Override
+    public final Builder mergeUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.mergeUnknownFields(unknownFields);
+    }
+
+    // @@protoc_insertion_point(builder_scope:google.cloud.retail.v2.ProductDetail)
+  }
+
+  // @@protoc_insertion_point(class_scope:google.cloud.retail.v2.ProductDetail)
+  private static final com.google.cloud.retail.v2.ProductDetail DEFAULT_INSTANCE;
+
+  static {
+    DEFAULT_INSTANCE = new com.google.cloud.retail.v2.ProductDetail();
+  }
+
+  public static com.google.cloud.retail.v2.ProductDetail getDefaultInstance() {
+    return DEFAULT_INSTANCE;
+  }
+
+  private static final com.google.protobuf.Parser<ProductDetail> PARSER =
+      new com.google.protobuf.AbstractParser<ProductDetail>() {
+        @java.lang.Override
+        public ProductDetail parsePartialFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws com.google.protobuf.InvalidProtocolBufferException {
+          return new ProductDetail(input, extensionRegistry);
+        }
+      };
+
+  public static com.google.protobuf.Parser<ProductDetail> parser() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.protobuf.Parser<ProductDetail> getParserForType() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.cloud.retail.v2.ProductDetail getDefaultInstanceForType() {
+    return DEFAULT_INSTANCE;
+  }
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ProductDetailOrBuilder.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ProductDetailOrBuilder.java
new file mode 100644
index 00000000..1506b07e
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ProductDetailOrBuilder.java
@@ -0,0 +1,116 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/user_event.proto
+
+package com.google.cloud.retail.v2;
+
+public interface ProductDetailOrBuilder
+    extends
+    // @@protoc_insertion_point(interface_extends:google.cloud.retail.v2.ProductDetail)
+    com.google.protobuf.MessageOrBuilder {
+
+  /**
+   *
+   *
+   * <pre>
+   * Required. [Product][google.cloud.retail.v2.Product] information.
+   * Only [Product.id][google.cloud.retail.v2.Product.id] field is used when
+   * ingesting an event, all other product fields are ignored as we will look
+   * them up from the catalog.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.Product product = 1 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   *
+   * @return Whether the product field is set.
+   */
+  boolean hasProduct();
+  /**
+   *
+   *
+   * <pre>
+   * Required. [Product][google.cloud.retail.v2.Product] information.
+   * Only [Product.id][google.cloud.retail.v2.Product.id] field is used when
+   * ingesting an event, all other product fields are ignored as we will look
+   * them up from the catalog.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.Product product = 1 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   *
+   * @return The product.
+   */
+  com.google.cloud.retail.v2.Product getProduct();
+  /**
+   *
+   *
+   * <pre>
+   * Required. [Product][google.cloud.retail.v2.Product] information.
+   * Only [Product.id][google.cloud.retail.v2.Product.id] field is used when
+   * ingesting an event, all other product fields are ignored as we will look
+   * them up from the catalog.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.Product product = 1 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   */
+  com.google.cloud.retail.v2.ProductOrBuilder getProductOrBuilder();
+
+  /**
+   *
+   *
+   * <pre>
+   * Quantity of the product associated with the user event.
+   * For example, this field will be 2 if two products are added to the shopping
+   * cart for `purchase-complete` event. Required for `add-to-cart` and
+   * `purchase-complete` event types.
+   * </pre>
+   *
+   * <code>.google.protobuf.Int32Value quantity = 2;</code>
+   *
+   * @return Whether the quantity field is set.
+   */
+  boolean hasQuantity();
+  /**
+   *
+   *
+   * <pre>
+   * Quantity of the product associated with the user event.
+   * For example, this field will be 2 if two products are added to the shopping
+   * cart for `purchase-complete` event. Required for `add-to-cart` and
+   * `purchase-complete` event types.
+   * </pre>
+   *
+   * <code>.google.protobuf.Int32Value quantity = 2;</code>
+   *
+   * @return The quantity.
+   */
+  com.google.protobuf.Int32Value getQuantity();
+  /**
+   *
+   *
+   * <pre>
+   * Quantity of the product associated with the user event.
+   * For example, this field will be 2 if two products are added to the shopping
+   * cart for `purchase-complete` event. Required for `add-to-cart` and
+   * `purchase-complete` event types.
+   * </pre>
+   *
+   * <code>.google.protobuf.Int32Value quantity = 2;</code>
+   */
+  com.google.protobuf.Int32ValueOrBuilder getQuantityOrBuilder();
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ProductInlineSource.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ProductInlineSource.java
new file mode 100644
index 00000000..45b05923
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ProductInlineSource.java
@@ -0,0 +1,1038 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/import_config.proto
+
+package com.google.cloud.retail.v2;
+
+/**
+ *
+ *
+ * <pre>
+ * The inline source for the input config for ImportProducts method.
+ * </pre>
+ *
+ * Protobuf type {@code google.cloud.retail.v2.ProductInlineSource}
+ */
+public final class ProductInlineSource extends com.google.protobuf.GeneratedMessageV3
+    implements
+    // @@protoc_insertion_point(message_implements:google.cloud.retail.v2.ProductInlineSource)
+    ProductInlineSourceOrBuilder {
+  private static final long serialVersionUID = 0L;
+  // Use ProductInlineSource.newBuilder() to construct.
+  private ProductInlineSource(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+    super(builder);
+  }
+
+  private ProductInlineSource() {
+    products_ = java.util.Collections.emptyList();
+  }
+
+  @java.lang.Override
+  @SuppressWarnings({"unused"})
+  protected java.lang.Object newInstance(UnusedPrivateParameter unused) {
+    return new ProductInlineSource();
+  }
+
+  @java.lang.Override
+  public final com.google.protobuf.UnknownFieldSet getUnknownFields() {
+    return this.unknownFields;
+  }
+
+  private ProductInlineSource(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    this();
+    if (extensionRegistry == null) {
+      throw new java.lang.NullPointerException();
+    }
+    int mutable_bitField0_ = 0;
+    com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+        com.google.protobuf.UnknownFieldSet.newBuilder();
+    try {
+      boolean done = false;
+      while (!done) {
+        int tag = input.readTag();
+        switch (tag) {
+          case 0:
+            done = true;
+            break;
+          case 10:
+            {
+              if (!((mutable_bitField0_ & 0x00000001) != 0)) {
+                products_ = new java.util.ArrayList<com.google.cloud.retail.v2.Product>();
+                mutable_bitField0_ |= 0x00000001;
+              }
+              products_.add(
+                  input.readMessage(
+                      com.google.cloud.retail.v2.Product.parser(), extensionRegistry));
+              break;
+            }
+          default:
+            {
+              if (!parseUnknownField(input, unknownFields, extensionRegistry, tag)) {
+                done = true;
+              }
+              break;
+            }
+        }
+      }
+    } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+      throw e.setUnfinishedMessage(this);
+    } catch (java.io.IOException e) {
+      throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
+    } finally {
+      if (((mutable_bitField0_ & 0x00000001) != 0)) {
+        products_ = java.util.Collections.unmodifiableList(products_);
+      }
+      this.unknownFields = unknownFields.build();
+      makeExtensionsImmutable();
+    }
+  }
+
+  public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+    return com.google.cloud.retail.v2.ImportConfigProto
+        .internal_static_google_cloud_retail_v2_ProductInlineSource_descriptor;
+  }
+
+  @java.lang.Override
+  protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internalGetFieldAccessorTable() {
+    return com.google.cloud.retail.v2.ImportConfigProto
+        .internal_static_google_cloud_retail_v2_ProductInlineSource_fieldAccessorTable
+        .ensureFieldAccessorsInitialized(
+            com.google.cloud.retail.v2.ProductInlineSource.class,
+            com.google.cloud.retail.v2.ProductInlineSource.Builder.class);
+  }
+
+  public static final int PRODUCTS_FIELD_NUMBER = 1;
+  private java.util.List<com.google.cloud.retail.v2.Product> products_;
+  /**
+   *
+   *
+   * <pre>
+   * Required. A list of products to update/create. Each product must have a
+   * valid [Product.id][google.cloud.retail.v2.Product.id]. Recommended max of
+   * 10k items.
+   * </pre>
+   *
+   * <code>
+   * repeated .google.cloud.retail.v2.Product products = 1 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   */
+  @java.lang.Override
+  public java.util.List<com.google.cloud.retail.v2.Product> getProductsList() {
+    return products_;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Required. A list of products to update/create. Each product must have a
+   * valid [Product.id][google.cloud.retail.v2.Product.id]. Recommended max of
+   * 10k items.
+   * </pre>
+   *
+   * <code>
+   * repeated .google.cloud.retail.v2.Product products = 1 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   */
+  @java.lang.Override
+  public java.util.List<? extends com.google.cloud.retail.v2.ProductOrBuilder>
+      getProductsOrBuilderList() {
+    return products_;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Required. A list of products to update/create. Each product must have a
+   * valid [Product.id][google.cloud.retail.v2.Product.id]. Recommended max of
+   * 10k items.
+   * </pre>
+   *
+   * <code>
+   * repeated .google.cloud.retail.v2.Product products = 1 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   */
+  @java.lang.Override
+  public int getProductsCount() {
+    return products_.size();
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Required. A list of products to update/create. Each product must have a
+   * valid [Product.id][google.cloud.retail.v2.Product.id]. Recommended max of
+   * 10k items.
+   * </pre>
+   *
+   * <code>
+   * repeated .google.cloud.retail.v2.Product products = 1 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.Product getProducts(int index) {
+    return products_.get(index);
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Required. A list of products to update/create. Each product must have a
+   * valid [Product.id][google.cloud.retail.v2.Product.id]. Recommended max of
+   * 10k items.
+   * </pre>
+   *
+   * <code>
+   * repeated .google.cloud.retail.v2.Product products = 1 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.ProductOrBuilder getProductsOrBuilder(int index) {
+    return products_.get(index);
+  }
+
+  private byte memoizedIsInitialized = -1;
+
+  @java.lang.Override
+  public final boolean isInitialized() {
+    byte isInitialized = memoizedIsInitialized;
+    if (isInitialized == 1) return true;
+    if (isInitialized == 0) return false;
+
+    memoizedIsInitialized = 1;
+    return true;
+  }
+
+  @java.lang.Override
+  public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
+    for (int i = 0; i < products_.size(); i++) {
+      output.writeMessage(1, products_.get(i));
+    }
+    unknownFields.writeTo(output);
+  }
+
+  @java.lang.Override
+  public int getSerializedSize() {
+    int size = memoizedSize;
+    if (size != -1) return size;
+
+    size = 0;
+    for (int i = 0; i < products_.size(); i++) {
+      size += com.google.protobuf.CodedOutputStream.computeMessageSize(1, products_.get(i));
+    }
+    size += unknownFields.getSerializedSize();
+    memoizedSize = size;
+    return size;
+  }
+
+  @java.lang.Override
+  public boolean equals(final java.lang.Object obj) {
+    if (obj == this) {
+      return true;
+    }
+    if (!(obj instanceof com.google.cloud.retail.v2.ProductInlineSource)) {
+      return super.equals(obj);
+    }
+    com.google.cloud.retail.v2.ProductInlineSource other =
+        (com.google.cloud.retail.v2.ProductInlineSource) obj;
+
+    if (!getProductsList().equals(other.getProductsList())) return false;
+    if (!unknownFields.equals(other.unknownFields)) return false;
+    return true;
+  }
+
+  @java.lang.Override
+  public int hashCode() {
+    if (memoizedHashCode != 0) {
+      return memoizedHashCode;
+    }
+    int hash = 41;
+    hash = (19 * hash) + getDescriptor().hashCode();
+    if (getProductsCount() > 0) {
+      hash = (37 * hash) + PRODUCTS_FIELD_NUMBER;
+      hash = (53 * hash) + getProductsList().hashCode();
+    }
+    hash = (29 * hash) + unknownFields.hashCode();
+    memoizedHashCode = hash;
+    return hash;
+  }
+
+  public static com.google.cloud.retail.v2.ProductInlineSource parseFrom(java.nio.ByteBuffer data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.ProductInlineSource parseFrom(
+      java.nio.ByteBuffer data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.ProductInlineSource parseFrom(
+      com.google.protobuf.ByteString data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.ProductInlineSource parseFrom(
+      com.google.protobuf.ByteString data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.ProductInlineSource parseFrom(byte[] data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.ProductInlineSource parseFrom(
+      byte[] data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.ProductInlineSource parseFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.ProductInlineSource parseFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.ProductInlineSource parseDelimitedFrom(
+      java.io.InputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.ProductInlineSource parseDelimitedFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.ProductInlineSource parseFrom(
+      com.google.protobuf.CodedInputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.ProductInlineSource parseFrom(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  @java.lang.Override
+  public Builder newBuilderForType() {
+    return newBuilder();
+  }
+
+  public static Builder newBuilder() {
+    return DEFAULT_INSTANCE.toBuilder();
+  }
+
+  public static Builder newBuilder(com.google.cloud.retail.v2.ProductInlineSource prototype) {
+    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+  }
+
+  @java.lang.Override
+  public Builder toBuilder() {
+    return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
+  }
+
+  @java.lang.Override
+  protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+    Builder builder = new Builder(parent);
+    return builder;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * The inline source for the input config for ImportProducts method.
+   * </pre>
+   *
+   * Protobuf type {@code google.cloud.retail.v2.ProductInlineSource}
+   */
+  public static final class Builder extends com.google.protobuf.GeneratedMessageV3.Builder<Builder>
+      implements
+      // @@protoc_insertion_point(builder_implements:google.cloud.retail.v2.ProductInlineSource)
+      com.google.cloud.retail.v2.ProductInlineSourceOrBuilder {
+    public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+      return com.google.cloud.retail.v2.ImportConfigProto
+          .internal_static_google_cloud_retail_v2_ProductInlineSource_descriptor;
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return com.google.cloud.retail.v2.ImportConfigProto
+          .internal_static_google_cloud_retail_v2_ProductInlineSource_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              com.google.cloud.retail.v2.ProductInlineSource.class,
+              com.google.cloud.retail.v2.ProductInlineSource.Builder.class);
+    }
+
+    // Construct using com.google.cloud.retail.v2.ProductInlineSource.newBuilder()
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
+
+    private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+      super(parent);
+      maybeForceBuilderInitialization();
+    }
+
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders) {
+        getProductsFieldBuilder();
+      }
+    }
+
+    @java.lang.Override
+    public Builder clear() {
+      super.clear();
+      if (productsBuilder_ == null) {
+        products_ = java.util.Collections.emptyList();
+        bitField0_ = (bitField0_ & ~0x00000001);
+      } else {
+        productsBuilder_.clear();
+      }
+      return this;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
+      return com.google.cloud.retail.v2.ImportConfigProto
+          .internal_static_google_cloud_retail_v2_ProductInlineSource_descriptor;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.ProductInlineSource getDefaultInstanceForType() {
+      return com.google.cloud.retail.v2.ProductInlineSource.getDefaultInstance();
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.ProductInlineSource build() {
+      com.google.cloud.retail.v2.ProductInlineSource result = buildPartial();
+      if (!result.isInitialized()) {
+        throw newUninitializedMessageException(result);
+      }
+      return result;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.ProductInlineSource buildPartial() {
+      com.google.cloud.retail.v2.ProductInlineSource result =
+          new com.google.cloud.retail.v2.ProductInlineSource(this);
+      int from_bitField0_ = bitField0_;
+      if (productsBuilder_ == null) {
+        if (((bitField0_ & 0x00000001) != 0)) {
+          products_ = java.util.Collections.unmodifiableList(products_);
+          bitField0_ = (bitField0_ & ~0x00000001);
+        }
+        result.products_ = products_;
+      } else {
+        result.products_ = productsBuilder_.build();
+      }
+      onBuilt();
+      return result;
+    }
+
+    @java.lang.Override
+    public Builder clone() {
+      return super.clone();
+    }
+
+    @java.lang.Override
+    public Builder setField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.setField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
+      return super.clearField(field);
+    }
+
+    @java.lang.Override
+    public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+      return super.clearOneof(oneof);
+    }
+
+    @java.lang.Override
+    public Builder setRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, int index, java.lang.Object value) {
+      return super.setRepeatedField(field, index, value);
+    }
+
+    @java.lang.Override
+    public Builder addRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.addRepeatedField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(com.google.protobuf.Message other) {
+      if (other instanceof com.google.cloud.retail.v2.ProductInlineSource) {
+        return mergeFrom((com.google.cloud.retail.v2.ProductInlineSource) other);
+      } else {
+        super.mergeFrom(other);
+        return this;
+      }
+    }
+
+    public Builder mergeFrom(com.google.cloud.retail.v2.ProductInlineSource other) {
+      if (other == com.google.cloud.retail.v2.ProductInlineSource.getDefaultInstance()) return this;
+      if (productsBuilder_ == null) {
+        if (!other.products_.isEmpty()) {
+          if (products_.isEmpty()) {
+            products_ = other.products_;
+            bitField0_ = (bitField0_ & ~0x00000001);
+          } else {
+            ensureProductsIsMutable();
+            products_.addAll(other.products_);
+          }
+          onChanged();
+        }
+      } else {
+        if (!other.products_.isEmpty()) {
+          if (productsBuilder_.isEmpty()) {
+            productsBuilder_.dispose();
+            productsBuilder_ = null;
+            products_ = other.products_;
+            bitField0_ = (bitField0_ & ~0x00000001);
+            productsBuilder_ =
+                com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders
+                    ? getProductsFieldBuilder()
+                    : null;
+          } else {
+            productsBuilder_.addAllMessages(other.products_);
+          }
+        }
+      }
+      this.mergeUnknownFields(other.unknownFields);
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final boolean isInitialized() {
+      return true;
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      com.google.cloud.retail.v2.ProductInlineSource parsedMessage = null;
+      try {
+        parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        parsedMessage = (com.google.cloud.retail.v2.ProductInlineSource) e.getUnfinishedMessage();
+        throw e.unwrapIOException();
+      } finally {
+        if (parsedMessage != null) {
+          mergeFrom(parsedMessage);
+        }
+      }
+      return this;
+    }
+
+    private int bitField0_;
+
+    private java.util.List<com.google.cloud.retail.v2.Product> products_ =
+        java.util.Collections.emptyList();
+
+    private void ensureProductsIsMutable() {
+      if (!((bitField0_ & 0x00000001) != 0)) {
+        products_ = new java.util.ArrayList<com.google.cloud.retail.v2.Product>(products_);
+        bitField0_ |= 0x00000001;
+      }
+    }
+
+    private com.google.protobuf.RepeatedFieldBuilderV3<
+            com.google.cloud.retail.v2.Product,
+            com.google.cloud.retail.v2.Product.Builder,
+            com.google.cloud.retail.v2.ProductOrBuilder>
+        productsBuilder_;
+
+    /**
+     *
+     *
+     * <pre>
+     * Required. A list of products to update/create. Each product must have a
+     * valid [Product.id][google.cloud.retail.v2.Product.id]. Recommended max of
+     * 10k items.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.cloud.retail.v2.Product products = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public java.util.List<com.google.cloud.retail.v2.Product> getProductsList() {
+      if (productsBuilder_ == null) {
+        return java.util.Collections.unmodifiableList(products_);
+      } else {
+        return productsBuilder_.getMessageList();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. A list of products to update/create. Each product must have a
+     * valid [Product.id][google.cloud.retail.v2.Product.id]. Recommended max of
+     * 10k items.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.cloud.retail.v2.Product products = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public int getProductsCount() {
+      if (productsBuilder_ == null) {
+        return products_.size();
+      } else {
+        return productsBuilder_.getCount();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. A list of products to update/create. Each product must have a
+     * valid [Product.id][google.cloud.retail.v2.Product.id]. Recommended max of
+     * 10k items.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.cloud.retail.v2.Product products = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public com.google.cloud.retail.v2.Product getProducts(int index) {
+      if (productsBuilder_ == null) {
+        return products_.get(index);
+      } else {
+        return productsBuilder_.getMessage(index);
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. A list of products to update/create. Each product must have a
+     * valid [Product.id][google.cloud.retail.v2.Product.id]. Recommended max of
+     * 10k items.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.cloud.retail.v2.Product products = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder setProducts(int index, com.google.cloud.retail.v2.Product value) {
+      if (productsBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        ensureProductsIsMutable();
+        products_.set(index, value);
+        onChanged();
+      } else {
+        productsBuilder_.setMessage(index, value);
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. A list of products to update/create. Each product must have a
+     * valid [Product.id][google.cloud.retail.v2.Product.id]. Recommended max of
+     * 10k items.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.cloud.retail.v2.Product products = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder setProducts(
+        int index, com.google.cloud.retail.v2.Product.Builder builderForValue) {
+      if (productsBuilder_ == null) {
+        ensureProductsIsMutable();
+        products_.set(index, builderForValue.build());
+        onChanged();
+      } else {
+        productsBuilder_.setMessage(index, builderForValue.build());
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. A list of products to update/create. Each product must have a
+     * valid [Product.id][google.cloud.retail.v2.Product.id]. Recommended max of
+     * 10k items.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.cloud.retail.v2.Product products = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder addProducts(com.google.cloud.retail.v2.Product value) {
+      if (productsBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        ensureProductsIsMutable();
+        products_.add(value);
+        onChanged();
+      } else {
+        productsBuilder_.addMessage(value);
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. A list of products to update/create. Each product must have a
+     * valid [Product.id][google.cloud.retail.v2.Product.id]. Recommended max of
+     * 10k items.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.cloud.retail.v2.Product products = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder addProducts(int index, com.google.cloud.retail.v2.Product value) {
+      if (productsBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        ensureProductsIsMutable();
+        products_.add(index, value);
+        onChanged();
+      } else {
+        productsBuilder_.addMessage(index, value);
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. A list of products to update/create. Each product must have a
+     * valid [Product.id][google.cloud.retail.v2.Product.id]. Recommended max of
+     * 10k items.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.cloud.retail.v2.Product products = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder addProducts(com.google.cloud.retail.v2.Product.Builder builderForValue) {
+      if (productsBuilder_ == null) {
+        ensureProductsIsMutable();
+        products_.add(builderForValue.build());
+        onChanged();
+      } else {
+        productsBuilder_.addMessage(builderForValue.build());
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. A list of products to update/create. Each product must have a
+     * valid [Product.id][google.cloud.retail.v2.Product.id]. Recommended max of
+     * 10k items.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.cloud.retail.v2.Product products = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder addProducts(
+        int index, com.google.cloud.retail.v2.Product.Builder builderForValue) {
+      if (productsBuilder_ == null) {
+        ensureProductsIsMutable();
+        products_.add(index, builderForValue.build());
+        onChanged();
+      } else {
+        productsBuilder_.addMessage(index, builderForValue.build());
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. A list of products to update/create. Each product must have a
+     * valid [Product.id][google.cloud.retail.v2.Product.id]. Recommended max of
+     * 10k items.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.cloud.retail.v2.Product products = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder addAllProducts(
+        java.lang.Iterable<? extends com.google.cloud.retail.v2.Product> values) {
+      if (productsBuilder_ == null) {
+        ensureProductsIsMutable();
+        com.google.protobuf.AbstractMessageLite.Builder.addAll(values, products_);
+        onChanged();
+      } else {
+        productsBuilder_.addAllMessages(values);
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. A list of products to update/create. Each product must have a
+     * valid [Product.id][google.cloud.retail.v2.Product.id]. Recommended max of
+     * 10k items.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.cloud.retail.v2.Product products = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder clearProducts() {
+      if (productsBuilder_ == null) {
+        products_ = java.util.Collections.emptyList();
+        bitField0_ = (bitField0_ & ~0x00000001);
+        onChanged();
+      } else {
+        productsBuilder_.clear();
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. A list of products to update/create. Each product must have a
+     * valid [Product.id][google.cloud.retail.v2.Product.id]. Recommended max of
+     * 10k items.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.cloud.retail.v2.Product products = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder removeProducts(int index) {
+      if (productsBuilder_ == null) {
+        ensureProductsIsMutable();
+        products_.remove(index);
+        onChanged();
+      } else {
+        productsBuilder_.remove(index);
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. A list of products to update/create. Each product must have a
+     * valid [Product.id][google.cloud.retail.v2.Product.id]. Recommended max of
+     * 10k items.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.cloud.retail.v2.Product products = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public com.google.cloud.retail.v2.Product.Builder getProductsBuilder(int index) {
+      return getProductsFieldBuilder().getBuilder(index);
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. A list of products to update/create. Each product must have a
+     * valid [Product.id][google.cloud.retail.v2.Product.id]. Recommended max of
+     * 10k items.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.cloud.retail.v2.Product products = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public com.google.cloud.retail.v2.ProductOrBuilder getProductsOrBuilder(int index) {
+      if (productsBuilder_ == null) {
+        return products_.get(index);
+      } else {
+        return productsBuilder_.getMessageOrBuilder(index);
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. A list of products to update/create. Each product must have a
+     * valid [Product.id][google.cloud.retail.v2.Product.id]. Recommended max of
+     * 10k items.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.cloud.retail.v2.Product products = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public java.util.List<? extends com.google.cloud.retail.v2.ProductOrBuilder>
+        getProductsOrBuilderList() {
+      if (productsBuilder_ != null) {
+        return productsBuilder_.getMessageOrBuilderList();
+      } else {
+        return java.util.Collections.unmodifiableList(products_);
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. A list of products to update/create. Each product must have a
+     * valid [Product.id][google.cloud.retail.v2.Product.id]. Recommended max of
+     * 10k items.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.cloud.retail.v2.Product products = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public com.google.cloud.retail.v2.Product.Builder addProductsBuilder() {
+      return getProductsFieldBuilder()
+          .addBuilder(com.google.cloud.retail.v2.Product.getDefaultInstance());
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. A list of products to update/create. Each product must have a
+     * valid [Product.id][google.cloud.retail.v2.Product.id]. Recommended max of
+     * 10k items.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.cloud.retail.v2.Product products = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public com.google.cloud.retail.v2.Product.Builder addProductsBuilder(int index) {
+      return getProductsFieldBuilder()
+          .addBuilder(index, com.google.cloud.retail.v2.Product.getDefaultInstance());
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. A list of products to update/create. Each product must have a
+     * valid [Product.id][google.cloud.retail.v2.Product.id]. Recommended max of
+     * 10k items.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.cloud.retail.v2.Product products = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public java.util.List<com.google.cloud.retail.v2.Product.Builder> getProductsBuilderList() {
+      return getProductsFieldBuilder().getBuilderList();
+    }
+
+    private com.google.protobuf.RepeatedFieldBuilderV3<
+            com.google.cloud.retail.v2.Product,
+            com.google.cloud.retail.v2.Product.Builder,
+            com.google.cloud.retail.v2.ProductOrBuilder>
+        getProductsFieldBuilder() {
+      if (productsBuilder_ == null) {
+        productsBuilder_ =
+            new com.google.protobuf.RepeatedFieldBuilderV3<
+                com.google.cloud.retail.v2.Product,
+                com.google.cloud.retail.v2.Product.Builder,
+                com.google.cloud.retail.v2.ProductOrBuilder>(
+                products_, ((bitField0_ & 0x00000001) != 0), getParentForChildren(), isClean());
+        products_ = null;
+      }
+      return productsBuilder_;
+    }
+
+    @java.lang.Override
+    public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.setUnknownFields(unknownFields);
+    }
+
+    @java.lang.Override
+    public final Builder mergeUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.mergeUnknownFields(unknownFields);
+    }
+
+    // @@protoc_insertion_point(builder_scope:google.cloud.retail.v2.ProductInlineSource)
+  }
+
+  // @@protoc_insertion_point(class_scope:google.cloud.retail.v2.ProductInlineSource)
+  private static final com.google.cloud.retail.v2.ProductInlineSource DEFAULT_INSTANCE;
+
+  static {
+    DEFAULT_INSTANCE = new com.google.cloud.retail.v2.ProductInlineSource();
+  }
+
+  public static com.google.cloud.retail.v2.ProductInlineSource getDefaultInstance() {
+    return DEFAULT_INSTANCE;
+  }
+
+  private static final com.google.protobuf.Parser<ProductInlineSource> PARSER =
+      new com.google.protobuf.AbstractParser<ProductInlineSource>() {
+        @java.lang.Override
+        public ProductInlineSource parsePartialFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws com.google.protobuf.InvalidProtocolBufferException {
+          return new ProductInlineSource(input, extensionRegistry);
+        }
+      };
+
+  public static com.google.protobuf.Parser<ProductInlineSource> parser() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.protobuf.Parser<ProductInlineSource> getParserForType() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.cloud.retail.v2.ProductInlineSource getDefaultInstanceForType() {
+    return DEFAULT_INSTANCE;
+  }
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ProductInlineSourceOrBuilder.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ProductInlineSourceOrBuilder.java
new file mode 100644
index 00000000..b9c62cb2
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ProductInlineSourceOrBuilder.java
@@ -0,0 +1,96 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/import_config.proto
+
+package com.google.cloud.retail.v2;
+
+public interface ProductInlineSourceOrBuilder
+    extends
+    // @@protoc_insertion_point(interface_extends:google.cloud.retail.v2.ProductInlineSource)
+    com.google.protobuf.MessageOrBuilder {
+
+  /**
+   *
+   *
+   * <pre>
+   * Required. A list of products to update/create. Each product must have a
+   * valid [Product.id][google.cloud.retail.v2.Product.id]. Recommended max of
+   * 10k items.
+   * </pre>
+   *
+   * <code>
+   * repeated .google.cloud.retail.v2.Product products = 1 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   */
+  java.util.List<com.google.cloud.retail.v2.Product> getProductsList();
+  /**
+   *
+   *
+   * <pre>
+   * Required. A list of products to update/create. Each product must have a
+   * valid [Product.id][google.cloud.retail.v2.Product.id]. Recommended max of
+   * 10k items.
+   * </pre>
+   *
+   * <code>
+   * repeated .google.cloud.retail.v2.Product products = 1 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   */
+  com.google.cloud.retail.v2.Product getProducts(int index);
+  /**
+   *
+   *
+   * <pre>
+   * Required. A list of products to update/create. Each product must have a
+   * valid [Product.id][google.cloud.retail.v2.Product.id]. Recommended max of
+   * 10k items.
+   * </pre>
+   *
+   * <code>
+   * repeated .google.cloud.retail.v2.Product products = 1 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   */
+  int getProductsCount();
+  /**
+   *
+   *
+   * <pre>
+   * Required. A list of products to update/create. Each product must have a
+   * valid [Product.id][google.cloud.retail.v2.Product.id]. Recommended max of
+   * 10k items.
+   * </pre>
+   *
+   * <code>
+   * repeated .google.cloud.retail.v2.Product products = 1 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   */
+  java.util.List<? extends com.google.cloud.retail.v2.ProductOrBuilder> getProductsOrBuilderList();
+  /**
+   *
+   *
+   * <pre>
+   * Required. A list of products to update/create. Each product must have a
+   * valid [Product.id][google.cloud.retail.v2.Product.id]. Recommended max of
+   * 10k items.
+   * </pre>
+   *
+   * <code>
+   * repeated .google.cloud.retail.v2.Product products = 1 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   */
+  com.google.cloud.retail.v2.ProductOrBuilder getProductsOrBuilder(int index);
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ProductInputConfig.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ProductInputConfig.java
new file mode 100644
index 00000000..dc6040fc
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ProductInputConfig.java
@@ -0,0 +1,1443 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/import_config.proto
+
+package com.google.cloud.retail.v2;
+
+/**
+ *
+ *
+ * <pre>
+ * The input config source for products.
+ * </pre>
+ *
+ * Protobuf type {@code google.cloud.retail.v2.ProductInputConfig}
+ */
+public final class ProductInputConfig extends com.google.protobuf.GeneratedMessageV3
+    implements
+    // @@protoc_insertion_point(message_implements:google.cloud.retail.v2.ProductInputConfig)
+    ProductInputConfigOrBuilder {
+  private static final long serialVersionUID = 0L;
+  // Use ProductInputConfig.newBuilder() to construct.
+  private ProductInputConfig(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+    super(builder);
+  }
+
+  private ProductInputConfig() {}
+
+  @java.lang.Override
+  @SuppressWarnings({"unused"})
+  protected java.lang.Object newInstance(UnusedPrivateParameter unused) {
+    return new ProductInputConfig();
+  }
+
+  @java.lang.Override
+  public final com.google.protobuf.UnknownFieldSet getUnknownFields() {
+    return this.unknownFields;
+  }
+
+  private ProductInputConfig(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    this();
+    if (extensionRegistry == null) {
+      throw new java.lang.NullPointerException();
+    }
+    com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+        com.google.protobuf.UnknownFieldSet.newBuilder();
+    try {
+      boolean done = false;
+      while (!done) {
+        int tag = input.readTag();
+        switch (tag) {
+          case 0:
+            done = true;
+            break;
+          case 10:
+            {
+              com.google.cloud.retail.v2.ProductInlineSource.Builder subBuilder = null;
+              if (sourceCase_ == 1) {
+                subBuilder = ((com.google.cloud.retail.v2.ProductInlineSource) source_).toBuilder();
+              }
+              source_ =
+                  input.readMessage(
+                      com.google.cloud.retail.v2.ProductInlineSource.parser(), extensionRegistry);
+              if (subBuilder != null) {
+                subBuilder.mergeFrom((com.google.cloud.retail.v2.ProductInlineSource) source_);
+                source_ = subBuilder.buildPartial();
+              }
+              sourceCase_ = 1;
+              break;
+            }
+          case 18:
+            {
+              com.google.cloud.retail.v2.GcsSource.Builder subBuilder = null;
+              if (sourceCase_ == 2) {
+                subBuilder = ((com.google.cloud.retail.v2.GcsSource) source_).toBuilder();
+              }
+              source_ =
+                  input.readMessage(
+                      com.google.cloud.retail.v2.GcsSource.parser(), extensionRegistry);
+              if (subBuilder != null) {
+                subBuilder.mergeFrom((com.google.cloud.retail.v2.GcsSource) source_);
+                source_ = subBuilder.buildPartial();
+              }
+              sourceCase_ = 2;
+              break;
+            }
+          case 26:
+            {
+              com.google.cloud.retail.v2.BigQuerySource.Builder subBuilder = null;
+              if (sourceCase_ == 3) {
+                subBuilder = ((com.google.cloud.retail.v2.BigQuerySource) source_).toBuilder();
+              }
+              source_ =
+                  input.readMessage(
+                      com.google.cloud.retail.v2.BigQuerySource.parser(), extensionRegistry);
+              if (subBuilder != null) {
+                subBuilder.mergeFrom((com.google.cloud.retail.v2.BigQuerySource) source_);
+                source_ = subBuilder.buildPartial();
+              }
+              sourceCase_ = 3;
+              break;
+            }
+          default:
+            {
+              if (!parseUnknownField(input, unknownFields, extensionRegistry, tag)) {
+                done = true;
+              }
+              break;
+            }
+        }
+      }
+    } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+      throw e.setUnfinishedMessage(this);
+    } catch (java.io.IOException e) {
+      throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
+    } finally {
+      this.unknownFields = unknownFields.build();
+      makeExtensionsImmutable();
+    }
+  }
+
+  public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+    return com.google.cloud.retail.v2.ImportConfigProto
+        .internal_static_google_cloud_retail_v2_ProductInputConfig_descriptor;
+  }
+
+  @java.lang.Override
+  protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internalGetFieldAccessorTable() {
+    return com.google.cloud.retail.v2.ImportConfigProto
+        .internal_static_google_cloud_retail_v2_ProductInputConfig_fieldAccessorTable
+        .ensureFieldAccessorsInitialized(
+            com.google.cloud.retail.v2.ProductInputConfig.class,
+            com.google.cloud.retail.v2.ProductInputConfig.Builder.class);
+  }
+
+  private int sourceCase_ = 0;
+  private java.lang.Object source_;
+
+  public enum SourceCase
+      implements
+          com.google.protobuf.Internal.EnumLite,
+          com.google.protobuf.AbstractMessage.InternalOneOfEnum {
+    PRODUCT_INLINE_SOURCE(1),
+    GCS_SOURCE(2),
+    BIG_QUERY_SOURCE(3),
+    SOURCE_NOT_SET(0);
+    private final int value;
+
+    private SourceCase(int value) {
+      this.value = value;
+    }
+    /**
+     * @param value The number of the enum to look for.
+     * @return The enum associated with the given number.
+     * @deprecated Use {@link #forNumber(int)} instead.
+     */
+    @java.lang.Deprecated
+    public static SourceCase valueOf(int value) {
+      return forNumber(value);
+    }
+
+    public static SourceCase forNumber(int value) {
+      switch (value) {
+        case 1:
+          return PRODUCT_INLINE_SOURCE;
+        case 2:
+          return GCS_SOURCE;
+        case 3:
+          return BIG_QUERY_SOURCE;
+        case 0:
+          return SOURCE_NOT_SET;
+        default:
+          return null;
+      }
+    }
+
+    public int getNumber() {
+      return this.value;
+    }
+  };
+
+  public SourceCase getSourceCase() {
+    return SourceCase.forNumber(sourceCase_);
+  }
+
+  public static final int PRODUCT_INLINE_SOURCE_FIELD_NUMBER = 1;
+  /**
+   *
+   *
+   * <pre>
+   * The Inline source for the input content for products.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.ProductInlineSource product_inline_source = 1;</code>
+   *
+   * @return Whether the productInlineSource field is set.
+   */
+  @java.lang.Override
+  public boolean hasProductInlineSource() {
+    return sourceCase_ == 1;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * The Inline source for the input content for products.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.ProductInlineSource product_inline_source = 1;</code>
+   *
+   * @return The productInlineSource.
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.ProductInlineSource getProductInlineSource() {
+    if (sourceCase_ == 1) {
+      return (com.google.cloud.retail.v2.ProductInlineSource) source_;
+    }
+    return com.google.cloud.retail.v2.ProductInlineSource.getDefaultInstance();
+  }
+  /**
+   *
+   *
+   * <pre>
+   * The Inline source for the input content for products.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.ProductInlineSource product_inline_source = 1;</code>
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.ProductInlineSourceOrBuilder getProductInlineSourceOrBuilder() {
+    if (sourceCase_ == 1) {
+      return (com.google.cloud.retail.v2.ProductInlineSource) source_;
+    }
+    return com.google.cloud.retail.v2.ProductInlineSource.getDefaultInstance();
+  }
+
+  public static final int GCS_SOURCE_FIELD_NUMBER = 2;
+  /**
+   *
+   *
+   * <pre>
+   * Google Cloud Storage location for the input content.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.GcsSource gcs_source = 2;</code>
+   *
+   * @return Whether the gcsSource field is set.
+   */
+  @java.lang.Override
+  public boolean hasGcsSource() {
+    return sourceCase_ == 2;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Google Cloud Storage location for the input content.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.GcsSource gcs_source = 2;</code>
+   *
+   * @return The gcsSource.
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.GcsSource getGcsSource() {
+    if (sourceCase_ == 2) {
+      return (com.google.cloud.retail.v2.GcsSource) source_;
+    }
+    return com.google.cloud.retail.v2.GcsSource.getDefaultInstance();
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Google Cloud Storage location for the input content.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.GcsSource gcs_source = 2;</code>
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.GcsSourceOrBuilder getGcsSourceOrBuilder() {
+    if (sourceCase_ == 2) {
+      return (com.google.cloud.retail.v2.GcsSource) source_;
+    }
+    return com.google.cloud.retail.v2.GcsSource.getDefaultInstance();
+  }
+
+  public static final int BIG_QUERY_SOURCE_FIELD_NUMBER = 3;
+  /**
+   *
+   *
+   * <pre>
+   * BigQuery input source.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.BigQuerySource big_query_source = 3;</code>
+   *
+   * @return Whether the bigQuerySource field is set.
+   */
+  @java.lang.Override
+  public boolean hasBigQuerySource() {
+    return sourceCase_ == 3;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * BigQuery input source.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.BigQuerySource big_query_source = 3;</code>
+   *
+   * @return The bigQuerySource.
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.BigQuerySource getBigQuerySource() {
+    if (sourceCase_ == 3) {
+      return (com.google.cloud.retail.v2.BigQuerySource) source_;
+    }
+    return com.google.cloud.retail.v2.BigQuerySource.getDefaultInstance();
+  }
+  /**
+   *
+   *
+   * <pre>
+   * BigQuery input source.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.BigQuerySource big_query_source = 3;</code>
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.BigQuerySourceOrBuilder getBigQuerySourceOrBuilder() {
+    if (sourceCase_ == 3) {
+      return (com.google.cloud.retail.v2.BigQuerySource) source_;
+    }
+    return com.google.cloud.retail.v2.BigQuerySource.getDefaultInstance();
+  }
+
+  private byte memoizedIsInitialized = -1;
+
+  @java.lang.Override
+  public final boolean isInitialized() {
+    byte isInitialized = memoizedIsInitialized;
+    if (isInitialized == 1) return true;
+    if (isInitialized == 0) return false;
+
+    memoizedIsInitialized = 1;
+    return true;
+  }
+
+  @java.lang.Override
+  public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
+    if (sourceCase_ == 1) {
+      output.writeMessage(1, (com.google.cloud.retail.v2.ProductInlineSource) source_);
+    }
+    if (sourceCase_ == 2) {
+      output.writeMessage(2, (com.google.cloud.retail.v2.GcsSource) source_);
+    }
+    if (sourceCase_ == 3) {
+      output.writeMessage(3, (com.google.cloud.retail.v2.BigQuerySource) source_);
+    }
+    unknownFields.writeTo(output);
+  }
+
+  @java.lang.Override
+  public int getSerializedSize() {
+    int size = memoizedSize;
+    if (size != -1) return size;
+
+    size = 0;
+    if (sourceCase_ == 1) {
+      size +=
+          com.google.protobuf.CodedOutputStream.computeMessageSize(
+              1, (com.google.cloud.retail.v2.ProductInlineSource) source_);
+    }
+    if (sourceCase_ == 2) {
+      size +=
+          com.google.protobuf.CodedOutputStream.computeMessageSize(
+              2, (com.google.cloud.retail.v2.GcsSource) source_);
+    }
+    if (sourceCase_ == 3) {
+      size +=
+          com.google.protobuf.CodedOutputStream.computeMessageSize(
+              3, (com.google.cloud.retail.v2.BigQuerySource) source_);
+    }
+    size += unknownFields.getSerializedSize();
+    memoizedSize = size;
+    return size;
+  }
+
+  @java.lang.Override
+  public boolean equals(final java.lang.Object obj) {
+    if (obj == this) {
+      return true;
+    }
+    if (!(obj instanceof com.google.cloud.retail.v2.ProductInputConfig)) {
+      return super.equals(obj);
+    }
+    com.google.cloud.retail.v2.ProductInputConfig other =
+        (com.google.cloud.retail.v2.ProductInputConfig) obj;
+
+    if (!getSourceCase().equals(other.getSourceCase())) return false;
+    switch (sourceCase_) {
+      case 1:
+        if (!getProductInlineSource().equals(other.getProductInlineSource())) return false;
+        break;
+      case 2:
+        if (!getGcsSource().equals(other.getGcsSource())) return false;
+        break;
+      case 3:
+        if (!getBigQuerySource().equals(other.getBigQuerySource())) return false;
+        break;
+      case 0:
+      default:
+    }
+    if (!unknownFields.equals(other.unknownFields)) return false;
+    return true;
+  }
+
+  @java.lang.Override
+  public int hashCode() {
+    if (memoizedHashCode != 0) {
+      return memoizedHashCode;
+    }
+    int hash = 41;
+    hash = (19 * hash) + getDescriptor().hashCode();
+    switch (sourceCase_) {
+      case 1:
+        hash = (37 * hash) + PRODUCT_INLINE_SOURCE_FIELD_NUMBER;
+        hash = (53 * hash) + getProductInlineSource().hashCode();
+        break;
+      case 2:
+        hash = (37 * hash) + GCS_SOURCE_FIELD_NUMBER;
+        hash = (53 * hash) + getGcsSource().hashCode();
+        break;
+      case 3:
+        hash = (37 * hash) + BIG_QUERY_SOURCE_FIELD_NUMBER;
+        hash = (53 * hash) + getBigQuerySource().hashCode();
+        break;
+      case 0:
+      default:
+    }
+    hash = (29 * hash) + unknownFields.hashCode();
+    memoizedHashCode = hash;
+    return hash;
+  }
+
+  public static com.google.cloud.retail.v2.ProductInputConfig parseFrom(java.nio.ByteBuffer data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.ProductInputConfig parseFrom(
+      java.nio.ByteBuffer data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.ProductInputConfig parseFrom(
+      com.google.protobuf.ByteString data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.ProductInputConfig parseFrom(
+      com.google.protobuf.ByteString data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.ProductInputConfig parseFrom(byte[] data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.ProductInputConfig parseFrom(
+      byte[] data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.ProductInputConfig parseFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.ProductInputConfig parseFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.ProductInputConfig parseDelimitedFrom(
+      java.io.InputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.ProductInputConfig parseDelimitedFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.ProductInputConfig parseFrom(
+      com.google.protobuf.CodedInputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.ProductInputConfig parseFrom(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  @java.lang.Override
+  public Builder newBuilderForType() {
+    return newBuilder();
+  }
+
+  public static Builder newBuilder() {
+    return DEFAULT_INSTANCE.toBuilder();
+  }
+
+  public static Builder newBuilder(com.google.cloud.retail.v2.ProductInputConfig prototype) {
+    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+  }
+
+  @java.lang.Override
+  public Builder toBuilder() {
+    return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
+  }
+
+  @java.lang.Override
+  protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+    Builder builder = new Builder(parent);
+    return builder;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * The input config source for products.
+   * </pre>
+   *
+   * Protobuf type {@code google.cloud.retail.v2.ProductInputConfig}
+   */
+  public static final class Builder extends com.google.protobuf.GeneratedMessageV3.Builder<Builder>
+      implements
+      // @@protoc_insertion_point(builder_implements:google.cloud.retail.v2.ProductInputConfig)
+      com.google.cloud.retail.v2.ProductInputConfigOrBuilder {
+    public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+      return com.google.cloud.retail.v2.ImportConfigProto
+          .internal_static_google_cloud_retail_v2_ProductInputConfig_descriptor;
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return com.google.cloud.retail.v2.ImportConfigProto
+          .internal_static_google_cloud_retail_v2_ProductInputConfig_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              com.google.cloud.retail.v2.ProductInputConfig.class,
+              com.google.cloud.retail.v2.ProductInputConfig.Builder.class);
+    }
+
+    // Construct using com.google.cloud.retail.v2.ProductInputConfig.newBuilder()
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
+
+    private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+      super(parent);
+      maybeForceBuilderInitialization();
+    }
+
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders) {}
+    }
+
+    @java.lang.Override
+    public Builder clear() {
+      super.clear();
+      sourceCase_ = 0;
+      source_ = null;
+      return this;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
+      return com.google.cloud.retail.v2.ImportConfigProto
+          .internal_static_google_cloud_retail_v2_ProductInputConfig_descriptor;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.ProductInputConfig getDefaultInstanceForType() {
+      return com.google.cloud.retail.v2.ProductInputConfig.getDefaultInstance();
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.ProductInputConfig build() {
+      com.google.cloud.retail.v2.ProductInputConfig result = buildPartial();
+      if (!result.isInitialized()) {
+        throw newUninitializedMessageException(result);
+      }
+      return result;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.ProductInputConfig buildPartial() {
+      com.google.cloud.retail.v2.ProductInputConfig result =
+          new com.google.cloud.retail.v2.ProductInputConfig(this);
+      if (sourceCase_ == 1) {
+        if (productInlineSourceBuilder_ == null) {
+          result.source_ = source_;
+        } else {
+          result.source_ = productInlineSourceBuilder_.build();
+        }
+      }
+      if (sourceCase_ == 2) {
+        if (gcsSourceBuilder_ == null) {
+          result.source_ = source_;
+        } else {
+          result.source_ = gcsSourceBuilder_.build();
+        }
+      }
+      if (sourceCase_ == 3) {
+        if (bigQuerySourceBuilder_ == null) {
+          result.source_ = source_;
+        } else {
+          result.source_ = bigQuerySourceBuilder_.build();
+        }
+      }
+      result.sourceCase_ = sourceCase_;
+      onBuilt();
+      return result;
+    }
+
+    @java.lang.Override
+    public Builder clone() {
+      return super.clone();
+    }
+
+    @java.lang.Override
+    public Builder setField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.setField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
+      return super.clearField(field);
+    }
+
+    @java.lang.Override
+    public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+      return super.clearOneof(oneof);
+    }
+
+    @java.lang.Override
+    public Builder setRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, int index, java.lang.Object value) {
+      return super.setRepeatedField(field, index, value);
+    }
+
+    @java.lang.Override
+    public Builder addRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.addRepeatedField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(com.google.protobuf.Message other) {
+      if (other instanceof com.google.cloud.retail.v2.ProductInputConfig) {
+        return mergeFrom((com.google.cloud.retail.v2.ProductInputConfig) other);
+      } else {
+        super.mergeFrom(other);
+        return this;
+      }
+    }
+
+    public Builder mergeFrom(com.google.cloud.retail.v2.ProductInputConfig other) {
+      if (other == com.google.cloud.retail.v2.ProductInputConfig.getDefaultInstance()) return this;
+      switch (other.getSourceCase()) {
+        case PRODUCT_INLINE_SOURCE:
+          {
+            mergeProductInlineSource(other.getProductInlineSource());
+            break;
+          }
+        case GCS_SOURCE:
+          {
+            mergeGcsSource(other.getGcsSource());
+            break;
+          }
+        case BIG_QUERY_SOURCE:
+          {
+            mergeBigQuerySource(other.getBigQuerySource());
+            break;
+          }
+        case SOURCE_NOT_SET:
+          {
+            break;
+          }
+      }
+      this.mergeUnknownFields(other.unknownFields);
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final boolean isInitialized() {
+      return true;
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      com.google.cloud.retail.v2.ProductInputConfig parsedMessage = null;
+      try {
+        parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        parsedMessage = (com.google.cloud.retail.v2.ProductInputConfig) e.getUnfinishedMessage();
+        throw e.unwrapIOException();
+      } finally {
+        if (parsedMessage != null) {
+          mergeFrom(parsedMessage);
+        }
+      }
+      return this;
+    }
+
+    private int sourceCase_ = 0;
+    private java.lang.Object source_;
+
+    public SourceCase getSourceCase() {
+      return SourceCase.forNumber(sourceCase_);
+    }
+
+    public Builder clearSource() {
+      sourceCase_ = 0;
+      source_ = null;
+      onChanged();
+      return this;
+    }
+
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.cloud.retail.v2.ProductInlineSource,
+            com.google.cloud.retail.v2.ProductInlineSource.Builder,
+            com.google.cloud.retail.v2.ProductInlineSourceOrBuilder>
+        productInlineSourceBuilder_;
+    /**
+     *
+     *
+     * <pre>
+     * The Inline source for the input content for products.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.ProductInlineSource product_inline_source = 1;</code>
+     *
+     * @return Whether the productInlineSource field is set.
+     */
+    @java.lang.Override
+    public boolean hasProductInlineSource() {
+      return sourceCase_ == 1;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The Inline source for the input content for products.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.ProductInlineSource product_inline_source = 1;</code>
+     *
+     * @return The productInlineSource.
+     */
+    @java.lang.Override
+    public com.google.cloud.retail.v2.ProductInlineSource getProductInlineSource() {
+      if (productInlineSourceBuilder_ == null) {
+        if (sourceCase_ == 1) {
+          return (com.google.cloud.retail.v2.ProductInlineSource) source_;
+        }
+        return com.google.cloud.retail.v2.ProductInlineSource.getDefaultInstance();
+      } else {
+        if (sourceCase_ == 1) {
+          return productInlineSourceBuilder_.getMessage();
+        }
+        return com.google.cloud.retail.v2.ProductInlineSource.getDefaultInstance();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The Inline source for the input content for products.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.ProductInlineSource product_inline_source = 1;</code>
+     */
+    public Builder setProductInlineSource(com.google.cloud.retail.v2.ProductInlineSource value) {
+      if (productInlineSourceBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        source_ = value;
+        onChanged();
+      } else {
+        productInlineSourceBuilder_.setMessage(value);
+      }
+      sourceCase_ = 1;
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The Inline source for the input content for products.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.ProductInlineSource product_inline_source = 1;</code>
+     */
+    public Builder setProductInlineSource(
+        com.google.cloud.retail.v2.ProductInlineSource.Builder builderForValue) {
+      if (productInlineSourceBuilder_ == null) {
+        source_ = builderForValue.build();
+        onChanged();
+      } else {
+        productInlineSourceBuilder_.setMessage(builderForValue.build());
+      }
+      sourceCase_ = 1;
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The Inline source for the input content for products.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.ProductInlineSource product_inline_source = 1;</code>
+     */
+    public Builder mergeProductInlineSource(com.google.cloud.retail.v2.ProductInlineSource value) {
+      if (productInlineSourceBuilder_ == null) {
+        if (sourceCase_ == 1
+            && source_ != com.google.cloud.retail.v2.ProductInlineSource.getDefaultInstance()) {
+          source_ =
+              com.google.cloud.retail.v2.ProductInlineSource.newBuilder(
+                      (com.google.cloud.retail.v2.ProductInlineSource) source_)
+                  .mergeFrom(value)
+                  .buildPartial();
+        } else {
+          source_ = value;
+        }
+        onChanged();
+      } else {
+        if (sourceCase_ == 1) {
+          productInlineSourceBuilder_.mergeFrom(value);
+        }
+        productInlineSourceBuilder_.setMessage(value);
+      }
+      sourceCase_ = 1;
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The Inline source for the input content for products.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.ProductInlineSource product_inline_source = 1;</code>
+     */
+    public Builder clearProductInlineSource() {
+      if (productInlineSourceBuilder_ == null) {
+        if (sourceCase_ == 1) {
+          sourceCase_ = 0;
+          source_ = null;
+          onChanged();
+        }
+      } else {
+        if (sourceCase_ == 1) {
+          sourceCase_ = 0;
+          source_ = null;
+        }
+        productInlineSourceBuilder_.clear();
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The Inline source for the input content for products.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.ProductInlineSource product_inline_source = 1;</code>
+     */
+    public com.google.cloud.retail.v2.ProductInlineSource.Builder getProductInlineSourceBuilder() {
+      return getProductInlineSourceFieldBuilder().getBuilder();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The Inline source for the input content for products.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.ProductInlineSource product_inline_source = 1;</code>
+     */
+    @java.lang.Override
+    public com.google.cloud.retail.v2.ProductInlineSourceOrBuilder
+        getProductInlineSourceOrBuilder() {
+      if ((sourceCase_ == 1) && (productInlineSourceBuilder_ != null)) {
+        return productInlineSourceBuilder_.getMessageOrBuilder();
+      } else {
+        if (sourceCase_ == 1) {
+          return (com.google.cloud.retail.v2.ProductInlineSource) source_;
+        }
+        return com.google.cloud.retail.v2.ProductInlineSource.getDefaultInstance();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The Inline source for the input content for products.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.ProductInlineSource product_inline_source = 1;</code>
+     */
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.cloud.retail.v2.ProductInlineSource,
+            com.google.cloud.retail.v2.ProductInlineSource.Builder,
+            com.google.cloud.retail.v2.ProductInlineSourceOrBuilder>
+        getProductInlineSourceFieldBuilder() {
+      if (productInlineSourceBuilder_ == null) {
+        if (!(sourceCase_ == 1)) {
+          source_ = com.google.cloud.retail.v2.ProductInlineSource.getDefaultInstance();
+        }
+        productInlineSourceBuilder_ =
+            new com.google.protobuf.SingleFieldBuilderV3<
+                com.google.cloud.retail.v2.ProductInlineSource,
+                com.google.cloud.retail.v2.ProductInlineSource.Builder,
+                com.google.cloud.retail.v2.ProductInlineSourceOrBuilder>(
+                (com.google.cloud.retail.v2.ProductInlineSource) source_,
+                getParentForChildren(),
+                isClean());
+        source_ = null;
+      }
+      sourceCase_ = 1;
+      onChanged();
+      ;
+      return productInlineSourceBuilder_;
+    }
+
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.cloud.retail.v2.GcsSource,
+            com.google.cloud.retail.v2.GcsSource.Builder,
+            com.google.cloud.retail.v2.GcsSourceOrBuilder>
+        gcsSourceBuilder_;
+    /**
+     *
+     *
+     * <pre>
+     * Google Cloud Storage location for the input content.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.GcsSource gcs_source = 2;</code>
+     *
+     * @return Whether the gcsSource field is set.
+     */
+    @java.lang.Override
+    public boolean hasGcsSource() {
+      return sourceCase_ == 2;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Google Cloud Storage location for the input content.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.GcsSource gcs_source = 2;</code>
+     *
+     * @return The gcsSource.
+     */
+    @java.lang.Override
+    public com.google.cloud.retail.v2.GcsSource getGcsSource() {
+      if (gcsSourceBuilder_ == null) {
+        if (sourceCase_ == 2) {
+          return (com.google.cloud.retail.v2.GcsSource) source_;
+        }
+        return com.google.cloud.retail.v2.GcsSource.getDefaultInstance();
+      } else {
+        if (sourceCase_ == 2) {
+          return gcsSourceBuilder_.getMessage();
+        }
+        return com.google.cloud.retail.v2.GcsSource.getDefaultInstance();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Google Cloud Storage location for the input content.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.GcsSource gcs_source = 2;</code>
+     */
+    public Builder setGcsSource(com.google.cloud.retail.v2.GcsSource value) {
+      if (gcsSourceBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        source_ = value;
+        onChanged();
+      } else {
+        gcsSourceBuilder_.setMessage(value);
+      }
+      sourceCase_ = 2;
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Google Cloud Storage location for the input content.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.GcsSource gcs_source = 2;</code>
+     */
+    public Builder setGcsSource(com.google.cloud.retail.v2.GcsSource.Builder builderForValue) {
+      if (gcsSourceBuilder_ == null) {
+        source_ = builderForValue.build();
+        onChanged();
+      } else {
+        gcsSourceBuilder_.setMessage(builderForValue.build());
+      }
+      sourceCase_ = 2;
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Google Cloud Storage location for the input content.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.GcsSource gcs_source = 2;</code>
+     */
+    public Builder mergeGcsSource(com.google.cloud.retail.v2.GcsSource value) {
+      if (gcsSourceBuilder_ == null) {
+        if (sourceCase_ == 2
+            && source_ != com.google.cloud.retail.v2.GcsSource.getDefaultInstance()) {
+          source_ =
+              com.google.cloud.retail.v2.GcsSource.newBuilder(
+                      (com.google.cloud.retail.v2.GcsSource) source_)
+                  .mergeFrom(value)
+                  .buildPartial();
+        } else {
+          source_ = value;
+        }
+        onChanged();
+      } else {
+        if (sourceCase_ == 2) {
+          gcsSourceBuilder_.mergeFrom(value);
+        }
+        gcsSourceBuilder_.setMessage(value);
+      }
+      sourceCase_ = 2;
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Google Cloud Storage location for the input content.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.GcsSource gcs_source = 2;</code>
+     */
+    public Builder clearGcsSource() {
+      if (gcsSourceBuilder_ == null) {
+        if (sourceCase_ == 2) {
+          sourceCase_ = 0;
+          source_ = null;
+          onChanged();
+        }
+      } else {
+        if (sourceCase_ == 2) {
+          sourceCase_ = 0;
+          source_ = null;
+        }
+        gcsSourceBuilder_.clear();
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Google Cloud Storage location for the input content.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.GcsSource gcs_source = 2;</code>
+     */
+    public com.google.cloud.retail.v2.GcsSource.Builder getGcsSourceBuilder() {
+      return getGcsSourceFieldBuilder().getBuilder();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Google Cloud Storage location for the input content.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.GcsSource gcs_source = 2;</code>
+     */
+    @java.lang.Override
+    public com.google.cloud.retail.v2.GcsSourceOrBuilder getGcsSourceOrBuilder() {
+      if ((sourceCase_ == 2) && (gcsSourceBuilder_ != null)) {
+        return gcsSourceBuilder_.getMessageOrBuilder();
+      } else {
+        if (sourceCase_ == 2) {
+          return (com.google.cloud.retail.v2.GcsSource) source_;
+        }
+        return com.google.cloud.retail.v2.GcsSource.getDefaultInstance();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Google Cloud Storage location for the input content.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.GcsSource gcs_source = 2;</code>
+     */
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.cloud.retail.v2.GcsSource,
+            com.google.cloud.retail.v2.GcsSource.Builder,
+            com.google.cloud.retail.v2.GcsSourceOrBuilder>
+        getGcsSourceFieldBuilder() {
+      if (gcsSourceBuilder_ == null) {
+        if (!(sourceCase_ == 2)) {
+          source_ = com.google.cloud.retail.v2.GcsSource.getDefaultInstance();
+        }
+        gcsSourceBuilder_ =
+            new com.google.protobuf.SingleFieldBuilderV3<
+                com.google.cloud.retail.v2.GcsSource,
+                com.google.cloud.retail.v2.GcsSource.Builder,
+                com.google.cloud.retail.v2.GcsSourceOrBuilder>(
+                (com.google.cloud.retail.v2.GcsSource) source_, getParentForChildren(), isClean());
+        source_ = null;
+      }
+      sourceCase_ = 2;
+      onChanged();
+      ;
+      return gcsSourceBuilder_;
+    }
+
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.cloud.retail.v2.BigQuerySource,
+            com.google.cloud.retail.v2.BigQuerySource.Builder,
+            com.google.cloud.retail.v2.BigQuerySourceOrBuilder>
+        bigQuerySourceBuilder_;
+    /**
+     *
+     *
+     * <pre>
+     * BigQuery input source.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.BigQuerySource big_query_source = 3;</code>
+     *
+     * @return Whether the bigQuerySource field is set.
+     */
+    @java.lang.Override
+    public boolean hasBigQuerySource() {
+      return sourceCase_ == 3;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * BigQuery input source.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.BigQuerySource big_query_source = 3;</code>
+     *
+     * @return The bigQuerySource.
+     */
+    @java.lang.Override
+    public com.google.cloud.retail.v2.BigQuerySource getBigQuerySource() {
+      if (bigQuerySourceBuilder_ == null) {
+        if (sourceCase_ == 3) {
+          return (com.google.cloud.retail.v2.BigQuerySource) source_;
+        }
+        return com.google.cloud.retail.v2.BigQuerySource.getDefaultInstance();
+      } else {
+        if (sourceCase_ == 3) {
+          return bigQuerySourceBuilder_.getMessage();
+        }
+        return com.google.cloud.retail.v2.BigQuerySource.getDefaultInstance();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * BigQuery input source.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.BigQuerySource big_query_source = 3;</code>
+     */
+    public Builder setBigQuerySource(com.google.cloud.retail.v2.BigQuerySource value) {
+      if (bigQuerySourceBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        source_ = value;
+        onChanged();
+      } else {
+        bigQuerySourceBuilder_.setMessage(value);
+      }
+      sourceCase_ = 3;
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * BigQuery input source.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.BigQuerySource big_query_source = 3;</code>
+     */
+    public Builder setBigQuerySource(
+        com.google.cloud.retail.v2.BigQuerySource.Builder builderForValue) {
+      if (bigQuerySourceBuilder_ == null) {
+        source_ = builderForValue.build();
+        onChanged();
+      } else {
+        bigQuerySourceBuilder_.setMessage(builderForValue.build());
+      }
+      sourceCase_ = 3;
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * BigQuery input source.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.BigQuerySource big_query_source = 3;</code>
+     */
+    public Builder mergeBigQuerySource(com.google.cloud.retail.v2.BigQuerySource value) {
+      if (bigQuerySourceBuilder_ == null) {
+        if (sourceCase_ == 3
+            && source_ != com.google.cloud.retail.v2.BigQuerySource.getDefaultInstance()) {
+          source_ =
+              com.google.cloud.retail.v2.BigQuerySource.newBuilder(
+                      (com.google.cloud.retail.v2.BigQuerySource) source_)
+                  .mergeFrom(value)
+                  .buildPartial();
+        } else {
+          source_ = value;
+        }
+        onChanged();
+      } else {
+        if (sourceCase_ == 3) {
+          bigQuerySourceBuilder_.mergeFrom(value);
+        }
+        bigQuerySourceBuilder_.setMessage(value);
+      }
+      sourceCase_ = 3;
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * BigQuery input source.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.BigQuerySource big_query_source = 3;</code>
+     */
+    public Builder clearBigQuerySource() {
+      if (bigQuerySourceBuilder_ == null) {
+        if (sourceCase_ == 3) {
+          sourceCase_ = 0;
+          source_ = null;
+          onChanged();
+        }
+      } else {
+        if (sourceCase_ == 3) {
+          sourceCase_ = 0;
+          source_ = null;
+        }
+        bigQuerySourceBuilder_.clear();
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * BigQuery input source.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.BigQuerySource big_query_source = 3;</code>
+     */
+    public com.google.cloud.retail.v2.BigQuerySource.Builder getBigQuerySourceBuilder() {
+      return getBigQuerySourceFieldBuilder().getBuilder();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * BigQuery input source.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.BigQuerySource big_query_source = 3;</code>
+     */
+    @java.lang.Override
+    public com.google.cloud.retail.v2.BigQuerySourceOrBuilder getBigQuerySourceOrBuilder() {
+      if ((sourceCase_ == 3) && (bigQuerySourceBuilder_ != null)) {
+        return bigQuerySourceBuilder_.getMessageOrBuilder();
+      } else {
+        if (sourceCase_ == 3) {
+          return (com.google.cloud.retail.v2.BigQuerySource) source_;
+        }
+        return com.google.cloud.retail.v2.BigQuerySource.getDefaultInstance();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * BigQuery input source.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.BigQuerySource big_query_source = 3;</code>
+     */
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.cloud.retail.v2.BigQuerySource,
+            com.google.cloud.retail.v2.BigQuerySource.Builder,
+            com.google.cloud.retail.v2.BigQuerySourceOrBuilder>
+        getBigQuerySourceFieldBuilder() {
+      if (bigQuerySourceBuilder_ == null) {
+        if (!(sourceCase_ == 3)) {
+          source_ = com.google.cloud.retail.v2.BigQuerySource.getDefaultInstance();
+        }
+        bigQuerySourceBuilder_ =
+            new com.google.protobuf.SingleFieldBuilderV3<
+                com.google.cloud.retail.v2.BigQuerySource,
+                com.google.cloud.retail.v2.BigQuerySource.Builder,
+                com.google.cloud.retail.v2.BigQuerySourceOrBuilder>(
+                (com.google.cloud.retail.v2.BigQuerySource) source_,
+                getParentForChildren(),
+                isClean());
+        source_ = null;
+      }
+      sourceCase_ = 3;
+      onChanged();
+      ;
+      return bigQuerySourceBuilder_;
+    }
+
+    @java.lang.Override
+    public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.setUnknownFields(unknownFields);
+    }
+
+    @java.lang.Override
+    public final Builder mergeUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.mergeUnknownFields(unknownFields);
+    }
+
+    // @@protoc_insertion_point(builder_scope:google.cloud.retail.v2.ProductInputConfig)
+  }
+
+  // @@protoc_insertion_point(class_scope:google.cloud.retail.v2.ProductInputConfig)
+  private static final com.google.cloud.retail.v2.ProductInputConfig DEFAULT_INSTANCE;
+
+  static {
+    DEFAULT_INSTANCE = new com.google.cloud.retail.v2.ProductInputConfig();
+  }
+
+  public static com.google.cloud.retail.v2.ProductInputConfig getDefaultInstance() {
+    return DEFAULT_INSTANCE;
+  }
+
+  private static final com.google.protobuf.Parser<ProductInputConfig> PARSER =
+      new com.google.protobuf.AbstractParser<ProductInputConfig>() {
+        @java.lang.Override
+        public ProductInputConfig parsePartialFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws com.google.protobuf.InvalidProtocolBufferException {
+          return new ProductInputConfig(input, extensionRegistry);
+        }
+      };
+
+  public static com.google.protobuf.Parser<ProductInputConfig> parser() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.protobuf.Parser<ProductInputConfig> getParserForType() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.cloud.retail.v2.ProductInputConfig getDefaultInstanceForType() {
+    return DEFAULT_INSTANCE;
+  }
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ProductInputConfigOrBuilder.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ProductInputConfigOrBuilder.java
new file mode 100644
index 00000000..6d3c05b2
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ProductInputConfigOrBuilder.java
@@ -0,0 +1,132 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/import_config.proto
+
+package com.google.cloud.retail.v2;
+
+public interface ProductInputConfigOrBuilder
+    extends
+    // @@protoc_insertion_point(interface_extends:google.cloud.retail.v2.ProductInputConfig)
+    com.google.protobuf.MessageOrBuilder {
+
+  /**
+   *
+   *
+   * <pre>
+   * The Inline source for the input content for products.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.ProductInlineSource product_inline_source = 1;</code>
+   *
+   * @return Whether the productInlineSource field is set.
+   */
+  boolean hasProductInlineSource();
+  /**
+   *
+   *
+   * <pre>
+   * The Inline source for the input content for products.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.ProductInlineSource product_inline_source = 1;</code>
+   *
+   * @return The productInlineSource.
+   */
+  com.google.cloud.retail.v2.ProductInlineSource getProductInlineSource();
+  /**
+   *
+   *
+   * <pre>
+   * The Inline source for the input content for products.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.ProductInlineSource product_inline_source = 1;</code>
+   */
+  com.google.cloud.retail.v2.ProductInlineSourceOrBuilder getProductInlineSourceOrBuilder();
+
+  /**
+   *
+   *
+   * <pre>
+   * Google Cloud Storage location for the input content.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.GcsSource gcs_source = 2;</code>
+   *
+   * @return Whether the gcsSource field is set.
+   */
+  boolean hasGcsSource();
+  /**
+   *
+   *
+   * <pre>
+   * Google Cloud Storage location for the input content.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.GcsSource gcs_source = 2;</code>
+   *
+   * @return The gcsSource.
+   */
+  com.google.cloud.retail.v2.GcsSource getGcsSource();
+  /**
+   *
+   *
+   * <pre>
+   * Google Cloud Storage location for the input content.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.GcsSource gcs_source = 2;</code>
+   */
+  com.google.cloud.retail.v2.GcsSourceOrBuilder getGcsSourceOrBuilder();
+
+  /**
+   *
+   *
+   * <pre>
+   * BigQuery input source.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.BigQuerySource big_query_source = 3;</code>
+   *
+   * @return Whether the bigQuerySource field is set.
+   */
+  boolean hasBigQuerySource();
+  /**
+   *
+   *
+   * <pre>
+   * BigQuery input source.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.BigQuerySource big_query_source = 3;</code>
+   *
+   * @return The bigQuerySource.
+   */
+  com.google.cloud.retail.v2.BigQuerySource getBigQuerySource();
+  /**
+   *
+   *
+   * <pre>
+   * BigQuery input source.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.BigQuerySource big_query_source = 3;</code>
+   */
+  com.google.cloud.retail.v2.BigQuerySourceOrBuilder getBigQuerySourceOrBuilder();
+
+  public com.google.cloud.retail.v2.ProductInputConfig.SourceCase getSourceCase();
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ProductLevelConfig.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ProductLevelConfig.java
new file mode 100644
index 00000000..66e50e0f
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ProductLevelConfig.java
@@ -0,0 +1,1070 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/catalog.proto
+
+package com.google.cloud.retail.v2;
+
+/**
+ *
+ *
+ * <pre>
+ * Configures what level the product should be uploaded with regards to
+ * how users will be send events and how predictions will be made.
+ * </pre>
+ *
+ * Protobuf type {@code google.cloud.retail.v2.ProductLevelConfig}
+ */
+public final class ProductLevelConfig extends com.google.protobuf.GeneratedMessageV3
+    implements
+    // @@protoc_insertion_point(message_implements:google.cloud.retail.v2.ProductLevelConfig)
+    ProductLevelConfigOrBuilder {
+  private static final long serialVersionUID = 0L;
+  // Use ProductLevelConfig.newBuilder() to construct.
+  private ProductLevelConfig(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+    super(builder);
+  }
+
+  private ProductLevelConfig() {
+    ingestionProductType_ = "";
+    merchantCenterProductIdField_ = "";
+  }
+
+  @java.lang.Override
+  @SuppressWarnings({"unused"})
+  protected java.lang.Object newInstance(UnusedPrivateParameter unused) {
+    return new ProductLevelConfig();
+  }
+
+  @java.lang.Override
+  public final com.google.protobuf.UnknownFieldSet getUnknownFields() {
+    return this.unknownFields;
+  }
+
+  private ProductLevelConfig(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    this();
+    if (extensionRegistry == null) {
+      throw new java.lang.NullPointerException();
+    }
+    com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+        com.google.protobuf.UnknownFieldSet.newBuilder();
+    try {
+      boolean done = false;
+      while (!done) {
+        int tag = input.readTag();
+        switch (tag) {
+          case 0:
+            done = true;
+            break;
+          case 10:
+            {
+              java.lang.String s = input.readStringRequireUtf8();
+
+              ingestionProductType_ = s;
+              break;
+            }
+          case 18:
+            {
+              java.lang.String s = input.readStringRequireUtf8();
+
+              merchantCenterProductIdField_ = s;
+              break;
+            }
+          default:
+            {
+              if (!parseUnknownField(input, unknownFields, extensionRegistry, tag)) {
+                done = true;
+              }
+              break;
+            }
+        }
+      }
+    } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+      throw e.setUnfinishedMessage(this);
+    } catch (java.io.IOException e) {
+      throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
+    } finally {
+      this.unknownFields = unknownFields.build();
+      makeExtensionsImmutable();
+    }
+  }
+
+  public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+    return com.google.cloud.retail.v2.CatalogProto
+        .internal_static_google_cloud_retail_v2_ProductLevelConfig_descriptor;
+  }
+
+  @java.lang.Override
+  protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internalGetFieldAccessorTable() {
+    return com.google.cloud.retail.v2.CatalogProto
+        .internal_static_google_cloud_retail_v2_ProductLevelConfig_fieldAccessorTable
+        .ensureFieldAccessorsInitialized(
+            com.google.cloud.retail.v2.ProductLevelConfig.class,
+            com.google.cloud.retail.v2.ProductLevelConfig.Builder.class);
+  }
+
+  public static final int INGESTION_PRODUCT_TYPE_FIELD_NUMBER = 1;
+  private volatile java.lang.Object ingestionProductType_;
+  /**
+   *
+   *
+   * <pre>
+   * The type of [Product][google.cloud.retail.v2.Product]s allowed to be
+   * ingested into the catalog. Acceptable values are:
+   * * `primary` (default): You can only ingest
+   * [Product.Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
+   *   [Product][google.cloud.retail.v2.Product]s. This means
+   *   [Product.primary_product_id][google.cloud.retail.v2.Product.primary_product_id]
+   *   can only be empty or set to the same value as
+   *   [Product.id][google.cloud.retail.v2.Product.id].
+   * * `variant`: You can only ingest
+   * [Product.Type.VARIANT][google.cloud.retail.v2.Product.Type.VARIANT]
+   * [Product][google.cloud.retail.v2.Product]s.
+   *   This means
+   *   [Product.primary_product_id][google.cloud.retail.v2.Product.primary_product_id]
+   *   cannot be empty.
+   * If this field is set to an invalid value other than these, an
+   * INVALID_ARGUMENT error is returned.
+   * If this field is `variant` and
+   * [merchant_center_product_id_field][google.cloud.retail.v2.ProductLevelConfig.merchant_center_product_id_field]
+   * is `itemGroupId`, an INVALID_ARGUMENT error is returned.
+   * See [Using catalog
+   * levels](/retail/recommendations-ai/docs/catalog#catalog-levels) for more
+   * details.
+   * </pre>
+   *
+   * <code>string ingestion_product_type = 1;</code>
+   *
+   * @return The ingestionProductType.
+   */
+  @java.lang.Override
+  public java.lang.String getIngestionProductType() {
+    java.lang.Object ref = ingestionProductType_;
+    if (ref instanceof java.lang.String) {
+      return (java.lang.String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+      java.lang.String s = bs.toStringUtf8();
+      ingestionProductType_ = s;
+      return s;
+    }
+  }
+  /**
+   *
+   *
+   * <pre>
+   * The type of [Product][google.cloud.retail.v2.Product]s allowed to be
+   * ingested into the catalog. Acceptable values are:
+   * * `primary` (default): You can only ingest
+   * [Product.Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
+   *   [Product][google.cloud.retail.v2.Product]s. This means
+   *   [Product.primary_product_id][google.cloud.retail.v2.Product.primary_product_id]
+   *   can only be empty or set to the same value as
+   *   [Product.id][google.cloud.retail.v2.Product.id].
+   * * `variant`: You can only ingest
+   * [Product.Type.VARIANT][google.cloud.retail.v2.Product.Type.VARIANT]
+   * [Product][google.cloud.retail.v2.Product]s.
+   *   This means
+   *   [Product.primary_product_id][google.cloud.retail.v2.Product.primary_product_id]
+   *   cannot be empty.
+   * If this field is set to an invalid value other than these, an
+   * INVALID_ARGUMENT error is returned.
+   * If this field is `variant` and
+   * [merchant_center_product_id_field][google.cloud.retail.v2.ProductLevelConfig.merchant_center_product_id_field]
+   * is `itemGroupId`, an INVALID_ARGUMENT error is returned.
+   * See [Using catalog
+   * levels](/retail/recommendations-ai/docs/catalog#catalog-levels) for more
+   * details.
+   * </pre>
+   *
+   * <code>string ingestion_product_type = 1;</code>
+   *
+   * @return The bytes for ingestionProductType.
+   */
+  @java.lang.Override
+  public com.google.protobuf.ByteString getIngestionProductTypeBytes() {
+    java.lang.Object ref = ingestionProductType_;
+    if (ref instanceof java.lang.String) {
+      com.google.protobuf.ByteString b =
+          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+      ingestionProductType_ = b;
+      return b;
+    } else {
+      return (com.google.protobuf.ByteString) ref;
+    }
+  }
+
+  public static final int MERCHANT_CENTER_PRODUCT_ID_FIELD_FIELD_NUMBER = 2;
+  private volatile java.lang.Object merchantCenterProductIdField_;
+  /**
+   *
+   *
+   * <pre>
+   * Which field of [Merchant Center
+   * Product](/bigquery-transfer/docs/merchant-center-products-schema) should be
+   * imported as [Product.id][google.cloud.retail.v2.Product.id]. Acceptable
+   * values are:
+   * * `offerId` (default): Import `offerId` as the product ID.
+   * * `itemGroupId`: Import `itemGroupId` as the product ID. Notice that Retail
+   *   API will choose one item from the ones with the same `itemGroupId`, and
+   *   use it to represent the item group.
+   * If this field is set to an invalid value other than these, an
+   * INVALID_ARGUMENT error is returned.
+   * If this field is `itemGroupId` and
+   * [ingestion_product_type][google.cloud.retail.v2.ProductLevelConfig.ingestion_product_type]
+   * is `variant`, an INVALID_ARGUMENT error is returned.
+   * See [Using catalog
+   * levels](/retail/recommendations-ai/docs/catalog#catalog-levels) for more
+   * details.
+   * </pre>
+   *
+   * <code>string merchant_center_product_id_field = 2;</code>
+   *
+   * @return The merchantCenterProductIdField.
+   */
+  @java.lang.Override
+  public java.lang.String getMerchantCenterProductIdField() {
+    java.lang.Object ref = merchantCenterProductIdField_;
+    if (ref instanceof java.lang.String) {
+      return (java.lang.String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+      java.lang.String s = bs.toStringUtf8();
+      merchantCenterProductIdField_ = s;
+      return s;
+    }
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Which field of [Merchant Center
+   * Product](/bigquery-transfer/docs/merchant-center-products-schema) should be
+   * imported as [Product.id][google.cloud.retail.v2.Product.id]. Acceptable
+   * values are:
+   * * `offerId` (default): Import `offerId` as the product ID.
+   * * `itemGroupId`: Import `itemGroupId` as the product ID. Notice that Retail
+   *   API will choose one item from the ones with the same `itemGroupId`, and
+   *   use it to represent the item group.
+   * If this field is set to an invalid value other than these, an
+   * INVALID_ARGUMENT error is returned.
+   * If this field is `itemGroupId` and
+   * [ingestion_product_type][google.cloud.retail.v2.ProductLevelConfig.ingestion_product_type]
+   * is `variant`, an INVALID_ARGUMENT error is returned.
+   * See [Using catalog
+   * levels](/retail/recommendations-ai/docs/catalog#catalog-levels) for more
+   * details.
+   * </pre>
+   *
+   * <code>string merchant_center_product_id_field = 2;</code>
+   *
+   * @return The bytes for merchantCenterProductIdField.
+   */
+  @java.lang.Override
+  public com.google.protobuf.ByteString getMerchantCenterProductIdFieldBytes() {
+    java.lang.Object ref = merchantCenterProductIdField_;
+    if (ref instanceof java.lang.String) {
+      com.google.protobuf.ByteString b =
+          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+      merchantCenterProductIdField_ = b;
+      return b;
+    } else {
+      return (com.google.protobuf.ByteString) ref;
+    }
+  }
+
+  private byte memoizedIsInitialized = -1;
+
+  @java.lang.Override
+  public final boolean isInitialized() {
+    byte isInitialized = memoizedIsInitialized;
+    if (isInitialized == 1) return true;
+    if (isInitialized == 0) return false;
+
+    memoizedIsInitialized = 1;
+    return true;
+  }
+
+  @java.lang.Override
+  public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
+    if (!getIngestionProductTypeBytes().isEmpty()) {
+      com.google.protobuf.GeneratedMessageV3.writeString(output, 1, ingestionProductType_);
+    }
+    if (!getMerchantCenterProductIdFieldBytes().isEmpty()) {
+      com.google.protobuf.GeneratedMessageV3.writeString(output, 2, merchantCenterProductIdField_);
+    }
+    unknownFields.writeTo(output);
+  }
+
+  @java.lang.Override
+  public int getSerializedSize() {
+    int size = memoizedSize;
+    if (size != -1) return size;
+
+    size = 0;
+    if (!getIngestionProductTypeBytes().isEmpty()) {
+      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(1, ingestionProductType_);
+    }
+    if (!getMerchantCenterProductIdFieldBytes().isEmpty()) {
+      size +=
+          com.google.protobuf.GeneratedMessageV3.computeStringSize(
+              2, merchantCenterProductIdField_);
+    }
+    size += unknownFields.getSerializedSize();
+    memoizedSize = size;
+    return size;
+  }
+
+  @java.lang.Override
+  public boolean equals(final java.lang.Object obj) {
+    if (obj == this) {
+      return true;
+    }
+    if (!(obj instanceof com.google.cloud.retail.v2.ProductLevelConfig)) {
+      return super.equals(obj);
+    }
+    com.google.cloud.retail.v2.ProductLevelConfig other =
+        (com.google.cloud.retail.v2.ProductLevelConfig) obj;
+
+    if (!getIngestionProductType().equals(other.getIngestionProductType())) return false;
+    if (!getMerchantCenterProductIdField().equals(other.getMerchantCenterProductIdField()))
+      return false;
+    if (!unknownFields.equals(other.unknownFields)) return false;
+    return true;
+  }
+
+  @java.lang.Override
+  public int hashCode() {
+    if (memoizedHashCode != 0) {
+      return memoizedHashCode;
+    }
+    int hash = 41;
+    hash = (19 * hash) + getDescriptor().hashCode();
+    hash = (37 * hash) + INGESTION_PRODUCT_TYPE_FIELD_NUMBER;
+    hash = (53 * hash) + getIngestionProductType().hashCode();
+    hash = (37 * hash) + MERCHANT_CENTER_PRODUCT_ID_FIELD_FIELD_NUMBER;
+    hash = (53 * hash) + getMerchantCenterProductIdField().hashCode();
+    hash = (29 * hash) + unknownFields.hashCode();
+    memoizedHashCode = hash;
+    return hash;
+  }
+
+  public static com.google.cloud.retail.v2.ProductLevelConfig parseFrom(java.nio.ByteBuffer data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.ProductLevelConfig parseFrom(
+      java.nio.ByteBuffer data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.ProductLevelConfig parseFrom(
+      com.google.protobuf.ByteString data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.ProductLevelConfig parseFrom(
+      com.google.protobuf.ByteString data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.ProductLevelConfig parseFrom(byte[] data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.ProductLevelConfig parseFrom(
+      byte[] data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.ProductLevelConfig parseFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.ProductLevelConfig parseFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.ProductLevelConfig parseDelimitedFrom(
+      java.io.InputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.ProductLevelConfig parseDelimitedFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.ProductLevelConfig parseFrom(
+      com.google.protobuf.CodedInputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.ProductLevelConfig parseFrom(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  @java.lang.Override
+  public Builder newBuilderForType() {
+    return newBuilder();
+  }
+
+  public static Builder newBuilder() {
+    return DEFAULT_INSTANCE.toBuilder();
+  }
+
+  public static Builder newBuilder(com.google.cloud.retail.v2.ProductLevelConfig prototype) {
+    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+  }
+
+  @java.lang.Override
+  public Builder toBuilder() {
+    return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
+  }
+
+  @java.lang.Override
+  protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+    Builder builder = new Builder(parent);
+    return builder;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Configures what level the product should be uploaded with regards to
+   * how users will be send events and how predictions will be made.
+   * </pre>
+   *
+   * Protobuf type {@code google.cloud.retail.v2.ProductLevelConfig}
+   */
+  public static final class Builder extends com.google.protobuf.GeneratedMessageV3.Builder<Builder>
+      implements
+      // @@protoc_insertion_point(builder_implements:google.cloud.retail.v2.ProductLevelConfig)
+      com.google.cloud.retail.v2.ProductLevelConfigOrBuilder {
+    public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+      return com.google.cloud.retail.v2.CatalogProto
+          .internal_static_google_cloud_retail_v2_ProductLevelConfig_descriptor;
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return com.google.cloud.retail.v2.CatalogProto
+          .internal_static_google_cloud_retail_v2_ProductLevelConfig_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              com.google.cloud.retail.v2.ProductLevelConfig.class,
+              com.google.cloud.retail.v2.ProductLevelConfig.Builder.class);
+    }
+
+    // Construct using com.google.cloud.retail.v2.ProductLevelConfig.newBuilder()
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
+
+    private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+      super(parent);
+      maybeForceBuilderInitialization();
+    }
+
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders) {}
+    }
+
+    @java.lang.Override
+    public Builder clear() {
+      super.clear();
+      ingestionProductType_ = "";
+
+      merchantCenterProductIdField_ = "";
+
+      return this;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
+      return com.google.cloud.retail.v2.CatalogProto
+          .internal_static_google_cloud_retail_v2_ProductLevelConfig_descriptor;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.ProductLevelConfig getDefaultInstanceForType() {
+      return com.google.cloud.retail.v2.ProductLevelConfig.getDefaultInstance();
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.ProductLevelConfig build() {
+      com.google.cloud.retail.v2.ProductLevelConfig result = buildPartial();
+      if (!result.isInitialized()) {
+        throw newUninitializedMessageException(result);
+      }
+      return result;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.ProductLevelConfig buildPartial() {
+      com.google.cloud.retail.v2.ProductLevelConfig result =
+          new com.google.cloud.retail.v2.ProductLevelConfig(this);
+      result.ingestionProductType_ = ingestionProductType_;
+      result.merchantCenterProductIdField_ = merchantCenterProductIdField_;
+      onBuilt();
+      return result;
+    }
+
+    @java.lang.Override
+    public Builder clone() {
+      return super.clone();
+    }
+
+    @java.lang.Override
+    public Builder setField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.setField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
+      return super.clearField(field);
+    }
+
+    @java.lang.Override
+    public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+      return super.clearOneof(oneof);
+    }
+
+    @java.lang.Override
+    public Builder setRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, int index, java.lang.Object value) {
+      return super.setRepeatedField(field, index, value);
+    }
+
+    @java.lang.Override
+    public Builder addRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.addRepeatedField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(com.google.protobuf.Message other) {
+      if (other instanceof com.google.cloud.retail.v2.ProductLevelConfig) {
+        return mergeFrom((com.google.cloud.retail.v2.ProductLevelConfig) other);
+      } else {
+        super.mergeFrom(other);
+        return this;
+      }
+    }
+
+    public Builder mergeFrom(com.google.cloud.retail.v2.ProductLevelConfig other) {
+      if (other == com.google.cloud.retail.v2.ProductLevelConfig.getDefaultInstance()) return this;
+      if (!other.getIngestionProductType().isEmpty()) {
+        ingestionProductType_ = other.ingestionProductType_;
+        onChanged();
+      }
+      if (!other.getMerchantCenterProductIdField().isEmpty()) {
+        merchantCenterProductIdField_ = other.merchantCenterProductIdField_;
+        onChanged();
+      }
+      this.mergeUnknownFields(other.unknownFields);
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final boolean isInitialized() {
+      return true;
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      com.google.cloud.retail.v2.ProductLevelConfig parsedMessage = null;
+      try {
+        parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        parsedMessage = (com.google.cloud.retail.v2.ProductLevelConfig) e.getUnfinishedMessage();
+        throw e.unwrapIOException();
+      } finally {
+        if (parsedMessage != null) {
+          mergeFrom(parsedMessage);
+        }
+      }
+      return this;
+    }
+
+    private java.lang.Object ingestionProductType_ = "";
+    /**
+     *
+     *
+     * <pre>
+     * The type of [Product][google.cloud.retail.v2.Product]s allowed to be
+     * ingested into the catalog. Acceptable values are:
+     * * `primary` (default): You can only ingest
+     * [Product.Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
+     *   [Product][google.cloud.retail.v2.Product]s. This means
+     *   [Product.primary_product_id][google.cloud.retail.v2.Product.primary_product_id]
+     *   can only be empty or set to the same value as
+     *   [Product.id][google.cloud.retail.v2.Product.id].
+     * * `variant`: You can only ingest
+     * [Product.Type.VARIANT][google.cloud.retail.v2.Product.Type.VARIANT]
+     * [Product][google.cloud.retail.v2.Product]s.
+     *   This means
+     *   [Product.primary_product_id][google.cloud.retail.v2.Product.primary_product_id]
+     *   cannot be empty.
+     * If this field is set to an invalid value other than these, an
+     * INVALID_ARGUMENT error is returned.
+     * If this field is `variant` and
+     * [merchant_center_product_id_field][google.cloud.retail.v2.ProductLevelConfig.merchant_center_product_id_field]
+     * is `itemGroupId`, an INVALID_ARGUMENT error is returned.
+     * See [Using catalog
+     * levels](/retail/recommendations-ai/docs/catalog#catalog-levels) for more
+     * details.
+     * </pre>
+     *
+     * <code>string ingestion_product_type = 1;</code>
+     *
+     * @return The ingestionProductType.
+     */
+    public java.lang.String getIngestionProductType() {
+      java.lang.Object ref = ingestionProductType_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        ingestionProductType_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The type of [Product][google.cloud.retail.v2.Product]s allowed to be
+     * ingested into the catalog. Acceptable values are:
+     * * `primary` (default): You can only ingest
+     * [Product.Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
+     *   [Product][google.cloud.retail.v2.Product]s. This means
+     *   [Product.primary_product_id][google.cloud.retail.v2.Product.primary_product_id]
+     *   can only be empty or set to the same value as
+     *   [Product.id][google.cloud.retail.v2.Product.id].
+     * * `variant`: You can only ingest
+     * [Product.Type.VARIANT][google.cloud.retail.v2.Product.Type.VARIANT]
+     * [Product][google.cloud.retail.v2.Product]s.
+     *   This means
+     *   [Product.primary_product_id][google.cloud.retail.v2.Product.primary_product_id]
+     *   cannot be empty.
+     * If this field is set to an invalid value other than these, an
+     * INVALID_ARGUMENT error is returned.
+     * If this field is `variant` and
+     * [merchant_center_product_id_field][google.cloud.retail.v2.ProductLevelConfig.merchant_center_product_id_field]
+     * is `itemGroupId`, an INVALID_ARGUMENT error is returned.
+     * See [Using catalog
+     * levels](/retail/recommendations-ai/docs/catalog#catalog-levels) for more
+     * details.
+     * </pre>
+     *
+     * <code>string ingestion_product_type = 1;</code>
+     *
+     * @return The bytes for ingestionProductType.
+     */
+    public com.google.protobuf.ByteString getIngestionProductTypeBytes() {
+      java.lang.Object ref = ingestionProductType_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b =
+            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+        ingestionProductType_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The type of [Product][google.cloud.retail.v2.Product]s allowed to be
+     * ingested into the catalog. Acceptable values are:
+     * * `primary` (default): You can only ingest
+     * [Product.Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
+     *   [Product][google.cloud.retail.v2.Product]s. This means
+     *   [Product.primary_product_id][google.cloud.retail.v2.Product.primary_product_id]
+     *   can only be empty or set to the same value as
+     *   [Product.id][google.cloud.retail.v2.Product.id].
+     * * `variant`: You can only ingest
+     * [Product.Type.VARIANT][google.cloud.retail.v2.Product.Type.VARIANT]
+     * [Product][google.cloud.retail.v2.Product]s.
+     *   This means
+     *   [Product.primary_product_id][google.cloud.retail.v2.Product.primary_product_id]
+     *   cannot be empty.
+     * If this field is set to an invalid value other than these, an
+     * INVALID_ARGUMENT error is returned.
+     * If this field is `variant` and
+     * [merchant_center_product_id_field][google.cloud.retail.v2.ProductLevelConfig.merchant_center_product_id_field]
+     * is `itemGroupId`, an INVALID_ARGUMENT error is returned.
+     * See [Using catalog
+     * levels](/retail/recommendations-ai/docs/catalog#catalog-levels) for more
+     * details.
+     * </pre>
+     *
+     * <code>string ingestion_product_type = 1;</code>
+     *
+     * @param value The ingestionProductType to set.
+     * @return This builder for chaining.
+     */
+    public Builder setIngestionProductType(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+
+      ingestionProductType_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The type of [Product][google.cloud.retail.v2.Product]s allowed to be
+     * ingested into the catalog. Acceptable values are:
+     * * `primary` (default): You can only ingest
+     * [Product.Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
+     *   [Product][google.cloud.retail.v2.Product]s. This means
+     *   [Product.primary_product_id][google.cloud.retail.v2.Product.primary_product_id]
+     *   can only be empty or set to the same value as
+     *   [Product.id][google.cloud.retail.v2.Product.id].
+     * * `variant`: You can only ingest
+     * [Product.Type.VARIANT][google.cloud.retail.v2.Product.Type.VARIANT]
+     * [Product][google.cloud.retail.v2.Product]s.
+     *   This means
+     *   [Product.primary_product_id][google.cloud.retail.v2.Product.primary_product_id]
+     *   cannot be empty.
+     * If this field is set to an invalid value other than these, an
+     * INVALID_ARGUMENT error is returned.
+     * If this field is `variant` and
+     * [merchant_center_product_id_field][google.cloud.retail.v2.ProductLevelConfig.merchant_center_product_id_field]
+     * is `itemGroupId`, an INVALID_ARGUMENT error is returned.
+     * See [Using catalog
+     * levels](/retail/recommendations-ai/docs/catalog#catalog-levels) for more
+     * details.
+     * </pre>
+     *
+     * <code>string ingestion_product_type = 1;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearIngestionProductType() {
+
+      ingestionProductType_ = getDefaultInstance().getIngestionProductType();
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The type of [Product][google.cloud.retail.v2.Product]s allowed to be
+     * ingested into the catalog. Acceptable values are:
+     * * `primary` (default): You can only ingest
+     * [Product.Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
+     *   [Product][google.cloud.retail.v2.Product]s. This means
+     *   [Product.primary_product_id][google.cloud.retail.v2.Product.primary_product_id]
+     *   can only be empty or set to the same value as
+     *   [Product.id][google.cloud.retail.v2.Product.id].
+     * * `variant`: You can only ingest
+     * [Product.Type.VARIANT][google.cloud.retail.v2.Product.Type.VARIANT]
+     * [Product][google.cloud.retail.v2.Product]s.
+     *   This means
+     *   [Product.primary_product_id][google.cloud.retail.v2.Product.primary_product_id]
+     *   cannot be empty.
+     * If this field is set to an invalid value other than these, an
+     * INVALID_ARGUMENT error is returned.
+     * If this field is `variant` and
+     * [merchant_center_product_id_field][google.cloud.retail.v2.ProductLevelConfig.merchant_center_product_id_field]
+     * is `itemGroupId`, an INVALID_ARGUMENT error is returned.
+     * See [Using catalog
+     * levels](/retail/recommendations-ai/docs/catalog#catalog-levels) for more
+     * details.
+     * </pre>
+     *
+     * <code>string ingestion_product_type = 1;</code>
+     *
+     * @param value The bytes for ingestionProductType to set.
+     * @return This builder for chaining.
+     */
+    public Builder setIngestionProductTypeBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+
+      ingestionProductType_ = value;
+      onChanged();
+      return this;
+    }
+
+    private java.lang.Object merchantCenterProductIdField_ = "";
+    /**
+     *
+     *
+     * <pre>
+     * Which field of [Merchant Center
+     * Product](/bigquery-transfer/docs/merchant-center-products-schema) should be
+     * imported as [Product.id][google.cloud.retail.v2.Product.id]. Acceptable
+     * values are:
+     * * `offerId` (default): Import `offerId` as the product ID.
+     * * `itemGroupId`: Import `itemGroupId` as the product ID. Notice that Retail
+     *   API will choose one item from the ones with the same `itemGroupId`, and
+     *   use it to represent the item group.
+     * If this field is set to an invalid value other than these, an
+     * INVALID_ARGUMENT error is returned.
+     * If this field is `itemGroupId` and
+     * [ingestion_product_type][google.cloud.retail.v2.ProductLevelConfig.ingestion_product_type]
+     * is `variant`, an INVALID_ARGUMENT error is returned.
+     * See [Using catalog
+     * levels](/retail/recommendations-ai/docs/catalog#catalog-levels) for more
+     * details.
+     * </pre>
+     *
+     * <code>string merchant_center_product_id_field = 2;</code>
+     *
+     * @return The merchantCenterProductIdField.
+     */
+    public java.lang.String getMerchantCenterProductIdField() {
+      java.lang.Object ref = merchantCenterProductIdField_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        merchantCenterProductIdField_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Which field of [Merchant Center
+     * Product](/bigquery-transfer/docs/merchant-center-products-schema) should be
+     * imported as [Product.id][google.cloud.retail.v2.Product.id]. Acceptable
+     * values are:
+     * * `offerId` (default): Import `offerId` as the product ID.
+     * * `itemGroupId`: Import `itemGroupId` as the product ID. Notice that Retail
+     *   API will choose one item from the ones with the same `itemGroupId`, and
+     *   use it to represent the item group.
+     * If this field is set to an invalid value other than these, an
+     * INVALID_ARGUMENT error is returned.
+     * If this field is `itemGroupId` and
+     * [ingestion_product_type][google.cloud.retail.v2.ProductLevelConfig.ingestion_product_type]
+     * is `variant`, an INVALID_ARGUMENT error is returned.
+     * See [Using catalog
+     * levels](/retail/recommendations-ai/docs/catalog#catalog-levels) for more
+     * details.
+     * </pre>
+     *
+     * <code>string merchant_center_product_id_field = 2;</code>
+     *
+     * @return The bytes for merchantCenterProductIdField.
+     */
+    public com.google.protobuf.ByteString getMerchantCenterProductIdFieldBytes() {
+      java.lang.Object ref = merchantCenterProductIdField_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b =
+            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+        merchantCenterProductIdField_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Which field of [Merchant Center
+     * Product](/bigquery-transfer/docs/merchant-center-products-schema) should be
+     * imported as [Product.id][google.cloud.retail.v2.Product.id]. Acceptable
+     * values are:
+     * * `offerId` (default): Import `offerId` as the product ID.
+     * * `itemGroupId`: Import `itemGroupId` as the product ID. Notice that Retail
+     *   API will choose one item from the ones with the same `itemGroupId`, and
+     *   use it to represent the item group.
+     * If this field is set to an invalid value other than these, an
+     * INVALID_ARGUMENT error is returned.
+     * If this field is `itemGroupId` and
+     * [ingestion_product_type][google.cloud.retail.v2.ProductLevelConfig.ingestion_product_type]
+     * is `variant`, an INVALID_ARGUMENT error is returned.
+     * See [Using catalog
+     * levels](/retail/recommendations-ai/docs/catalog#catalog-levels) for more
+     * details.
+     * </pre>
+     *
+     * <code>string merchant_center_product_id_field = 2;</code>
+     *
+     * @param value The merchantCenterProductIdField to set.
+     * @return This builder for chaining.
+     */
+    public Builder setMerchantCenterProductIdField(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+
+      merchantCenterProductIdField_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Which field of [Merchant Center
+     * Product](/bigquery-transfer/docs/merchant-center-products-schema) should be
+     * imported as [Product.id][google.cloud.retail.v2.Product.id]. Acceptable
+     * values are:
+     * * `offerId` (default): Import `offerId` as the product ID.
+     * * `itemGroupId`: Import `itemGroupId` as the product ID. Notice that Retail
+     *   API will choose one item from the ones with the same `itemGroupId`, and
+     *   use it to represent the item group.
+     * If this field is set to an invalid value other than these, an
+     * INVALID_ARGUMENT error is returned.
+     * If this field is `itemGroupId` and
+     * [ingestion_product_type][google.cloud.retail.v2.ProductLevelConfig.ingestion_product_type]
+     * is `variant`, an INVALID_ARGUMENT error is returned.
+     * See [Using catalog
+     * levels](/retail/recommendations-ai/docs/catalog#catalog-levels) for more
+     * details.
+     * </pre>
+     *
+     * <code>string merchant_center_product_id_field = 2;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearMerchantCenterProductIdField() {
+
+      merchantCenterProductIdField_ = getDefaultInstance().getMerchantCenterProductIdField();
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Which field of [Merchant Center
+     * Product](/bigquery-transfer/docs/merchant-center-products-schema) should be
+     * imported as [Product.id][google.cloud.retail.v2.Product.id]. Acceptable
+     * values are:
+     * * `offerId` (default): Import `offerId` as the product ID.
+     * * `itemGroupId`: Import `itemGroupId` as the product ID. Notice that Retail
+     *   API will choose one item from the ones with the same `itemGroupId`, and
+     *   use it to represent the item group.
+     * If this field is set to an invalid value other than these, an
+     * INVALID_ARGUMENT error is returned.
+     * If this field is `itemGroupId` and
+     * [ingestion_product_type][google.cloud.retail.v2.ProductLevelConfig.ingestion_product_type]
+     * is `variant`, an INVALID_ARGUMENT error is returned.
+     * See [Using catalog
+     * levels](/retail/recommendations-ai/docs/catalog#catalog-levels) for more
+     * details.
+     * </pre>
+     *
+     * <code>string merchant_center_product_id_field = 2;</code>
+     *
+     * @param value The bytes for merchantCenterProductIdField to set.
+     * @return This builder for chaining.
+     */
+    public Builder setMerchantCenterProductIdFieldBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+
+      merchantCenterProductIdField_ = value;
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.setUnknownFields(unknownFields);
+    }
+
+    @java.lang.Override
+    public final Builder mergeUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.mergeUnknownFields(unknownFields);
+    }
+
+    // @@protoc_insertion_point(builder_scope:google.cloud.retail.v2.ProductLevelConfig)
+  }
+
+  // @@protoc_insertion_point(class_scope:google.cloud.retail.v2.ProductLevelConfig)
+  private static final com.google.cloud.retail.v2.ProductLevelConfig DEFAULT_INSTANCE;
+
+  static {
+    DEFAULT_INSTANCE = new com.google.cloud.retail.v2.ProductLevelConfig();
+  }
+
+  public static com.google.cloud.retail.v2.ProductLevelConfig getDefaultInstance() {
+    return DEFAULT_INSTANCE;
+  }
+
+  private static final com.google.protobuf.Parser<ProductLevelConfig> PARSER =
+      new com.google.protobuf.AbstractParser<ProductLevelConfig>() {
+        @java.lang.Override
+        public ProductLevelConfig parsePartialFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws com.google.protobuf.InvalidProtocolBufferException {
+          return new ProductLevelConfig(input, extensionRegistry);
+        }
+      };
+
+  public static com.google.protobuf.Parser<ProductLevelConfig> parser() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.protobuf.Parser<ProductLevelConfig> getParserForType() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.cloud.retail.v2.ProductLevelConfig getDefaultInstanceForType() {
+    return DEFAULT_INSTANCE;
+  }
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ProductLevelConfigOrBuilder.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ProductLevelConfigOrBuilder.java
new file mode 100644
index 00000000..333d97f0
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ProductLevelConfigOrBuilder.java
@@ -0,0 +1,147 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/catalog.proto
+
+package com.google.cloud.retail.v2;
+
+public interface ProductLevelConfigOrBuilder
+    extends
+    // @@protoc_insertion_point(interface_extends:google.cloud.retail.v2.ProductLevelConfig)
+    com.google.protobuf.MessageOrBuilder {
+
+  /**
+   *
+   *
+   * <pre>
+   * The type of [Product][google.cloud.retail.v2.Product]s allowed to be
+   * ingested into the catalog. Acceptable values are:
+   * * `primary` (default): You can only ingest
+   * [Product.Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
+   *   [Product][google.cloud.retail.v2.Product]s. This means
+   *   [Product.primary_product_id][google.cloud.retail.v2.Product.primary_product_id]
+   *   can only be empty or set to the same value as
+   *   [Product.id][google.cloud.retail.v2.Product.id].
+   * * `variant`: You can only ingest
+   * [Product.Type.VARIANT][google.cloud.retail.v2.Product.Type.VARIANT]
+   * [Product][google.cloud.retail.v2.Product]s.
+   *   This means
+   *   [Product.primary_product_id][google.cloud.retail.v2.Product.primary_product_id]
+   *   cannot be empty.
+   * If this field is set to an invalid value other than these, an
+   * INVALID_ARGUMENT error is returned.
+   * If this field is `variant` and
+   * [merchant_center_product_id_field][google.cloud.retail.v2.ProductLevelConfig.merchant_center_product_id_field]
+   * is `itemGroupId`, an INVALID_ARGUMENT error is returned.
+   * See [Using catalog
+   * levels](/retail/recommendations-ai/docs/catalog#catalog-levels) for more
+   * details.
+   * </pre>
+   *
+   * <code>string ingestion_product_type = 1;</code>
+   *
+   * @return The ingestionProductType.
+   */
+  java.lang.String getIngestionProductType();
+  /**
+   *
+   *
+   * <pre>
+   * The type of [Product][google.cloud.retail.v2.Product]s allowed to be
+   * ingested into the catalog. Acceptable values are:
+   * * `primary` (default): You can only ingest
+   * [Product.Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
+   *   [Product][google.cloud.retail.v2.Product]s. This means
+   *   [Product.primary_product_id][google.cloud.retail.v2.Product.primary_product_id]
+   *   can only be empty or set to the same value as
+   *   [Product.id][google.cloud.retail.v2.Product.id].
+   * * `variant`: You can only ingest
+   * [Product.Type.VARIANT][google.cloud.retail.v2.Product.Type.VARIANT]
+   * [Product][google.cloud.retail.v2.Product]s.
+   *   This means
+   *   [Product.primary_product_id][google.cloud.retail.v2.Product.primary_product_id]
+   *   cannot be empty.
+   * If this field is set to an invalid value other than these, an
+   * INVALID_ARGUMENT error is returned.
+   * If this field is `variant` and
+   * [merchant_center_product_id_field][google.cloud.retail.v2.ProductLevelConfig.merchant_center_product_id_field]
+   * is `itemGroupId`, an INVALID_ARGUMENT error is returned.
+   * See [Using catalog
+   * levels](/retail/recommendations-ai/docs/catalog#catalog-levels) for more
+   * details.
+   * </pre>
+   *
+   * <code>string ingestion_product_type = 1;</code>
+   *
+   * @return The bytes for ingestionProductType.
+   */
+  com.google.protobuf.ByteString getIngestionProductTypeBytes();
+
+  /**
+   *
+   *
+   * <pre>
+   * Which field of [Merchant Center
+   * Product](/bigquery-transfer/docs/merchant-center-products-schema) should be
+   * imported as [Product.id][google.cloud.retail.v2.Product.id]. Acceptable
+   * values are:
+   * * `offerId` (default): Import `offerId` as the product ID.
+   * * `itemGroupId`: Import `itemGroupId` as the product ID. Notice that Retail
+   *   API will choose one item from the ones with the same `itemGroupId`, and
+   *   use it to represent the item group.
+   * If this field is set to an invalid value other than these, an
+   * INVALID_ARGUMENT error is returned.
+   * If this field is `itemGroupId` and
+   * [ingestion_product_type][google.cloud.retail.v2.ProductLevelConfig.ingestion_product_type]
+   * is `variant`, an INVALID_ARGUMENT error is returned.
+   * See [Using catalog
+   * levels](/retail/recommendations-ai/docs/catalog#catalog-levels) for more
+   * details.
+   * </pre>
+   *
+   * <code>string merchant_center_product_id_field = 2;</code>
+   *
+   * @return The merchantCenterProductIdField.
+   */
+  java.lang.String getMerchantCenterProductIdField();
+  /**
+   *
+   *
+   * <pre>
+   * Which field of [Merchant Center
+   * Product](/bigquery-transfer/docs/merchant-center-products-schema) should be
+   * imported as [Product.id][google.cloud.retail.v2.Product.id]. Acceptable
+   * values are:
+   * * `offerId` (default): Import `offerId` as the product ID.
+   * * `itemGroupId`: Import `itemGroupId` as the product ID. Notice that Retail
+   *   API will choose one item from the ones with the same `itemGroupId`, and
+   *   use it to represent the item group.
+   * If this field is set to an invalid value other than these, an
+   * INVALID_ARGUMENT error is returned.
+   * If this field is `itemGroupId` and
+   * [ingestion_product_type][google.cloud.retail.v2.ProductLevelConfig.ingestion_product_type]
+   * is `variant`, an INVALID_ARGUMENT error is returned.
+   * See [Using catalog
+   * levels](/retail/recommendations-ai/docs/catalog#catalog-levels) for more
+   * details.
+   * </pre>
+   *
+   * <code>string merchant_center_product_id_field = 2;</code>
+   *
+   * @return The bytes for merchantCenterProductIdField.
+   */
+  com.google.protobuf.ByteString getMerchantCenterProductIdFieldBytes();
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ProductName.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ProductName.java
new file mode 100644
index 00000000..7f2594e9
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ProductName.java
@@ -0,0 +1,298 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.cloud.retail.v2;
+
+import com.google.api.pathtemplate.PathTemplate;
+import com.google.api.resourcenames.ResourceName;
+import com.google.common.base.Preconditions;
+import com.google.common.collect.ImmutableMap;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import javax.annotation.Generated;
+
+// AUTO-GENERATED DOCUMENTATION AND CLASS.
+@Generated("by gapic-generator-java")
+public class ProductName implements ResourceName {
+  private static final PathTemplate PROJECT_LOCATION_CATALOG_BRANCH_PRODUCT =
+      PathTemplate.createWithoutUrlEncoding(
+          "projects/{project}/locations/{location}/catalogs/{catalog}/branches/{branch}/products/{product}");
+  private volatile Map<String, String> fieldValuesMap;
+  private final String project;
+  private final String location;
+  private final String catalog;
+  private final String branch;
+  private final String product;
+
+  @Deprecated
+  protected ProductName() {
+    project = null;
+    location = null;
+    catalog = null;
+    branch = null;
+    product = null;
+  }
+
+  private ProductName(Builder builder) {
+    project = Preconditions.checkNotNull(builder.getProject());
+    location = Preconditions.checkNotNull(builder.getLocation());
+    catalog = Preconditions.checkNotNull(builder.getCatalog());
+    branch = Preconditions.checkNotNull(builder.getBranch());
+    product = Preconditions.checkNotNull(builder.getProduct());
+  }
+
+  public String getProject() {
+    return project;
+  }
+
+  public String getLocation() {
+    return location;
+  }
+
+  public String getCatalog() {
+    return catalog;
+  }
+
+  public String getBranch() {
+    return branch;
+  }
+
+  public String getProduct() {
+    return product;
+  }
+
+  public static Builder newBuilder() {
+    return new Builder();
+  }
+
+  public Builder toBuilder() {
+    return new Builder(this);
+  }
+
+  public static ProductName of(
+      String project, String location, String catalog, String branch, String product) {
+    return newBuilder()
+        .setProject(project)
+        .setLocation(location)
+        .setCatalog(catalog)
+        .setBranch(branch)
+        .setProduct(product)
+        .build();
+  }
+
+  public static String format(
+      String project, String location, String catalog, String branch, String product) {
+    return newBuilder()
+        .setProject(project)
+        .setLocation(location)
+        .setCatalog(catalog)
+        .setBranch(branch)
+        .setProduct(product)
+        .build()
+        .toString();
+  }
+
+  public static ProductName parse(String formattedString) {
+    if (formattedString.isEmpty()) {
+      return null;
+    }
+    Map<String, String> matchMap =
+        PROJECT_LOCATION_CATALOG_BRANCH_PRODUCT.validatedMatch(
+            formattedString, "ProductName.parse: formattedString not in valid format");
+    return of(
+        matchMap.get("project"),
+        matchMap.get("location"),
+        matchMap.get("catalog"),
+        matchMap.get("branch"),
+        matchMap.get("product"));
+  }
+
+  public static List<ProductName> parseList(List<String> formattedStrings) {
+    List<ProductName> list = new ArrayList<>(formattedStrings.size());
+    for (String formattedString : formattedStrings) {
+      list.add(parse(formattedString));
+    }
+    return list;
+  }
+
+  public static List<String> toStringList(List<ProductName> values) {
+    List<String> list = new ArrayList<>(values.size());
+    for (ProductName value : values) {
+      if (value == null) {
+        list.add("");
+      } else {
+        list.add(value.toString());
+      }
+    }
+    return list;
+  }
+
+  public static boolean isParsableFrom(String formattedString) {
+    return PROJECT_LOCATION_CATALOG_BRANCH_PRODUCT.matches(formattedString);
+  }
+
+  @Override
+  public Map<String, String> getFieldValuesMap() {
+    if (fieldValuesMap == null) {
+      synchronized (this) {
+        if (fieldValuesMap == null) {
+          ImmutableMap.Builder<String, String> fieldMapBuilder = ImmutableMap.builder();
+          if (project != null) {
+            fieldMapBuilder.put("project", project);
+          }
+          if (location != null) {
+            fieldMapBuilder.put("location", location);
+          }
+          if (catalog != null) {
+            fieldMapBuilder.put("catalog", catalog);
+          }
+          if (branch != null) {
+            fieldMapBuilder.put("branch", branch);
+          }
+          if (product != null) {
+            fieldMapBuilder.put("product", product);
+          }
+          fieldValuesMap = fieldMapBuilder.build();
+        }
+      }
+    }
+    return fieldValuesMap;
+  }
+
+  public String getFieldValue(String fieldName) {
+    return getFieldValuesMap().get(fieldName);
+  }
+
+  @Override
+  public String toString() {
+    return PROJECT_LOCATION_CATALOG_BRANCH_PRODUCT.instantiate(
+        "project",
+        project,
+        "location",
+        location,
+        "catalog",
+        catalog,
+        "branch",
+        branch,
+        "product",
+        product);
+  }
+
+  @Override
+  public boolean equals(Object o) {
+    if (o == this) {
+      return true;
+    }
+    if (o != null || getClass() == o.getClass()) {
+      ProductName that = ((ProductName) o);
+      return Objects.equals(this.project, that.project)
+          && Objects.equals(this.location, that.location)
+          && Objects.equals(this.catalog, that.catalog)
+          && Objects.equals(this.branch, that.branch)
+          && Objects.equals(this.product, that.product);
+    }
+    return false;
+  }
+
+  @Override
+  public int hashCode() {
+    int h = 1;
+    h *= 1000003;
+    h ^= Objects.hashCode(project);
+    h *= 1000003;
+    h ^= Objects.hashCode(location);
+    h *= 1000003;
+    h ^= Objects.hashCode(catalog);
+    h *= 1000003;
+    h ^= Objects.hashCode(branch);
+    h *= 1000003;
+    h ^= Objects.hashCode(product);
+    return h;
+  }
+
+  /**
+   * Builder for
+   * projects/{project}/locations/{location}/catalogs/{catalog}/branches/{branch}/products/{product}.
+   */
+  public static class Builder {
+    private String project;
+    private String location;
+    private String catalog;
+    private String branch;
+    private String product;
+
+    protected Builder() {}
+
+    public String getProject() {
+      return project;
+    }
+
+    public String getLocation() {
+      return location;
+    }
+
+    public String getCatalog() {
+      return catalog;
+    }
+
+    public String getBranch() {
+      return branch;
+    }
+
+    public String getProduct() {
+      return product;
+    }
+
+    public Builder setProject(String project) {
+      this.project = project;
+      return this;
+    }
+
+    public Builder setLocation(String location) {
+      this.location = location;
+      return this;
+    }
+
+    public Builder setCatalog(String catalog) {
+      this.catalog = catalog;
+      return this;
+    }
+
+    public Builder setBranch(String branch) {
+      this.branch = branch;
+      return this;
+    }
+
+    public Builder setProduct(String product) {
+      this.product = product;
+      return this;
+    }
+
+    private Builder(ProductName productName) {
+      project = productName.project;
+      location = productName.location;
+      catalog = productName.catalog;
+      branch = productName.branch;
+      product = productName.product;
+    }
+
+    public ProductName build() {
+      return new ProductName(this);
+    }
+  }
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ProductOrBuilder.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ProductOrBuilder.java
new file mode 100644
index 00000000..08ff517b
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ProductOrBuilder.java
@@ -0,0 +1,874 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/product.proto
+
+package com.google.cloud.retail.v2;
+
+public interface ProductOrBuilder
+    extends
+    // @@protoc_insertion_point(interface_extends:google.cloud.retail.v2.Product)
+    com.google.protobuf.MessageOrBuilder {
+
+  /**
+   *
+   *
+   * <pre>
+   * Immutable. Full resource name of the product, such as
+   * "projects/&#42;&#47;locations/global/catalogs/default_catalog/branches/default_branch/products/product_id".
+   * The branch ID must be "default_branch".
+   * </pre>
+   *
+   * <code>string name = 1 [(.google.api.field_behavior) = IMMUTABLE];</code>
+   *
+   * @return The name.
+   */
+  java.lang.String getName();
+  /**
+   *
+   *
+   * <pre>
+   * Immutable. Full resource name of the product, such as
+   * "projects/&#42;&#47;locations/global/catalogs/default_catalog/branches/default_branch/products/product_id".
+   * The branch ID must be "default_branch".
+   * </pre>
+   *
+   * <code>string name = 1 [(.google.api.field_behavior) = IMMUTABLE];</code>
+   *
+   * @return The bytes for name.
+   */
+  com.google.protobuf.ByteString getNameBytes();
+
+  /**
+   *
+   *
+   * <pre>
+   * Immutable. [Product][google.cloud.retail.v2.Product] identifier, which is
+   * the final component of [name][google.cloud.retail.v2.Product.name]. For
+   * example, this field is "id_1", if
+   * [name][google.cloud.retail.v2.Product.name] is
+   * "projects/&#42;&#47;locations/global/catalogs/default_catalog/branches/default_branch/products/id_1".
+   * This field must be a UTF-8 encoded string with a length limit of 128
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * Google Merchant Center property
+   * [id](https://support.google.com/merchants/answer/6324405). Schema.org
+   * Property [Product.sku](https://schema.org/sku).
+   * </pre>
+   *
+   * <code>string id = 2 [(.google.api.field_behavior) = IMMUTABLE];</code>
+   *
+   * @return The id.
+   */
+  java.lang.String getId();
+  /**
+   *
+   *
+   * <pre>
+   * Immutable. [Product][google.cloud.retail.v2.Product] identifier, which is
+   * the final component of [name][google.cloud.retail.v2.Product.name]. For
+   * example, this field is "id_1", if
+   * [name][google.cloud.retail.v2.Product.name] is
+   * "projects/&#42;&#47;locations/global/catalogs/default_catalog/branches/default_branch/products/id_1".
+   * This field must be a UTF-8 encoded string with a length limit of 128
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * Google Merchant Center property
+   * [id](https://support.google.com/merchants/answer/6324405). Schema.org
+   * Property [Product.sku](https://schema.org/sku).
+   * </pre>
+   *
+   * <code>string id = 2 [(.google.api.field_behavior) = IMMUTABLE];</code>
+   *
+   * @return The bytes for id.
+   */
+  com.google.protobuf.ByteString getIdBytes();
+
+  /**
+   *
+   *
+   * <pre>
+   * Immutable. The type of the product. This field is output-only.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.Product.Type type = 3 [(.google.api.field_behavior) = IMMUTABLE];
+   * </code>
+   *
+   * @return The enum numeric value on the wire for type.
+   */
+  int getTypeValue();
+  /**
+   *
+   *
+   * <pre>
+   * Immutable. The type of the product. This field is output-only.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.Product.Type type = 3 [(.google.api.field_behavior) = IMMUTABLE];
+   * </code>
+   *
+   * @return The type.
+   */
+  com.google.cloud.retail.v2.Product.Type getType();
+
+  /**
+   *
+   *
+   * <pre>
+   * Variant group identifier. Must be an
+   * [id][google.cloud.retail.v2.Product.id], with the same parent branch with
+   * this product. Otherwise, an error is thrown.
+   * For [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
+   * [Product][google.cloud.retail.v2.Product]s, this field can only be empty or
+   * set to the same value as [id][google.cloud.retail.v2.Product.id].
+   * For VARIANT [Product][google.cloud.retail.v2.Product]s, this field cannot
+   * be empty. A maximum of 2,000 products are allowed to share the same
+   * [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
+   * [Product][google.cloud.retail.v2.Product]. Otherwise, an INVALID_ARGUMENT
+   * error is returned.
+   * Google Merchant Center Property
+   * [item_group_id](https://support.google.com/merchants/answer/6324507).
+   * Schema.org Property
+   * [Product.inProductGroupWithID](https://schema.org/inProductGroupWithID).
+   * This field must be enabled before it can be used. [Learn
+   * more](/recommendations-ai/docs/catalog#item-group-id).
+   * </pre>
+   *
+   * <code>string primary_product_id = 4;</code>
+   *
+   * @return The primaryProductId.
+   */
+  java.lang.String getPrimaryProductId();
+  /**
+   *
+   *
+   * <pre>
+   * Variant group identifier. Must be an
+   * [id][google.cloud.retail.v2.Product.id], with the same parent branch with
+   * this product. Otherwise, an error is thrown.
+   * For [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
+   * [Product][google.cloud.retail.v2.Product]s, this field can only be empty or
+   * set to the same value as [id][google.cloud.retail.v2.Product.id].
+   * For VARIANT [Product][google.cloud.retail.v2.Product]s, this field cannot
+   * be empty. A maximum of 2,000 products are allowed to share the same
+   * [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
+   * [Product][google.cloud.retail.v2.Product]. Otherwise, an INVALID_ARGUMENT
+   * error is returned.
+   * Google Merchant Center Property
+   * [item_group_id](https://support.google.com/merchants/answer/6324507).
+   * Schema.org Property
+   * [Product.inProductGroupWithID](https://schema.org/inProductGroupWithID).
+   * This field must be enabled before it can be used. [Learn
+   * more](/recommendations-ai/docs/catalog#item-group-id).
+   * </pre>
+   *
+   * <code>string primary_product_id = 4;</code>
+   *
+   * @return The bytes for primaryProductId.
+   */
+  com.google.protobuf.ByteString getPrimaryProductIdBytes();
+
+  /**
+   *
+   *
+   * <pre>
+   * Product categories. This field is repeated for supporting one product
+   * belonging to several parallel categories. Strongly recommended using the
+   * full path for better search / recommendation quality.
+   * To represent full path of category, use '&gt;' sign to separate different
+   * hierarchies. If '&gt;' is part of the category name, please replace it with
+   * other character(s).
+   * For example, if a shoes product belongs to both
+   * ["Shoes &amp; Accessories" -&gt; "Shoes"] and
+   * ["Sports &amp; Fitness" -&gt; "Athletic Clothing" -&gt; "Shoes"], it could be
+   * represented as:
+   *      "categories": [
+   *        "Shoes &amp; Accessories &gt; Shoes",
+   *        "Sports &amp; Fitness &gt; Athletic Clothing &gt; Shoes"
+   *      ]
+   * Must be set for [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
+   * [Product][google.cloud.retail.v2.Product] otherwise an INVALID_ARGUMENT
+   * error is returned.
+   * At most 250 values are allowed per
+   * [Product][google.cloud.retail.v2.Product]. Empty values are not allowed.
+   * Each value must be a UTF-8 encoded string with a length limit of 5,000
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * Google Merchant Center property
+   * [google_product_category][mc_google_product_category]. Schema.org property
+   * [Product.category] (https://schema.org/category).
+   * [mc_google_product_category]:
+   * https://support.google.com/merchants/answer/6324436
+   * </pre>
+   *
+   * <code>repeated string categories = 7;</code>
+   *
+   * @return A list containing the categories.
+   */
+  java.util.List<java.lang.String> getCategoriesList();
+  /**
+   *
+   *
+   * <pre>
+   * Product categories. This field is repeated for supporting one product
+   * belonging to several parallel categories. Strongly recommended using the
+   * full path for better search / recommendation quality.
+   * To represent full path of category, use '&gt;' sign to separate different
+   * hierarchies. If '&gt;' is part of the category name, please replace it with
+   * other character(s).
+   * For example, if a shoes product belongs to both
+   * ["Shoes &amp; Accessories" -&gt; "Shoes"] and
+   * ["Sports &amp; Fitness" -&gt; "Athletic Clothing" -&gt; "Shoes"], it could be
+   * represented as:
+   *      "categories": [
+   *        "Shoes &amp; Accessories &gt; Shoes",
+   *        "Sports &amp; Fitness &gt; Athletic Clothing &gt; Shoes"
+   *      ]
+   * Must be set for [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
+   * [Product][google.cloud.retail.v2.Product] otherwise an INVALID_ARGUMENT
+   * error is returned.
+   * At most 250 values are allowed per
+   * [Product][google.cloud.retail.v2.Product]. Empty values are not allowed.
+   * Each value must be a UTF-8 encoded string with a length limit of 5,000
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * Google Merchant Center property
+   * [google_product_category][mc_google_product_category]. Schema.org property
+   * [Product.category] (https://schema.org/category).
+   * [mc_google_product_category]:
+   * https://support.google.com/merchants/answer/6324436
+   * </pre>
+   *
+   * <code>repeated string categories = 7;</code>
+   *
+   * @return The count of categories.
+   */
+  int getCategoriesCount();
+  /**
+   *
+   *
+   * <pre>
+   * Product categories. This field is repeated for supporting one product
+   * belonging to several parallel categories. Strongly recommended using the
+   * full path for better search / recommendation quality.
+   * To represent full path of category, use '&gt;' sign to separate different
+   * hierarchies. If '&gt;' is part of the category name, please replace it with
+   * other character(s).
+   * For example, if a shoes product belongs to both
+   * ["Shoes &amp; Accessories" -&gt; "Shoes"] and
+   * ["Sports &amp; Fitness" -&gt; "Athletic Clothing" -&gt; "Shoes"], it could be
+   * represented as:
+   *      "categories": [
+   *        "Shoes &amp; Accessories &gt; Shoes",
+   *        "Sports &amp; Fitness &gt; Athletic Clothing &gt; Shoes"
+   *      ]
+   * Must be set for [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
+   * [Product][google.cloud.retail.v2.Product] otherwise an INVALID_ARGUMENT
+   * error is returned.
+   * At most 250 values are allowed per
+   * [Product][google.cloud.retail.v2.Product]. Empty values are not allowed.
+   * Each value must be a UTF-8 encoded string with a length limit of 5,000
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * Google Merchant Center property
+   * [google_product_category][mc_google_product_category]. Schema.org property
+   * [Product.category] (https://schema.org/category).
+   * [mc_google_product_category]:
+   * https://support.google.com/merchants/answer/6324436
+   * </pre>
+   *
+   * <code>repeated string categories = 7;</code>
+   *
+   * @param index The index of the element to return.
+   * @return The categories at the given index.
+   */
+  java.lang.String getCategories(int index);
+  /**
+   *
+   *
+   * <pre>
+   * Product categories. This field is repeated for supporting one product
+   * belonging to several parallel categories. Strongly recommended using the
+   * full path for better search / recommendation quality.
+   * To represent full path of category, use '&gt;' sign to separate different
+   * hierarchies. If '&gt;' is part of the category name, please replace it with
+   * other character(s).
+   * For example, if a shoes product belongs to both
+   * ["Shoes &amp; Accessories" -&gt; "Shoes"] and
+   * ["Sports &amp; Fitness" -&gt; "Athletic Clothing" -&gt; "Shoes"], it could be
+   * represented as:
+   *      "categories": [
+   *        "Shoes &amp; Accessories &gt; Shoes",
+   *        "Sports &amp; Fitness &gt; Athletic Clothing &gt; Shoes"
+   *      ]
+   * Must be set for [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
+   * [Product][google.cloud.retail.v2.Product] otherwise an INVALID_ARGUMENT
+   * error is returned.
+   * At most 250 values are allowed per
+   * [Product][google.cloud.retail.v2.Product]. Empty values are not allowed.
+   * Each value must be a UTF-8 encoded string with a length limit of 5,000
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * Google Merchant Center property
+   * [google_product_category][mc_google_product_category]. Schema.org property
+   * [Product.category] (https://schema.org/category).
+   * [mc_google_product_category]:
+   * https://support.google.com/merchants/answer/6324436
+   * </pre>
+   *
+   * <code>repeated string categories = 7;</code>
+   *
+   * @param index The index of the value to return.
+   * @return The bytes of the categories at the given index.
+   */
+  com.google.protobuf.ByteString getCategoriesBytes(int index);
+
+  /**
+   *
+   *
+   * <pre>
+   * Required. Product title.
+   * This field must be a UTF-8 encoded string with a length limit of 128
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * Google Merchant Center property
+   * [title](https://support.google.com/merchants/answer/6324415). Schema.org
+   * property [Product.name](https://schema.org/name).
+   * </pre>
+   *
+   * <code>string title = 8 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The title.
+   */
+  java.lang.String getTitle();
+  /**
+   *
+   *
+   * <pre>
+   * Required. Product title.
+   * This field must be a UTF-8 encoded string with a length limit of 128
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * Google Merchant Center property
+   * [title](https://support.google.com/merchants/answer/6324415). Schema.org
+   * property [Product.name](https://schema.org/name).
+   * </pre>
+   *
+   * <code>string title = 8 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The bytes for title.
+   */
+  com.google.protobuf.ByteString getTitleBytes();
+
+  /**
+   *
+   *
+   * <pre>
+   * Product description.
+   * This field must be a UTF-8 encoded string with a length limit of 5,000
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * Google Merchant Center property
+   * [description](https://support.google.com/merchants/answer/6324468).
+   * schema.org property [Product.description](https://schema.org/description).
+   * </pre>
+   *
+   * <code>string description = 10;</code>
+   *
+   * @return The description.
+   */
+  java.lang.String getDescription();
+  /**
+   *
+   *
+   * <pre>
+   * Product description.
+   * This field must be a UTF-8 encoded string with a length limit of 5,000
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * Google Merchant Center property
+   * [description](https://support.google.com/merchants/answer/6324468).
+   * schema.org property [Product.description](https://schema.org/description).
+   * </pre>
+   *
+   * <code>string description = 10;</code>
+   *
+   * @return The bytes for description.
+   */
+  com.google.protobuf.ByteString getDescriptionBytes();
+
+  /**
+   *
+   *
+   * <pre>
+   * Highly encouraged. Extra product attributes to be included. For example,
+   * for products, this could include the store name, vendor, style, color, etc.
+   * These are very strong signals for recommendation model, thus we highly
+   * recommend providing the attributes here.
+   * Features that can take on one of a limited number of possible values. Two
+   * types of features can be set are:
+   * Textual features. some examples would be the brand/maker of a product, or
+   * country of a customer. Numerical features. Some examples would be the
+   * height/weight of a product, or age of a customer.
+   * For example: `{ "vendor": {"text": ["vendor123", "vendor456"]},
+   * "lengths_cm": {"numbers":[2.3, 15.4]}, "heights_cm": {"numbers":[8.1, 6.4]}
+   * }`.
+   * A maximum of 150 attributes are allowed. Otherwise, an INVALID_ARGUMENT
+   * error is returned.
+   * The key must be a UTF-8 encoded string with a length limit of 5,000
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * </pre>
+   *
+   * <code>map&lt;string, .google.cloud.retail.v2.CustomAttribute&gt; attributes = 12;</code>
+   */
+  int getAttributesCount();
+  /**
+   *
+   *
+   * <pre>
+   * Highly encouraged. Extra product attributes to be included. For example,
+   * for products, this could include the store name, vendor, style, color, etc.
+   * These are very strong signals for recommendation model, thus we highly
+   * recommend providing the attributes here.
+   * Features that can take on one of a limited number of possible values. Two
+   * types of features can be set are:
+   * Textual features. some examples would be the brand/maker of a product, or
+   * country of a customer. Numerical features. Some examples would be the
+   * height/weight of a product, or age of a customer.
+   * For example: `{ "vendor": {"text": ["vendor123", "vendor456"]},
+   * "lengths_cm": {"numbers":[2.3, 15.4]}, "heights_cm": {"numbers":[8.1, 6.4]}
+   * }`.
+   * A maximum of 150 attributes are allowed. Otherwise, an INVALID_ARGUMENT
+   * error is returned.
+   * The key must be a UTF-8 encoded string with a length limit of 5,000
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * </pre>
+   *
+   * <code>map&lt;string, .google.cloud.retail.v2.CustomAttribute&gt; attributes = 12;</code>
+   */
+  boolean containsAttributes(java.lang.String key);
+  /** Use {@link #getAttributesMap()} instead. */
+  @java.lang.Deprecated
+  java.util.Map<java.lang.String, com.google.cloud.retail.v2.CustomAttribute> getAttributes();
+  /**
+   *
+   *
+   * <pre>
+   * Highly encouraged. Extra product attributes to be included. For example,
+   * for products, this could include the store name, vendor, style, color, etc.
+   * These are very strong signals for recommendation model, thus we highly
+   * recommend providing the attributes here.
+   * Features that can take on one of a limited number of possible values. Two
+   * types of features can be set are:
+   * Textual features. some examples would be the brand/maker of a product, or
+   * country of a customer. Numerical features. Some examples would be the
+   * height/weight of a product, or age of a customer.
+   * For example: `{ "vendor": {"text": ["vendor123", "vendor456"]},
+   * "lengths_cm": {"numbers":[2.3, 15.4]}, "heights_cm": {"numbers":[8.1, 6.4]}
+   * }`.
+   * A maximum of 150 attributes are allowed. Otherwise, an INVALID_ARGUMENT
+   * error is returned.
+   * The key must be a UTF-8 encoded string with a length limit of 5,000
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * </pre>
+   *
+   * <code>map&lt;string, .google.cloud.retail.v2.CustomAttribute&gt; attributes = 12;</code>
+   */
+  java.util.Map<java.lang.String, com.google.cloud.retail.v2.CustomAttribute> getAttributesMap();
+  /**
+   *
+   *
+   * <pre>
+   * Highly encouraged. Extra product attributes to be included. For example,
+   * for products, this could include the store name, vendor, style, color, etc.
+   * These are very strong signals for recommendation model, thus we highly
+   * recommend providing the attributes here.
+   * Features that can take on one of a limited number of possible values. Two
+   * types of features can be set are:
+   * Textual features. some examples would be the brand/maker of a product, or
+   * country of a customer. Numerical features. Some examples would be the
+   * height/weight of a product, or age of a customer.
+   * For example: `{ "vendor": {"text": ["vendor123", "vendor456"]},
+   * "lengths_cm": {"numbers":[2.3, 15.4]}, "heights_cm": {"numbers":[8.1, 6.4]}
+   * }`.
+   * A maximum of 150 attributes are allowed. Otherwise, an INVALID_ARGUMENT
+   * error is returned.
+   * The key must be a UTF-8 encoded string with a length limit of 5,000
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * </pre>
+   *
+   * <code>map&lt;string, .google.cloud.retail.v2.CustomAttribute&gt; attributes = 12;</code>
+   */
+  com.google.cloud.retail.v2.CustomAttribute getAttributesOrDefault(
+      java.lang.String key, com.google.cloud.retail.v2.CustomAttribute defaultValue);
+  /**
+   *
+   *
+   * <pre>
+   * Highly encouraged. Extra product attributes to be included. For example,
+   * for products, this could include the store name, vendor, style, color, etc.
+   * These are very strong signals for recommendation model, thus we highly
+   * recommend providing the attributes here.
+   * Features that can take on one of a limited number of possible values. Two
+   * types of features can be set are:
+   * Textual features. some examples would be the brand/maker of a product, or
+   * country of a customer. Numerical features. Some examples would be the
+   * height/weight of a product, or age of a customer.
+   * For example: `{ "vendor": {"text": ["vendor123", "vendor456"]},
+   * "lengths_cm": {"numbers":[2.3, 15.4]}, "heights_cm": {"numbers":[8.1, 6.4]}
+   * }`.
+   * A maximum of 150 attributes are allowed. Otherwise, an INVALID_ARGUMENT
+   * error is returned.
+   * The key must be a UTF-8 encoded string with a length limit of 5,000
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * </pre>
+   *
+   * <code>map&lt;string, .google.cloud.retail.v2.CustomAttribute&gt; attributes = 12;</code>
+   */
+  com.google.cloud.retail.v2.CustomAttribute getAttributesOrThrow(java.lang.String key);
+
+  /**
+   *
+   *
+   * <pre>
+   * Custom tags associated with the product.
+   * At most 250 values are allowed per
+   * [Product][google.cloud.retail.v2.Product]. This value must be a UTF-8
+   * encoded string with a length limit of 1,000 characters. Otherwise, an
+   * INVALID_ARGUMENT error is returned.
+   * This tag can be used for filtering recommendation results by passing the
+   * tag as part of the
+   * [PredictRequest.filter][google.cloud.retail.v2.PredictRequest.filter].
+   * Google Merchant Center property
+   * [custom_label_0–4](https://support.google.com/merchants/answer/6324473).
+   * </pre>
+   *
+   * <code>repeated string tags = 13;</code>
+   *
+   * @return A list containing the tags.
+   */
+  java.util.List<java.lang.String> getTagsList();
+  /**
+   *
+   *
+   * <pre>
+   * Custom tags associated with the product.
+   * At most 250 values are allowed per
+   * [Product][google.cloud.retail.v2.Product]. This value must be a UTF-8
+   * encoded string with a length limit of 1,000 characters. Otherwise, an
+   * INVALID_ARGUMENT error is returned.
+   * This tag can be used for filtering recommendation results by passing the
+   * tag as part of the
+   * [PredictRequest.filter][google.cloud.retail.v2.PredictRequest.filter].
+   * Google Merchant Center property
+   * [custom_label_0–4](https://support.google.com/merchants/answer/6324473).
+   * </pre>
+   *
+   * <code>repeated string tags = 13;</code>
+   *
+   * @return The count of tags.
+   */
+  int getTagsCount();
+  /**
+   *
+   *
+   * <pre>
+   * Custom tags associated with the product.
+   * At most 250 values are allowed per
+   * [Product][google.cloud.retail.v2.Product]. This value must be a UTF-8
+   * encoded string with a length limit of 1,000 characters. Otherwise, an
+   * INVALID_ARGUMENT error is returned.
+   * This tag can be used for filtering recommendation results by passing the
+   * tag as part of the
+   * [PredictRequest.filter][google.cloud.retail.v2.PredictRequest.filter].
+   * Google Merchant Center property
+   * [custom_label_0–4](https://support.google.com/merchants/answer/6324473).
+   * </pre>
+   *
+   * <code>repeated string tags = 13;</code>
+   *
+   * @param index The index of the element to return.
+   * @return The tags at the given index.
+   */
+  java.lang.String getTags(int index);
+  /**
+   *
+   *
+   * <pre>
+   * Custom tags associated with the product.
+   * At most 250 values are allowed per
+   * [Product][google.cloud.retail.v2.Product]. This value must be a UTF-8
+   * encoded string with a length limit of 1,000 characters. Otherwise, an
+   * INVALID_ARGUMENT error is returned.
+   * This tag can be used for filtering recommendation results by passing the
+   * tag as part of the
+   * [PredictRequest.filter][google.cloud.retail.v2.PredictRequest.filter].
+   * Google Merchant Center property
+   * [custom_label_0–4](https://support.google.com/merchants/answer/6324473).
+   * </pre>
+   *
+   * <code>repeated string tags = 13;</code>
+   *
+   * @param index The index of the value to return.
+   * @return The bytes of the tags at the given index.
+   */
+  com.google.protobuf.ByteString getTagsBytes(int index);
+
+  /**
+   *
+   *
+   * <pre>
+   * Product price and cost information.
+   * Google Merchant Center property
+   * [price](https://support.google.com/merchants/answer/6324371).
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.PriceInfo price_info = 14;</code>
+   *
+   * @return Whether the priceInfo field is set.
+   */
+  boolean hasPriceInfo();
+  /**
+   *
+   *
+   * <pre>
+   * Product price and cost information.
+   * Google Merchant Center property
+   * [price](https://support.google.com/merchants/answer/6324371).
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.PriceInfo price_info = 14;</code>
+   *
+   * @return The priceInfo.
+   */
+  com.google.cloud.retail.v2.PriceInfo getPriceInfo();
+  /**
+   *
+   *
+   * <pre>
+   * Product price and cost information.
+   * Google Merchant Center property
+   * [price](https://support.google.com/merchants/answer/6324371).
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.PriceInfo price_info = 14;</code>
+   */
+  com.google.cloud.retail.v2.PriceInfoOrBuilder getPriceInfoOrBuilder();
+
+  /**
+   *
+   *
+   * <pre>
+   * The timestamp when this [Product][google.cloud.retail.v2.Product] becomes
+   * available recommendation and search.
+   * </pre>
+   *
+   * <code>.google.protobuf.Timestamp available_time = 18;</code>
+   *
+   * @return Whether the availableTime field is set.
+   */
+  boolean hasAvailableTime();
+  /**
+   *
+   *
+   * <pre>
+   * The timestamp when this [Product][google.cloud.retail.v2.Product] becomes
+   * available recommendation and search.
+   * </pre>
+   *
+   * <code>.google.protobuf.Timestamp available_time = 18;</code>
+   *
+   * @return The availableTime.
+   */
+  com.google.protobuf.Timestamp getAvailableTime();
+  /**
+   *
+   *
+   * <pre>
+   * The timestamp when this [Product][google.cloud.retail.v2.Product] becomes
+   * available recommendation and search.
+   * </pre>
+   *
+   * <code>.google.protobuf.Timestamp available_time = 18;</code>
+   */
+  com.google.protobuf.TimestampOrBuilder getAvailableTimeOrBuilder();
+
+  /**
+   *
+   *
+   * <pre>
+   * The online availability of the [Product][google.cloud.retail.v2.Product].
+   * Default to
+   * [Availability.IN_STOCK][google.cloud.retail.v2.Product.Availability.IN_STOCK].
+   * Google Merchant Center Property
+   * [availability](https://support.google.com/merchants/answer/6324448).
+   * Schema.org Property [Offer.availability](https://schema.org/availability).
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.Product.Availability availability = 19;</code>
+   *
+   * @return The enum numeric value on the wire for availability.
+   */
+  int getAvailabilityValue();
+  /**
+   *
+   *
+   * <pre>
+   * The online availability of the [Product][google.cloud.retail.v2.Product].
+   * Default to
+   * [Availability.IN_STOCK][google.cloud.retail.v2.Product.Availability.IN_STOCK].
+   * Google Merchant Center Property
+   * [availability](https://support.google.com/merchants/answer/6324448).
+   * Schema.org Property [Offer.availability](https://schema.org/availability).
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.Product.Availability availability = 19;</code>
+   *
+   * @return The availability.
+   */
+  com.google.cloud.retail.v2.Product.Availability getAvailability();
+
+  /**
+   *
+   *
+   * <pre>
+   * The available quantity of the item.
+   * </pre>
+   *
+   * <code>.google.protobuf.Int32Value available_quantity = 20;</code>
+   *
+   * @return Whether the availableQuantity field is set.
+   */
+  boolean hasAvailableQuantity();
+  /**
+   *
+   *
+   * <pre>
+   * The available quantity of the item.
+   * </pre>
+   *
+   * <code>.google.protobuf.Int32Value available_quantity = 20;</code>
+   *
+   * @return The availableQuantity.
+   */
+  com.google.protobuf.Int32Value getAvailableQuantity();
+  /**
+   *
+   *
+   * <pre>
+   * The available quantity of the item.
+   * </pre>
+   *
+   * <code>.google.protobuf.Int32Value available_quantity = 20;</code>
+   */
+  com.google.protobuf.Int32ValueOrBuilder getAvailableQuantityOrBuilder();
+
+  /**
+   *
+   *
+   * <pre>
+   * Canonical URL directly linking to the product detail page.
+   * This field must be a UTF-8 encoded string with a length limit of 5,000
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * Google Merchant Center property
+   * [link](https://support.google.com/merchants/answer/6324416). Schema.org
+   * property [Offer.url](https://schema.org/url).
+   * </pre>
+   *
+   * <code>string uri = 22;</code>
+   *
+   * @return The uri.
+   */
+  java.lang.String getUri();
+  /**
+   *
+   *
+   * <pre>
+   * Canonical URL directly linking to the product detail page.
+   * This field must be a UTF-8 encoded string with a length limit of 5,000
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * Google Merchant Center property
+   * [link](https://support.google.com/merchants/answer/6324416). Schema.org
+   * property [Offer.url](https://schema.org/url).
+   * </pre>
+   *
+   * <code>string uri = 22;</code>
+   *
+   * @return The bytes for uri.
+   */
+  com.google.protobuf.ByteString getUriBytes();
+
+  /**
+   *
+   *
+   * <pre>
+   * Product images for the product.
+   * A maximum of 300 images are allowed.
+   * Google Merchant Center property
+   * [image_link](https://support.google.com/merchants/answer/6324350).
+   * Schema.org property [Product.image](https://schema.org/image).
+   * </pre>
+   *
+   * <code>repeated .google.cloud.retail.v2.Image images = 23;</code>
+   */
+  java.util.List<com.google.cloud.retail.v2.Image> getImagesList();
+  /**
+   *
+   *
+   * <pre>
+   * Product images for the product.
+   * A maximum of 300 images are allowed.
+   * Google Merchant Center property
+   * [image_link](https://support.google.com/merchants/answer/6324350).
+   * Schema.org property [Product.image](https://schema.org/image).
+   * </pre>
+   *
+   * <code>repeated .google.cloud.retail.v2.Image images = 23;</code>
+   */
+  com.google.cloud.retail.v2.Image getImages(int index);
+  /**
+   *
+   *
+   * <pre>
+   * Product images for the product.
+   * A maximum of 300 images are allowed.
+   * Google Merchant Center property
+   * [image_link](https://support.google.com/merchants/answer/6324350).
+   * Schema.org property [Product.image](https://schema.org/image).
+   * </pre>
+   *
+   * <code>repeated .google.cloud.retail.v2.Image images = 23;</code>
+   */
+  int getImagesCount();
+  /**
+   *
+   *
+   * <pre>
+   * Product images for the product.
+   * A maximum of 300 images are allowed.
+   * Google Merchant Center property
+   * [image_link](https://support.google.com/merchants/answer/6324350).
+   * Schema.org property [Product.image](https://schema.org/image).
+   * </pre>
+   *
+   * <code>repeated .google.cloud.retail.v2.Image images = 23;</code>
+   */
+  java.util.List<? extends com.google.cloud.retail.v2.ImageOrBuilder> getImagesOrBuilderList();
+  /**
+   *
+   *
+   * <pre>
+   * Product images for the product.
+   * A maximum of 300 images are allowed.
+   * Google Merchant Center property
+   * [image_link](https://support.google.com/merchants/answer/6324350).
+   * Schema.org property [Product.image](https://schema.org/image).
+   * </pre>
+   *
+   * <code>repeated .google.cloud.retail.v2.Image images = 23;</code>
+   */
+  com.google.cloud.retail.v2.ImageOrBuilder getImagesOrBuilder(int index);
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ProductProto.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ProductProto.java
new file mode 100644
index 00000000..55d05752
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ProductProto.java
@@ -0,0 +1,147 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/product.proto
+
+package com.google.cloud.retail.v2;
+
+public final class ProductProto {
+  private ProductProto() {}
+
+  public static void registerAllExtensions(com.google.protobuf.ExtensionRegistryLite registry) {}
+
+  public static void registerAllExtensions(com.google.protobuf.ExtensionRegistry registry) {
+    registerAllExtensions((com.google.protobuf.ExtensionRegistryLite) registry);
+  }
+
+  static final com.google.protobuf.Descriptors.Descriptor
+      internal_static_google_cloud_retail_v2_Product_descriptor;
+  static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_google_cloud_retail_v2_Product_fieldAccessorTable;
+  static final com.google.protobuf.Descriptors.Descriptor
+      internal_static_google_cloud_retail_v2_Product_AttributesEntry_descriptor;
+  static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_google_cloud_retail_v2_Product_AttributesEntry_fieldAccessorTable;
+
+  public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
+    return descriptor;
+  }
+
+  private static com.google.protobuf.Descriptors.FileDescriptor descriptor;
+
+  static {
+    java.lang.String[] descriptorData = {
+      "\n$google/cloud/retail/v2/product.proto\022\026"
+          + "google.cloud.retail.v2\032\034google/api/annot"
+          + "ations.proto\032\037google/api/field_behavior."
+          + "proto\032\031google/api/resource.proto\032#google"
+          + "/cloud/retail/v2/common.proto\032 google/pr"
+          + "otobuf/field_mask.proto\032\037google/protobuf"
+          + "/timestamp.proto\032\036google/protobuf/wrappe"
+          + "rs.proto\"\314\007\n\007Product\022\021\n\004name\030\001 \001(\tB\003\340A\005\022"
+          + "\017\n\002id\030\002 \001(\tB\003\340A\005\0227\n\004type\030\003 \001(\0162$.google."
+          + "cloud.retail.v2.Product.TypeB\003\340A\005\022\032\n\022pri"
+          + "mary_product_id\030\004 \001(\t\022\022\n\ncategories\030\007 \003("
+          + "\t\022\022\n\005title\030\010 \001(\tB\003\340A\002\022\023\n\013description\030\n \001"
+          + "(\t\022C\n\nattributes\030\014 \003(\0132/.google.cloud.re"
+          + "tail.v2.Product.AttributesEntry\022\014\n\004tags\030"
+          + "\r \003(\t\0225\n\nprice_info\030\016 \001(\0132!.google.cloud"
+          + ".retail.v2.PriceInfo\0222\n\016available_time\030\022"
+          + " \001(\0132\032.google.protobuf.Timestamp\022B\n\014avai"
+          + "lability\030\023 \001(\0162,.google.cloud.retail.v2."
+          + "Product.Availability\0227\n\022available_quanti"
+          + "ty\030\024 \001(\0132\033.google.protobuf.Int32Value\022\013\n"
+          + "\003uri\030\026 \001(\t\022-\n\006images\030\027 \003(\0132\035.google.clou"
+          + "d.retail.v2.Image\032Z\n\017AttributesEntry\022\013\n\003"
+          + "key\030\001 \001(\t\0226\n\005value\030\002 \001(\0132\'.google.cloud."
+          + "retail.v2.CustomAttribute:\0028\001\"F\n\004Type\022\024\n"
+          + "\020TYPE_UNSPECIFIED\020\000\022\013\n\007PRIMARY\020\001\022\013\n\007VARI"
+          + "ANT\020\002\022\016\n\nCOLLECTION\020\003\"i\n\014Availability\022\034\n"
+          + "\030AVAILABILITY_UNSPECIFIED\020\000\022\014\n\010IN_STOCK\020"
+          + "\001\022\020\n\014OUT_OF_STOCK\020\002\022\014\n\010PREORDER\020\003\022\r\n\tBAC"
+          + "KORDER\020\004:\204\001\352A\200\001\n\035retail.googleapis.com/P"
+          + "roduct\022_projects/{project}/locations/{lo"
+          + "cation}/catalogs/{catalog}/branches/{bra"
+          + "nch}/products/{product}B\260\002\n\032com.google.c"
+          + "loud.retail.v2B\014ProductProtoP\001Z<google.g"
+          + "olang.org/genproto/googleapis/cloud/reta"
+          + "il/v2;retail\242\002\006RETAIL\252\002\026Google.Cloud.Ret"
+          + "ail.V2\312\002\026Google\\Cloud\\Retail\\V2\352\002\031Google"
+          + "::Cloud::Retail::V2\352Al\n\034retail.googleapi"
+          + "s.com/Branch\022Lprojects/{project}/locatio"
+          + "ns/{location}/catalogs/{catalog}/branche"
+          + "s/{branch}b\006proto3"
+    };
+    descriptor =
+        com.google.protobuf.Descriptors.FileDescriptor.internalBuildGeneratedFileFrom(
+            descriptorData,
+            new com.google.protobuf.Descriptors.FileDescriptor[] {
+              com.google.api.AnnotationsProto.getDescriptor(),
+              com.google.api.FieldBehaviorProto.getDescriptor(),
+              com.google.api.ResourceProto.getDescriptor(),
+              com.google.cloud.retail.v2.CommonProto.getDescriptor(),
+              com.google.protobuf.FieldMaskProto.getDescriptor(),
+              com.google.protobuf.TimestampProto.getDescriptor(),
+              com.google.protobuf.WrappersProto.getDescriptor(),
+            });
+    internal_static_google_cloud_retail_v2_Product_descriptor =
+        getDescriptor().getMessageTypes().get(0);
+    internal_static_google_cloud_retail_v2_Product_fieldAccessorTable =
+        new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+            internal_static_google_cloud_retail_v2_Product_descriptor,
+            new java.lang.String[] {
+              "Name",
+              "Id",
+              "Type",
+              "PrimaryProductId",
+              "Categories",
+              "Title",
+              "Description",
+              "Attributes",
+              "Tags",
+              "PriceInfo",
+              "AvailableTime",
+              "Availability",
+              "AvailableQuantity",
+              "Uri",
+              "Images",
+            });
+    internal_static_google_cloud_retail_v2_Product_AttributesEntry_descriptor =
+        internal_static_google_cloud_retail_v2_Product_descriptor.getNestedTypes().get(0);
+    internal_static_google_cloud_retail_v2_Product_AttributesEntry_fieldAccessorTable =
+        new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+            internal_static_google_cloud_retail_v2_Product_AttributesEntry_descriptor,
+            new java.lang.String[] {
+              "Key", "Value",
+            });
+    com.google.protobuf.ExtensionRegistry registry =
+        com.google.protobuf.ExtensionRegistry.newInstance();
+    registry.add(com.google.api.FieldBehaviorProto.fieldBehavior);
+    registry.add(com.google.api.ResourceProto.resource);
+    registry.add(com.google.api.ResourceProto.resourceDefinition);
+    com.google.protobuf.Descriptors.FileDescriptor.internalUpdateFileDescriptor(
+        descriptor, registry);
+    com.google.api.AnnotationsProto.getDescriptor();
+    com.google.api.FieldBehaviorProto.getDescriptor();
+    com.google.api.ResourceProto.getDescriptor();
+    com.google.cloud.retail.v2.CommonProto.getDescriptor();
+    com.google.protobuf.FieldMaskProto.getDescriptor();
+    com.google.protobuf.TimestampProto.getDescriptor();
+    com.google.protobuf.WrappersProto.getDescriptor();
+  }
+
+  // @@protoc_insertion_point(outer_class_scope)
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ProductServiceProto.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ProductServiceProto.java
new file mode 100644
index 00000000..3da3ed78
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/ProductServiceProto.java
@@ -0,0 +1,182 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/product_service.proto
+
+package com.google.cloud.retail.v2;
+
+public final class ProductServiceProto {
+  private ProductServiceProto() {}
+
+  public static void registerAllExtensions(com.google.protobuf.ExtensionRegistryLite registry) {}
+
+  public static void registerAllExtensions(com.google.protobuf.ExtensionRegistry registry) {
+    registerAllExtensions((com.google.protobuf.ExtensionRegistryLite) registry);
+  }
+
+  static final com.google.protobuf.Descriptors.Descriptor
+      internal_static_google_cloud_retail_v2_CreateProductRequest_descriptor;
+  static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_google_cloud_retail_v2_CreateProductRequest_fieldAccessorTable;
+  static final com.google.protobuf.Descriptors.Descriptor
+      internal_static_google_cloud_retail_v2_GetProductRequest_descriptor;
+  static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_google_cloud_retail_v2_GetProductRequest_fieldAccessorTable;
+  static final com.google.protobuf.Descriptors.Descriptor
+      internal_static_google_cloud_retail_v2_UpdateProductRequest_descriptor;
+  static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_google_cloud_retail_v2_UpdateProductRequest_fieldAccessorTable;
+  static final com.google.protobuf.Descriptors.Descriptor
+      internal_static_google_cloud_retail_v2_DeleteProductRequest_descriptor;
+  static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_google_cloud_retail_v2_DeleteProductRequest_fieldAccessorTable;
+
+  public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
+    return descriptor;
+  }
+
+  private static com.google.protobuf.Descriptors.FileDescriptor descriptor;
+
+  static {
+    java.lang.String[] descriptorData = {
+      "\n,google/cloud/retail/v2/product_service"
+          + ".proto\022\026google.cloud.retail.v2\032\034google/a"
+          + "pi/annotations.proto\032\027google/api/client."
+          + "proto\032\037google/api/field_behavior.proto\032\031"
+          + "google/api/resource.proto\032*google/cloud/"
+          + "retail/v2/import_config.proto\032$google/cl"
+          + "oud/retail/v2/product.proto\032)google/clou"
+          + "d/retail/v2/purge_config.proto\032#google/l"
+          + "ongrunning/operations.proto\032\033google/prot"
+          + "obuf/empty.proto\032 google/protobuf/field_"
+          + "mask.proto\"\234\001\n\024CreateProductRequest\0224\n\006p"
+          + "arent\030\001 \001(\tB$\340A\002\372A\036\n\034retail.googleapis.c"
+          + "om/Branch\0225\n\007product\030\002 \001(\0132\037.google.clou"
+          + "d.retail.v2.ProductB\003\340A\002\022\027\n\nproduct_id\030\003"
+          + " \001(\tB\003\340A\002\"H\n\021GetProductRequest\0223\n\004name\030\001"
+          + " \001(\tB%\340A\002\372A\037\n\035retail.googleapis.com/Prod"
+          + "uct\"~\n\024UpdateProductRequest\0225\n\007product\030\001"
+          + " \001(\0132\037.google.cloud.retail.v2.ProductB\003\340"
+          + "A\002\022/\n\013update_mask\030\002 \001(\0132\032.google.protobu"
+          + "f.FieldMask\"K\n\024DeleteProductRequest\0223\n\004n"
+          + "ame\030\001 \001(\tB%\340A\002\372A\037\n\035retail.googleapis.com"
+          + "/Product2\356\010\n\016ProductService\022\317\001\n\rCreatePr"
+          + "oduct\022,.google.cloud.retail.v2.CreatePro"
+          + "ductRequest\032\037.google.cloud.retail.v2.Pro"
+          + "duct\"o\202\323\344\223\002M\"B/v2/{parent=projects/*/loc"
+          + "ations/*/catalogs/*/branches/*}/products"
+          + ":\007product\332A\031parent,product,product_id\022\254\001"
+          + "\n\nGetProduct\022).google.cloud.retail.v2.Ge"
+          + "tProductRequest\032\037.google.cloud.retail.v2"
+          + ".Product\"R\202\323\344\223\002E\022C/v2/{name=projects/*/l"
+          + "ocations/*/catalogs/*/branches/*/product"
+          + "s/**}\332A\004name\022\322\001\n\rUpdateProduct\022,.google."
+          + "cloud.retail.v2.UpdateProductRequest\032\037.g"
+          + "oogle.cloud.retail.v2.Product\"r\202\323\344\223\002V2K/"
+          + "v2/{product.name=projects/*/locations/*/"
+          + "catalogs/*/branches/*/products/**}:\007prod"
+          + "uct\332A\023product,update_mask\022\251\001\n\rDeleteProd"
+          + "uct\022,.google.cloud.retail.v2.DeleteProdu"
+          + "ctRequest\032\026.google.protobuf.Empty\"R\202\323\344\223\002"
+          + "E*C/v2/{name=projects/*/locations/*/cata"
+          + "logs/*/branches/*/products/**}\332A\004name\022\216\002"
+          + "\n\016ImportProducts\022-.google.cloud.retail.v"
+          + "2.ImportProductsRequest\032\035.google.longrun"
+          + "ning.Operation\"\255\001\202\323\344\223\002N\"I/v2/{parent=pro"
+          + "jects/*/locations/*/catalogs/*/branches/"
+          + "*}/products:import:\001*\312AV\n-google.cloud.r"
+          + "etail.v2.ImportProductsResponse\022%google."
+          + "cloud.retail.v2.ImportMetadata\032I\312A\025retai"
+          + "l.googleapis.com\322A.https://www.googleapi"
+          + "s.com/auth/cloud-platformB\310\001\n\032com.google"
+          + ".cloud.retail.v2B\023ProductServiceProtoP\001Z"
+          + "<google.golang.org/genproto/googleapis/c"
+          + "loud/retail/v2;retail\242\002\006RETAIL\252\002\026Google."
+          + "Cloud.Retail.V2\312\002\026Google\\Cloud\\Retail\\V2"
+          + "\352\002\031Google::Cloud::Retail::V2b\006proto3"
+    };
+    descriptor =
+        com.google.protobuf.Descriptors.FileDescriptor.internalBuildGeneratedFileFrom(
+            descriptorData,
+            new com.google.protobuf.Descriptors.FileDescriptor[] {
+              com.google.api.AnnotationsProto.getDescriptor(),
+              com.google.api.ClientProto.getDescriptor(),
+              com.google.api.FieldBehaviorProto.getDescriptor(),
+              com.google.api.ResourceProto.getDescriptor(),
+              com.google.cloud.retail.v2.ImportConfigProto.getDescriptor(),
+              com.google.cloud.retail.v2.ProductProto.getDescriptor(),
+              com.google.cloud.retail.v2.PurgeConfigProto.getDescriptor(),
+              com.google.longrunning.OperationsProto.getDescriptor(),
+              com.google.protobuf.EmptyProto.getDescriptor(),
+              com.google.protobuf.FieldMaskProto.getDescriptor(),
+            });
+    internal_static_google_cloud_retail_v2_CreateProductRequest_descriptor =
+        getDescriptor().getMessageTypes().get(0);
+    internal_static_google_cloud_retail_v2_CreateProductRequest_fieldAccessorTable =
+        new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+            internal_static_google_cloud_retail_v2_CreateProductRequest_descriptor,
+            new java.lang.String[] {
+              "Parent", "Product", "ProductId",
+            });
+    internal_static_google_cloud_retail_v2_GetProductRequest_descriptor =
+        getDescriptor().getMessageTypes().get(1);
+    internal_static_google_cloud_retail_v2_GetProductRequest_fieldAccessorTable =
+        new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+            internal_static_google_cloud_retail_v2_GetProductRequest_descriptor,
+            new java.lang.String[] {
+              "Name",
+            });
+    internal_static_google_cloud_retail_v2_UpdateProductRequest_descriptor =
+        getDescriptor().getMessageTypes().get(2);
+    internal_static_google_cloud_retail_v2_UpdateProductRequest_fieldAccessorTable =
+        new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+            internal_static_google_cloud_retail_v2_UpdateProductRequest_descriptor,
+            new java.lang.String[] {
+              "Product", "UpdateMask",
+            });
+    internal_static_google_cloud_retail_v2_DeleteProductRequest_descriptor =
+        getDescriptor().getMessageTypes().get(3);
+    internal_static_google_cloud_retail_v2_DeleteProductRequest_fieldAccessorTable =
+        new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+            internal_static_google_cloud_retail_v2_DeleteProductRequest_descriptor,
+            new java.lang.String[] {
+              "Name",
+            });
+    com.google.protobuf.ExtensionRegistry registry =
+        com.google.protobuf.ExtensionRegistry.newInstance();
+    registry.add(com.google.api.ClientProto.defaultHost);
+    registry.add(com.google.api.FieldBehaviorProto.fieldBehavior);
+    registry.add(com.google.api.AnnotationsProto.http);
+    registry.add(com.google.api.ClientProto.methodSignature);
+    registry.add(com.google.api.ClientProto.oauthScopes);
+    registry.add(com.google.api.ResourceProto.resourceReference);
+    registry.add(com.google.longrunning.OperationsProto.operationInfo);
+    com.google.protobuf.Descriptors.FileDescriptor.internalUpdateFileDescriptor(
+        descriptor, registry);
+    com.google.api.AnnotationsProto.getDescriptor();
+    com.google.api.ClientProto.getDescriptor();
+    com.google.api.FieldBehaviorProto.getDescriptor();
+    com.google.api.ResourceProto.getDescriptor();
+    com.google.cloud.retail.v2.ImportConfigProto.getDescriptor();
+    com.google.cloud.retail.v2.ProductProto.getDescriptor();
+    com.google.cloud.retail.v2.PurgeConfigProto.getDescriptor();
+    com.google.longrunning.OperationsProto.getDescriptor();
+    com.google.protobuf.EmptyProto.getDescriptor();
+    com.google.protobuf.FieldMaskProto.getDescriptor();
+  }
+
+  // @@protoc_insertion_point(outer_class_scope)
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/PurchaseTransaction.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/PurchaseTransaction.java
new file mode 100644
index 00000000..e04d502e
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/PurchaseTransaction.java
@@ -0,0 +1,1118 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/user_event.proto
+
+package com.google.cloud.retail.v2;
+
+/**
+ *
+ *
+ * <pre>
+ * A transaction represents the entire purchase transaction.
+ * </pre>
+ *
+ * Protobuf type {@code google.cloud.retail.v2.PurchaseTransaction}
+ */
+public final class PurchaseTransaction extends com.google.protobuf.GeneratedMessageV3
+    implements
+    // @@protoc_insertion_point(message_implements:google.cloud.retail.v2.PurchaseTransaction)
+    PurchaseTransactionOrBuilder {
+  private static final long serialVersionUID = 0L;
+  // Use PurchaseTransaction.newBuilder() to construct.
+  private PurchaseTransaction(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+    super(builder);
+  }
+
+  private PurchaseTransaction() {
+    id_ = "";
+    currencyCode_ = "";
+  }
+
+  @java.lang.Override
+  @SuppressWarnings({"unused"})
+  protected java.lang.Object newInstance(UnusedPrivateParameter unused) {
+    return new PurchaseTransaction();
+  }
+
+  @java.lang.Override
+  public final com.google.protobuf.UnknownFieldSet getUnknownFields() {
+    return this.unknownFields;
+  }
+
+  private PurchaseTransaction(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    this();
+    if (extensionRegistry == null) {
+      throw new java.lang.NullPointerException();
+    }
+    com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+        com.google.protobuf.UnknownFieldSet.newBuilder();
+    try {
+      boolean done = false;
+      while (!done) {
+        int tag = input.readTag();
+        switch (tag) {
+          case 0:
+            done = true;
+            break;
+          case 10:
+            {
+              java.lang.String s = input.readStringRequireUtf8();
+
+              id_ = s;
+              break;
+            }
+          case 21:
+            {
+              revenue_ = input.readFloat();
+              break;
+            }
+          case 29:
+            {
+              tax_ = input.readFloat();
+              break;
+            }
+          case 37:
+            {
+              cost_ = input.readFloat();
+              break;
+            }
+          case 42:
+            {
+              java.lang.String s = input.readStringRequireUtf8();
+
+              currencyCode_ = s;
+              break;
+            }
+          default:
+            {
+              if (!parseUnknownField(input, unknownFields, extensionRegistry, tag)) {
+                done = true;
+              }
+              break;
+            }
+        }
+      }
+    } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+      throw e.setUnfinishedMessage(this);
+    } catch (java.io.IOException e) {
+      throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
+    } finally {
+      this.unknownFields = unknownFields.build();
+      makeExtensionsImmutable();
+    }
+  }
+
+  public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+    return com.google.cloud.retail.v2.UserEventProto
+        .internal_static_google_cloud_retail_v2_PurchaseTransaction_descriptor;
+  }
+
+  @java.lang.Override
+  protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internalGetFieldAccessorTable() {
+    return com.google.cloud.retail.v2.UserEventProto
+        .internal_static_google_cloud_retail_v2_PurchaseTransaction_fieldAccessorTable
+        .ensureFieldAccessorsInitialized(
+            com.google.cloud.retail.v2.PurchaseTransaction.class,
+            com.google.cloud.retail.v2.PurchaseTransaction.Builder.class);
+  }
+
+  public static final int ID_FIELD_NUMBER = 1;
+  private volatile java.lang.Object id_;
+  /**
+   *
+   *
+   * <pre>
+   * The transaction ID with a length limit of 128 characters.
+   * </pre>
+   *
+   * <code>string id = 1;</code>
+   *
+   * @return The id.
+   */
+  @java.lang.Override
+  public java.lang.String getId() {
+    java.lang.Object ref = id_;
+    if (ref instanceof java.lang.String) {
+      return (java.lang.String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+      java.lang.String s = bs.toStringUtf8();
+      id_ = s;
+      return s;
+    }
+  }
+  /**
+   *
+   *
+   * <pre>
+   * The transaction ID with a length limit of 128 characters.
+   * </pre>
+   *
+   * <code>string id = 1;</code>
+   *
+   * @return The bytes for id.
+   */
+  @java.lang.Override
+  public com.google.protobuf.ByteString getIdBytes() {
+    java.lang.Object ref = id_;
+    if (ref instanceof java.lang.String) {
+      com.google.protobuf.ByteString b =
+          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+      id_ = b;
+      return b;
+    } else {
+      return (com.google.protobuf.ByteString) ref;
+    }
+  }
+
+  public static final int REVENUE_FIELD_NUMBER = 2;
+  private float revenue_;
+  /**
+   *
+   *
+   * <pre>
+   * Required. Total non-zero revenue or grand total associated with the
+   * transaction. This value include shipping, tax, or other adjustments to
+   * total revenue that you want to include as part of your revenue
+   * calculations.
+   * </pre>
+   *
+   * <code>float revenue = 2 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The revenue.
+   */
+  @java.lang.Override
+  public float getRevenue() {
+    return revenue_;
+  }
+
+  public static final int TAX_FIELD_NUMBER = 3;
+  private float tax_;
+  /**
+   *
+   *
+   * <pre>
+   * All the taxes associated with the transaction.
+   * </pre>
+   *
+   * <code>float tax = 3;</code>
+   *
+   * @return The tax.
+   */
+  @java.lang.Override
+  public float getTax() {
+    return tax_;
+  }
+
+  public static final int COST_FIELD_NUMBER = 4;
+  private float cost_;
+  /**
+   *
+   *
+   * <pre>
+   * All the costs associated with the products. These can be manufacturing
+   * costs, shipping expenses not borne by the end user, or any other costs,
+   * such that:
+   * * Profit = [revenue][google.cloud.retail.v2.PurchaseTransaction.revenue] -
+   * [tax][google.cloud.retail.v2.PurchaseTransaction.tax] -
+   * [cost][google.cloud.retail.v2.PurchaseTransaction.cost]
+   * </pre>
+   *
+   * <code>float cost = 4;</code>
+   *
+   * @return The cost.
+   */
+  @java.lang.Override
+  public float getCost() {
+    return cost_;
+  }
+
+  public static final int CURRENCY_CODE_FIELD_NUMBER = 5;
+  private volatile java.lang.Object currencyCode_;
+  /**
+   *
+   *
+   * <pre>
+   * Required. Currency code. Use three-character ISO-4217 code.
+   * </pre>
+   *
+   * <code>string currency_code = 5 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The currencyCode.
+   */
+  @java.lang.Override
+  public java.lang.String getCurrencyCode() {
+    java.lang.Object ref = currencyCode_;
+    if (ref instanceof java.lang.String) {
+      return (java.lang.String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+      java.lang.String s = bs.toStringUtf8();
+      currencyCode_ = s;
+      return s;
+    }
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Required. Currency code. Use three-character ISO-4217 code.
+   * </pre>
+   *
+   * <code>string currency_code = 5 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The bytes for currencyCode.
+   */
+  @java.lang.Override
+  public com.google.protobuf.ByteString getCurrencyCodeBytes() {
+    java.lang.Object ref = currencyCode_;
+    if (ref instanceof java.lang.String) {
+      com.google.protobuf.ByteString b =
+          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+      currencyCode_ = b;
+      return b;
+    } else {
+      return (com.google.protobuf.ByteString) ref;
+    }
+  }
+
+  private byte memoizedIsInitialized = -1;
+
+  @java.lang.Override
+  public final boolean isInitialized() {
+    byte isInitialized = memoizedIsInitialized;
+    if (isInitialized == 1) return true;
+    if (isInitialized == 0) return false;
+
+    memoizedIsInitialized = 1;
+    return true;
+  }
+
+  @java.lang.Override
+  public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
+    if (!getIdBytes().isEmpty()) {
+      com.google.protobuf.GeneratedMessageV3.writeString(output, 1, id_);
+    }
+    if (revenue_ != 0F) {
+      output.writeFloat(2, revenue_);
+    }
+    if (tax_ != 0F) {
+      output.writeFloat(3, tax_);
+    }
+    if (cost_ != 0F) {
+      output.writeFloat(4, cost_);
+    }
+    if (!getCurrencyCodeBytes().isEmpty()) {
+      com.google.protobuf.GeneratedMessageV3.writeString(output, 5, currencyCode_);
+    }
+    unknownFields.writeTo(output);
+  }
+
+  @java.lang.Override
+  public int getSerializedSize() {
+    int size = memoizedSize;
+    if (size != -1) return size;
+
+    size = 0;
+    if (!getIdBytes().isEmpty()) {
+      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(1, id_);
+    }
+    if (revenue_ != 0F) {
+      size += com.google.protobuf.CodedOutputStream.computeFloatSize(2, revenue_);
+    }
+    if (tax_ != 0F) {
+      size += com.google.protobuf.CodedOutputStream.computeFloatSize(3, tax_);
+    }
+    if (cost_ != 0F) {
+      size += com.google.protobuf.CodedOutputStream.computeFloatSize(4, cost_);
+    }
+    if (!getCurrencyCodeBytes().isEmpty()) {
+      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(5, currencyCode_);
+    }
+    size += unknownFields.getSerializedSize();
+    memoizedSize = size;
+    return size;
+  }
+
+  @java.lang.Override
+  public boolean equals(final java.lang.Object obj) {
+    if (obj == this) {
+      return true;
+    }
+    if (!(obj instanceof com.google.cloud.retail.v2.PurchaseTransaction)) {
+      return super.equals(obj);
+    }
+    com.google.cloud.retail.v2.PurchaseTransaction other =
+        (com.google.cloud.retail.v2.PurchaseTransaction) obj;
+
+    if (!getId().equals(other.getId())) return false;
+    if (java.lang.Float.floatToIntBits(getRevenue())
+        != java.lang.Float.floatToIntBits(other.getRevenue())) return false;
+    if (java.lang.Float.floatToIntBits(getTax()) != java.lang.Float.floatToIntBits(other.getTax()))
+      return false;
+    if (java.lang.Float.floatToIntBits(getCost())
+        != java.lang.Float.floatToIntBits(other.getCost())) return false;
+    if (!getCurrencyCode().equals(other.getCurrencyCode())) return false;
+    if (!unknownFields.equals(other.unknownFields)) return false;
+    return true;
+  }
+
+  @java.lang.Override
+  public int hashCode() {
+    if (memoizedHashCode != 0) {
+      return memoizedHashCode;
+    }
+    int hash = 41;
+    hash = (19 * hash) + getDescriptor().hashCode();
+    hash = (37 * hash) + ID_FIELD_NUMBER;
+    hash = (53 * hash) + getId().hashCode();
+    hash = (37 * hash) + REVENUE_FIELD_NUMBER;
+    hash = (53 * hash) + java.lang.Float.floatToIntBits(getRevenue());
+    hash = (37 * hash) + TAX_FIELD_NUMBER;
+    hash = (53 * hash) + java.lang.Float.floatToIntBits(getTax());
+    hash = (37 * hash) + COST_FIELD_NUMBER;
+    hash = (53 * hash) + java.lang.Float.floatToIntBits(getCost());
+    hash = (37 * hash) + CURRENCY_CODE_FIELD_NUMBER;
+    hash = (53 * hash) + getCurrencyCode().hashCode();
+    hash = (29 * hash) + unknownFields.hashCode();
+    memoizedHashCode = hash;
+    return hash;
+  }
+
+  public static com.google.cloud.retail.v2.PurchaseTransaction parseFrom(java.nio.ByteBuffer data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.PurchaseTransaction parseFrom(
+      java.nio.ByteBuffer data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.PurchaseTransaction parseFrom(
+      com.google.protobuf.ByteString data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.PurchaseTransaction parseFrom(
+      com.google.protobuf.ByteString data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.PurchaseTransaction parseFrom(byte[] data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.PurchaseTransaction parseFrom(
+      byte[] data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.PurchaseTransaction parseFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.PurchaseTransaction parseFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.PurchaseTransaction parseDelimitedFrom(
+      java.io.InputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.PurchaseTransaction parseDelimitedFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.PurchaseTransaction parseFrom(
+      com.google.protobuf.CodedInputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.PurchaseTransaction parseFrom(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  @java.lang.Override
+  public Builder newBuilderForType() {
+    return newBuilder();
+  }
+
+  public static Builder newBuilder() {
+    return DEFAULT_INSTANCE.toBuilder();
+  }
+
+  public static Builder newBuilder(com.google.cloud.retail.v2.PurchaseTransaction prototype) {
+    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+  }
+
+  @java.lang.Override
+  public Builder toBuilder() {
+    return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
+  }
+
+  @java.lang.Override
+  protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+    Builder builder = new Builder(parent);
+    return builder;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * A transaction represents the entire purchase transaction.
+   * </pre>
+   *
+   * Protobuf type {@code google.cloud.retail.v2.PurchaseTransaction}
+   */
+  public static final class Builder extends com.google.protobuf.GeneratedMessageV3.Builder<Builder>
+      implements
+      // @@protoc_insertion_point(builder_implements:google.cloud.retail.v2.PurchaseTransaction)
+      com.google.cloud.retail.v2.PurchaseTransactionOrBuilder {
+    public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+      return com.google.cloud.retail.v2.UserEventProto
+          .internal_static_google_cloud_retail_v2_PurchaseTransaction_descriptor;
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return com.google.cloud.retail.v2.UserEventProto
+          .internal_static_google_cloud_retail_v2_PurchaseTransaction_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              com.google.cloud.retail.v2.PurchaseTransaction.class,
+              com.google.cloud.retail.v2.PurchaseTransaction.Builder.class);
+    }
+
+    // Construct using com.google.cloud.retail.v2.PurchaseTransaction.newBuilder()
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
+
+    private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+      super(parent);
+      maybeForceBuilderInitialization();
+    }
+
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders) {}
+    }
+
+    @java.lang.Override
+    public Builder clear() {
+      super.clear();
+      id_ = "";
+
+      revenue_ = 0F;
+
+      tax_ = 0F;
+
+      cost_ = 0F;
+
+      currencyCode_ = "";
+
+      return this;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
+      return com.google.cloud.retail.v2.UserEventProto
+          .internal_static_google_cloud_retail_v2_PurchaseTransaction_descriptor;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.PurchaseTransaction getDefaultInstanceForType() {
+      return com.google.cloud.retail.v2.PurchaseTransaction.getDefaultInstance();
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.PurchaseTransaction build() {
+      com.google.cloud.retail.v2.PurchaseTransaction result = buildPartial();
+      if (!result.isInitialized()) {
+        throw newUninitializedMessageException(result);
+      }
+      return result;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.PurchaseTransaction buildPartial() {
+      com.google.cloud.retail.v2.PurchaseTransaction result =
+          new com.google.cloud.retail.v2.PurchaseTransaction(this);
+      result.id_ = id_;
+      result.revenue_ = revenue_;
+      result.tax_ = tax_;
+      result.cost_ = cost_;
+      result.currencyCode_ = currencyCode_;
+      onBuilt();
+      return result;
+    }
+
+    @java.lang.Override
+    public Builder clone() {
+      return super.clone();
+    }
+
+    @java.lang.Override
+    public Builder setField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.setField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
+      return super.clearField(field);
+    }
+
+    @java.lang.Override
+    public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+      return super.clearOneof(oneof);
+    }
+
+    @java.lang.Override
+    public Builder setRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, int index, java.lang.Object value) {
+      return super.setRepeatedField(field, index, value);
+    }
+
+    @java.lang.Override
+    public Builder addRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.addRepeatedField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(com.google.protobuf.Message other) {
+      if (other instanceof com.google.cloud.retail.v2.PurchaseTransaction) {
+        return mergeFrom((com.google.cloud.retail.v2.PurchaseTransaction) other);
+      } else {
+        super.mergeFrom(other);
+        return this;
+      }
+    }
+
+    public Builder mergeFrom(com.google.cloud.retail.v2.PurchaseTransaction other) {
+      if (other == com.google.cloud.retail.v2.PurchaseTransaction.getDefaultInstance()) return this;
+      if (!other.getId().isEmpty()) {
+        id_ = other.id_;
+        onChanged();
+      }
+      if (other.getRevenue() != 0F) {
+        setRevenue(other.getRevenue());
+      }
+      if (other.getTax() != 0F) {
+        setTax(other.getTax());
+      }
+      if (other.getCost() != 0F) {
+        setCost(other.getCost());
+      }
+      if (!other.getCurrencyCode().isEmpty()) {
+        currencyCode_ = other.currencyCode_;
+        onChanged();
+      }
+      this.mergeUnknownFields(other.unknownFields);
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final boolean isInitialized() {
+      return true;
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      com.google.cloud.retail.v2.PurchaseTransaction parsedMessage = null;
+      try {
+        parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        parsedMessage = (com.google.cloud.retail.v2.PurchaseTransaction) e.getUnfinishedMessage();
+        throw e.unwrapIOException();
+      } finally {
+        if (parsedMessage != null) {
+          mergeFrom(parsedMessage);
+        }
+      }
+      return this;
+    }
+
+    private java.lang.Object id_ = "";
+    /**
+     *
+     *
+     * <pre>
+     * The transaction ID with a length limit of 128 characters.
+     * </pre>
+     *
+     * <code>string id = 1;</code>
+     *
+     * @return The id.
+     */
+    public java.lang.String getId() {
+      java.lang.Object ref = id_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        id_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The transaction ID with a length limit of 128 characters.
+     * </pre>
+     *
+     * <code>string id = 1;</code>
+     *
+     * @return The bytes for id.
+     */
+    public com.google.protobuf.ByteString getIdBytes() {
+      java.lang.Object ref = id_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b =
+            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+        id_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The transaction ID with a length limit of 128 characters.
+     * </pre>
+     *
+     * <code>string id = 1;</code>
+     *
+     * @param value The id to set.
+     * @return This builder for chaining.
+     */
+    public Builder setId(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+
+      id_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The transaction ID with a length limit of 128 characters.
+     * </pre>
+     *
+     * <code>string id = 1;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearId() {
+
+      id_ = getDefaultInstance().getId();
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The transaction ID with a length limit of 128 characters.
+     * </pre>
+     *
+     * <code>string id = 1;</code>
+     *
+     * @param value The bytes for id to set.
+     * @return This builder for chaining.
+     */
+    public Builder setIdBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+
+      id_ = value;
+      onChanged();
+      return this;
+    }
+
+    private float revenue_;
+    /**
+     *
+     *
+     * <pre>
+     * Required. Total non-zero revenue or grand total associated with the
+     * transaction. This value include shipping, tax, or other adjustments to
+     * total revenue that you want to include as part of your revenue
+     * calculations.
+     * </pre>
+     *
+     * <code>float revenue = 2 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @return The revenue.
+     */
+    @java.lang.Override
+    public float getRevenue() {
+      return revenue_;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. Total non-zero revenue or grand total associated with the
+     * transaction. This value include shipping, tax, or other adjustments to
+     * total revenue that you want to include as part of your revenue
+     * calculations.
+     * </pre>
+     *
+     * <code>float revenue = 2 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @param value The revenue to set.
+     * @return This builder for chaining.
+     */
+    public Builder setRevenue(float value) {
+
+      revenue_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. Total non-zero revenue or grand total associated with the
+     * transaction. This value include shipping, tax, or other adjustments to
+     * total revenue that you want to include as part of your revenue
+     * calculations.
+     * </pre>
+     *
+     * <code>float revenue = 2 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearRevenue() {
+
+      revenue_ = 0F;
+      onChanged();
+      return this;
+    }
+
+    private float tax_;
+    /**
+     *
+     *
+     * <pre>
+     * All the taxes associated with the transaction.
+     * </pre>
+     *
+     * <code>float tax = 3;</code>
+     *
+     * @return The tax.
+     */
+    @java.lang.Override
+    public float getTax() {
+      return tax_;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * All the taxes associated with the transaction.
+     * </pre>
+     *
+     * <code>float tax = 3;</code>
+     *
+     * @param value The tax to set.
+     * @return This builder for chaining.
+     */
+    public Builder setTax(float value) {
+
+      tax_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * All the taxes associated with the transaction.
+     * </pre>
+     *
+     * <code>float tax = 3;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearTax() {
+
+      tax_ = 0F;
+      onChanged();
+      return this;
+    }
+
+    private float cost_;
+    /**
+     *
+     *
+     * <pre>
+     * All the costs associated with the products. These can be manufacturing
+     * costs, shipping expenses not borne by the end user, or any other costs,
+     * such that:
+     * * Profit = [revenue][google.cloud.retail.v2.PurchaseTransaction.revenue] -
+     * [tax][google.cloud.retail.v2.PurchaseTransaction.tax] -
+     * [cost][google.cloud.retail.v2.PurchaseTransaction.cost]
+     * </pre>
+     *
+     * <code>float cost = 4;</code>
+     *
+     * @return The cost.
+     */
+    @java.lang.Override
+    public float getCost() {
+      return cost_;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * All the costs associated with the products. These can be manufacturing
+     * costs, shipping expenses not borne by the end user, or any other costs,
+     * such that:
+     * * Profit = [revenue][google.cloud.retail.v2.PurchaseTransaction.revenue] -
+     * [tax][google.cloud.retail.v2.PurchaseTransaction.tax] -
+     * [cost][google.cloud.retail.v2.PurchaseTransaction.cost]
+     * </pre>
+     *
+     * <code>float cost = 4;</code>
+     *
+     * @param value The cost to set.
+     * @return This builder for chaining.
+     */
+    public Builder setCost(float value) {
+
+      cost_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * All the costs associated with the products. These can be manufacturing
+     * costs, shipping expenses not borne by the end user, or any other costs,
+     * such that:
+     * * Profit = [revenue][google.cloud.retail.v2.PurchaseTransaction.revenue] -
+     * [tax][google.cloud.retail.v2.PurchaseTransaction.tax] -
+     * [cost][google.cloud.retail.v2.PurchaseTransaction.cost]
+     * </pre>
+     *
+     * <code>float cost = 4;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearCost() {
+
+      cost_ = 0F;
+      onChanged();
+      return this;
+    }
+
+    private java.lang.Object currencyCode_ = "";
+    /**
+     *
+     *
+     * <pre>
+     * Required. Currency code. Use three-character ISO-4217 code.
+     * </pre>
+     *
+     * <code>string currency_code = 5 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @return The currencyCode.
+     */
+    public java.lang.String getCurrencyCode() {
+      java.lang.Object ref = currencyCode_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        currencyCode_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. Currency code. Use three-character ISO-4217 code.
+     * </pre>
+     *
+     * <code>string currency_code = 5 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @return The bytes for currencyCode.
+     */
+    public com.google.protobuf.ByteString getCurrencyCodeBytes() {
+      java.lang.Object ref = currencyCode_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b =
+            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+        currencyCode_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. Currency code. Use three-character ISO-4217 code.
+     * </pre>
+     *
+     * <code>string currency_code = 5 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @param value The currencyCode to set.
+     * @return This builder for chaining.
+     */
+    public Builder setCurrencyCode(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+
+      currencyCode_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. Currency code. Use three-character ISO-4217 code.
+     * </pre>
+     *
+     * <code>string currency_code = 5 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearCurrencyCode() {
+
+      currencyCode_ = getDefaultInstance().getCurrencyCode();
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. Currency code. Use three-character ISO-4217 code.
+     * </pre>
+     *
+     * <code>string currency_code = 5 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @param value The bytes for currencyCode to set.
+     * @return This builder for chaining.
+     */
+    public Builder setCurrencyCodeBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+
+      currencyCode_ = value;
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.setUnknownFields(unknownFields);
+    }
+
+    @java.lang.Override
+    public final Builder mergeUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.mergeUnknownFields(unknownFields);
+    }
+
+    // @@protoc_insertion_point(builder_scope:google.cloud.retail.v2.PurchaseTransaction)
+  }
+
+  // @@protoc_insertion_point(class_scope:google.cloud.retail.v2.PurchaseTransaction)
+  private static final com.google.cloud.retail.v2.PurchaseTransaction DEFAULT_INSTANCE;
+
+  static {
+    DEFAULT_INSTANCE = new com.google.cloud.retail.v2.PurchaseTransaction();
+  }
+
+  public static com.google.cloud.retail.v2.PurchaseTransaction getDefaultInstance() {
+    return DEFAULT_INSTANCE;
+  }
+
+  private static final com.google.protobuf.Parser<PurchaseTransaction> PARSER =
+      new com.google.protobuf.AbstractParser<PurchaseTransaction>() {
+        @java.lang.Override
+        public PurchaseTransaction parsePartialFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws com.google.protobuf.InvalidProtocolBufferException {
+          return new PurchaseTransaction(input, extensionRegistry);
+        }
+      };
+
+  public static com.google.protobuf.Parser<PurchaseTransaction> parser() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.protobuf.Parser<PurchaseTransaction> getParserForType() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.cloud.retail.v2.PurchaseTransaction getDefaultInstanceForType() {
+    return DEFAULT_INSTANCE;
+  }
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/PurchaseTransactionOrBuilder.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/PurchaseTransactionOrBuilder.java
new file mode 100644
index 00000000..efe6341b
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/PurchaseTransactionOrBuilder.java
@@ -0,0 +1,122 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/user_event.proto
+
+package com.google.cloud.retail.v2;
+
+public interface PurchaseTransactionOrBuilder
+    extends
+    // @@protoc_insertion_point(interface_extends:google.cloud.retail.v2.PurchaseTransaction)
+    com.google.protobuf.MessageOrBuilder {
+
+  /**
+   *
+   *
+   * <pre>
+   * The transaction ID with a length limit of 128 characters.
+   * </pre>
+   *
+   * <code>string id = 1;</code>
+   *
+   * @return The id.
+   */
+  java.lang.String getId();
+  /**
+   *
+   *
+   * <pre>
+   * The transaction ID with a length limit of 128 characters.
+   * </pre>
+   *
+   * <code>string id = 1;</code>
+   *
+   * @return The bytes for id.
+   */
+  com.google.protobuf.ByteString getIdBytes();
+
+  /**
+   *
+   *
+   * <pre>
+   * Required. Total non-zero revenue or grand total associated with the
+   * transaction. This value include shipping, tax, or other adjustments to
+   * total revenue that you want to include as part of your revenue
+   * calculations.
+   * </pre>
+   *
+   * <code>float revenue = 2 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The revenue.
+   */
+  float getRevenue();
+
+  /**
+   *
+   *
+   * <pre>
+   * All the taxes associated with the transaction.
+   * </pre>
+   *
+   * <code>float tax = 3;</code>
+   *
+   * @return The tax.
+   */
+  float getTax();
+
+  /**
+   *
+   *
+   * <pre>
+   * All the costs associated with the products. These can be manufacturing
+   * costs, shipping expenses not borne by the end user, or any other costs,
+   * such that:
+   * * Profit = [revenue][google.cloud.retail.v2.PurchaseTransaction.revenue] -
+   * [tax][google.cloud.retail.v2.PurchaseTransaction.tax] -
+   * [cost][google.cloud.retail.v2.PurchaseTransaction.cost]
+   * </pre>
+   *
+   * <code>float cost = 4;</code>
+   *
+   * @return The cost.
+   */
+  float getCost();
+
+  /**
+   *
+   *
+   * <pre>
+   * Required. Currency code. Use three-character ISO-4217 code.
+   * </pre>
+   *
+   * <code>string currency_code = 5 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The currencyCode.
+   */
+  java.lang.String getCurrencyCode();
+  /**
+   *
+   *
+   * <pre>
+   * Required. Currency code. Use three-character ISO-4217 code.
+   * </pre>
+   *
+   * <code>string currency_code = 5 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The bytes for currencyCode.
+   */
+  com.google.protobuf.ByteString getCurrencyCodeBytes();
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/PurgeConfigProto.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/PurgeConfigProto.java
new file mode 100644
index 00000000..2d2a67ea
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/PurgeConfigProto.java
@@ -0,0 +1,104 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/purge_config.proto
+
+package com.google.cloud.retail.v2;
+
+public final class PurgeConfigProto {
+  private PurgeConfigProto() {}
+
+  public static void registerAllExtensions(com.google.protobuf.ExtensionRegistryLite registry) {}
+
+  public static void registerAllExtensions(com.google.protobuf.ExtensionRegistry registry) {
+    registerAllExtensions((com.google.protobuf.ExtensionRegistryLite) registry);
+  }
+
+  static final com.google.protobuf.Descriptors.Descriptor
+      internal_static_google_cloud_retail_v2_PurgeMetadata_descriptor;
+  static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_google_cloud_retail_v2_PurgeMetadata_fieldAccessorTable;
+  static final com.google.protobuf.Descriptors.Descriptor
+      internal_static_google_cloud_retail_v2_PurgeUserEventsRequest_descriptor;
+  static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_google_cloud_retail_v2_PurgeUserEventsRequest_fieldAccessorTable;
+  static final com.google.protobuf.Descriptors.Descriptor
+      internal_static_google_cloud_retail_v2_PurgeUserEventsResponse_descriptor;
+  static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_google_cloud_retail_v2_PurgeUserEventsResponse_fieldAccessorTable;
+
+  public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
+    return descriptor;
+  }
+
+  private static com.google.protobuf.Descriptors.FileDescriptor descriptor;
+
+  static {
+    java.lang.String[] descriptorData = {
+      "\n)google/cloud/retail/v2/purge_config.pr"
+          + "oto\022\026google.cloud.retail.v2\032\034google/api/"
+          + "annotations.proto\032\037google/api/field_beha"
+          + "vior.proto\"\017\n\rPurgeMetadata\"Q\n\026PurgeUser"
+          + "EventsRequest\022\023\n\006parent\030\001 \001(\tB\003\340A\002\022\023\n\006fi"
+          + "lter\030\002 \001(\tB\003\340A\002\022\r\n\005force\030\003 \001(\010\"6\n\027PurgeU"
+          + "serEventsResponse\022\033\n\023purged_events_count"
+          + "\030\001 \001(\003B\305\001\n\032com.google.cloud.retail.v2B\020P"
+          + "urgeConfigProtoP\001Z<google.golang.org/gen"
+          + "proto/googleapis/cloud/retail/v2;retail\242"
+          + "\002\006RETAIL\252\002\026Google.Cloud.Retail.V2\312\002\026Goog"
+          + "le\\Cloud\\Retail\\V2\352\002\031Google::Cloud::Reta"
+          + "il::V2b\006proto3"
+    };
+    descriptor =
+        com.google.protobuf.Descriptors.FileDescriptor.internalBuildGeneratedFileFrom(
+            descriptorData,
+            new com.google.protobuf.Descriptors.FileDescriptor[] {
+              com.google.api.AnnotationsProto.getDescriptor(),
+              com.google.api.FieldBehaviorProto.getDescriptor(),
+            });
+    internal_static_google_cloud_retail_v2_PurgeMetadata_descriptor =
+        getDescriptor().getMessageTypes().get(0);
+    internal_static_google_cloud_retail_v2_PurgeMetadata_fieldAccessorTable =
+        new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+            internal_static_google_cloud_retail_v2_PurgeMetadata_descriptor,
+            new java.lang.String[] {});
+    internal_static_google_cloud_retail_v2_PurgeUserEventsRequest_descriptor =
+        getDescriptor().getMessageTypes().get(1);
+    internal_static_google_cloud_retail_v2_PurgeUserEventsRequest_fieldAccessorTable =
+        new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+            internal_static_google_cloud_retail_v2_PurgeUserEventsRequest_descriptor,
+            new java.lang.String[] {
+              "Parent", "Filter", "Force",
+            });
+    internal_static_google_cloud_retail_v2_PurgeUserEventsResponse_descriptor =
+        getDescriptor().getMessageTypes().get(2);
+    internal_static_google_cloud_retail_v2_PurgeUserEventsResponse_fieldAccessorTable =
+        new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+            internal_static_google_cloud_retail_v2_PurgeUserEventsResponse_descriptor,
+            new java.lang.String[] {
+              "PurgedEventsCount",
+            });
+    com.google.protobuf.ExtensionRegistry registry =
+        com.google.protobuf.ExtensionRegistry.newInstance();
+    registry.add(com.google.api.FieldBehaviorProto.fieldBehavior);
+    com.google.protobuf.Descriptors.FileDescriptor.internalUpdateFileDescriptor(
+        descriptor, registry);
+    com.google.api.AnnotationsProto.getDescriptor();
+    com.google.api.FieldBehaviorProto.getDescriptor();
+  }
+
+  // @@protoc_insertion_point(outer_class_scope)
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/PurgeMetadata.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/PurgeMetadata.java
new file mode 100644
index 00000000..49bd21c1
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/PurgeMetadata.java
@@ -0,0 +1,455 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/purge_config.proto
+
+package com.google.cloud.retail.v2;
+
+/**
+ *
+ *
+ * <pre>
+ * Metadata related to the progress of the Purge operation.
+ * This will be returned by the google.longrunning.Operation.metadata field.
+ * </pre>
+ *
+ * Protobuf type {@code google.cloud.retail.v2.PurgeMetadata}
+ */
+public final class PurgeMetadata extends com.google.protobuf.GeneratedMessageV3
+    implements
+    // @@protoc_insertion_point(message_implements:google.cloud.retail.v2.PurgeMetadata)
+    PurgeMetadataOrBuilder {
+  private static final long serialVersionUID = 0L;
+  // Use PurgeMetadata.newBuilder() to construct.
+  private PurgeMetadata(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+    super(builder);
+  }
+
+  private PurgeMetadata() {}
+
+  @java.lang.Override
+  @SuppressWarnings({"unused"})
+  protected java.lang.Object newInstance(UnusedPrivateParameter unused) {
+    return new PurgeMetadata();
+  }
+
+  @java.lang.Override
+  public final com.google.protobuf.UnknownFieldSet getUnknownFields() {
+    return this.unknownFields;
+  }
+
+  private PurgeMetadata(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    this();
+    if (extensionRegistry == null) {
+      throw new java.lang.NullPointerException();
+    }
+    com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+        com.google.protobuf.UnknownFieldSet.newBuilder();
+    try {
+      boolean done = false;
+      while (!done) {
+        int tag = input.readTag();
+        switch (tag) {
+          case 0:
+            done = true;
+            break;
+          default:
+            {
+              if (!parseUnknownField(input, unknownFields, extensionRegistry, tag)) {
+                done = true;
+              }
+              break;
+            }
+        }
+      }
+    } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+      throw e.setUnfinishedMessage(this);
+    } catch (java.io.IOException e) {
+      throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
+    } finally {
+      this.unknownFields = unknownFields.build();
+      makeExtensionsImmutable();
+    }
+  }
+
+  public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+    return com.google.cloud.retail.v2.PurgeConfigProto
+        .internal_static_google_cloud_retail_v2_PurgeMetadata_descriptor;
+  }
+
+  @java.lang.Override
+  protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internalGetFieldAccessorTable() {
+    return com.google.cloud.retail.v2.PurgeConfigProto
+        .internal_static_google_cloud_retail_v2_PurgeMetadata_fieldAccessorTable
+        .ensureFieldAccessorsInitialized(
+            com.google.cloud.retail.v2.PurgeMetadata.class,
+            com.google.cloud.retail.v2.PurgeMetadata.Builder.class);
+  }
+
+  private byte memoizedIsInitialized = -1;
+
+  @java.lang.Override
+  public final boolean isInitialized() {
+    byte isInitialized = memoizedIsInitialized;
+    if (isInitialized == 1) return true;
+    if (isInitialized == 0) return false;
+
+    memoizedIsInitialized = 1;
+    return true;
+  }
+
+  @java.lang.Override
+  public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
+    unknownFields.writeTo(output);
+  }
+
+  @java.lang.Override
+  public int getSerializedSize() {
+    int size = memoizedSize;
+    if (size != -1) return size;
+
+    size = 0;
+    size += unknownFields.getSerializedSize();
+    memoizedSize = size;
+    return size;
+  }
+
+  @java.lang.Override
+  public boolean equals(final java.lang.Object obj) {
+    if (obj == this) {
+      return true;
+    }
+    if (!(obj instanceof com.google.cloud.retail.v2.PurgeMetadata)) {
+      return super.equals(obj);
+    }
+    com.google.cloud.retail.v2.PurgeMetadata other = (com.google.cloud.retail.v2.PurgeMetadata) obj;
+
+    if (!unknownFields.equals(other.unknownFields)) return false;
+    return true;
+  }
+
+  @java.lang.Override
+  public int hashCode() {
+    if (memoizedHashCode != 0) {
+      return memoizedHashCode;
+    }
+    int hash = 41;
+    hash = (19 * hash) + getDescriptor().hashCode();
+    hash = (29 * hash) + unknownFields.hashCode();
+    memoizedHashCode = hash;
+    return hash;
+  }
+
+  public static com.google.cloud.retail.v2.PurgeMetadata parseFrom(java.nio.ByteBuffer data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.PurgeMetadata parseFrom(
+      java.nio.ByteBuffer data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.PurgeMetadata parseFrom(
+      com.google.protobuf.ByteString data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.PurgeMetadata parseFrom(
+      com.google.protobuf.ByteString data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.PurgeMetadata parseFrom(byte[] data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.PurgeMetadata parseFrom(
+      byte[] data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.PurgeMetadata parseFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.PurgeMetadata parseFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.PurgeMetadata parseDelimitedFrom(
+      java.io.InputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.PurgeMetadata parseDelimitedFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.PurgeMetadata parseFrom(
+      com.google.protobuf.CodedInputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.PurgeMetadata parseFrom(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  @java.lang.Override
+  public Builder newBuilderForType() {
+    return newBuilder();
+  }
+
+  public static Builder newBuilder() {
+    return DEFAULT_INSTANCE.toBuilder();
+  }
+
+  public static Builder newBuilder(com.google.cloud.retail.v2.PurgeMetadata prototype) {
+    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+  }
+
+  @java.lang.Override
+  public Builder toBuilder() {
+    return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
+  }
+
+  @java.lang.Override
+  protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+    Builder builder = new Builder(parent);
+    return builder;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Metadata related to the progress of the Purge operation.
+   * This will be returned by the google.longrunning.Operation.metadata field.
+   * </pre>
+   *
+   * Protobuf type {@code google.cloud.retail.v2.PurgeMetadata}
+   */
+  public static final class Builder extends com.google.protobuf.GeneratedMessageV3.Builder<Builder>
+      implements
+      // @@protoc_insertion_point(builder_implements:google.cloud.retail.v2.PurgeMetadata)
+      com.google.cloud.retail.v2.PurgeMetadataOrBuilder {
+    public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+      return com.google.cloud.retail.v2.PurgeConfigProto
+          .internal_static_google_cloud_retail_v2_PurgeMetadata_descriptor;
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return com.google.cloud.retail.v2.PurgeConfigProto
+          .internal_static_google_cloud_retail_v2_PurgeMetadata_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              com.google.cloud.retail.v2.PurgeMetadata.class,
+              com.google.cloud.retail.v2.PurgeMetadata.Builder.class);
+    }
+
+    // Construct using com.google.cloud.retail.v2.PurgeMetadata.newBuilder()
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
+
+    private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+      super(parent);
+      maybeForceBuilderInitialization();
+    }
+
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders) {}
+    }
+
+    @java.lang.Override
+    public Builder clear() {
+      super.clear();
+      return this;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
+      return com.google.cloud.retail.v2.PurgeConfigProto
+          .internal_static_google_cloud_retail_v2_PurgeMetadata_descriptor;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.PurgeMetadata getDefaultInstanceForType() {
+      return com.google.cloud.retail.v2.PurgeMetadata.getDefaultInstance();
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.PurgeMetadata build() {
+      com.google.cloud.retail.v2.PurgeMetadata result = buildPartial();
+      if (!result.isInitialized()) {
+        throw newUninitializedMessageException(result);
+      }
+      return result;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.PurgeMetadata buildPartial() {
+      com.google.cloud.retail.v2.PurgeMetadata result =
+          new com.google.cloud.retail.v2.PurgeMetadata(this);
+      onBuilt();
+      return result;
+    }
+
+    @java.lang.Override
+    public Builder clone() {
+      return super.clone();
+    }
+
+    @java.lang.Override
+    public Builder setField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.setField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
+      return super.clearField(field);
+    }
+
+    @java.lang.Override
+    public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+      return super.clearOneof(oneof);
+    }
+
+    @java.lang.Override
+    public Builder setRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, int index, java.lang.Object value) {
+      return super.setRepeatedField(field, index, value);
+    }
+
+    @java.lang.Override
+    public Builder addRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.addRepeatedField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(com.google.protobuf.Message other) {
+      if (other instanceof com.google.cloud.retail.v2.PurgeMetadata) {
+        return mergeFrom((com.google.cloud.retail.v2.PurgeMetadata) other);
+      } else {
+        super.mergeFrom(other);
+        return this;
+      }
+    }
+
+    public Builder mergeFrom(com.google.cloud.retail.v2.PurgeMetadata other) {
+      if (other == com.google.cloud.retail.v2.PurgeMetadata.getDefaultInstance()) return this;
+      this.mergeUnknownFields(other.unknownFields);
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final boolean isInitialized() {
+      return true;
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      com.google.cloud.retail.v2.PurgeMetadata parsedMessage = null;
+      try {
+        parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        parsedMessage = (com.google.cloud.retail.v2.PurgeMetadata) e.getUnfinishedMessage();
+        throw e.unwrapIOException();
+      } finally {
+        if (parsedMessage != null) {
+          mergeFrom(parsedMessage);
+        }
+      }
+      return this;
+    }
+
+    @java.lang.Override
+    public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.setUnknownFields(unknownFields);
+    }
+
+    @java.lang.Override
+    public final Builder mergeUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.mergeUnknownFields(unknownFields);
+    }
+
+    // @@protoc_insertion_point(builder_scope:google.cloud.retail.v2.PurgeMetadata)
+  }
+
+  // @@protoc_insertion_point(class_scope:google.cloud.retail.v2.PurgeMetadata)
+  private static final com.google.cloud.retail.v2.PurgeMetadata DEFAULT_INSTANCE;
+
+  static {
+    DEFAULT_INSTANCE = new com.google.cloud.retail.v2.PurgeMetadata();
+  }
+
+  public static com.google.cloud.retail.v2.PurgeMetadata getDefaultInstance() {
+    return DEFAULT_INSTANCE;
+  }
+
+  private static final com.google.protobuf.Parser<PurgeMetadata> PARSER =
+      new com.google.protobuf.AbstractParser<PurgeMetadata>() {
+        @java.lang.Override
+        public PurgeMetadata parsePartialFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws com.google.protobuf.InvalidProtocolBufferException {
+          return new PurgeMetadata(input, extensionRegistry);
+        }
+      };
+
+  public static com.google.protobuf.Parser<PurgeMetadata> parser() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.protobuf.Parser<PurgeMetadata> getParserForType() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.cloud.retail.v2.PurgeMetadata getDefaultInstanceForType() {
+    return DEFAULT_INSTANCE;
+  }
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/PurgeMetadataOrBuilder.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/PurgeMetadataOrBuilder.java
new file mode 100644
index 00000000..e9635670
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/PurgeMetadataOrBuilder.java
@@ -0,0 +1,24 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/purge_config.proto
+
+package com.google.cloud.retail.v2;
+
+public interface PurgeMetadataOrBuilder
+    extends
+    // @@protoc_insertion_point(interface_extends:google.cloud.retail.v2.PurgeMetadata)
+    com.google.protobuf.MessageOrBuilder {}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/PurgeUserEventsRequest.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/PurgeUserEventsRequest.java
new file mode 100644
index 00000000..3dc4d338
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/PurgeUserEventsRequest.java
@@ -0,0 +1,1053 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/purge_config.proto
+
+package com.google.cloud.retail.v2;
+
+/**
+ *
+ *
+ * <pre>
+ * Request message for PurgeUserEvents method.
+ * </pre>
+ *
+ * Protobuf type {@code google.cloud.retail.v2.PurgeUserEventsRequest}
+ */
+public final class PurgeUserEventsRequest extends com.google.protobuf.GeneratedMessageV3
+    implements
+    // @@protoc_insertion_point(message_implements:google.cloud.retail.v2.PurgeUserEventsRequest)
+    PurgeUserEventsRequestOrBuilder {
+  private static final long serialVersionUID = 0L;
+  // Use PurgeUserEventsRequest.newBuilder() to construct.
+  private PurgeUserEventsRequest(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+    super(builder);
+  }
+
+  private PurgeUserEventsRequest() {
+    parent_ = "";
+    filter_ = "";
+  }
+
+  @java.lang.Override
+  @SuppressWarnings({"unused"})
+  protected java.lang.Object newInstance(UnusedPrivateParameter unused) {
+    return new PurgeUserEventsRequest();
+  }
+
+  @java.lang.Override
+  public final com.google.protobuf.UnknownFieldSet getUnknownFields() {
+    return this.unknownFields;
+  }
+
+  private PurgeUserEventsRequest(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    this();
+    if (extensionRegistry == null) {
+      throw new java.lang.NullPointerException();
+    }
+    com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+        com.google.protobuf.UnknownFieldSet.newBuilder();
+    try {
+      boolean done = false;
+      while (!done) {
+        int tag = input.readTag();
+        switch (tag) {
+          case 0:
+            done = true;
+            break;
+          case 10:
+            {
+              java.lang.String s = input.readStringRequireUtf8();
+
+              parent_ = s;
+              break;
+            }
+          case 18:
+            {
+              java.lang.String s = input.readStringRequireUtf8();
+
+              filter_ = s;
+              break;
+            }
+          case 24:
+            {
+              force_ = input.readBool();
+              break;
+            }
+          default:
+            {
+              if (!parseUnknownField(input, unknownFields, extensionRegistry, tag)) {
+                done = true;
+              }
+              break;
+            }
+        }
+      }
+    } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+      throw e.setUnfinishedMessage(this);
+    } catch (java.io.IOException e) {
+      throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
+    } finally {
+      this.unknownFields = unknownFields.build();
+      makeExtensionsImmutable();
+    }
+  }
+
+  public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+    return com.google.cloud.retail.v2.PurgeConfigProto
+        .internal_static_google_cloud_retail_v2_PurgeUserEventsRequest_descriptor;
+  }
+
+  @java.lang.Override
+  protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internalGetFieldAccessorTable() {
+    return com.google.cloud.retail.v2.PurgeConfigProto
+        .internal_static_google_cloud_retail_v2_PurgeUserEventsRequest_fieldAccessorTable
+        .ensureFieldAccessorsInitialized(
+            com.google.cloud.retail.v2.PurgeUserEventsRequest.class,
+            com.google.cloud.retail.v2.PurgeUserEventsRequest.Builder.class);
+  }
+
+  public static final int PARENT_FIELD_NUMBER = 1;
+  private volatile java.lang.Object parent_;
+  /**
+   *
+   *
+   * <pre>
+   * Required. The resource name of the catalog under which the events are
+   * created. The format is
+   * "projects/${projectId}/locations/global/catalogs/${catalogId}"
+   * </pre>
+   *
+   * <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The parent.
+   */
+  @java.lang.Override
+  public java.lang.String getParent() {
+    java.lang.Object ref = parent_;
+    if (ref instanceof java.lang.String) {
+      return (java.lang.String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+      java.lang.String s = bs.toStringUtf8();
+      parent_ = s;
+      return s;
+    }
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Required. The resource name of the catalog under which the events are
+   * created. The format is
+   * "projects/${projectId}/locations/global/catalogs/${catalogId}"
+   * </pre>
+   *
+   * <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The bytes for parent.
+   */
+  @java.lang.Override
+  public com.google.protobuf.ByteString getParentBytes() {
+    java.lang.Object ref = parent_;
+    if (ref instanceof java.lang.String) {
+      com.google.protobuf.ByteString b =
+          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+      parent_ = b;
+      return b;
+    } else {
+      return (com.google.protobuf.ByteString) ref;
+    }
+  }
+
+  public static final int FILTER_FIELD_NUMBER = 2;
+  private volatile java.lang.Object filter_;
+  /**
+   *
+   *
+   * <pre>
+   * Required. The filter string to specify the events to be deleted with a
+   * length limit of 5,000 characters. Empty string filter is not allowed. The
+   * eligible fields for filtering are:
+   * * `eventType`: Double quoted
+   * [UserEvent.event_type][google.cloud.retail.v2.UserEvent.event_type] string.
+   * * `eventTime`: in ISO 8601 "zulu" format.
+   * * `visitorId`: Double quoted string. Specifying this will delete all
+   *   events associated with a visitor.
+   * * `userId`: Double quoted string. Specifying this will delete all events
+   *   associated with a user.
+   * Examples:
+   * * Deleting all events in a time range:
+   *   `eventTime &gt; "2012-04-23T18:25:43.511Z"
+   *   eventTime &lt; "2012-04-23T18:30:43.511Z"`
+   * * Deleting specific eventType in time range:
+   *   `eventTime &gt; "2012-04-23T18:25:43.511Z" eventType = "detail-page-view"`
+   * * Deleting all events for a specific visitor:
+   *   `visitorId = "visitor1024"`
+   * The filtering fields are assumed to have an implicit AND.
+   * </pre>
+   *
+   * <code>string filter = 2 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The filter.
+   */
+  @java.lang.Override
+  public java.lang.String getFilter() {
+    java.lang.Object ref = filter_;
+    if (ref instanceof java.lang.String) {
+      return (java.lang.String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+      java.lang.String s = bs.toStringUtf8();
+      filter_ = s;
+      return s;
+    }
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Required. The filter string to specify the events to be deleted with a
+   * length limit of 5,000 characters. Empty string filter is not allowed. The
+   * eligible fields for filtering are:
+   * * `eventType`: Double quoted
+   * [UserEvent.event_type][google.cloud.retail.v2.UserEvent.event_type] string.
+   * * `eventTime`: in ISO 8601 "zulu" format.
+   * * `visitorId`: Double quoted string. Specifying this will delete all
+   *   events associated with a visitor.
+   * * `userId`: Double quoted string. Specifying this will delete all events
+   *   associated with a user.
+   * Examples:
+   * * Deleting all events in a time range:
+   *   `eventTime &gt; "2012-04-23T18:25:43.511Z"
+   *   eventTime &lt; "2012-04-23T18:30:43.511Z"`
+   * * Deleting specific eventType in time range:
+   *   `eventTime &gt; "2012-04-23T18:25:43.511Z" eventType = "detail-page-view"`
+   * * Deleting all events for a specific visitor:
+   *   `visitorId = "visitor1024"`
+   * The filtering fields are assumed to have an implicit AND.
+   * </pre>
+   *
+   * <code>string filter = 2 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The bytes for filter.
+   */
+  @java.lang.Override
+  public com.google.protobuf.ByteString getFilterBytes() {
+    java.lang.Object ref = filter_;
+    if (ref instanceof java.lang.String) {
+      com.google.protobuf.ByteString b =
+          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+      filter_ = b;
+      return b;
+    } else {
+      return (com.google.protobuf.ByteString) ref;
+    }
+  }
+
+  public static final int FORCE_FIELD_NUMBER = 3;
+  private boolean force_;
+  /**
+   *
+   *
+   * <pre>
+   * Actually perform the purge.
+   * If `force` is set to false, the method will return the expected purge count
+   * without deleting any user events.
+   * </pre>
+   *
+   * <code>bool force = 3;</code>
+   *
+   * @return The force.
+   */
+  @java.lang.Override
+  public boolean getForce() {
+    return force_;
+  }
+
+  private byte memoizedIsInitialized = -1;
+
+  @java.lang.Override
+  public final boolean isInitialized() {
+    byte isInitialized = memoizedIsInitialized;
+    if (isInitialized == 1) return true;
+    if (isInitialized == 0) return false;
+
+    memoizedIsInitialized = 1;
+    return true;
+  }
+
+  @java.lang.Override
+  public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
+    if (!getParentBytes().isEmpty()) {
+      com.google.protobuf.GeneratedMessageV3.writeString(output, 1, parent_);
+    }
+    if (!getFilterBytes().isEmpty()) {
+      com.google.protobuf.GeneratedMessageV3.writeString(output, 2, filter_);
+    }
+    if (force_ != false) {
+      output.writeBool(3, force_);
+    }
+    unknownFields.writeTo(output);
+  }
+
+  @java.lang.Override
+  public int getSerializedSize() {
+    int size = memoizedSize;
+    if (size != -1) return size;
+
+    size = 0;
+    if (!getParentBytes().isEmpty()) {
+      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(1, parent_);
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+    if (!getFilterBytes().isEmpty()) {
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+    }
+    if (force_ != false) {
+      size += com.google.protobuf.CodedOutputStream.computeBoolSize(3, force_);
+    }
+    size += unknownFields.getSerializedSize();
+    memoizedSize = size;
+    return size;
+  }
+
+  @java.lang.Override
+  public boolean equals(final java.lang.Object obj) {
+    if (obj == this) {
+      return true;
+    }
+    if (!(obj instanceof com.google.cloud.retail.v2.PurgeUserEventsRequest)) {
+      return super.equals(obj);
+    }
+    com.google.cloud.retail.v2.PurgeUserEventsRequest other =
+        (com.google.cloud.retail.v2.PurgeUserEventsRequest) obj;
+
+    if (!getParent().equals(other.getParent())) return false;
+    if (!getFilter().equals(other.getFilter())) return false;
+    if (getForce() != other.getForce()) return false;
+    if (!unknownFields.equals(other.unknownFields)) return false;
+    return true;
+  }
+
+  @java.lang.Override
+  public int hashCode() {
+    if (memoizedHashCode != 0) {
+      return memoizedHashCode;
+    }
+    int hash = 41;
+    hash = (19 * hash) + getDescriptor().hashCode();
+    hash = (37 * hash) + PARENT_FIELD_NUMBER;
+    hash = (53 * hash) + getParent().hashCode();
+    hash = (37 * hash) + FILTER_FIELD_NUMBER;
+    hash = (53 * hash) + getFilter().hashCode();
+    hash = (37 * hash) + FORCE_FIELD_NUMBER;
+    hash = (53 * hash) + com.google.protobuf.Internal.hashBoolean(getForce());
+    hash = (29 * hash) + unknownFields.hashCode();
+    memoizedHashCode = hash;
+    return hash;
+  }
+
+  public static com.google.cloud.retail.v2.PurgeUserEventsRequest parseFrom(
+      java.nio.ByteBuffer data) throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.PurgeUserEventsRequest parseFrom(
+      java.nio.ByteBuffer data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.PurgeUserEventsRequest parseFrom(
+      com.google.protobuf.ByteString data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.PurgeUserEventsRequest parseFrom(
+      com.google.protobuf.ByteString data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.PurgeUserEventsRequest parseFrom(byte[] data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.PurgeUserEventsRequest parseFrom(
+      byte[] data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.PurgeUserEventsRequest parseFrom(
+      java.io.InputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.PurgeUserEventsRequest parseFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.PurgeUserEventsRequest parseDelimitedFrom(
+      java.io.InputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.PurgeUserEventsRequest parseDelimitedFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.PurgeUserEventsRequest parseFrom(
+      com.google.protobuf.CodedInputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.PurgeUserEventsRequest parseFrom(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  @java.lang.Override
+  public Builder newBuilderForType() {
+    return newBuilder();
+  }
+
+  public static Builder newBuilder() {
+    return DEFAULT_INSTANCE.toBuilder();
+  }
+
+  public static Builder newBuilder(com.google.cloud.retail.v2.PurgeUserEventsRequest prototype) {
+    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+  }
+
+  @java.lang.Override
+  public Builder toBuilder() {
+    return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
+  }
+
+  @java.lang.Override
+  protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+    Builder builder = new Builder(parent);
+    return builder;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Request message for PurgeUserEvents method.
+   * </pre>
+   *
+   * Protobuf type {@code google.cloud.retail.v2.PurgeUserEventsRequest}
+   */
+  public static final class Builder extends com.google.protobuf.GeneratedMessageV3.Builder<Builder>
+      implements
+      // @@protoc_insertion_point(builder_implements:google.cloud.retail.v2.PurgeUserEventsRequest)
+      com.google.cloud.retail.v2.PurgeUserEventsRequestOrBuilder {
+    public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+      return com.google.cloud.retail.v2.PurgeConfigProto
+          .internal_static_google_cloud_retail_v2_PurgeUserEventsRequest_descriptor;
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return com.google.cloud.retail.v2.PurgeConfigProto
+          .internal_static_google_cloud_retail_v2_PurgeUserEventsRequest_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              com.google.cloud.retail.v2.PurgeUserEventsRequest.class,
+              com.google.cloud.retail.v2.PurgeUserEventsRequest.Builder.class);
+    }
+
+    // Construct using com.google.cloud.retail.v2.PurgeUserEventsRequest.newBuilder()
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
+
+    private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+      super(parent);
+      maybeForceBuilderInitialization();
+    }
+
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders) {}
+    }
+
+    @java.lang.Override
+    public Builder clear() {
+      super.clear();
+      parent_ = "";
+
+      filter_ = "";
+
+      force_ = false;
+
+      return this;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
+      return com.google.cloud.retail.v2.PurgeConfigProto
+          .internal_static_google_cloud_retail_v2_PurgeUserEventsRequest_descriptor;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.PurgeUserEventsRequest getDefaultInstanceForType() {
+      return com.google.cloud.retail.v2.PurgeUserEventsRequest.getDefaultInstance();
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.PurgeUserEventsRequest build() {
+      com.google.cloud.retail.v2.PurgeUserEventsRequest result = buildPartial();
+      if (!result.isInitialized()) {
+        throw newUninitializedMessageException(result);
+      }
+      return result;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.PurgeUserEventsRequest buildPartial() {
+      com.google.cloud.retail.v2.PurgeUserEventsRequest result =
+          new com.google.cloud.retail.v2.PurgeUserEventsRequest(this);
+      result.parent_ = parent_;
+      result.filter_ = filter_;
+      result.force_ = force_;
+      onBuilt();
+      return result;
+    }
+
+    @java.lang.Override
+    public Builder clone() {
+      return super.clone();
+    }
+
+    @java.lang.Override
+    public Builder setField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.setField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
+      return super.clearField(field);
+    }
+
+    @java.lang.Override
+    public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+      return super.clearOneof(oneof);
+    }
+
+    @java.lang.Override
+    public Builder setRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, int index, java.lang.Object value) {
+      return super.setRepeatedField(field, index, value);
+    }
+
+    @java.lang.Override
+    public Builder addRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.addRepeatedField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(com.google.protobuf.Message other) {
+      if (other instanceof com.google.cloud.retail.v2.PurgeUserEventsRequest) {
+        return mergeFrom((com.google.cloud.retail.v2.PurgeUserEventsRequest) other);
+      } else {
+        super.mergeFrom(other);
+        return this;
+      }
+    }
+
+    public Builder mergeFrom(com.google.cloud.retail.v2.PurgeUserEventsRequest other) {
+      if (other == com.google.cloud.retail.v2.PurgeUserEventsRequest.getDefaultInstance())
+        return this;
+      if (!other.getParent().isEmpty()) {
+        parent_ = other.parent_;
+        onChanged();
+      }
+      if (!other.getFilter().isEmpty()) {
+        filter_ = other.filter_;
+        onChanged();
+      }
+      if (other.getForce() != false) {
+        setForce(other.getForce());
+      }
+      this.mergeUnknownFields(other.unknownFields);
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final boolean isInitialized() {
+      return true;
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      com.google.cloud.retail.v2.PurgeUserEventsRequest parsedMessage = null;
+      try {
+        parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        parsedMessage =
+            (com.google.cloud.retail.v2.PurgeUserEventsRequest) e.getUnfinishedMessage();
+        throw e.unwrapIOException();
+      } finally {
+        if (parsedMessage != null) {
+          mergeFrom(parsedMessage);
+        }
+      }
+      return this;
+    }
+
+    private java.lang.Object parent_ = "";
+    /**
+     *
+     *
+     * <pre>
+     * Required. The resource name of the catalog under which the events are
+     * created. The format is
+     * "projects/${projectId}/locations/global/catalogs/${catalogId}"
+     * </pre>
+     *
+     * <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @return The parent.
+     */
+    public java.lang.String getParent() {
+      java.lang.Object ref = parent_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        parent_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The resource name of the catalog under which the events are
+     * created. The format is
+     * "projects/${projectId}/locations/global/catalogs/${catalogId}"
+     * </pre>
+     *
+     * <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @return The bytes for parent.
+     */
+    public com.google.protobuf.ByteString getParentBytes() {
+      java.lang.Object ref = parent_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b =
+            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+        parent_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The resource name of the catalog under which the events are
+     * created. The format is
+     * "projects/${projectId}/locations/global/catalogs/${catalogId}"
+     * </pre>
+     *
+     * <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @param value The parent to set.
+     * @return This builder for chaining.
+     */
+    public Builder setParent(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+
+      parent_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The resource name of the catalog under which the events are
+     * created. The format is
+     * "projects/${projectId}/locations/global/catalogs/${catalogId}"
+     * </pre>
+     *
+     * <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearParent() {
+
+      parent_ = getDefaultInstance().getParent();
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The resource name of the catalog under which the events are
+     * created. The format is
+     * "projects/${projectId}/locations/global/catalogs/${catalogId}"
+     * </pre>
+     *
+     * <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @param value The bytes for parent to set.
+     * @return This builder for chaining.
+     */
+    public Builder setParentBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+
+      parent_ = value;
+      onChanged();
+      return this;
+    }
+
+    private java.lang.Object filter_ = "";
+    /**
+     *
+     *
+     * <pre>
+     * Required. The filter string to specify the events to be deleted with a
+     * length limit of 5,000 characters. Empty string filter is not allowed. The
+     * eligible fields for filtering are:
+     * * `eventType`: Double quoted
+     * [UserEvent.event_type][google.cloud.retail.v2.UserEvent.event_type] string.
+     * * `eventTime`: in ISO 8601 "zulu" format.
+     * * `visitorId`: Double quoted string. Specifying this will delete all
+     *   events associated with a visitor.
+     * * `userId`: Double quoted string. Specifying this will delete all events
+     *   associated with a user.
+     * Examples:
+     * * Deleting all events in a time range:
+     *   `eventTime &gt; "2012-04-23T18:25:43.511Z"
+     *   eventTime &lt; "2012-04-23T18:30:43.511Z"`
+     * * Deleting specific eventType in time range:
+     *   `eventTime &gt; "2012-04-23T18:25:43.511Z" eventType = "detail-page-view"`
+     * * Deleting all events for a specific visitor:
+     *   `visitorId = "visitor1024"`
+     * The filtering fields are assumed to have an implicit AND.
+     * </pre>
+     *
+     * <code>string filter = 2 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @return The filter.
+     */
+    public java.lang.String getFilter() {
+      java.lang.Object ref = filter_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        filter_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The filter string to specify the events to be deleted with a
+     * length limit of 5,000 characters. Empty string filter is not allowed. The
+     * eligible fields for filtering are:
+     * * `eventType`: Double quoted
+     * [UserEvent.event_type][google.cloud.retail.v2.UserEvent.event_type] string.
+     * * `eventTime`: in ISO 8601 "zulu" format.
+     * * `visitorId`: Double quoted string. Specifying this will delete all
+     *   events associated with a visitor.
+     * * `userId`: Double quoted string. Specifying this will delete all events
+     *   associated with a user.
+     * Examples:
+     * * Deleting all events in a time range:
+     *   `eventTime &gt; "2012-04-23T18:25:43.511Z"
+     *   eventTime &lt; "2012-04-23T18:30:43.511Z"`
+     * * Deleting specific eventType in time range:
+     *   `eventTime &gt; "2012-04-23T18:25:43.511Z" eventType = "detail-page-view"`
+     * * Deleting all events for a specific visitor:
+     *   `visitorId = "visitor1024"`
+     * The filtering fields are assumed to have an implicit AND.
+     * </pre>
+     *
+     * <code>string filter = 2 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @return The bytes for filter.
+     */
+    public com.google.protobuf.ByteString getFilterBytes() {
+      java.lang.Object ref = filter_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b =
+            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+        filter_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The filter string to specify the events to be deleted with a
+     * length limit of 5,000 characters. Empty string filter is not allowed. The
+     * eligible fields for filtering are:
+     * * `eventType`: Double quoted
+     * [UserEvent.event_type][google.cloud.retail.v2.UserEvent.event_type] string.
+     * * `eventTime`: in ISO 8601 "zulu" format.
+     * * `visitorId`: Double quoted string. Specifying this will delete all
+     *   events associated with a visitor.
+     * * `userId`: Double quoted string. Specifying this will delete all events
+     *   associated with a user.
+     * Examples:
+     * * Deleting all events in a time range:
+     *   `eventTime &gt; "2012-04-23T18:25:43.511Z"
+     *   eventTime &lt; "2012-04-23T18:30:43.511Z"`
+     * * Deleting specific eventType in time range:
+     *   `eventTime &gt; "2012-04-23T18:25:43.511Z" eventType = "detail-page-view"`
+     * * Deleting all events for a specific visitor:
+     *   `visitorId = "visitor1024"`
+     * The filtering fields are assumed to have an implicit AND.
+     * </pre>
+     *
+     * <code>string filter = 2 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @param value The filter to set.
+     * @return This builder for chaining.
+     */
+    public Builder setFilter(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+
+      filter_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The filter string to specify the events to be deleted with a
+     * length limit of 5,000 characters. Empty string filter is not allowed. The
+     * eligible fields for filtering are:
+     * * `eventType`: Double quoted
+     * [UserEvent.event_type][google.cloud.retail.v2.UserEvent.event_type] string.
+     * * `eventTime`: in ISO 8601 "zulu" format.
+     * * `visitorId`: Double quoted string. Specifying this will delete all
+     *   events associated with a visitor.
+     * * `userId`: Double quoted string. Specifying this will delete all events
+     *   associated with a user.
+     * Examples:
+     * * Deleting all events in a time range:
+     *   `eventTime &gt; "2012-04-23T18:25:43.511Z"
+     *   eventTime &lt; "2012-04-23T18:30:43.511Z"`
+     * * Deleting specific eventType in time range:
+     *   `eventTime &gt; "2012-04-23T18:25:43.511Z" eventType = "detail-page-view"`
+     * * Deleting all events for a specific visitor:
+     *   `visitorId = "visitor1024"`
+     * The filtering fields are assumed to have an implicit AND.
+     * </pre>
+     *
+     * <code>string filter = 2 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearFilter() {
+
+      filter_ = getDefaultInstance().getFilter();
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The filter string to specify the events to be deleted with a
+     * length limit of 5,000 characters. Empty string filter is not allowed. The
+     * eligible fields for filtering are:
+     * * `eventType`: Double quoted
+     * [UserEvent.event_type][google.cloud.retail.v2.UserEvent.event_type] string.
+     * * `eventTime`: in ISO 8601 "zulu" format.
+     * * `visitorId`: Double quoted string. Specifying this will delete all
+     *   events associated with a visitor.
+     * * `userId`: Double quoted string. Specifying this will delete all events
+     *   associated with a user.
+     * Examples:
+     * * Deleting all events in a time range:
+     *   `eventTime &gt; "2012-04-23T18:25:43.511Z"
+     *   eventTime &lt; "2012-04-23T18:30:43.511Z"`
+     * * Deleting specific eventType in time range:
+     *   `eventTime &gt; "2012-04-23T18:25:43.511Z" eventType = "detail-page-view"`
+     * * Deleting all events for a specific visitor:
+     *   `visitorId = "visitor1024"`
+     * The filtering fields are assumed to have an implicit AND.
+     * </pre>
+     *
+     * <code>string filter = 2 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @param value The bytes for filter to set.
+     * @return This builder for chaining.
+     */
+    public Builder setFilterBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+
+      filter_ = value;
+      onChanged();
+      return this;
+    }
+
+    private boolean force_;
+    /**
+     *
+     *
+     * <pre>
+     * Actually perform the purge.
+     * If `force` is set to false, the method will return the expected purge count
+     * without deleting any user events.
+     * </pre>
+     *
+     * <code>bool force = 3;</code>
+     *
+     * @return The force.
+     */
+    @java.lang.Override
+    public boolean getForce() {
+      return force_;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Actually perform the purge.
+     * If `force` is set to false, the method will return the expected purge count
+     * without deleting any user events.
+     * </pre>
+     *
+     * <code>bool force = 3;</code>
+     *
+     * @param value The force to set.
+     * @return This builder for chaining.
+     */
+    public Builder setForce(boolean value) {
+
+      force_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Actually perform the purge.
+     * If `force` is set to false, the method will return the expected purge count
+     * without deleting any user events.
+     * </pre>
+     *
+     * <code>bool force = 3;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearForce() {
+
+      force_ = false;
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.setUnknownFields(unknownFields);
+    }
+
+    @java.lang.Override
+    public final Builder mergeUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.mergeUnknownFields(unknownFields);
+    }
+
+    // @@protoc_insertion_point(builder_scope:google.cloud.retail.v2.PurgeUserEventsRequest)
+  }
+
+  // @@protoc_insertion_point(class_scope:google.cloud.retail.v2.PurgeUserEventsRequest)
+  private static final com.google.cloud.retail.v2.PurgeUserEventsRequest DEFAULT_INSTANCE;
+
+  static {
+    DEFAULT_INSTANCE = new com.google.cloud.retail.v2.PurgeUserEventsRequest();
+  }
+
+  public static com.google.cloud.retail.v2.PurgeUserEventsRequest getDefaultInstance() {
+    return DEFAULT_INSTANCE;
+  }
+
+  private static final com.google.protobuf.Parser<PurgeUserEventsRequest> PARSER =
+      new com.google.protobuf.AbstractParser<PurgeUserEventsRequest>() {
+        @java.lang.Override
+        public PurgeUserEventsRequest parsePartialFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws com.google.protobuf.InvalidProtocolBufferException {
+          return new PurgeUserEventsRequest(input, extensionRegistry);
+        }
+      };
+
+  public static com.google.protobuf.Parser<PurgeUserEventsRequest> parser() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.protobuf.Parser<PurgeUserEventsRequest> getParserForType() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.cloud.retail.v2.PurgeUserEventsRequest getDefaultInstanceForType() {
+    return DEFAULT_INSTANCE;
+  }
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/PurgeUserEventsRequestOrBuilder.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/PurgeUserEventsRequestOrBuilder.java
new file mode 100644
index 00000000..c1df01e5
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/PurgeUserEventsRequestOrBuilder.java
@@ -0,0 +1,130 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/purge_config.proto
+
+package com.google.cloud.retail.v2;
+
+public interface PurgeUserEventsRequestOrBuilder
+    extends
+    // @@protoc_insertion_point(interface_extends:google.cloud.retail.v2.PurgeUserEventsRequest)
+    com.google.protobuf.MessageOrBuilder {
+
+  /**
+   *
+   *
+   * <pre>
+   * Required. The resource name of the catalog under which the events are
+   * created. The format is
+   * "projects/${projectId}/locations/global/catalogs/${catalogId}"
+   * </pre>
+   *
+   * <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The parent.
+   */
+  java.lang.String getParent();
+  /**
+   *
+   *
+   * <pre>
+   * Required. The resource name of the catalog under which the events are
+   * created. The format is
+   * "projects/${projectId}/locations/global/catalogs/${catalogId}"
+   * </pre>
+   *
+   * <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The bytes for parent.
+   */
+  com.google.protobuf.ByteString getParentBytes();
+
+  /**
+   *
+   *
+   * <pre>
+   * Required. The filter string to specify the events to be deleted with a
+   * length limit of 5,000 characters. Empty string filter is not allowed. The
+   * eligible fields for filtering are:
+   * * `eventType`: Double quoted
+   * [UserEvent.event_type][google.cloud.retail.v2.UserEvent.event_type] string.
+   * * `eventTime`: in ISO 8601 "zulu" format.
+   * * `visitorId`: Double quoted string. Specifying this will delete all
+   *   events associated with a visitor.
+   * * `userId`: Double quoted string. Specifying this will delete all events
+   *   associated with a user.
+   * Examples:
+   * * Deleting all events in a time range:
+   *   `eventTime &gt; "2012-04-23T18:25:43.511Z"
+   *   eventTime &lt; "2012-04-23T18:30:43.511Z"`
+   * * Deleting specific eventType in time range:
+   *   `eventTime &gt; "2012-04-23T18:25:43.511Z" eventType = "detail-page-view"`
+   * * Deleting all events for a specific visitor:
+   *   `visitorId = "visitor1024"`
+   * The filtering fields are assumed to have an implicit AND.
+   * </pre>
+   *
+   * <code>string filter = 2 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The filter.
+   */
+  java.lang.String getFilter();
+  /**
+   *
+   *
+   * <pre>
+   * Required. The filter string to specify the events to be deleted with a
+   * length limit of 5,000 characters. Empty string filter is not allowed. The
+   * eligible fields for filtering are:
+   * * `eventType`: Double quoted
+   * [UserEvent.event_type][google.cloud.retail.v2.UserEvent.event_type] string.
+   * * `eventTime`: in ISO 8601 "zulu" format.
+   * * `visitorId`: Double quoted string. Specifying this will delete all
+   *   events associated with a visitor.
+   * * `userId`: Double quoted string. Specifying this will delete all events
+   *   associated with a user.
+   * Examples:
+   * * Deleting all events in a time range:
+   *   `eventTime &gt; "2012-04-23T18:25:43.511Z"
+   *   eventTime &lt; "2012-04-23T18:30:43.511Z"`
+   * * Deleting specific eventType in time range:
+   *   `eventTime &gt; "2012-04-23T18:25:43.511Z" eventType = "detail-page-view"`
+   * * Deleting all events for a specific visitor:
+   *   `visitorId = "visitor1024"`
+   * The filtering fields are assumed to have an implicit AND.
+   * </pre>
+   *
+   * <code>string filter = 2 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The bytes for filter.
+   */
+  com.google.protobuf.ByteString getFilterBytes();
+
+  /**
+   *
+   *
+   * <pre>
+   * Actually perform the purge.
+   * If `force` is set to false, the method will return the expected purge count
+   * without deleting any user events.
+   * </pre>
+   *
+   * <code>bool force = 3;</code>
+   *
+   * @return The force.
+   */
+  boolean getForce();
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/PurgeUserEventsResponse.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/PurgeUserEventsResponse.java
new file mode 100644
index 00000000..296f0b5a
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/PurgeUserEventsResponse.java
@@ -0,0 +1,550 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/purge_config.proto
+
+package com.google.cloud.retail.v2;
+
+/**
+ *
+ *
+ * <pre>
+ * Response of the PurgeUserEventsRequest. If the long running operation is
+ * successfully done, then this message is returned by the
+ * google.longrunning.Operations.response field.
+ * </pre>
+ *
+ * Protobuf type {@code google.cloud.retail.v2.PurgeUserEventsResponse}
+ */
+public final class PurgeUserEventsResponse extends com.google.protobuf.GeneratedMessageV3
+    implements
+    // @@protoc_insertion_point(message_implements:google.cloud.retail.v2.PurgeUserEventsResponse)
+    PurgeUserEventsResponseOrBuilder {
+  private static final long serialVersionUID = 0L;
+  // Use PurgeUserEventsResponse.newBuilder() to construct.
+  private PurgeUserEventsResponse(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+    super(builder);
+  }
+
+  private PurgeUserEventsResponse() {}
+
+  @java.lang.Override
+  @SuppressWarnings({"unused"})
+  protected java.lang.Object newInstance(UnusedPrivateParameter unused) {
+    return new PurgeUserEventsResponse();
+  }
+
+  @java.lang.Override
+  public final com.google.protobuf.UnknownFieldSet getUnknownFields() {
+    return this.unknownFields;
+  }
+
+  private PurgeUserEventsResponse(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    this();
+    if (extensionRegistry == null) {
+      throw new java.lang.NullPointerException();
+    }
+    com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+        com.google.protobuf.UnknownFieldSet.newBuilder();
+    try {
+      boolean done = false;
+      while (!done) {
+        int tag = input.readTag();
+        switch (tag) {
+          case 0:
+            done = true;
+            break;
+          case 8:
+            {
+              purgedEventsCount_ = input.readInt64();
+              break;
+            }
+          default:
+            {
+              if (!parseUnknownField(input, unknownFields, extensionRegistry, tag)) {
+                done = true;
+              }
+              break;
+            }
+        }
+      }
+    } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+      throw e.setUnfinishedMessage(this);
+    } catch (java.io.IOException e) {
+      throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
+    } finally {
+      this.unknownFields = unknownFields.build();
+      makeExtensionsImmutable();
+    }
+  }
+
+  public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+    return com.google.cloud.retail.v2.PurgeConfigProto
+        .internal_static_google_cloud_retail_v2_PurgeUserEventsResponse_descriptor;
+  }
+
+  @java.lang.Override
+  protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internalGetFieldAccessorTable() {
+    return com.google.cloud.retail.v2.PurgeConfigProto
+        .internal_static_google_cloud_retail_v2_PurgeUserEventsResponse_fieldAccessorTable
+        .ensureFieldAccessorsInitialized(
+            com.google.cloud.retail.v2.PurgeUserEventsResponse.class,
+            com.google.cloud.retail.v2.PurgeUserEventsResponse.Builder.class);
+  }
+
+  public static final int PURGED_EVENTS_COUNT_FIELD_NUMBER = 1;
+  private long purgedEventsCount_;
+  /**
+   *
+   *
+   * <pre>
+   * The total count of events purged as a result of the operation.
+   * </pre>
+   *
+   * <code>int64 purged_events_count = 1;</code>
+   *
+   * @return The purgedEventsCount.
+   */
+  @java.lang.Override
+  public long getPurgedEventsCount() {
+    return purgedEventsCount_;
+  }
+
+  private byte memoizedIsInitialized = -1;
+
+  @java.lang.Override
+  public final boolean isInitialized() {
+    byte isInitialized = memoizedIsInitialized;
+    if (isInitialized == 1) return true;
+    if (isInitialized == 0) return false;
+
+    memoizedIsInitialized = 1;
+    return true;
+  }
+
+  @java.lang.Override
+  public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
+    if (purgedEventsCount_ != 0L) {
+      output.writeInt64(1, purgedEventsCount_);
+    }
+    unknownFields.writeTo(output);
+  }
+
+  @java.lang.Override
+  public int getSerializedSize() {
+    int size = memoizedSize;
+    if (size != -1) return size;
+
+    size = 0;
+    if (purgedEventsCount_ != 0L) {
+      size += com.google.protobuf.CodedOutputStream.computeInt64Size(1, purgedEventsCount_);
+    }
+    size += unknownFields.getSerializedSize();
+    memoizedSize = size;
+    return size;
+  }
+
+  @java.lang.Override
+  public boolean equals(final java.lang.Object obj) {
+    if (obj == this) {
+      return true;
+    }
+    if (!(obj instanceof com.google.cloud.retail.v2.PurgeUserEventsResponse)) {
+      return super.equals(obj);
+    }
+    com.google.cloud.retail.v2.PurgeUserEventsResponse other =
+        (com.google.cloud.retail.v2.PurgeUserEventsResponse) obj;
+
+    if (getPurgedEventsCount() != other.getPurgedEventsCount()) return false;
+    if (!unknownFields.equals(other.unknownFields)) return false;
+    return true;
+  }
+
+  @java.lang.Override
+  public int hashCode() {
+    if (memoizedHashCode != 0) {
+      return memoizedHashCode;
+    }
+    int hash = 41;
+    hash = (19 * hash) + getDescriptor().hashCode();
+    hash = (37 * hash) + PURGED_EVENTS_COUNT_FIELD_NUMBER;
+    hash = (53 * hash) + com.google.protobuf.Internal.hashLong(getPurgedEventsCount());
+    hash = (29 * hash) + unknownFields.hashCode();
+    memoizedHashCode = hash;
+    return hash;
+  }
+
+  public static com.google.cloud.retail.v2.PurgeUserEventsResponse parseFrom(
+      java.nio.ByteBuffer data) throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.PurgeUserEventsResponse parseFrom(
+      java.nio.ByteBuffer data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.PurgeUserEventsResponse parseFrom(
+      com.google.protobuf.ByteString data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.PurgeUserEventsResponse parseFrom(
+      com.google.protobuf.ByteString data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.PurgeUserEventsResponse parseFrom(byte[] data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.PurgeUserEventsResponse parseFrom(
+      byte[] data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.PurgeUserEventsResponse parseFrom(
+      java.io.InputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.PurgeUserEventsResponse parseFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.PurgeUserEventsResponse parseDelimitedFrom(
+      java.io.InputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.PurgeUserEventsResponse parseDelimitedFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.PurgeUserEventsResponse parseFrom(
+      com.google.protobuf.CodedInputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.PurgeUserEventsResponse parseFrom(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  @java.lang.Override
+  public Builder newBuilderForType() {
+    return newBuilder();
+  }
+
+  public static Builder newBuilder() {
+    return DEFAULT_INSTANCE.toBuilder();
+  }
+
+  public static Builder newBuilder(com.google.cloud.retail.v2.PurgeUserEventsResponse prototype) {
+    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+  }
+
+  @java.lang.Override
+  public Builder toBuilder() {
+    return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
+  }
+
+  @java.lang.Override
+  protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+    Builder builder = new Builder(parent);
+    return builder;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Response of the PurgeUserEventsRequest. If the long running operation is
+   * successfully done, then this message is returned by the
+   * google.longrunning.Operations.response field.
+   * </pre>
+   *
+   * Protobuf type {@code google.cloud.retail.v2.PurgeUserEventsResponse}
+   */
+  public static final class Builder extends com.google.protobuf.GeneratedMessageV3.Builder<Builder>
+      implements
+      // @@protoc_insertion_point(builder_implements:google.cloud.retail.v2.PurgeUserEventsResponse)
+      com.google.cloud.retail.v2.PurgeUserEventsResponseOrBuilder {
+    public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+      return com.google.cloud.retail.v2.PurgeConfigProto
+          .internal_static_google_cloud_retail_v2_PurgeUserEventsResponse_descriptor;
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return com.google.cloud.retail.v2.PurgeConfigProto
+          .internal_static_google_cloud_retail_v2_PurgeUserEventsResponse_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              com.google.cloud.retail.v2.PurgeUserEventsResponse.class,
+              com.google.cloud.retail.v2.PurgeUserEventsResponse.Builder.class);
+    }
+
+    // Construct using com.google.cloud.retail.v2.PurgeUserEventsResponse.newBuilder()
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
+
+    private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+      super(parent);
+      maybeForceBuilderInitialization();
+    }
+
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders) {}
+    }
+
+    @java.lang.Override
+    public Builder clear() {
+      super.clear();
+      purgedEventsCount_ = 0L;
+
+      return this;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
+      return com.google.cloud.retail.v2.PurgeConfigProto
+          .internal_static_google_cloud_retail_v2_PurgeUserEventsResponse_descriptor;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.PurgeUserEventsResponse getDefaultInstanceForType() {
+      return com.google.cloud.retail.v2.PurgeUserEventsResponse.getDefaultInstance();
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.PurgeUserEventsResponse build() {
+      com.google.cloud.retail.v2.PurgeUserEventsResponse result = buildPartial();
+      if (!result.isInitialized()) {
+        throw newUninitializedMessageException(result);
+      }
+      return result;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.PurgeUserEventsResponse buildPartial() {
+      com.google.cloud.retail.v2.PurgeUserEventsResponse result =
+          new com.google.cloud.retail.v2.PurgeUserEventsResponse(this);
+      result.purgedEventsCount_ = purgedEventsCount_;
+      onBuilt();
+      return result;
+    }
+
+    @java.lang.Override
+    public Builder clone() {
+      return super.clone();
+    }
+
+    @java.lang.Override
+    public Builder setField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.setField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
+      return super.clearField(field);
+    }
+
+    @java.lang.Override
+    public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+      return super.clearOneof(oneof);
+    }
+
+    @java.lang.Override
+    public Builder setRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, int index, java.lang.Object value) {
+      return super.setRepeatedField(field, index, value);
+    }
+
+    @java.lang.Override
+    public Builder addRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.addRepeatedField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(com.google.protobuf.Message other) {
+      if (other instanceof com.google.cloud.retail.v2.PurgeUserEventsResponse) {
+        return mergeFrom((com.google.cloud.retail.v2.PurgeUserEventsResponse) other);
+      } else {
+        super.mergeFrom(other);
+        return this;
+      }
+    }
+
+    public Builder mergeFrom(com.google.cloud.retail.v2.PurgeUserEventsResponse other) {
+      if (other == com.google.cloud.retail.v2.PurgeUserEventsResponse.getDefaultInstance())
+        return this;
+      if (other.getPurgedEventsCount() != 0L) {
+        setPurgedEventsCount(other.getPurgedEventsCount());
+      }
+      this.mergeUnknownFields(other.unknownFields);
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final boolean isInitialized() {
+      return true;
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      com.google.cloud.retail.v2.PurgeUserEventsResponse parsedMessage = null;
+      try {
+        parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        parsedMessage =
+            (com.google.cloud.retail.v2.PurgeUserEventsResponse) e.getUnfinishedMessage();
+        throw e.unwrapIOException();
+      } finally {
+        if (parsedMessage != null) {
+          mergeFrom(parsedMessage);
+        }
+      }
+      return this;
+    }
+
+    private long purgedEventsCount_;
+    /**
+     *
+     *
+     * <pre>
+     * The total count of events purged as a result of the operation.
+     * </pre>
+     *
+     * <code>int64 purged_events_count = 1;</code>
+     *
+     * @return The purgedEventsCount.
+     */
+    @java.lang.Override
+    public long getPurgedEventsCount() {
+      return purgedEventsCount_;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The total count of events purged as a result of the operation.
+     * </pre>
+     *
+     * <code>int64 purged_events_count = 1;</code>
+     *
+     * @param value The purgedEventsCount to set.
+     * @return This builder for chaining.
+     */
+    public Builder setPurgedEventsCount(long value) {
+
+      purgedEventsCount_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The total count of events purged as a result of the operation.
+     * </pre>
+     *
+     * <code>int64 purged_events_count = 1;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearPurgedEventsCount() {
+
+      purgedEventsCount_ = 0L;
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.setUnknownFields(unknownFields);
+    }
+
+    @java.lang.Override
+    public final Builder mergeUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.mergeUnknownFields(unknownFields);
+    }
+
+    // @@protoc_insertion_point(builder_scope:google.cloud.retail.v2.PurgeUserEventsResponse)
+  }
+
+  // @@protoc_insertion_point(class_scope:google.cloud.retail.v2.PurgeUserEventsResponse)
+  private static final com.google.cloud.retail.v2.PurgeUserEventsResponse DEFAULT_INSTANCE;
+
+  static {
+    DEFAULT_INSTANCE = new com.google.cloud.retail.v2.PurgeUserEventsResponse();
+  }
+
+  public static com.google.cloud.retail.v2.PurgeUserEventsResponse getDefaultInstance() {
+    return DEFAULT_INSTANCE;
+  }
+
+  private static final com.google.protobuf.Parser<PurgeUserEventsResponse> PARSER =
+      new com.google.protobuf.AbstractParser<PurgeUserEventsResponse>() {
+        @java.lang.Override
+        public PurgeUserEventsResponse parsePartialFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws com.google.protobuf.InvalidProtocolBufferException {
+          return new PurgeUserEventsResponse(input, extensionRegistry);
+        }
+      };
+
+  public static com.google.protobuf.Parser<PurgeUserEventsResponse> parser() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.protobuf.Parser<PurgeUserEventsResponse> getParserForType() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.cloud.retail.v2.PurgeUserEventsResponse getDefaultInstanceForType() {
+    return DEFAULT_INSTANCE;
+  }
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/PurgeUserEventsResponseOrBuilder.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/PurgeUserEventsResponseOrBuilder.java
new file mode 100644
index 00000000..7a72eaf9
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/PurgeUserEventsResponseOrBuilder.java
@@ -0,0 +1,38 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/purge_config.proto
+
+package com.google.cloud.retail.v2;
+
+public interface PurgeUserEventsResponseOrBuilder
+    extends
+    // @@protoc_insertion_point(interface_extends:google.cloud.retail.v2.PurgeUserEventsResponse)
+    com.google.protobuf.MessageOrBuilder {
+
+  /**
+   *
+   *
+   * <pre>
+   * The total count of events purged as a result of the operation.
+   * </pre>
+   *
+   * <code>int64 purged_events_count = 1;</code>
+   *
+   * @return The purgedEventsCount.
+   */
+  long getPurgedEventsCount();
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/RejoinUserEventsMetadata.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/RejoinUserEventsMetadata.java
new file mode 100644
index 00000000..a1e50aba
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/RejoinUserEventsMetadata.java
@@ -0,0 +1,456 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/user_event_service.proto
+
+package com.google.cloud.retail.v2;
+
+/**
+ *
+ *
+ * <pre>
+ * Metadata for RejoinUserEvents method.
+ * </pre>
+ *
+ * Protobuf type {@code google.cloud.retail.v2.RejoinUserEventsMetadata}
+ */
+public final class RejoinUserEventsMetadata extends com.google.protobuf.GeneratedMessageV3
+    implements
+    // @@protoc_insertion_point(message_implements:google.cloud.retail.v2.RejoinUserEventsMetadata)
+    RejoinUserEventsMetadataOrBuilder {
+  private static final long serialVersionUID = 0L;
+  // Use RejoinUserEventsMetadata.newBuilder() to construct.
+  private RejoinUserEventsMetadata(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+    super(builder);
+  }
+
+  private RejoinUserEventsMetadata() {}
+
+  @java.lang.Override
+  @SuppressWarnings({"unused"})
+  protected java.lang.Object newInstance(UnusedPrivateParameter unused) {
+    return new RejoinUserEventsMetadata();
+  }
+
+  @java.lang.Override
+  public final com.google.protobuf.UnknownFieldSet getUnknownFields() {
+    return this.unknownFields;
+  }
+
+  private RejoinUserEventsMetadata(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    this();
+    if (extensionRegistry == null) {
+      throw new java.lang.NullPointerException();
+    }
+    com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+        com.google.protobuf.UnknownFieldSet.newBuilder();
+    try {
+      boolean done = false;
+      while (!done) {
+        int tag = input.readTag();
+        switch (tag) {
+          case 0:
+            done = true;
+            break;
+          default:
+            {
+              if (!parseUnknownField(input, unknownFields, extensionRegistry, tag)) {
+                done = true;
+              }
+              break;
+            }
+        }
+      }
+    } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+      throw e.setUnfinishedMessage(this);
+    } catch (java.io.IOException e) {
+      throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
+    } finally {
+      this.unknownFields = unknownFields.build();
+      makeExtensionsImmutable();
+    }
+  }
+
+  public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+    return com.google.cloud.retail.v2.UserEventServiceProto
+        .internal_static_google_cloud_retail_v2_RejoinUserEventsMetadata_descriptor;
+  }
+
+  @java.lang.Override
+  protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internalGetFieldAccessorTable() {
+    return com.google.cloud.retail.v2.UserEventServiceProto
+        .internal_static_google_cloud_retail_v2_RejoinUserEventsMetadata_fieldAccessorTable
+        .ensureFieldAccessorsInitialized(
+            com.google.cloud.retail.v2.RejoinUserEventsMetadata.class,
+            com.google.cloud.retail.v2.RejoinUserEventsMetadata.Builder.class);
+  }
+
+  private byte memoizedIsInitialized = -1;
+
+  @java.lang.Override
+  public final boolean isInitialized() {
+    byte isInitialized = memoizedIsInitialized;
+    if (isInitialized == 1) return true;
+    if (isInitialized == 0) return false;
+
+    memoizedIsInitialized = 1;
+    return true;
+  }
+
+  @java.lang.Override
+  public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
+    unknownFields.writeTo(output);
+  }
+
+  @java.lang.Override
+  public int getSerializedSize() {
+    int size = memoizedSize;
+    if (size != -1) return size;
+
+    size = 0;
+    size += unknownFields.getSerializedSize();
+    memoizedSize = size;
+    return size;
+  }
+
+  @java.lang.Override
+  public boolean equals(final java.lang.Object obj) {
+    if (obj == this) {
+      return true;
+    }
+    if (!(obj instanceof com.google.cloud.retail.v2.RejoinUserEventsMetadata)) {
+      return super.equals(obj);
+    }
+    com.google.cloud.retail.v2.RejoinUserEventsMetadata other =
+        (com.google.cloud.retail.v2.RejoinUserEventsMetadata) obj;
+
+    if (!unknownFields.equals(other.unknownFields)) return false;
+    return true;
+  }
+
+  @java.lang.Override
+  public int hashCode() {
+    if (memoizedHashCode != 0) {
+      return memoizedHashCode;
+    }
+    int hash = 41;
+    hash = (19 * hash) + getDescriptor().hashCode();
+    hash = (29 * hash) + unknownFields.hashCode();
+    memoizedHashCode = hash;
+    return hash;
+  }
+
+  public static com.google.cloud.retail.v2.RejoinUserEventsMetadata parseFrom(
+      java.nio.ByteBuffer data) throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.RejoinUserEventsMetadata parseFrom(
+      java.nio.ByteBuffer data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.RejoinUserEventsMetadata parseFrom(
+      com.google.protobuf.ByteString data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.RejoinUserEventsMetadata parseFrom(
+      com.google.protobuf.ByteString data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.RejoinUserEventsMetadata parseFrom(byte[] data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.RejoinUserEventsMetadata parseFrom(
+      byte[] data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.RejoinUserEventsMetadata parseFrom(
+      java.io.InputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.RejoinUserEventsMetadata parseFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.RejoinUserEventsMetadata parseDelimitedFrom(
+      java.io.InputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.RejoinUserEventsMetadata parseDelimitedFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.RejoinUserEventsMetadata parseFrom(
+      com.google.protobuf.CodedInputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.RejoinUserEventsMetadata parseFrom(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  @java.lang.Override
+  public Builder newBuilderForType() {
+    return newBuilder();
+  }
+
+  public static Builder newBuilder() {
+    return DEFAULT_INSTANCE.toBuilder();
+  }
+
+  public static Builder newBuilder(com.google.cloud.retail.v2.RejoinUserEventsMetadata prototype) {
+    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+  }
+
+  @java.lang.Override
+  public Builder toBuilder() {
+    return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
+  }
+
+  @java.lang.Override
+  protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+    Builder builder = new Builder(parent);
+    return builder;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Metadata for RejoinUserEvents method.
+   * </pre>
+   *
+   * Protobuf type {@code google.cloud.retail.v2.RejoinUserEventsMetadata}
+   */
+  public static final class Builder extends com.google.protobuf.GeneratedMessageV3.Builder<Builder>
+      implements
+      // @@protoc_insertion_point(builder_implements:google.cloud.retail.v2.RejoinUserEventsMetadata)
+      com.google.cloud.retail.v2.RejoinUserEventsMetadataOrBuilder {
+    public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+      return com.google.cloud.retail.v2.UserEventServiceProto
+          .internal_static_google_cloud_retail_v2_RejoinUserEventsMetadata_descriptor;
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return com.google.cloud.retail.v2.UserEventServiceProto
+          .internal_static_google_cloud_retail_v2_RejoinUserEventsMetadata_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              com.google.cloud.retail.v2.RejoinUserEventsMetadata.class,
+              com.google.cloud.retail.v2.RejoinUserEventsMetadata.Builder.class);
+    }
+
+    // Construct using com.google.cloud.retail.v2.RejoinUserEventsMetadata.newBuilder()
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
+
+    private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+      super(parent);
+      maybeForceBuilderInitialization();
+    }
+
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders) {}
+    }
+
+    @java.lang.Override
+    public Builder clear() {
+      super.clear();
+      return this;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
+      return com.google.cloud.retail.v2.UserEventServiceProto
+          .internal_static_google_cloud_retail_v2_RejoinUserEventsMetadata_descriptor;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.RejoinUserEventsMetadata getDefaultInstanceForType() {
+      return com.google.cloud.retail.v2.RejoinUserEventsMetadata.getDefaultInstance();
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.RejoinUserEventsMetadata build() {
+      com.google.cloud.retail.v2.RejoinUserEventsMetadata result = buildPartial();
+      if (!result.isInitialized()) {
+        throw newUninitializedMessageException(result);
+      }
+      return result;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.RejoinUserEventsMetadata buildPartial() {
+      com.google.cloud.retail.v2.RejoinUserEventsMetadata result =
+          new com.google.cloud.retail.v2.RejoinUserEventsMetadata(this);
+      onBuilt();
+      return result;
+    }
+
+    @java.lang.Override
+    public Builder clone() {
+      return super.clone();
+    }
+
+    @java.lang.Override
+    public Builder setField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.setField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
+      return super.clearField(field);
+    }
+
+    @java.lang.Override
+    public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+      return super.clearOneof(oneof);
+    }
+
+    @java.lang.Override
+    public Builder setRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, int index, java.lang.Object value) {
+      return super.setRepeatedField(field, index, value);
+    }
+
+    @java.lang.Override
+    public Builder addRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.addRepeatedField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(com.google.protobuf.Message other) {
+      if (other instanceof com.google.cloud.retail.v2.RejoinUserEventsMetadata) {
+        return mergeFrom((com.google.cloud.retail.v2.RejoinUserEventsMetadata) other);
+      } else {
+        super.mergeFrom(other);
+        return this;
+      }
+    }
+
+    public Builder mergeFrom(com.google.cloud.retail.v2.RejoinUserEventsMetadata other) {
+      if (other == com.google.cloud.retail.v2.RejoinUserEventsMetadata.getDefaultInstance())
+        return this;
+      this.mergeUnknownFields(other.unknownFields);
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final boolean isInitialized() {
+      return true;
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      com.google.cloud.retail.v2.RejoinUserEventsMetadata parsedMessage = null;
+      try {
+        parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        parsedMessage =
+            (com.google.cloud.retail.v2.RejoinUserEventsMetadata) e.getUnfinishedMessage();
+        throw e.unwrapIOException();
+      } finally {
+        if (parsedMessage != null) {
+          mergeFrom(parsedMessage);
+        }
+      }
+      return this;
+    }
+
+    @java.lang.Override
+    public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.setUnknownFields(unknownFields);
+    }
+
+    @java.lang.Override
+    public final Builder mergeUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.mergeUnknownFields(unknownFields);
+    }
+
+    // @@protoc_insertion_point(builder_scope:google.cloud.retail.v2.RejoinUserEventsMetadata)
+  }
+
+  // @@protoc_insertion_point(class_scope:google.cloud.retail.v2.RejoinUserEventsMetadata)
+  private static final com.google.cloud.retail.v2.RejoinUserEventsMetadata DEFAULT_INSTANCE;
+
+  static {
+    DEFAULT_INSTANCE = new com.google.cloud.retail.v2.RejoinUserEventsMetadata();
+  }
+
+  public static com.google.cloud.retail.v2.RejoinUserEventsMetadata getDefaultInstance() {
+    return DEFAULT_INSTANCE;
+  }
+
+  private static final com.google.protobuf.Parser<RejoinUserEventsMetadata> PARSER =
+      new com.google.protobuf.AbstractParser<RejoinUserEventsMetadata>() {
+        @java.lang.Override
+        public RejoinUserEventsMetadata parsePartialFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws com.google.protobuf.InvalidProtocolBufferException {
+          return new RejoinUserEventsMetadata(input, extensionRegistry);
+        }
+      };
+
+  public static com.google.protobuf.Parser<RejoinUserEventsMetadata> parser() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.protobuf.Parser<RejoinUserEventsMetadata> getParserForType() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.cloud.retail.v2.RejoinUserEventsMetadata getDefaultInstanceForType() {
+    return DEFAULT_INSTANCE;
+  }
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/RejoinUserEventsMetadataOrBuilder.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/RejoinUserEventsMetadataOrBuilder.java
new file mode 100644
index 00000000..feb2c632
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/RejoinUserEventsMetadataOrBuilder.java
@@ -0,0 +1,24 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/user_event_service.proto
+
+package com.google.cloud.retail.v2;
+
+public interface RejoinUserEventsMetadataOrBuilder
+    extends
+    // @@protoc_insertion_point(interface_extends:google.cloud.retail.v2.RejoinUserEventsMetadata)
+    com.google.protobuf.MessageOrBuilder {}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/RejoinUserEventsRequest.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/RejoinUserEventsRequest.java
new file mode 100644
index 00000000..ebc79962
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/RejoinUserEventsRequest.java
@@ -0,0 +1,1013 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/user_event_service.proto
+
+package com.google.cloud.retail.v2;
+
+/**
+ *
+ *
+ * <pre>
+ * Request message for RejoinUserEvents method.
+ * </pre>
+ *
+ * Protobuf type {@code google.cloud.retail.v2.RejoinUserEventsRequest}
+ */
+public final class RejoinUserEventsRequest extends com.google.protobuf.GeneratedMessageV3
+    implements
+    // @@protoc_insertion_point(message_implements:google.cloud.retail.v2.RejoinUserEventsRequest)
+    RejoinUserEventsRequestOrBuilder {
+  private static final long serialVersionUID = 0L;
+  // Use RejoinUserEventsRequest.newBuilder() to construct.
+  private RejoinUserEventsRequest(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+    super(builder);
+  }
+
+  private RejoinUserEventsRequest() {
+    parent_ = "";
+    userEventRejoinScope_ = 0;
+  }
+
+  @java.lang.Override
+  @SuppressWarnings({"unused"})
+  protected java.lang.Object newInstance(UnusedPrivateParameter unused) {
+    return new RejoinUserEventsRequest();
+  }
+
+  @java.lang.Override
+  public final com.google.protobuf.UnknownFieldSet getUnknownFields() {
+    return this.unknownFields;
+  }
+
+  private RejoinUserEventsRequest(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    this();
+    if (extensionRegistry == null) {
+      throw new java.lang.NullPointerException();
+    }
+    com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+        com.google.protobuf.UnknownFieldSet.newBuilder();
+    try {
+      boolean done = false;
+      while (!done) {
+        int tag = input.readTag();
+        switch (tag) {
+          case 0:
+            done = true;
+            break;
+          case 10:
+            {
+              java.lang.String s = input.readStringRequireUtf8();
+
+              parent_ = s;
+              break;
+            }
+          case 16:
+            {
+              int rawValue = input.readEnum();
+
+              userEventRejoinScope_ = rawValue;
+              break;
+            }
+          default:
+            {
+              if (!parseUnknownField(input, unknownFields, extensionRegistry, tag)) {
+                done = true;
+              }
+              break;
+            }
+        }
+      }
+    } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+      throw e.setUnfinishedMessage(this);
+    } catch (java.io.IOException e) {
+      throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
+    } finally {
+      this.unknownFields = unknownFields.build();
+      makeExtensionsImmutable();
+    }
+  }
+
+  public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+    return com.google.cloud.retail.v2.UserEventServiceProto
+        .internal_static_google_cloud_retail_v2_RejoinUserEventsRequest_descriptor;
+  }
+
+  @java.lang.Override
+  protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internalGetFieldAccessorTable() {
+    return com.google.cloud.retail.v2.UserEventServiceProto
+        .internal_static_google_cloud_retail_v2_RejoinUserEventsRequest_fieldAccessorTable
+        .ensureFieldAccessorsInitialized(
+            com.google.cloud.retail.v2.RejoinUserEventsRequest.class,
+            com.google.cloud.retail.v2.RejoinUserEventsRequest.Builder.class);
+  }
+
+  /**
+   *
+   *
+   * <pre>
+   * The scope of user events to be rejoined with the latest product catalog.
+   * If the rejoining aims at reducing number of unjoined events, set
+   * UserEventRejoinScope to UNJOINED_EVENTS.
+   * If the rejoining aims at correcting product catalog information in joined
+   * events, set UserEventRejoinScope to JOINED_EVENTS.
+   * If all events needs to be rejoined, set UserEventRejoinScope to
+   * USER_EVENT_REJOIN_SCOPE_UNSPECIFIED.
+   * </pre>
+   *
+   * Protobuf enum {@code google.cloud.retail.v2.RejoinUserEventsRequest.UserEventRejoinScope}
+   */
+  public enum UserEventRejoinScope implements com.google.protobuf.ProtocolMessageEnum {
+    /**
+     *
+     *
+     * <pre>
+     * Rejoin all events with the latest product catalog, including both joined
+     * events and unjoined events.
+     * </pre>
+     *
+     * <code>USER_EVENT_REJOIN_SCOPE_UNSPECIFIED = 0;</code>
+     */
+    USER_EVENT_REJOIN_SCOPE_UNSPECIFIED(0),
+    /**
+     *
+     *
+     * <pre>
+     * Only rejoin joined events with the latest product catalog.
+     * </pre>
+     *
+     * <code>JOINED_EVENTS = 1;</code>
+     */
+    JOINED_EVENTS(1),
+    /**
+     *
+     *
+     * <pre>
+     * Only rejoin unjoined events with the latest product catalog.
+     * </pre>
+     *
+     * <code>UNJOINED_EVENTS = 2;</code>
+     */
+    UNJOINED_EVENTS(2),
+    UNRECOGNIZED(-1),
+    ;
+
+    /**
+     *
+     *
+     * <pre>
+     * Rejoin all events with the latest product catalog, including both joined
+     * events and unjoined events.
+     * </pre>
+     *
+     * <code>USER_EVENT_REJOIN_SCOPE_UNSPECIFIED = 0;</code>
+     */
+    public static final int USER_EVENT_REJOIN_SCOPE_UNSPECIFIED_VALUE = 0;
+    /**
+     *
+     *
+     * <pre>
+     * Only rejoin joined events with the latest product catalog.
+     * </pre>
+     *
+     * <code>JOINED_EVENTS = 1;</code>
+     */
+    public static final int JOINED_EVENTS_VALUE = 1;
+    /**
+     *
+     *
+     * <pre>
+     * Only rejoin unjoined events with the latest product catalog.
+     * </pre>
+     *
+     * <code>UNJOINED_EVENTS = 2;</code>
+     */
+    public static final int UNJOINED_EVENTS_VALUE = 2;
+
+    public final int getNumber() {
+      if (this == UNRECOGNIZED) {
+        throw new java.lang.IllegalArgumentException(
+            "Can't get the number of an unknown enum value.");
+      }
+      return value;
+    }
+
+    /**
+     * @param value The numeric wire value of the corresponding enum entry.
+     * @return The enum associated with the given numeric wire value.
+     * @deprecated Use {@link #forNumber(int)} instead.
+     */
+    @java.lang.Deprecated
+    public static UserEventRejoinScope valueOf(int value) {
+      return forNumber(value);
+    }
+
+    /**
+     * @param value The numeric wire value of the corresponding enum entry.
+     * @return The enum associated with the given numeric wire value.
+     */
+    public static UserEventRejoinScope forNumber(int value) {
+      switch (value) {
+        case 0:
+          return USER_EVENT_REJOIN_SCOPE_UNSPECIFIED;
+        case 1:
+          return JOINED_EVENTS;
+        case 2:
+          return UNJOINED_EVENTS;
+        default:
+          return null;
+      }
+    }
+
+    public static com.google.protobuf.Internal.EnumLiteMap<UserEventRejoinScope>
+        internalGetValueMap() {
+      return internalValueMap;
+    }
+
+    private static final com.google.protobuf.Internal.EnumLiteMap<UserEventRejoinScope>
+        internalValueMap =
+            new com.google.protobuf.Internal.EnumLiteMap<UserEventRejoinScope>() {
+              public UserEventRejoinScope findValueByNumber(int number) {
+                return UserEventRejoinScope.forNumber(number);
+              }
+            };
+
+    public final com.google.protobuf.Descriptors.EnumValueDescriptor getValueDescriptor() {
+      if (this == UNRECOGNIZED) {
+        throw new java.lang.IllegalStateException(
+            "Can't get the descriptor of an unrecognized enum value.");
+      }
+      return getDescriptor().getValues().get(ordinal());
+    }
+
+    public final com.google.protobuf.Descriptors.EnumDescriptor getDescriptorForType() {
+      return getDescriptor();
+    }
+
+    public static final com.google.protobuf.Descriptors.EnumDescriptor getDescriptor() {
+      return com.google.cloud.retail.v2.RejoinUserEventsRequest.getDescriptor()
+          .getEnumTypes()
+          .get(0);
+    }
+
+    private static final UserEventRejoinScope[] VALUES = values();
+
+    public static UserEventRejoinScope valueOf(
+        com.google.protobuf.Descriptors.EnumValueDescriptor desc) {
+      if (desc.getType() != getDescriptor()) {
+        throw new java.lang.IllegalArgumentException("EnumValueDescriptor is not for this type.");
+      }
+      if (desc.getIndex() == -1) {
+        return UNRECOGNIZED;
+      }
+      return VALUES[desc.getIndex()];
+    }
+
+    private final int value;
+
+    private UserEventRejoinScope(int value) {
+      this.value = value;
+    }
+
+    // @@protoc_insertion_point(enum_scope:google.cloud.retail.v2.RejoinUserEventsRequest.UserEventRejoinScope)
+  }
+
+  public static final int PARENT_FIELD_NUMBER = 1;
+  private volatile java.lang.Object parent_;
+  /**
+   *
+   *
+   * <pre>
+   * Required. The parent catalog resource name, such as
+   * "projects/1234/locations/global/catalogs/default_catalog".
+   * </pre>
+   *
+   * <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The parent.
+   */
+  @java.lang.Override
+  public java.lang.String getParent() {
+    java.lang.Object ref = parent_;
+    if (ref instanceof java.lang.String) {
+      return (java.lang.String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+      java.lang.String s = bs.toStringUtf8();
+      parent_ = s;
+      return s;
+    }
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Required. The parent catalog resource name, such as
+   * "projects/1234/locations/global/catalogs/default_catalog".
+   * </pre>
+   *
+   * <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The bytes for parent.
+   */
+  @java.lang.Override
+  public com.google.protobuf.ByteString getParentBytes() {
+    java.lang.Object ref = parent_;
+    if (ref instanceof java.lang.String) {
+      com.google.protobuf.ByteString b =
+          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+      parent_ = b;
+      return b;
+    } else {
+      return (com.google.protobuf.ByteString) ref;
+    }
+  }
+
+  public static final int USER_EVENT_REJOIN_SCOPE_FIELD_NUMBER = 2;
+  private int userEventRejoinScope_;
+  /**
+   *
+   *
+   * <pre>
+   * The type of the user event rejoin to define the scope and range of the user
+   * events to be rejoined with the latest product catalog. Defaults to
+   * USER_EVENT_REJOIN_SCOPE_UNSPECIFIED if this field is not set, or set to an
+   * invalid integer value.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.retail.v2.RejoinUserEventsRequest.UserEventRejoinScope user_event_rejoin_scope = 2;
+   * </code>
+   *
+   * @return The enum numeric value on the wire for userEventRejoinScope.
+   */
+  @java.lang.Override
+  public int getUserEventRejoinScopeValue() {
+    return userEventRejoinScope_;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * The type of the user event rejoin to define the scope and range of the user
+   * events to be rejoined with the latest product catalog. Defaults to
+   * USER_EVENT_REJOIN_SCOPE_UNSPECIFIED if this field is not set, or set to an
+   * invalid integer value.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.retail.v2.RejoinUserEventsRequest.UserEventRejoinScope user_event_rejoin_scope = 2;
+   * </code>
+   *
+   * @return The userEventRejoinScope.
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.RejoinUserEventsRequest.UserEventRejoinScope
+      getUserEventRejoinScope() {
+    @SuppressWarnings("deprecation")
+    com.google.cloud.retail.v2.RejoinUserEventsRequest.UserEventRejoinScope result =
+        com.google.cloud.retail.v2.RejoinUserEventsRequest.UserEventRejoinScope.valueOf(
+            userEventRejoinScope_);
+    return result == null
+        ? com.google.cloud.retail.v2.RejoinUserEventsRequest.UserEventRejoinScope.UNRECOGNIZED
+        : result;
+  }
+
+  private byte memoizedIsInitialized = -1;
+
+  @java.lang.Override
+  public final boolean isInitialized() {
+    byte isInitialized = memoizedIsInitialized;
+    if (isInitialized == 1) return true;
+    if (isInitialized == 0) return false;
+
+    memoizedIsInitialized = 1;
+    return true;
+  }
+
+  @java.lang.Override
+  public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
+    if (!getParentBytes().isEmpty()) {
+      com.google.protobuf.GeneratedMessageV3.writeString(output, 1, parent_);
+    }
+    if (userEventRejoinScope_
+        != com.google.cloud.retail.v2.RejoinUserEventsRequest.UserEventRejoinScope
+            .USER_EVENT_REJOIN_SCOPE_UNSPECIFIED
+            .getNumber()) {
+      output.writeEnum(2, userEventRejoinScope_);
+    }
+    unknownFields.writeTo(output);
+  }
+
+  @java.lang.Override
+  public int getSerializedSize() {
+    int size = memoizedSize;
+    if (size != -1) return size;
+
+    size = 0;
+    if (!getParentBytes().isEmpty()) {
+      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(1, parent_);
+    }
+    if (userEventRejoinScope_
+        != com.google.cloud.retail.v2.RejoinUserEventsRequest.UserEventRejoinScope
+            .USER_EVENT_REJOIN_SCOPE_UNSPECIFIED
+            .getNumber()) {
+      size += com.google.protobuf.CodedOutputStream.computeEnumSize(2, userEventRejoinScope_);
+    }
+    size += unknownFields.getSerializedSize();
+    memoizedSize = size;
+    return size;
+  }
+
+  @java.lang.Override
+  public boolean equals(final java.lang.Object obj) {
+    if (obj == this) {
+      return true;
+    }
+    if (!(obj instanceof com.google.cloud.retail.v2.RejoinUserEventsRequest)) {
+      return super.equals(obj);
+    }
+    com.google.cloud.retail.v2.RejoinUserEventsRequest other =
+        (com.google.cloud.retail.v2.RejoinUserEventsRequest) obj;
+
+    if (!getParent().equals(other.getParent())) return false;
+    if (userEventRejoinScope_ != other.userEventRejoinScope_) return false;
+    if (!unknownFields.equals(other.unknownFields)) return false;
+    return true;
+  }
+
+  @java.lang.Override
+  public int hashCode() {
+    if (memoizedHashCode != 0) {
+      return memoizedHashCode;
+    }
+    int hash = 41;
+    hash = (19 * hash) + getDescriptor().hashCode();
+    hash = (37 * hash) + PARENT_FIELD_NUMBER;
+    hash = (53 * hash) + getParent().hashCode();
+    hash = (37 * hash) + USER_EVENT_REJOIN_SCOPE_FIELD_NUMBER;
+    hash = (53 * hash) + userEventRejoinScope_;
+    hash = (29 * hash) + unknownFields.hashCode();
+    memoizedHashCode = hash;
+    return hash;
+  }
+
+  public static com.google.cloud.retail.v2.RejoinUserEventsRequest parseFrom(
+      java.nio.ByteBuffer data) throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.RejoinUserEventsRequest parseFrom(
+      java.nio.ByteBuffer data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.RejoinUserEventsRequest parseFrom(
+      com.google.protobuf.ByteString data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.RejoinUserEventsRequest parseFrom(
+      com.google.protobuf.ByteString data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.RejoinUserEventsRequest parseFrom(byte[] data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.RejoinUserEventsRequest parseFrom(
+      byte[] data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.RejoinUserEventsRequest parseFrom(
+      java.io.InputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.RejoinUserEventsRequest parseFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.RejoinUserEventsRequest parseDelimitedFrom(
+      java.io.InputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.RejoinUserEventsRequest parseDelimitedFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.RejoinUserEventsRequest parseFrom(
+      com.google.protobuf.CodedInputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.RejoinUserEventsRequest parseFrom(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  @java.lang.Override
+  public Builder newBuilderForType() {
+    return newBuilder();
+  }
+
+  public static Builder newBuilder() {
+    return DEFAULT_INSTANCE.toBuilder();
+  }
+
+  public static Builder newBuilder(com.google.cloud.retail.v2.RejoinUserEventsRequest prototype) {
+    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+  }
+
+  @java.lang.Override
+  public Builder toBuilder() {
+    return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
+  }
+
+  @java.lang.Override
+  protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+    Builder builder = new Builder(parent);
+    return builder;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Request message for RejoinUserEvents method.
+   * </pre>
+   *
+   * Protobuf type {@code google.cloud.retail.v2.RejoinUserEventsRequest}
+   */
+  public static final class Builder extends com.google.protobuf.GeneratedMessageV3.Builder<Builder>
+      implements
+      // @@protoc_insertion_point(builder_implements:google.cloud.retail.v2.RejoinUserEventsRequest)
+      com.google.cloud.retail.v2.RejoinUserEventsRequestOrBuilder {
+    public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+      return com.google.cloud.retail.v2.UserEventServiceProto
+          .internal_static_google_cloud_retail_v2_RejoinUserEventsRequest_descriptor;
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return com.google.cloud.retail.v2.UserEventServiceProto
+          .internal_static_google_cloud_retail_v2_RejoinUserEventsRequest_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              com.google.cloud.retail.v2.RejoinUserEventsRequest.class,
+              com.google.cloud.retail.v2.RejoinUserEventsRequest.Builder.class);
+    }
+
+    // Construct using com.google.cloud.retail.v2.RejoinUserEventsRequest.newBuilder()
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
+
+    private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+      super(parent);
+      maybeForceBuilderInitialization();
+    }
+
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders) {}
+    }
+
+    @java.lang.Override
+    public Builder clear() {
+      super.clear();
+      parent_ = "";
+
+      userEventRejoinScope_ = 0;
+
+      return this;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
+      return com.google.cloud.retail.v2.UserEventServiceProto
+          .internal_static_google_cloud_retail_v2_RejoinUserEventsRequest_descriptor;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.RejoinUserEventsRequest getDefaultInstanceForType() {
+      return com.google.cloud.retail.v2.RejoinUserEventsRequest.getDefaultInstance();
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.RejoinUserEventsRequest build() {
+      com.google.cloud.retail.v2.RejoinUserEventsRequest result = buildPartial();
+      if (!result.isInitialized()) {
+        throw newUninitializedMessageException(result);
+      }
+      return result;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.RejoinUserEventsRequest buildPartial() {
+      com.google.cloud.retail.v2.RejoinUserEventsRequest result =
+          new com.google.cloud.retail.v2.RejoinUserEventsRequest(this);
+      result.parent_ = parent_;
+      result.userEventRejoinScope_ = userEventRejoinScope_;
+      onBuilt();
+      return result;
+    }
+
+    @java.lang.Override
+    public Builder clone() {
+      return super.clone();
+    }
+
+    @java.lang.Override
+    public Builder setField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.setField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
+      return super.clearField(field);
+    }
+
+    @java.lang.Override
+    public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+      return super.clearOneof(oneof);
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+    @java.lang.Override
+    public Builder setRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, int index, java.lang.Object value) {
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+
+    @java.lang.Override
+    public Builder addRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.addRepeatedField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(com.google.protobuf.Message other) {
+      if (other instanceof com.google.cloud.retail.v2.RejoinUserEventsRequest) {
+        return mergeFrom((com.google.cloud.retail.v2.RejoinUserEventsRequest) other);
+      } else {
+        super.mergeFrom(other);
+        return this;
+      }
+    }
+
+    public Builder mergeFrom(com.google.cloud.retail.v2.RejoinUserEventsRequest other) {
+      if (other == com.google.cloud.retail.v2.RejoinUserEventsRequest.getDefaultInstance())
+        return this;
+      if (!other.getParent().isEmpty()) {
+        parent_ = other.parent_;
+        onChanged();
+      }
+      if (other.userEventRejoinScope_ != 0) {
+        setUserEventRejoinScopeValue(other.getUserEventRejoinScopeValue());
+      }
+      this.mergeUnknownFields(other.unknownFields);
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final boolean isInitialized() {
+      return true;
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      com.google.cloud.retail.v2.RejoinUserEventsRequest parsedMessage = null;
+      try {
+        parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        parsedMessage =
+            (com.google.cloud.retail.v2.RejoinUserEventsRequest) e.getUnfinishedMessage();
+        throw e.unwrapIOException();
+      } finally {
+        if (parsedMessage != null) {
+          mergeFrom(parsedMessage);
+        }
+      }
+      return this;
+    }
+
+    private java.lang.Object parent_ = "";
+    /**
+     *
+     *
+     * <pre>
+     * Required. The parent catalog resource name, such as
+     * "projects/1234/locations/global/catalogs/default_catalog".
+     * </pre>
+     *
+     * <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @return The parent.
+     */
+    public java.lang.String getParent() {
+      java.lang.Object ref = parent_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        parent_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The parent catalog resource name, such as
+     * "projects/1234/locations/global/catalogs/default_catalog".
+     * </pre>
+     *
+     * <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @return The bytes for parent.
+     */
+    public com.google.protobuf.ByteString getParentBytes() {
+      java.lang.Object ref = parent_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b =
+            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+        parent_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The parent catalog resource name, such as
+     * "projects/1234/locations/global/catalogs/default_catalog".
+     * </pre>
+     *
+     * <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @param value The parent to set.
+     * @return This builder for chaining.
+     */
+    public Builder setParent(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+
+      parent_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The parent catalog resource name, such as
+     * "projects/1234/locations/global/catalogs/default_catalog".
+     * </pre>
+     *
+     * <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearParent() {
+
+      parent_ = getDefaultInstance().getParent();
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The parent catalog resource name, such as
+     * "projects/1234/locations/global/catalogs/default_catalog".
+     * </pre>
+     *
+     * <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @param value The bytes for parent to set.
+     * @return This builder for chaining.
+     */
+    public Builder setParentBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+
+      parent_ = value;
+      onChanged();
+      return this;
+    }
+
+    private int userEventRejoinScope_ = 0;
+    /**
+     *
+     *
+     * <pre>
+     * The type of the user event rejoin to define the scope and range of the user
+     * events to be rejoined with the latest product catalog. Defaults to
+     * USER_EVENT_REJOIN_SCOPE_UNSPECIFIED if this field is not set, or set to an
+     * invalid integer value.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.RejoinUserEventsRequest.UserEventRejoinScope user_event_rejoin_scope = 2;
+     * </code>
+     *
+     * @return The enum numeric value on the wire for userEventRejoinScope.
+     */
+    @java.lang.Override
+    public int getUserEventRejoinScopeValue() {
+      return userEventRejoinScope_;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The type of the user event rejoin to define the scope and range of the user
+     * events to be rejoined with the latest product catalog. Defaults to
+     * USER_EVENT_REJOIN_SCOPE_UNSPECIFIED if this field is not set, or set to an
+     * invalid integer value.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.RejoinUserEventsRequest.UserEventRejoinScope user_event_rejoin_scope = 2;
+     * </code>
+     *
+     * @param value The enum numeric value on the wire for userEventRejoinScope to set.
+     * @return This builder for chaining.
+     */
+    public Builder setUserEventRejoinScopeValue(int value) {
+
+      userEventRejoinScope_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The type of the user event rejoin to define the scope and range of the user
+     * events to be rejoined with the latest product catalog. Defaults to
+     * USER_EVENT_REJOIN_SCOPE_UNSPECIFIED if this field is not set, or set to an
+     * invalid integer value.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.RejoinUserEventsRequest.UserEventRejoinScope user_event_rejoin_scope = 2;
+     * </code>
+     *
+     * @return The userEventRejoinScope.
+     */
+    @java.lang.Override
+    public com.google.cloud.retail.v2.RejoinUserEventsRequest.UserEventRejoinScope
+        getUserEventRejoinScope() {
+      @SuppressWarnings("deprecation")
+      com.google.cloud.retail.v2.RejoinUserEventsRequest.UserEventRejoinScope result =
+          com.google.cloud.retail.v2.RejoinUserEventsRequest.UserEventRejoinScope.valueOf(
+              userEventRejoinScope_);
+      return result == null
+          ? com.google.cloud.retail.v2.RejoinUserEventsRequest.UserEventRejoinScope.UNRECOGNIZED
+          : result;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The type of the user event rejoin to define the scope and range of the user
+     * events to be rejoined with the latest product catalog. Defaults to
+     * USER_EVENT_REJOIN_SCOPE_UNSPECIFIED if this field is not set, or set to an
+     * invalid integer value.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.RejoinUserEventsRequest.UserEventRejoinScope user_event_rejoin_scope = 2;
+     * </code>
+     *
+     * @param value The userEventRejoinScope to set.
+     * @return This builder for chaining.
+     */
+    public Builder setUserEventRejoinScope(
+        com.google.cloud.retail.v2.RejoinUserEventsRequest.UserEventRejoinScope value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+
+      userEventRejoinScope_ = value.getNumber();
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The type of the user event rejoin to define the scope and range of the user
+     * events to be rejoined with the latest product catalog. Defaults to
+     * USER_EVENT_REJOIN_SCOPE_UNSPECIFIED if this field is not set, or set to an
+     * invalid integer value.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.RejoinUserEventsRequest.UserEventRejoinScope user_event_rejoin_scope = 2;
+     * </code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearUserEventRejoinScope() {
+
+      userEventRejoinScope_ = 0;
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.setUnknownFields(unknownFields);
+    }
+
+    @java.lang.Override
+    public final Builder mergeUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.mergeUnknownFields(unknownFields);
+    }
+
+    // @@protoc_insertion_point(builder_scope:google.cloud.retail.v2.RejoinUserEventsRequest)
+  }
+
+  // @@protoc_insertion_point(class_scope:google.cloud.retail.v2.RejoinUserEventsRequest)
+  private static final com.google.cloud.retail.v2.RejoinUserEventsRequest DEFAULT_INSTANCE;
+
+  static {
+    DEFAULT_INSTANCE = new com.google.cloud.retail.v2.RejoinUserEventsRequest();
+  }
+
+  public static com.google.cloud.retail.v2.RejoinUserEventsRequest getDefaultInstance() {
+    return DEFAULT_INSTANCE;
+  }
+
+  private static final com.google.protobuf.Parser<RejoinUserEventsRequest> PARSER =
+      new com.google.protobuf.AbstractParser<RejoinUserEventsRequest>() {
+        @java.lang.Override
+        public RejoinUserEventsRequest parsePartialFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws com.google.protobuf.InvalidProtocolBufferException {
+          return new RejoinUserEventsRequest(input, extensionRegistry);
+        }
+      };
+
+  public static com.google.protobuf.Parser<RejoinUserEventsRequest> parser() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.protobuf.Parser<RejoinUserEventsRequest> getParserForType() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.cloud.retail.v2.RejoinUserEventsRequest getDefaultInstanceForType() {
+    return DEFAULT_INSTANCE;
+  }
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/RejoinUserEventsRequestOrBuilder.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/RejoinUserEventsRequestOrBuilder.java
new file mode 100644
index 00000000..8d829165
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/RejoinUserEventsRequestOrBuilder.java
@@ -0,0 +1,87 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/user_event_service.proto
+
+package com.google.cloud.retail.v2;
+
+public interface RejoinUserEventsRequestOrBuilder
+    extends
+    // @@protoc_insertion_point(interface_extends:google.cloud.retail.v2.RejoinUserEventsRequest)
+    com.google.protobuf.MessageOrBuilder {
+
+  /**
+   *
+   *
+   * <pre>
+   * Required. The parent catalog resource name, such as
+   * "projects/1234/locations/global/catalogs/default_catalog".
+   * </pre>
+   *
+   * <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The parent.
+   */
+  java.lang.String getParent();
+  /**
+   *
+   *
+   * <pre>
+   * Required. The parent catalog resource name, such as
+   * "projects/1234/locations/global/catalogs/default_catalog".
+   * </pre>
+   *
+   * <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The bytes for parent.
+   */
+  com.google.protobuf.ByteString getParentBytes();
+
+  /**
+   *
+   *
+   * <pre>
+   * The type of the user event rejoin to define the scope and range of the user
+   * events to be rejoined with the latest product catalog. Defaults to
+   * USER_EVENT_REJOIN_SCOPE_UNSPECIFIED if this field is not set, or set to an
+   * invalid integer value.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.retail.v2.RejoinUserEventsRequest.UserEventRejoinScope user_event_rejoin_scope = 2;
+   * </code>
+   *
+   * @return The enum numeric value on the wire for userEventRejoinScope.
+   */
+  int getUserEventRejoinScopeValue();
+  /**
+   *
+   *
+   * <pre>
+   * The type of the user event rejoin to define the scope and range of the user
+   * events to be rejoined with the latest product catalog. Defaults to
+   * USER_EVENT_REJOIN_SCOPE_UNSPECIFIED if this field is not set, or set to an
+   * invalid integer value.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.retail.v2.RejoinUserEventsRequest.UserEventRejoinScope user_event_rejoin_scope = 2;
+   * </code>
+   *
+   * @return The userEventRejoinScope.
+   */
+  com.google.cloud.retail.v2.RejoinUserEventsRequest.UserEventRejoinScope getUserEventRejoinScope();
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/RejoinUserEventsResponse.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/RejoinUserEventsResponse.java
new file mode 100644
index 00000000..ce4c0f16
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/RejoinUserEventsResponse.java
@@ -0,0 +1,546 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/user_event_service.proto
+
+package com.google.cloud.retail.v2;
+
+/**
+ *
+ *
+ * <pre>
+ * Response message for RejoinUserEvents method.
+ * </pre>
+ *
+ * Protobuf type {@code google.cloud.retail.v2.RejoinUserEventsResponse}
+ */
+public final class RejoinUserEventsResponse extends com.google.protobuf.GeneratedMessageV3
+    implements
+    // @@protoc_insertion_point(message_implements:google.cloud.retail.v2.RejoinUserEventsResponse)
+    RejoinUserEventsResponseOrBuilder {
+  private static final long serialVersionUID = 0L;
+  // Use RejoinUserEventsResponse.newBuilder() to construct.
+  private RejoinUserEventsResponse(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+    super(builder);
+  }
+
+  private RejoinUserEventsResponse() {}
+
+  @java.lang.Override
+  @SuppressWarnings({"unused"})
+  protected java.lang.Object newInstance(UnusedPrivateParameter unused) {
+    return new RejoinUserEventsResponse();
+  }
+
+  @java.lang.Override
+  public final com.google.protobuf.UnknownFieldSet getUnknownFields() {
+    return this.unknownFields;
+  }
+
+  private RejoinUserEventsResponse(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    this();
+    if (extensionRegistry == null) {
+      throw new java.lang.NullPointerException();
+    }
+    com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+        com.google.protobuf.UnknownFieldSet.newBuilder();
+    try {
+      boolean done = false;
+      while (!done) {
+        int tag = input.readTag();
+        switch (tag) {
+          case 0:
+            done = true;
+            break;
+          case 8:
+            {
+              rejoinedUserEventsCount_ = input.readInt64();
+              break;
+            }
+          default:
+            {
+              if (!parseUnknownField(input, unknownFields, extensionRegistry, tag)) {
+                done = true;
+              }
+              break;
+            }
+        }
+      }
+    } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+      throw e.setUnfinishedMessage(this);
+    } catch (java.io.IOException e) {
+      throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
+    } finally {
+      this.unknownFields = unknownFields.build();
+      makeExtensionsImmutable();
+    }
+  }
+
+  public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+    return com.google.cloud.retail.v2.UserEventServiceProto
+        .internal_static_google_cloud_retail_v2_RejoinUserEventsResponse_descriptor;
+  }
+
+  @java.lang.Override
+  protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internalGetFieldAccessorTable() {
+    return com.google.cloud.retail.v2.UserEventServiceProto
+        .internal_static_google_cloud_retail_v2_RejoinUserEventsResponse_fieldAccessorTable
+        .ensureFieldAccessorsInitialized(
+            com.google.cloud.retail.v2.RejoinUserEventsResponse.class,
+            com.google.cloud.retail.v2.RejoinUserEventsResponse.Builder.class);
+  }
+
+  public static final int REJOINED_USER_EVENTS_COUNT_FIELD_NUMBER = 1;
+  private long rejoinedUserEventsCount_;
+  /**
+   *
+   *
+   * <pre>
+   * Number of user events that were joined with latest product catalog.
+   * </pre>
+   *
+   * <code>int64 rejoined_user_events_count = 1;</code>
+   *
+   * @return The rejoinedUserEventsCount.
+   */
+  @java.lang.Override
+  public long getRejoinedUserEventsCount() {
+    return rejoinedUserEventsCount_;
+  }
+
+  private byte memoizedIsInitialized = -1;
+
+  @java.lang.Override
+  public final boolean isInitialized() {
+    byte isInitialized = memoizedIsInitialized;
+    if (isInitialized == 1) return true;
+    if (isInitialized == 0) return false;
+
+    memoizedIsInitialized = 1;
+    return true;
+  }
+
+  @java.lang.Override
+  public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
+    if (rejoinedUserEventsCount_ != 0L) {
+      output.writeInt64(1, rejoinedUserEventsCount_);
+    }
+    unknownFields.writeTo(output);
+  }
+
+  @java.lang.Override
+  public int getSerializedSize() {
+    int size = memoizedSize;
+    if (size != -1) return size;
+
+    size = 0;
+    if (rejoinedUserEventsCount_ != 0L) {
+      size += com.google.protobuf.CodedOutputStream.computeInt64Size(1, rejoinedUserEventsCount_);
+    }
+    size += unknownFields.getSerializedSize();
+    memoizedSize = size;
+    return size;
+  }
+
+  @java.lang.Override
+  public boolean equals(final java.lang.Object obj) {
+    if (obj == this) {
+      return true;
+    }
+    if (!(obj instanceof com.google.cloud.retail.v2.RejoinUserEventsResponse)) {
+      return super.equals(obj);
+    }
+    com.google.cloud.retail.v2.RejoinUserEventsResponse other =
+        (com.google.cloud.retail.v2.RejoinUserEventsResponse) obj;
+
+    if (getRejoinedUserEventsCount() != other.getRejoinedUserEventsCount()) return false;
+    if (!unknownFields.equals(other.unknownFields)) return false;
+    return true;
+  }
+
+  @java.lang.Override
+  public int hashCode() {
+    if (memoizedHashCode != 0) {
+      return memoizedHashCode;
+    }
+    int hash = 41;
+    hash = (19 * hash) + getDescriptor().hashCode();
+    hash = (37 * hash) + REJOINED_USER_EVENTS_COUNT_FIELD_NUMBER;
+    hash = (53 * hash) + com.google.protobuf.Internal.hashLong(getRejoinedUserEventsCount());
+    hash = (29 * hash) + unknownFields.hashCode();
+    memoizedHashCode = hash;
+    return hash;
+  }
+
+  public static com.google.cloud.retail.v2.RejoinUserEventsResponse parseFrom(
+      java.nio.ByteBuffer data) throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.RejoinUserEventsResponse parseFrom(
+      java.nio.ByteBuffer data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.RejoinUserEventsResponse parseFrom(
+      com.google.protobuf.ByteString data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.RejoinUserEventsResponse parseFrom(
+      com.google.protobuf.ByteString data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.RejoinUserEventsResponse parseFrom(byte[] data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.RejoinUserEventsResponse parseFrom(
+      byte[] data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.RejoinUserEventsResponse parseFrom(
+      java.io.InputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.RejoinUserEventsResponse parseFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.RejoinUserEventsResponse parseDelimitedFrom(
+      java.io.InputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.RejoinUserEventsResponse parseDelimitedFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.RejoinUserEventsResponse parseFrom(
+      com.google.protobuf.CodedInputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.RejoinUserEventsResponse parseFrom(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  @java.lang.Override
+  public Builder newBuilderForType() {
+    return newBuilder();
+  }
+
+  public static Builder newBuilder() {
+    return DEFAULT_INSTANCE.toBuilder();
+  }
+
+  public static Builder newBuilder(com.google.cloud.retail.v2.RejoinUserEventsResponse prototype) {
+    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+  }
+
+  @java.lang.Override
+  public Builder toBuilder() {
+    return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
+  }
+
+  @java.lang.Override
+  protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+    Builder builder = new Builder(parent);
+    return builder;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Response message for RejoinUserEvents method.
+   * </pre>
+   *
+   * Protobuf type {@code google.cloud.retail.v2.RejoinUserEventsResponse}
+   */
+  public static final class Builder extends com.google.protobuf.GeneratedMessageV3.Builder<Builder>
+      implements
+      // @@protoc_insertion_point(builder_implements:google.cloud.retail.v2.RejoinUserEventsResponse)
+      com.google.cloud.retail.v2.RejoinUserEventsResponseOrBuilder {
+    public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+      return com.google.cloud.retail.v2.UserEventServiceProto
+          .internal_static_google_cloud_retail_v2_RejoinUserEventsResponse_descriptor;
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return com.google.cloud.retail.v2.UserEventServiceProto
+          .internal_static_google_cloud_retail_v2_RejoinUserEventsResponse_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              com.google.cloud.retail.v2.RejoinUserEventsResponse.class,
+              com.google.cloud.retail.v2.RejoinUserEventsResponse.Builder.class);
+    }
+
+    // Construct using com.google.cloud.retail.v2.RejoinUserEventsResponse.newBuilder()
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
+
+    private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+      super(parent);
+      maybeForceBuilderInitialization();
+    }
+
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders) {}
+    }
+
+    @java.lang.Override
+    public Builder clear() {
+      super.clear();
+      rejoinedUserEventsCount_ = 0L;
+
+      return this;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
+      return com.google.cloud.retail.v2.UserEventServiceProto
+          .internal_static_google_cloud_retail_v2_RejoinUserEventsResponse_descriptor;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.RejoinUserEventsResponse getDefaultInstanceForType() {
+      return com.google.cloud.retail.v2.RejoinUserEventsResponse.getDefaultInstance();
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.RejoinUserEventsResponse build() {
+      com.google.cloud.retail.v2.RejoinUserEventsResponse result = buildPartial();
+      if (!result.isInitialized()) {
+        throw newUninitializedMessageException(result);
+      }
+      return result;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.RejoinUserEventsResponse buildPartial() {
+      com.google.cloud.retail.v2.RejoinUserEventsResponse result =
+          new com.google.cloud.retail.v2.RejoinUserEventsResponse(this);
+      result.rejoinedUserEventsCount_ = rejoinedUserEventsCount_;
+      onBuilt();
+      return result;
+    }
+
+    @java.lang.Override
+    public Builder clone() {
+      return super.clone();
+    }
+
+    @java.lang.Override
+    public Builder setField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.setField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
+      return super.clearField(field);
+    }
+
+    @java.lang.Override
+    public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+      return super.clearOneof(oneof);
+    }
+
+    @java.lang.Override
+    public Builder setRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, int index, java.lang.Object value) {
+      return super.setRepeatedField(field, index, value);
+    }
+
+    @java.lang.Override
+    public Builder addRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.addRepeatedField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(com.google.protobuf.Message other) {
+      if (other instanceof com.google.cloud.retail.v2.RejoinUserEventsResponse) {
+        return mergeFrom((com.google.cloud.retail.v2.RejoinUserEventsResponse) other);
+      } else {
+        super.mergeFrom(other);
+        return this;
+      }
+    }
+
+    public Builder mergeFrom(com.google.cloud.retail.v2.RejoinUserEventsResponse other) {
+      if (other == com.google.cloud.retail.v2.RejoinUserEventsResponse.getDefaultInstance())
+        return this;
+      if (other.getRejoinedUserEventsCount() != 0L) {
+        setRejoinedUserEventsCount(other.getRejoinedUserEventsCount());
+      }
+      this.mergeUnknownFields(other.unknownFields);
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final boolean isInitialized() {
+      return true;
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      com.google.cloud.retail.v2.RejoinUserEventsResponse parsedMessage = null;
+      try {
+        parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        parsedMessage =
+            (com.google.cloud.retail.v2.RejoinUserEventsResponse) e.getUnfinishedMessage();
+        throw e.unwrapIOException();
+      } finally {
+        if (parsedMessage != null) {
+          mergeFrom(parsedMessage);
+        }
+      }
+      return this;
+    }
+
+    private long rejoinedUserEventsCount_;
+    /**
+     *
+     *
+     * <pre>
+     * Number of user events that were joined with latest product catalog.
+     * </pre>
+     *
+     * <code>int64 rejoined_user_events_count = 1;</code>
+     *
+     * @return The rejoinedUserEventsCount.
+     */
+    @java.lang.Override
+    public long getRejoinedUserEventsCount() {
+      return rejoinedUserEventsCount_;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Number of user events that were joined with latest product catalog.
+     * </pre>
+     *
+     * <code>int64 rejoined_user_events_count = 1;</code>
+     *
+     * @param value The rejoinedUserEventsCount to set.
+     * @return This builder for chaining.
+     */
+    public Builder setRejoinedUserEventsCount(long value) {
+
+      rejoinedUserEventsCount_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Number of user events that were joined with latest product catalog.
+     * </pre>
+     *
+     * <code>int64 rejoined_user_events_count = 1;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearRejoinedUserEventsCount() {
+
+      rejoinedUserEventsCount_ = 0L;
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.setUnknownFields(unknownFields);
+    }
+
+    @java.lang.Override
+    public final Builder mergeUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.mergeUnknownFields(unknownFields);
+    }
+
+    // @@protoc_insertion_point(builder_scope:google.cloud.retail.v2.RejoinUserEventsResponse)
+  }
+
+  // @@protoc_insertion_point(class_scope:google.cloud.retail.v2.RejoinUserEventsResponse)
+  private static final com.google.cloud.retail.v2.RejoinUserEventsResponse DEFAULT_INSTANCE;
+
+  static {
+    DEFAULT_INSTANCE = new com.google.cloud.retail.v2.RejoinUserEventsResponse();
+  }
+
+  public static com.google.cloud.retail.v2.RejoinUserEventsResponse getDefaultInstance() {
+    return DEFAULT_INSTANCE;
+  }
+
+  private static final com.google.protobuf.Parser<RejoinUserEventsResponse> PARSER =
+      new com.google.protobuf.AbstractParser<RejoinUserEventsResponse>() {
+        @java.lang.Override
+        public RejoinUserEventsResponse parsePartialFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws com.google.protobuf.InvalidProtocolBufferException {
+          return new RejoinUserEventsResponse(input, extensionRegistry);
+        }
+      };
+
+  public static com.google.protobuf.Parser<RejoinUserEventsResponse> parser() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.protobuf.Parser<RejoinUserEventsResponse> getParserForType() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.cloud.retail.v2.RejoinUserEventsResponse getDefaultInstanceForType() {
+    return DEFAULT_INSTANCE;
+  }
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/RejoinUserEventsResponseOrBuilder.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/RejoinUserEventsResponseOrBuilder.java
new file mode 100644
index 00000000..5b2e5241
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/RejoinUserEventsResponseOrBuilder.java
@@ -0,0 +1,38 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/user_event_service.proto
+
+package com.google.cloud.retail.v2;
+
+public interface RejoinUserEventsResponseOrBuilder
+    extends
+    // @@protoc_insertion_point(interface_extends:google.cloud.retail.v2.RejoinUserEventsResponse)
+    com.google.protobuf.MessageOrBuilder {
+
+  /**
+   *
+   *
+   * <pre>
+   * Number of user events that were joined with latest product catalog.
+   * </pre>
+   *
+   * <code>int64 rejoined_user_events_count = 1;</code>
+   *
+   * @return The rejoinedUserEventsCount.
+   */
+  long getRejoinedUserEventsCount();
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/UpdateCatalogRequest.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/UpdateCatalogRequest.java
new file mode 100644
index 00000000..3c0e8986
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/UpdateCatalogRequest.java
@@ -0,0 +1,1149 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/catalog_service.proto
+
+package com.google.cloud.retail.v2;
+
+/**
+ *
+ *
+ * <pre>
+ * Request for
+ * [CatalogService.UpdateCatalog][google.cloud.retail.v2.CatalogService.UpdateCatalog]
+ * method.
+ * </pre>
+ *
+ * Protobuf type {@code google.cloud.retail.v2.UpdateCatalogRequest}
+ */
+public final class UpdateCatalogRequest extends com.google.protobuf.GeneratedMessageV3
+    implements
+    // @@protoc_insertion_point(message_implements:google.cloud.retail.v2.UpdateCatalogRequest)
+    UpdateCatalogRequestOrBuilder {
+  private static final long serialVersionUID = 0L;
+  // Use UpdateCatalogRequest.newBuilder() to construct.
+  private UpdateCatalogRequest(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+    super(builder);
+  }
+
+  private UpdateCatalogRequest() {}
+
+  @java.lang.Override
+  @SuppressWarnings({"unused"})
+  protected java.lang.Object newInstance(UnusedPrivateParameter unused) {
+    return new UpdateCatalogRequest();
+  }
+
+  @java.lang.Override
+  public final com.google.protobuf.UnknownFieldSet getUnknownFields() {
+    return this.unknownFields;
+  }
+
+  private UpdateCatalogRequest(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    this();
+    if (extensionRegistry == null) {
+      throw new java.lang.NullPointerException();
+    }
+    com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+        com.google.protobuf.UnknownFieldSet.newBuilder();
+    try {
+      boolean done = false;
+      while (!done) {
+        int tag = input.readTag();
+        switch (tag) {
+          case 0:
+            done = true;
+            break;
+          case 10:
+            {
+              com.google.cloud.retail.v2.Catalog.Builder subBuilder = null;
+              if (catalog_ != null) {
+                subBuilder = catalog_.toBuilder();
+              }
+              catalog_ =
+                  input.readMessage(com.google.cloud.retail.v2.Catalog.parser(), extensionRegistry);
+              if (subBuilder != null) {
+                subBuilder.mergeFrom(catalog_);
+                catalog_ = subBuilder.buildPartial();
+              }
+
+              break;
+            }
+          case 18:
+            {
+              com.google.protobuf.FieldMask.Builder subBuilder = null;
+              if (updateMask_ != null) {
+                subBuilder = updateMask_.toBuilder();
+              }
+              updateMask_ =
+                  input.readMessage(com.google.protobuf.FieldMask.parser(), extensionRegistry);
+              if (subBuilder != null) {
+                subBuilder.mergeFrom(updateMask_);
+                updateMask_ = subBuilder.buildPartial();
+              }
+
+              break;
+            }
+          default:
+            {
+              if (!parseUnknownField(input, unknownFields, extensionRegistry, tag)) {
+                done = true;
+              }
+              break;
+            }
+        }
+      }
+    } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+      throw e.setUnfinishedMessage(this);
+    } catch (java.io.IOException e) {
+      throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
+    } finally {
+      this.unknownFields = unknownFields.build();
+      makeExtensionsImmutable();
+    }
+  }
+
+  public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+    return com.google.cloud.retail.v2.CatalogServiceProto
+        .internal_static_google_cloud_retail_v2_UpdateCatalogRequest_descriptor;
+  }
+
+  @java.lang.Override
+  protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internalGetFieldAccessorTable() {
+    return com.google.cloud.retail.v2.CatalogServiceProto
+        .internal_static_google_cloud_retail_v2_UpdateCatalogRequest_fieldAccessorTable
+        .ensureFieldAccessorsInitialized(
+            com.google.cloud.retail.v2.UpdateCatalogRequest.class,
+            com.google.cloud.retail.v2.UpdateCatalogRequest.Builder.class);
+  }
+
+  public static final int CATALOG_FIELD_NUMBER = 1;
+  private com.google.cloud.retail.v2.Catalog catalog_;
+  /**
+   *
+   *
+   * <pre>
+   * Required. The [Catalog][google.cloud.retail.v2.Catalog] to update.
+   * If the caller does not have permission to update the
+   * [Catalog][google.cloud.retail.v2.Catalog], regardless of whether or not it
+   * exists, a PERMISSION_DENIED error is returned.
+   * If the [Catalog][google.cloud.retail.v2.Catalog] to update does not exist,
+   * a NOT_FOUND error is returned.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.Catalog catalog = 1 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   *
+   * @return Whether the catalog field is set.
+   */
+  @java.lang.Override
+  public boolean hasCatalog() {
+    return catalog_ != null;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Required. The [Catalog][google.cloud.retail.v2.Catalog] to update.
+   * If the caller does not have permission to update the
+   * [Catalog][google.cloud.retail.v2.Catalog], regardless of whether or not it
+   * exists, a PERMISSION_DENIED error is returned.
+   * If the [Catalog][google.cloud.retail.v2.Catalog] to update does not exist,
+   * a NOT_FOUND error is returned.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.Catalog catalog = 1 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   *
+   * @return The catalog.
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.Catalog getCatalog() {
+    return catalog_ == null ? com.google.cloud.retail.v2.Catalog.getDefaultInstance() : catalog_;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Required. The [Catalog][google.cloud.retail.v2.Catalog] to update.
+   * If the caller does not have permission to update the
+   * [Catalog][google.cloud.retail.v2.Catalog], regardless of whether or not it
+   * exists, a PERMISSION_DENIED error is returned.
+   * If the [Catalog][google.cloud.retail.v2.Catalog] to update does not exist,
+   * a NOT_FOUND error is returned.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.Catalog catalog = 1 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.CatalogOrBuilder getCatalogOrBuilder() {
+    return getCatalog();
+  }
+
+  public static final int UPDATE_MASK_FIELD_NUMBER = 2;
+  private com.google.protobuf.FieldMask updateMask_;
+  /**
+   *
+   *
+   * <pre>
+   * Indicates which fields in the provided
+   * [Catalog][google.cloud.retail.v2.Catalog] to update. If not set, will only
+   * update the
+   * [Catalog.product_level_config][google.cloud.retail.v2.Catalog.product_level_config]
+   * field, which is also the only currently supported field to update.
+   * If an unsupported or unknown field is provided, an INVALID_ARGUMENT error
+   * is returned.
+   * </pre>
+   *
+   * <code>.google.protobuf.FieldMask update_mask = 2;</code>
+   *
+   * @return Whether the updateMask field is set.
+   */
+  @java.lang.Override
+  public boolean hasUpdateMask() {
+    return updateMask_ != null;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Indicates which fields in the provided
+   * [Catalog][google.cloud.retail.v2.Catalog] to update. If not set, will only
+   * update the
+   * [Catalog.product_level_config][google.cloud.retail.v2.Catalog.product_level_config]
+   * field, which is also the only currently supported field to update.
+   * If an unsupported or unknown field is provided, an INVALID_ARGUMENT error
+   * is returned.
+   * </pre>
+   *
+   * <code>.google.protobuf.FieldMask update_mask = 2;</code>
+   *
+   * @return The updateMask.
+   */
+  @java.lang.Override
+  public com.google.protobuf.FieldMask getUpdateMask() {
+    return updateMask_ == null ? com.google.protobuf.FieldMask.getDefaultInstance() : updateMask_;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Indicates which fields in the provided
+   * [Catalog][google.cloud.retail.v2.Catalog] to update. If not set, will only
+   * update the
+   * [Catalog.product_level_config][google.cloud.retail.v2.Catalog.product_level_config]
+   * field, which is also the only currently supported field to update.
+   * If an unsupported or unknown field is provided, an INVALID_ARGUMENT error
+   * is returned.
+   * </pre>
+   *
+   * <code>.google.protobuf.FieldMask update_mask = 2;</code>
+   */
+  @java.lang.Override
+  public com.google.protobuf.FieldMaskOrBuilder getUpdateMaskOrBuilder() {
+    return getUpdateMask();
+  }
+
+  private byte memoizedIsInitialized = -1;
+
+  @java.lang.Override
+  public final boolean isInitialized() {
+    byte isInitialized = memoizedIsInitialized;
+    if (isInitialized == 1) return true;
+    if (isInitialized == 0) return false;
+
+    memoizedIsInitialized = 1;
+    return true;
+  }
+
+  @java.lang.Override
+  public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
+    if (catalog_ != null) {
+      output.writeMessage(1, getCatalog());
+    }
+    if (updateMask_ != null) {
+      output.writeMessage(2, getUpdateMask());
+    }
+    unknownFields.writeTo(output);
+  }
+
+  @java.lang.Override
+  public int getSerializedSize() {
+    int size = memoizedSize;
+    if (size != -1) return size;
+
+    size = 0;
+    if (catalog_ != null) {
+      size += com.google.protobuf.CodedOutputStream.computeMessageSize(1, getCatalog());
+    }
+    if (updateMask_ != null) {
+      size += com.google.protobuf.CodedOutputStream.computeMessageSize(2, getUpdateMask());
+    }
+    size += unknownFields.getSerializedSize();
+    memoizedSize = size;
+    return size;
+  }
+
+  @java.lang.Override
+  public boolean equals(final java.lang.Object obj) {
+    if (obj == this) {
+      return true;
+    }
+    if (!(obj instanceof com.google.cloud.retail.v2.UpdateCatalogRequest)) {
+      return super.equals(obj);
+    }
+    com.google.cloud.retail.v2.UpdateCatalogRequest other =
+        (com.google.cloud.retail.v2.UpdateCatalogRequest) obj;
+
+    if (hasCatalog() != other.hasCatalog()) return false;
+    if (hasCatalog()) {
+      if (!getCatalog().equals(other.getCatalog())) return false;
+    }
+    if (hasUpdateMask() != other.hasUpdateMask()) return false;
+    if (hasUpdateMask()) {
+      if (!getUpdateMask().equals(other.getUpdateMask())) return false;
+    }
+    if (!unknownFields.equals(other.unknownFields)) return false;
+    return true;
+  }
+
+  @java.lang.Override
+  public int hashCode() {
+    if (memoizedHashCode != 0) {
+      return memoizedHashCode;
+    }
+    int hash = 41;
+    hash = (19 * hash) + getDescriptor().hashCode();
+    if (hasCatalog()) {
+      hash = (37 * hash) + CATALOG_FIELD_NUMBER;
+      hash = (53 * hash) + getCatalog().hashCode();
+    }
+    if (hasUpdateMask()) {
+      hash = (37 * hash) + UPDATE_MASK_FIELD_NUMBER;
+      hash = (53 * hash) + getUpdateMask().hashCode();
+    }
+    hash = (29 * hash) + unknownFields.hashCode();
+    memoizedHashCode = hash;
+    return hash;
+  }
+
+  public static com.google.cloud.retail.v2.UpdateCatalogRequest parseFrom(java.nio.ByteBuffer data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.UpdateCatalogRequest parseFrom(
+      java.nio.ByteBuffer data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.UpdateCatalogRequest parseFrom(
+      com.google.protobuf.ByteString data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.UpdateCatalogRequest parseFrom(
+      com.google.protobuf.ByteString data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.UpdateCatalogRequest parseFrom(byte[] data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.UpdateCatalogRequest parseFrom(
+      byte[] data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.UpdateCatalogRequest parseFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.UpdateCatalogRequest parseFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.UpdateCatalogRequest parseDelimitedFrom(
+      java.io.InputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.UpdateCatalogRequest parseDelimitedFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.UpdateCatalogRequest parseFrom(
+      com.google.protobuf.CodedInputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.UpdateCatalogRequest parseFrom(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  @java.lang.Override
+  public Builder newBuilderForType() {
+    return newBuilder();
+  }
+
+  public static Builder newBuilder() {
+    return DEFAULT_INSTANCE.toBuilder();
+  }
+
+  public static Builder newBuilder(com.google.cloud.retail.v2.UpdateCatalogRequest prototype) {
+    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+  }
+
+  @java.lang.Override
+  public Builder toBuilder() {
+    return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
+  }
+
+  @java.lang.Override
+  protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+    Builder builder = new Builder(parent);
+    return builder;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Request for
+   * [CatalogService.UpdateCatalog][google.cloud.retail.v2.CatalogService.UpdateCatalog]
+   * method.
+   * </pre>
+   *
+   * Protobuf type {@code google.cloud.retail.v2.UpdateCatalogRequest}
+   */
+  public static final class Builder extends com.google.protobuf.GeneratedMessageV3.Builder<Builder>
+      implements
+      // @@protoc_insertion_point(builder_implements:google.cloud.retail.v2.UpdateCatalogRequest)
+      com.google.cloud.retail.v2.UpdateCatalogRequestOrBuilder {
+    public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+      return com.google.cloud.retail.v2.CatalogServiceProto
+          .internal_static_google_cloud_retail_v2_UpdateCatalogRequest_descriptor;
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return com.google.cloud.retail.v2.CatalogServiceProto
+          .internal_static_google_cloud_retail_v2_UpdateCatalogRequest_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              com.google.cloud.retail.v2.UpdateCatalogRequest.class,
+              com.google.cloud.retail.v2.UpdateCatalogRequest.Builder.class);
+    }
+
+    // Construct using com.google.cloud.retail.v2.UpdateCatalogRequest.newBuilder()
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
+
+    private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+      super(parent);
+      maybeForceBuilderInitialization();
+    }
+
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders) {}
+    }
+
+    @java.lang.Override
+    public Builder clear() {
+      super.clear();
+      if (catalogBuilder_ == null) {
+        catalog_ = null;
+      } else {
+        catalog_ = null;
+        catalogBuilder_ = null;
+      }
+      if (updateMaskBuilder_ == null) {
+        updateMask_ = null;
+      } else {
+        updateMask_ = null;
+        updateMaskBuilder_ = null;
+      }
+      return this;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
+      return com.google.cloud.retail.v2.CatalogServiceProto
+          .internal_static_google_cloud_retail_v2_UpdateCatalogRequest_descriptor;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.UpdateCatalogRequest getDefaultInstanceForType() {
+      return com.google.cloud.retail.v2.UpdateCatalogRequest.getDefaultInstance();
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.UpdateCatalogRequest build() {
+      com.google.cloud.retail.v2.UpdateCatalogRequest result = buildPartial();
+      if (!result.isInitialized()) {
+        throw newUninitializedMessageException(result);
+      }
+      return result;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.UpdateCatalogRequest buildPartial() {
+      com.google.cloud.retail.v2.UpdateCatalogRequest result =
+          new com.google.cloud.retail.v2.UpdateCatalogRequest(this);
+      if (catalogBuilder_ == null) {
+        result.catalog_ = catalog_;
+      } else {
+        result.catalog_ = catalogBuilder_.build();
+      }
+      if (updateMaskBuilder_ == null) {
+        result.updateMask_ = updateMask_;
+      } else {
+        result.updateMask_ = updateMaskBuilder_.build();
+      }
+      onBuilt();
+      return result;
+    }
+
+    @java.lang.Override
+    public Builder clone() {
+      return super.clone();
+    }
+
+    @java.lang.Override
+    public Builder setField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.setField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
+      return super.clearField(field);
+    }
+
+    @java.lang.Override
+    public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+      return super.clearOneof(oneof);
+    }
+
+    @java.lang.Override
+    public Builder setRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, int index, java.lang.Object value) {
+      return super.setRepeatedField(field, index, value);
+    }
+
+    @java.lang.Override
+    public Builder addRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.addRepeatedField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(com.google.protobuf.Message other) {
+      if (other instanceof com.google.cloud.retail.v2.UpdateCatalogRequest) {
+        return mergeFrom((com.google.cloud.retail.v2.UpdateCatalogRequest) other);
+      } else {
+        super.mergeFrom(other);
+        return this;
+      }
+    }
+
+    public Builder mergeFrom(com.google.cloud.retail.v2.UpdateCatalogRequest other) {
+      if (other == com.google.cloud.retail.v2.UpdateCatalogRequest.getDefaultInstance())
+        return this;
+      if (other.hasCatalog()) {
+        mergeCatalog(other.getCatalog());
+      }
+      if (other.hasUpdateMask()) {
+        mergeUpdateMask(other.getUpdateMask());
+      }
+      this.mergeUnknownFields(other.unknownFields);
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final boolean isInitialized() {
+      return true;
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      com.google.cloud.retail.v2.UpdateCatalogRequest parsedMessage = null;
+      try {
+        parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        parsedMessage = (com.google.cloud.retail.v2.UpdateCatalogRequest) e.getUnfinishedMessage();
+        throw e.unwrapIOException();
+      } finally {
+        if (parsedMessage != null) {
+          mergeFrom(parsedMessage);
+        }
+      }
+      return this;
+    }
+
+    private com.google.cloud.retail.v2.Catalog catalog_;
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.cloud.retail.v2.Catalog,
+            com.google.cloud.retail.v2.Catalog.Builder,
+            com.google.cloud.retail.v2.CatalogOrBuilder>
+        catalogBuilder_;
+    /**
+     *
+     *
+     * <pre>
+     * Required. The [Catalog][google.cloud.retail.v2.Catalog] to update.
+     * If the caller does not have permission to update the
+     * [Catalog][google.cloud.retail.v2.Catalog], regardless of whether or not it
+     * exists, a PERMISSION_DENIED error is returned.
+     * If the [Catalog][google.cloud.retail.v2.Catalog] to update does not exist,
+     * a NOT_FOUND error is returned.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.Catalog catalog = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     *
+     * @return Whether the catalog field is set.
+     */
+    public boolean hasCatalog() {
+      return catalogBuilder_ != null || catalog_ != null;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The [Catalog][google.cloud.retail.v2.Catalog] to update.
+     * If the caller does not have permission to update the
+     * [Catalog][google.cloud.retail.v2.Catalog], regardless of whether or not it
+     * exists, a PERMISSION_DENIED error is returned.
+     * If the [Catalog][google.cloud.retail.v2.Catalog] to update does not exist,
+     * a NOT_FOUND error is returned.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.Catalog catalog = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     *
+     * @return The catalog.
+     */
+    public com.google.cloud.retail.v2.Catalog getCatalog() {
+      if (catalogBuilder_ == null) {
+        return catalog_ == null
+            ? com.google.cloud.retail.v2.Catalog.getDefaultInstance()
+            : catalog_;
+      } else {
+        return catalogBuilder_.getMessage();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The [Catalog][google.cloud.retail.v2.Catalog] to update.
+     * If the caller does not have permission to update the
+     * [Catalog][google.cloud.retail.v2.Catalog], regardless of whether or not it
+     * exists, a PERMISSION_DENIED error is returned.
+     * If the [Catalog][google.cloud.retail.v2.Catalog] to update does not exist,
+     * a NOT_FOUND error is returned.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.Catalog catalog = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder setCatalog(com.google.cloud.retail.v2.Catalog value) {
+      if (catalogBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        catalog_ = value;
+        onChanged();
+      } else {
+        catalogBuilder_.setMessage(value);
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The [Catalog][google.cloud.retail.v2.Catalog] to update.
+     * If the caller does not have permission to update the
+     * [Catalog][google.cloud.retail.v2.Catalog], regardless of whether or not it
+     * exists, a PERMISSION_DENIED error is returned.
+     * If the [Catalog][google.cloud.retail.v2.Catalog] to update does not exist,
+     * a NOT_FOUND error is returned.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.Catalog catalog = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder setCatalog(com.google.cloud.retail.v2.Catalog.Builder builderForValue) {
+      if (catalogBuilder_ == null) {
+        catalog_ = builderForValue.build();
+        onChanged();
+      } else {
+        catalogBuilder_.setMessage(builderForValue.build());
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The [Catalog][google.cloud.retail.v2.Catalog] to update.
+     * If the caller does not have permission to update the
+     * [Catalog][google.cloud.retail.v2.Catalog], regardless of whether or not it
+     * exists, a PERMISSION_DENIED error is returned.
+     * If the [Catalog][google.cloud.retail.v2.Catalog] to update does not exist,
+     * a NOT_FOUND error is returned.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.Catalog catalog = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder mergeCatalog(com.google.cloud.retail.v2.Catalog value) {
+      if (catalogBuilder_ == null) {
+        if (catalog_ != null) {
+          catalog_ =
+              com.google.cloud.retail.v2.Catalog.newBuilder(catalog_)
+                  .mergeFrom(value)
+                  .buildPartial();
+        } else {
+          catalog_ = value;
+        }
+        onChanged();
+      } else {
+        catalogBuilder_.mergeFrom(value);
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The [Catalog][google.cloud.retail.v2.Catalog] to update.
+     * If the caller does not have permission to update the
+     * [Catalog][google.cloud.retail.v2.Catalog], regardless of whether or not it
+     * exists, a PERMISSION_DENIED error is returned.
+     * If the [Catalog][google.cloud.retail.v2.Catalog] to update does not exist,
+     * a NOT_FOUND error is returned.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.Catalog catalog = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder clearCatalog() {
+      if (catalogBuilder_ == null) {
+        catalog_ = null;
+        onChanged();
+      } else {
+        catalog_ = null;
+        catalogBuilder_ = null;
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The [Catalog][google.cloud.retail.v2.Catalog] to update.
+     * If the caller does not have permission to update the
+     * [Catalog][google.cloud.retail.v2.Catalog], regardless of whether or not it
+     * exists, a PERMISSION_DENIED error is returned.
+     * If the [Catalog][google.cloud.retail.v2.Catalog] to update does not exist,
+     * a NOT_FOUND error is returned.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.Catalog catalog = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public com.google.cloud.retail.v2.Catalog.Builder getCatalogBuilder() {
+
+      onChanged();
+      return getCatalogFieldBuilder().getBuilder();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The [Catalog][google.cloud.retail.v2.Catalog] to update.
+     * If the caller does not have permission to update the
+     * [Catalog][google.cloud.retail.v2.Catalog], regardless of whether or not it
+     * exists, a PERMISSION_DENIED error is returned.
+     * If the [Catalog][google.cloud.retail.v2.Catalog] to update does not exist,
+     * a NOT_FOUND error is returned.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.Catalog catalog = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public com.google.cloud.retail.v2.CatalogOrBuilder getCatalogOrBuilder() {
+      if (catalogBuilder_ != null) {
+        return catalogBuilder_.getMessageOrBuilder();
+      } else {
+        return catalog_ == null
+            ? com.google.cloud.retail.v2.Catalog.getDefaultInstance()
+            : catalog_;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The [Catalog][google.cloud.retail.v2.Catalog] to update.
+     * If the caller does not have permission to update the
+     * [Catalog][google.cloud.retail.v2.Catalog], regardless of whether or not it
+     * exists, a PERMISSION_DENIED error is returned.
+     * If the [Catalog][google.cloud.retail.v2.Catalog] to update does not exist,
+     * a NOT_FOUND error is returned.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.Catalog catalog = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.cloud.retail.v2.Catalog,
+            com.google.cloud.retail.v2.Catalog.Builder,
+            com.google.cloud.retail.v2.CatalogOrBuilder>
+        getCatalogFieldBuilder() {
+      if (catalogBuilder_ == null) {
+        catalogBuilder_ =
+            new com.google.protobuf.SingleFieldBuilderV3<
+                com.google.cloud.retail.v2.Catalog,
+                com.google.cloud.retail.v2.Catalog.Builder,
+                com.google.cloud.retail.v2.CatalogOrBuilder>(
+                getCatalog(), getParentForChildren(), isClean());
+        catalog_ = null;
+      }
+      return catalogBuilder_;
+    }
+
+    private com.google.protobuf.FieldMask updateMask_;
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.protobuf.FieldMask,
+            com.google.protobuf.FieldMask.Builder,
+            com.google.protobuf.FieldMaskOrBuilder>
+        updateMaskBuilder_;
+    /**
+     *
+     *
+     * <pre>
+     * Indicates which fields in the provided
+     * [Catalog][google.cloud.retail.v2.Catalog] to update. If not set, will only
+     * update the
+     * [Catalog.product_level_config][google.cloud.retail.v2.Catalog.product_level_config]
+     * field, which is also the only currently supported field to update.
+     * If an unsupported or unknown field is provided, an INVALID_ARGUMENT error
+     * is returned.
+     * </pre>
+     *
+     * <code>.google.protobuf.FieldMask update_mask = 2;</code>
+     *
+     * @return Whether the updateMask field is set.
+     */
+    public boolean hasUpdateMask() {
+      return updateMaskBuilder_ != null || updateMask_ != null;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Indicates which fields in the provided
+     * [Catalog][google.cloud.retail.v2.Catalog] to update. If not set, will only
+     * update the
+     * [Catalog.product_level_config][google.cloud.retail.v2.Catalog.product_level_config]
+     * field, which is also the only currently supported field to update.
+     * If an unsupported or unknown field is provided, an INVALID_ARGUMENT error
+     * is returned.
+     * </pre>
+     *
+     * <code>.google.protobuf.FieldMask update_mask = 2;</code>
+     *
+     * @return The updateMask.
+     */
+    public com.google.protobuf.FieldMask getUpdateMask() {
+      if (updateMaskBuilder_ == null) {
+        return updateMask_ == null
+            ? com.google.protobuf.FieldMask.getDefaultInstance()
+            : updateMask_;
+      } else {
+        return updateMaskBuilder_.getMessage();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Indicates which fields in the provided
+     * [Catalog][google.cloud.retail.v2.Catalog] to update. If not set, will only
+     * update the
+     * [Catalog.product_level_config][google.cloud.retail.v2.Catalog.product_level_config]
+     * field, which is also the only currently supported field to update.
+     * If an unsupported or unknown field is provided, an INVALID_ARGUMENT error
+     * is returned.
+     * </pre>
+     *
+     * <code>.google.protobuf.FieldMask update_mask = 2;</code>
+     */
+    public Builder setUpdateMask(com.google.protobuf.FieldMask value) {
+      if (updateMaskBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        updateMask_ = value;
+        onChanged();
+      } else {
+        updateMaskBuilder_.setMessage(value);
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Indicates which fields in the provided
+     * [Catalog][google.cloud.retail.v2.Catalog] to update. If not set, will only
+     * update the
+     * [Catalog.product_level_config][google.cloud.retail.v2.Catalog.product_level_config]
+     * field, which is also the only currently supported field to update.
+     * If an unsupported or unknown field is provided, an INVALID_ARGUMENT error
+     * is returned.
+     * </pre>
+     *
+     * <code>.google.protobuf.FieldMask update_mask = 2;</code>
+     */
+    public Builder setUpdateMask(com.google.protobuf.FieldMask.Builder builderForValue) {
+      if (updateMaskBuilder_ == null) {
+        updateMask_ = builderForValue.build();
+        onChanged();
+      } else {
+        updateMaskBuilder_.setMessage(builderForValue.build());
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Indicates which fields in the provided
+     * [Catalog][google.cloud.retail.v2.Catalog] to update. If not set, will only
+     * update the
+     * [Catalog.product_level_config][google.cloud.retail.v2.Catalog.product_level_config]
+     * field, which is also the only currently supported field to update.
+     * If an unsupported or unknown field is provided, an INVALID_ARGUMENT error
+     * is returned.
+     * </pre>
+     *
+     * <code>.google.protobuf.FieldMask update_mask = 2;</code>
+     */
+    public Builder mergeUpdateMask(com.google.protobuf.FieldMask value) {
+      if (updateMaskBuilder_ == null) {
+        if (updateMask_ != null) {
+          updateMask_ =
+              com.google.protobuf.FieldMask.newBuilder(updateMask_).mergeFrom(value).buildPartial();
+        } else {
+          updateMask_ = value;
+        }
+        onChanged();
+      } else {
+        updateMaskBuilder_.mergeFrom(value);
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Indicates which fields in the provided
+     * [Catalog][google.cloud.retail.v2.Catalog] to update. If not set, will only
+     * update the
+     * [Catalog.product_level_config][google.cloud.retail.v2.Catalog.product_level_config]
+     * field, which is also the only currently supported field to update.
+     * If an unsupported or unknown field is provided, an INVALID_ARGUMENT error
+     * is returned.
+     * </pre>
+     *
+     * <code>.google.protobuf.FieldMask update_mask = 2;</code>
+     */
+    public Builder clearUpdateMask() {
+      if (updateMaskBuilder_ == null) {
+        updateMask_ = null;
+        onChanged();
+      } else {
+        updateMask_ = null;
+        updateMaskBuilder_ = null;
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Indicates which fields in the provided
+     * [Catalog][google.cloud.retail.v2.Catalog] to update. If not set, will only
+     * update the
+     * [Catalog.product_level_config][google.cloud.retail.v2.Catalog.product_level_config]
+     * field, which is also the only currently supported field to update.
+     * If an unsupported or unknown field is provided, an INVALID_ARGUMENT error
+     * is returned.
+     * </pre>
+     *
+     * <code>.google.protobuf.FieldMask update_mask = 2;</code>
+     */
+    public com.google.protobuf.FieldMask.Builder getUpdateMaskBuilder() {
+
+      onChanged();
+      return getUpdateMaskFieldBuilder().getBuilder();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Indicates which fields in the provided
+     * [Catalog][google.cloud.retail.v2.Catalog] to update. If not set, will only
+     * update the
+     * [Catalog.product_level_config][google.cloud.retail.v2.Catalog.product_level_config]
+     * field, which is also the only currently supported field to update.
+     * If an unsupported or unknown field is provided, an INVALID_ARGUMENT error
+     * is returned.
+     * </pre>
+     *
+     * <code>.google.protobuf.FieldMask update_mask = 2;</code>
+     */
+    public com.google.protobuf.FieldMaskOrBuilder getUpdateMaskOrBuilder() {
+      if (updateMaskBuilder_ != null) {
+        return updateMaskBuilder_.getMessageOrBuilder();
+      } else {
+        return updateMask_ == null
+            ? com.google.protobuf.FieldMask.getDefaultInstance()
+            : updateMask_;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Indicates which fields in the provided
+     * [Catalog][google.cloud.retail.v2.Catalog] to update. If not set, will only
+     * update the
+     * [Catalog.product_level_config][google.cloud.retail.v2.Catalog.product_level_config]
+     * field, which is also the only currently supported field to update.
+     * If an unsupported or unknown field is provided, an INVALID_ARGUMENT error
+     * is returned.
+     * </pre>
+     *
+     * <code>.google.protobuf.FieldMask update_mask = 2;</code>
+     */
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.protobuf.FieldMask,
+            com.google.protobuf.FieldMask.Builder,
+            com.google.protobuf.FieldMaskOrBuilder>
+        getUpdateMaskFieldBuilder() {
+      if (updateMaskBuilder_ == null) {
+        updateMaskBuilder_ =
+            new com.google.protobuf.SingleFieldBuilderV3<
+                com.google.protobuf.FieldMask,
+                com.google.protobuf.FieldMask.Builder,
+                com.google.protobuf.FieldMaskOrBuilder>(
+                getUpdateMask(), getParentForChildren(), isClean());
+        updateMask_ = null;
+      }
+      return updateMaskBuilder_;
+    }
+
+    @java.lang.Override
+    public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.setUnknownFields(unknownFields);
+    }
+
+    @java.lang.Override
+    public final Builder mergeUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.mergeUnknownFields(unknownFields);
+    }
+
+    // @@protoc_insertion_point(builder_scope:google.cloud.retail.v2.UpdateCatalogRequest)
+  }
+
+  // @@protoc_insertion_point(class_scope:google.cloud.retail.v2.UpdateCatalogRequest)
+  private static final com.google.cloud.retail.v2.UpdateCatalogRequest DEFAULT_INSTANCE;
+
+  static {
+    DEFAULT_INSTANCE = new com.google.cloud.retail.v2.UpdateCatalogRequest();
+  }
+
+  public static com.google.cloud.retail.v2.UpdateCatalogRequest getDefaultInstance() {
+    return DEFAULT_INSTANCE;
+  }
+
+  private static final com.google.protobuf.Parser<UpdateCatalogRequest> PARSER =
+      new com.google.protobuf.AbstractParser<UpdateCatalogRequest>() {
+        @java.lang.Override
+        public UpdateCatalogRequest parsePartialFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws com.google.protobuf.InvalidProtocolBufferException {
+          return new UpdateCatalogRequest(input, extensionRegistry);
+        }
+      };
+
+  public static com.google.protobuf.Parser<UpdateCatalogRequest> parser() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.protobuf.Parser<UpdateCatalogRequest> getParserForType() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.cloud.retail.v2.UpdateCatalogRequest getDefaultInstanceForType() {
+    return DEFAULT_INSTANCE;
+  }
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/UpdateCatalogRequestOrBuilder.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/UpdateCatalogRequestOrBuilder.java
new file mode 100644
index 00000000..77224b10
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/UpdateCatalogRequestOrBuilder.java
@@ -0,0 +1,131 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/catalog_service.proto
+
+package com.google.cloud.retail.v2;
+
+public interface UpdateCatalogRequestOrBuilder
+    extends
+    // @@protoc_insertion_point(interface_extends:google.cloud.retail.v2.UpdateCatalogRequest)
+    com.google.protobuf.MessageOrBuilder {
+
+  /**
+   *
+   *
+   * <pre>
+   * Required. The [Catalog][google.cloud.retail.v2.Catalog] to update.
+   * If the caller does not have permission to update the
+   * [Catalog][google.cloud.retail.v2.Catalog], regardless of whether or not it
+   * exists, a PERMISSION_DENIED error is returned.
+   * If the [Catalog][google.cloud.retail.v2.Catalog] to update does not exist,
+   * a NOT_FOUND error is returned.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.Catalog catalog = 1 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   *
+   * @return Whether the catalog field is set.
+   */
+  boolean hasCatalog();
+  /**
+   *
+   *
+   * <pre>
+   * Required. The [Catalog][google.cloud.retail.v2.Catalog] to update.
+   * If the caller does not have permission to update the
+   * [Catalog][google.cloud.retail.v2.Catalog], regardless of whether or not it
+   * exists, a PERMISSION_DENIED error is returned.
+   * If the [Catalog][google.cloud.retail.v2.Catalog] to update does not exist,
+   * a NOT_FOUND error is returned.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.Catalog catalog = 1 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   *
+   * @return The catalog.
+   */
+  com.google.cloud.retail.v2.Catalog getCatalog();
+  /**
+   *
+   *
+   * <pre>
+   * Required. The [Catalog][google.cloud.retail.v2.Catalog] to update.
+   * If the caller does not have permission to update the
+   * [Catalog][google.cloud.retail.v2.Catalog], regardless of whether or not it
+   * exists, a PERMISSION_DENIED error is returned.
+   * If the [Catalog][google.cloud.retail.v2.Catalog] to update does not exist,
+   * a NOT_FOUND error is returned.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.Catalog catalog = 1 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   */
+  com.google.cloud.retail.v2.CatalogOrBuilder getCatalogOrBuilder();
+
+  /**
+   *
+   *
+   * <pre>
+   * Indicates which fields in the provided
+   * [Catalog][google.cloud.retail.v2.Catalog] to update. If not set, will only
+   * update the
+   * [Catalog.product_level_config][google.cloud.retail.v2.Catalog.product_level_config]
+   * field, which is also the only currently supported field to update.
+   * If an unsupported or unknown field is provided, an INVALID_ARGUMENT error
+   * is returned.
+   * </pre>
+   *
+   * <code>.google.protobuf.FieldMask update_mask = 2;</code>
+   *
+   * @return Whether the updateMask field is set.
+   */
+  boolean hasUpdateMask();
+  /**
+   *
+   *
+   * <pre>
+   * Indicates which fields in the provided
+   * [Catalog][google.cloud.retail.v2.Catalog] to update. If not set, will only
+   * update the
+   * [Catalog.product_level_config][google.cloud.retail.v2.Catalog.product_level_config]
+   * field, which is also the only currently supported field to update.
+   * If an unsupported or unknown field is provided, an INVALID_ARGUMENT error
+   * is returned.
+   * </pre>
+   *
+   * <code>.google.protobuf.FieldMask update_mask = 2;</code>
+   *
+   * @return The updateMask.
+   */
+  com.google.protobuf.FieldMask getUpdateMask();
+  /**
+   *
+   *
+   * <pre>
+   * Indicates which fields in the provided
+   * [Catalog][google.cloud.retail.v2.Catalog] to update. If not set, will only
+   * update the
+   * [Catalog.product_level_config][google.cloud.retail.v2.Catalog.product_level_config]
+   * field, which is also the only currently supported field to update.
+   * If an unsupported or unknown field is provided, an INVALID_ARGUMENT error
+   * is returned.
+   * </pre>
+   *
+   * <code>.google.protobuf.FieldMask update_mask = 2;</code>
+   */
+  com.google.protobuf.FieldMaskOrBuilder getUpdateMaskOrBuilder();
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/UpdateProductRequest.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/UpdateProductRequest.java
new file mode 100644
index 00000000..d40dffa6
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/UpdateProductRequest.java
@@ -0,0 +1,1133 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/product_service.proto
+
+package com.google.cloud.retail.v2;
+
+/**
+ *
+ *
+ * <pre>
+ * Request message for [UpdateProduct][] method.
+ * </pre>
+ *
+ * Protobuf type {@code google.cloud.retail.v2.UpdateProductRequest}
+ */
+public final class UpdateProductRequest extends com.google.protobuf.GeneratedMessageV3
+    implements
+    // @@protoc_insertion_point(message_implements:google.cloud.retail.v2.UpdateProductRequest)
+    UpdateProductRequestOrBuilder {
+  private static final long serialVersionUID = 0L;
+  // Use UpdateProductRequest.newBuilder() to construct.
+  private UpdateProductRequest(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+    super(builder);
+  }
+
+  private UpdateProductRequest() {}
+
+  @java.lang.Override
+  @SuppressWarnings({"unused"})
+  protected java.lang.Object newInstance(UnusedPrivateParameter unused) {
+    return new UpdateProductRequest();
+  }
+
+  @java.lang.Override
+  public final com.google.protobuf.UnknownFieldSet getUnknownFields() {
+    return this.unknownFields;
+  }
+
+  private UpdateProductRequest(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    this();
+    if (extensionRegistry == null) {
+      throw new java.lang.NullPointerException();
+    }
+    com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+        com.google.protobuf.UnknownFieldSet.newBuilder();
+    try {
+      boolean done = false;
+      while (!done) {
+        int tag = input.readTag();
+        switch (tag) {
+          case 0:
+            done = true;
+            break;
+          case 10:
+            {
+              com.google.cloud.retail.v2.Product.Builder subBuilder = null;
+              if (product_ != null) {
+                subBuilder = product_.toBuilder();
+              }
+              product_ =
+                  input.readMessage(com.google.cloud.retail.v2.Product.parser(), extensionRegistry);
+              if (subBuilder != null) {
+                subBuilder.mergeFrom(product_);
+                product_ = subBuilder.buildPartial();
+              }
+
+              break;
+            }
+          case 18:
+            {
+              com.google.protobuf.FieldMask.Builder subBuilder = null;
+              if (updateMask_ != null) {
+                subBuilder = updateMask_.toBuilder();
+              }
+              updateMask_ =
+                  input.readMessage(com.google.protobuf.FieldMask.parser(), extensionRegistry);
+              if (subBuilder != null) {
+                subBuilder.mergeFrom(updateMask_);
+                updateMask_ = subBuilder.buildPartial();
+              }
+
+              break;
+            }
+          default:
+            {
+              if (!parseUnknownField(input, unknownFields, extensionRegistry, tag)) {
+                done = true;
+              }
+              break;
+            }
+        }
+      }
+    } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+      throw e.setUnfinishedMessage(this);
+    } catch (java.io.IOException e) {
+      throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
+    } finally {
+      this.unknownFields = unknownFields.build();
+      makeExtensionsImmutable();
+    }
+  }
+
+  public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+    return com.google.cloud.retail.v2.ProductServiceProto
+        .internal_static_google_cloud_retail_v2_UpdateProductRequest_descriptor;
+  }
+
+  @java.lang.Override
+  protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internalGetFieldAccessorTable() {
+    return com.google.cloud.retail.v2.ProductServiceProto
+        .internal_static_google_cloud_retail_v2_UpdateProductRequest_fieldAccessorTable
+        .ensureFieldAccessorsInitialized(
+            com.google.cloud.retail.v2.UpdateProductRequest.class,
+            com.google.cloud.retail.v2.UpdateProductRequest.Builder.class);
+  }
+
+  public static final int PRODUCT_FIELD_NUMBER = 1;
+  private com.google.cloud.retail.v2.Product product_;
+  /**
+   *
+   *
+   * <pre>
+   * Required. The product to update/create.
+   * If the caller does not have permission to update the
+   * [Product][google.cloud.retail.v2.Product], regardless of whether or not it
+   * exists, a PERMISSION_DENIED error is returned.
+   * If the [Product][google.cloud.retail.v2.Product] to update does not exist,
+   * a NOT_FOUND error is returned.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.Product product = 1 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   *
+   * @return Whether the product field is set.
+   */
+  @java.lang.Override
+  public boolean hasProduct() {
+    return product_ != null;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Required. The product to update/create.
+   * If the caller does not have permission to update the
+   * [Product][google.cloud.retail.v2.Product], regardless of whether or not it
+   * exists, a PERMISSION_DENIED error is returned.
+   * If the [Product][google.cloud.retail.v2.Product] to update does not exist,
+   * a NOT_FOUND error is returned.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.Product product = 1 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   *
+   * @return The product.
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.Product getProduct() {
+    return product_ == null ? com.google.cloud.retail.v2.Product.getDefaultInstance() : product_;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Required. The product to update/create.
+   * If the caller does not have permission to update the
+   * [Product][google.cloud.retail.v2.Product], regardless of whether or not it
+   * exists, a PERMISSION_DENIED error is returned.
+   * If the [Product][google.cloud.retail.v2.Product] to update does not exist,
+   * a NOT_FOUND error is returned.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.Product product = 1 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.ProductOrBuilder getProductOrBuilder() {
+    return getProduct();
+  }
+
+  public static final int UPDATE_MASK_FIELD_NUMBER = 2;
+  private com.google.protobuf.FieldMask updateMask_;
+  /**
+   *
+   *
+   * <pre>
+   * Indicates which fields in the provided
+   * [Product][google.cloud.retail.v2.Product] to update. The immutable and
+   * output only fields are NOT supported. If not set, all supported fields (the
+   * fields that are neither immutable nor output only) are updated.
+   * If an unsupported or unknown field is provided, an INVALID_ARGUMENT error
+   * is returned.
+   * </pre>
+   *
+   * <code>.google.protobuf.FieldMask update_mask = 2;</code>
+   *
+   * @return Whether the updateMask field is set.
+   */
+  @java.lang.Override
+  public boolean hasUpdateMask() {
+    return updateMask_ != null;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Indicates which fields in the provided
+   * [Product][google.cloud.retail.v2.Product] to update. The immutable and
+   * output only fields are NOT supported. If not set, all supported fields (the
+   * fields that are neither immutable nor output only) are updated.
+   * If an unsupported or unknown field is provided, an INVALID_ARGUMENT error
+   * is returned.
+   * </pre>
+   *
+   * <code>.google.protobuf.FieldMask update_mask = 2;</code>
+   *
+   * @return The updateMask.
+   */
+  @java.lang.Override
+  public com.google.protobuf.FieldMask getUpdateMask() {
+    return updateMask_ == null ? com.google.protobuf.FieldMask.getDefaultInstance() : updateMask_;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Indicates which fields in the provided
+   * [Product][google.cloud.retail.v2.Product] to update. The immutable and
+   * output only fields are NOT supported. If not set, all supported fields (the
+   * fields that are neither immutable nor output only) are updated.
+   * If an unsupported or unknown field is provided, an INVALID_ARGUMENT error
+   * is returned.
+   * </pre>
+   *
+   * <code>.google.protobuf.FieldMask update_mask = 2;</code>
+   */
+  @java.lang.Override
+  public com.google.protobuf.FieldMaskOrBuilder getUpdateMaskOrBuilder() {
+    return getUpdateMask();
+  }
+
+  private byte memoizedIsInitialized = -1;
+
+  @java.lang.Override
+  public final boolean isInitialized() {
+    byte isInitialized = memoizedIsInitialized;
+    if (isInitialized == 1) return true;
+    if (isInitialized == 0) return false;
+
+    memoizedIsInitialized = 1;
+    return true;
+  }
+
+  @java.lang.Override
+  public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
+    if (product_ != null) {
+      output.writeMessage(1, getProduct());
+    }
+    if (updateMask_ != null) {
+      output.writeMessage(2, getUpdateMask());
+    }
+    unknownFields.writeTo(output);
+  }
+
+  @java.lang.Override
+  public int getSerializedSize() {
+    int size = memoizedSize;
+    if (size != -1) return size;
+
+    size = 0;
+    if (product_ != null) {
+      size += com.google.protobuf.CodedOutputStream.computeMessageSize(1, getProduct());
+    }
+    if (updateMask_ != null) {
+      size += com.google.protobuf.CodedOutputStream.computeMessageSize(2, getUpdateMask());
+    }
+    size += unknownFields.getSerializedSize();
+    memoizedSize = size;
+    return size;
+  }
+
+  @java.lang.Override
+  public boolean equals(final java.lang.Object obj) {
+    if (obj == this) {
+      return true;
+    }
+    if (!(obj instanceof com.google.cloud.retail.v2.UpdateProductRequest)) {
+      return super.equals(obj);
+    }
+    com.google.cloud.retail.v2.UpdateProductRequest other =
+        (com.google.cloud.retail.v2.UpdateProductRequest) obj;
+
+    if (hasProduct() != other.hasProduct()) return false;
+    if (hasProduct()) {
+      if (!getProduct().equals(other.getProduct())) return false;
+    }
+    if (hasUpdateMask() != other.hasUpdateMask()) return false;
+    if (hasUpdateMask()) {
+      if (!getUpdateMask().equals(other.getUpdateMask())) return false;
+    }
+    if (!unknownFields.equals(other.unknownFields)) return false;
+    return true;
+  }
+
+  @java.lang.Override
+  public int hashCode() {
+    if (memoizedHashCode != 0) {
+      return memoizedHashCode;
+    }
+    int hash = 41;
+    hash = (19 * hash) + getDescriptor().hashCode();
+    if (hasProduct()) {
+      hash = (37 * hash) + PRODUCT_FIELD_NUMBER;
+      hash = (53 * hash) + getProduct().hashCode();
+    }
+    if (hasUpdateMask()) {
+      hash = (37 * hash) + UPDATE_MASK_FIELD_NUMBER;
+      hash = (53 * hash) + getUpdateMask().hashCode();
+    }
+    hash = (29 * hash) + unknownFields.hashCode();
+    memoizedHashCode = hash;
+    return hash;
+  }
+
+  public static com.google.cloud.retail.v2.UpdateProductRequest parseFrom(java.nio.ByteBuffer data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.UpdateProductRequest parseFrom(
+      java.nio.ByteBuffer data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.UpdateProductRequest parseFrom(
+      com.google.protobuf.ByteString data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.UpdateProductRequest parseFrom(
+      com.google.protobuf.ByteString data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.UpdateProductRequest parseFrom(byte[] data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.UpdateProductRequest parseFrom(
+      byte[] data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.UpdateProductRequest parseFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.UpdateProductRequest parseFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.UpdateProductRequest parseDelimitedFrom(
+      java.io.InputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.UpdateProductRequest parseDelimitedFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.UpdateProductRequest parseFrom(
+      com.google.protobuf.CodedInputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.UpdateProductRequest parseFrom(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  @java.lang.Override
+  public Builder newBuilderForType() {
+    return newBuilder();
+  }
+
+  public static Builder newBuilder() {
+    return DEFAULT_INSTANCE.toBuilder();
+  }
+
+  public static Builder newBuilder(com.google.cloud.retail.v2.UpdateProductRequest prototype) {
+    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+  }
+
+  @java.lang.Override
+  public Builder toBuilder() {
+    return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
+  }
+
+  @java.lang.Override
+  protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+    Builder builder = new Builder(parent);
+    return builder;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Request message for [UpdateProduct][] method.
+   * </pre>
+   *
+   * Protobuf type {@code google.cloud.retail.v2.UpdateProductRequest}
+   */
+  public static final class Builder extends com.google.protobuf.GeneratedMessageV3.Builder<Builder>
+      implements
+      // @@protoc_insertion_point(builder_implements:google.cloud.retail.v2.UpdateProductRequest)
+      com.google.cloud.retail.v2.UpdateProductRequestOrBuilder {
+    public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+      return com.google.cloud.retail.v2.ProductServiceProto
+          .internal_static_google_cloud_retail_v2_UpdateProductRequest_descriptor;
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return com.google.cloud.retail.v2.ProductServiceProto
+          .internal_static_google_cloud_retail_v2_UpdateProductRequest_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              com.google.cloud.retail.v2.UpdateProductRequest.class,
+              com.google.cloud.retail.v2.UpdateProductRequest.Builder.class);
+    }
+
+    // Construct using com.google.cloud.retail.v2.UpdateProductRequest.newBuilder()
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
+
+    private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+      super(parent);
+      maybeForceBuilderInitialization();
+    }
+
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders) {}
+    }
+
+    @java.lang.Override
+    public Builder clear() {
+      super.clear();
+      if (productBuilder_ == null) {
+        product_ = null;
+      } else {
+        product_ = null;
+        productBuilder_ = null;
+      }
+      if (updateMaskBuilder_ == null) {
+        updateMask_ = null;
+      } else {
+        updateMask_ = null;
+        updateMaskBuilder_ = null;
+      }
+      return this;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
+      return com.google.cloud.retail.v2.ProductServiceProto
+          .internal_static_google_cloud_retail_v2_UpdateProductRequest_descriptor;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.UpdateProductRequest getDefaultInstanceForType() {
+      return com.google.cloud.retail.v2.UpdateProductRequest.getDefaultInstance();
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.UpdateProductRequest build() {
+      com.google.cloud.retail.v2.UpdateProductRequest result = buildPartial();
+      if (!result.isInitialized()) {
+        throw newUninitializedMessageException(result);
+      }
+      return result;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.UpdateProductRequest buildPartial() {
+      com.google.cloud.retail.v2.UpdateProductRequest result =
+          new com.google.cloud.retail.v2.UpdateProductRequest(this);
+      if (productBuilder_ == null) {
+        result.product_ = product_;
+      } else {
+        result.product_ = productBuilder_.build();
+      }
+      if (updateMaskBuilder_ == null) {
+        result.updateMask_ = updateMask_;
+      } else {
+        result.updateMask_ = updateMaskBuilder_.build();
+      }
+      onBuilt();
+      return result;
+    }
+
+    @java.lang.Override
+    public Builder clone() {
+      return super.clone();
+    }
+
+    @java.lang.Override
+    public Builder setField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.setField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
+      return super.clearField(field);
+    }
+
+    @java.lang.Override
+    public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+      return super.clearOneof(oneof);
+    }
+
+    @java.lang.Override
+    public Builder setRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, int index, java.lang.Object value) {
+      return super.setRepeatedField(field, index, value);
+    }
+
+    @java.lang.Override
+    public Builder addRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.addRepeatedField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(com.google.protobuf.Message other) {
+      if (other instanceof com.google.cloud.retail.v2.UpdateProductRequest) {
+        return mergeFrom((com.google.cloud.retail.v2.UpdateProductRequest) other);
+      } else {
+        super.mergeFrom(other);
+        return this;
+      }
+    }
+
+    public Builder mergeFrom(com.google.cloud.retail.v2.UpdateProductRequest other) {
+      if (other == com.google.cloud.retail.v2.UpdateProductRequest.getDefaultInstance())
+        return this;
+      if (other.hasProduct()) {
+        mergeProduct(other.getProduct());
+      }
+      if (other.hasUpdateMask()) {
+        mergeUpdateMask(other.getUpdateMask());
+      }
+      this.mergeUnknownFields(other.unknownFields);
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final boolean isInitialized() {
+      return true;
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      com.google.cloud.retail.v2.UpdateProductRequest parsedMessage = null;
+      try {
+        parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        parsedMessage = (com.google.cloud.retail.v2.UpdateProductRequest) e.getUnfinishedMessage();
+        throw e.unwrapIOException();
+      } finally {
+        if (parsedMessage != null) {
+          mergeFrom(parsedMessage);
+        }
+      }
+      return this;
+    }
+
+    private com.google.cloud.retail.v2.Product product_;
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.cloud.retail.v2.Product,
+            com.google.cloud.retail.v2.Product.Builder,
+            com.google.cloud.retail.v2.ProductOrBuilder>
+        productBuilder_;
+    /**
+     *
+     *
+     * <pre>
+     * Required. The product to update/create.
+     * If the caller does not have permission to update the
+     * [Product][google.cloud.retail.v2.Product], regardless of whether or not it
+     * exists, a PERMISSION_DENIED error is returned.
+     * If the [Product][google.cloud.retail.v2.Product] to update does not exist,
+     * a NOT_FOUND error is returned.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.Product product = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     *
+     * @return Whether the product field is set.
+     */
+    public boolean hasProduct() {
+      return productBuilder_ != null || product_ != null;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The product to update/create.
+     * If the caller does not have permission to update the
+     * [Product][google.cloud.retail.v2.Product], regardless of whether or not it
+     * exists, a PERMISSION_DENIED error is returned.
+     * If the [Product][google.cloud.retail.v2.Product] to update does not exist,
+     * a NOT_FOUND error is returned.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.Product product = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     *
+     * @return The product.
+     */
+    public com.google.cloud.retail.v2.Product getProduct() {
+      if (productBuilder_ == null) {
+        return product_ == null
+            ? com.google.cloud.retail.v2.Product.getDefaultInstance()
+            : product_;
+      } else {
+        return productBuilder_.getMessage();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The product to update/create.
+     * If the caller does not have permission to update the
+     * [Product][google.cloud.retail.v2.Product], regardless of whether or not it
+     * exists, a PERMISSION_DENIED error is returned.
+     * If the [Product][google.cloud.retail.v2.Product] to update does not exist,
+     * a NOT_FOUND error is returned.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.Product product = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder setProduct(com.google.cloud.retail.v2.Product value) {
+      if (productBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        product_ = value;
+        onChanged();
+      } else {
+        productBuilder_.setMessage(value);
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The product to update/create.
+     * If the caller does not have permission to update the
+     * [Product][google.cloud.retail.v2.Product], regardless of whether or not it
+     * exists, a PERMISSION_DENIED error is returned.
+     * If the [Product][google.cloud.retail.v2.Product] to update does not exist,
+     * a NOT_FOUND error is returned.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.Product product = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder setProduct(com.google.cloud.retail.v2.Product.Builder builderForValue) {
+      if (productBuilder_ == null) {
+        product_ = builderForValue.build();
+        onChanged();
+      } else {
+        productBuilder_.setMessage(builderForValue.build());
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The product to update/create.
+     * If the caller does not have permission to update the
+     * [Product][google.cloud.retail.v2.Product], regardless of whether or not it
+     * exists, a PERMISSION_DENIED error is returned.
+     * If the [Product][google.cloud.retail.v2.Product] to update does not exist,
+     * a NOT_FOUND error is returned.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.Product product = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder mergeProduct(com.google.cloud.retail.v2.Product value) {
+      if (productBuilder_ == null) {
+        if (product_ != null) {
+          product_ =
+              com.google.cloud.retail.v2.Product.newBuilder(product_)
+                  .mergeFrom(value)
+                  .buildPartial();
+        } else {
+          product_ = value;
+        }
+        onChanged();
+      } else {
+        productBuilder_.mergeFrom(value);
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The product to update/create.
+     * If the caller does not have permission to update the
+     * [Product][google.cloud.retail.v2.Product], regardless of whether or not it
+     * exists, a PERMISSION_DENIED error is returned.
+     * If the [Product][google.cloud.retail.v2.Product] to update does not exist,
+     * a NOT_FOUND error is returned.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.Product product = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder clearProduct() {
+      if (productBuilder_ == null) {
+        product_ = null;
+        onChanged();
+      } else {
+        product_ = null;
+        productBuilder_ = null;
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The product to update/create.
+     * If the caller does not have permission to update the
+     * [Product][google.cloud.retail.v2.Product], regardless of whether or not it
+     * exists, a PERMISSION_DENIED error is returned.
+     * If the [Product][google.cloud.retail.v2.Product] to update does not exist,
+     * a NOT_FOUND error is returned.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.Product product = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public com.google.cloud.retail.v2.Product.Builder getProductBuilder() {
+
+      onChanged();
+      return getProductFieldBuilder().getBuilder();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The product to update/create.
+     * If the caller does not have permission to update the
+     * [Product][google.cloud.retail.v2.Product], regardless of whether or not it
+     * exists, a PERMISSION_DENIED error is returned.
+     * If the [Product][google.cloud.retail.v2.Product] to update does not exist,
+     * a NOT_FOUND error is returned.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.Product product = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public com.google.cloud.retail.v2.ProductOrBuilder getProductOrBuilder() {
+      if (productBuilder_ != null) {
+        return productBuilder_.getMessageOrBuilder();
+      } else {
+        return product_ == null
+            ? com.google.cloud.retail.v2.Product.getDefaultInstance()
+            : product_;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The product to update/create.
+     * If the caller does not have permission to update the
+     * [Product][google.cloud.retail.v2.Product], regardless of whether or not it
+     * exists, a PERMISSION_DENIED error is returned.
+     * If the [Product][google.cloud.retail.v2.Product] to update does not exist,
+     * a NOT_FOUND error is returned.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.Product product = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.cloud.retail.v2.Product,
+            com.google.cloud.retail.v2.Product.Builder,
+            com.google.cloud.retail.v2.ProductOrBuilder>
+        getProductFieldBuilder() {
+      if (productBuilder_ == null) {
+        productBuilder_ =
+            new com.google.protobuf.SingleFieldBuilderV3<
+                com.google.cloud.retail.v2.Product,
+                com.google.cloud.retail.v2.Product.Builder,
+                com.google.cloud.retail.v2.ProductOrBuilder>(
+                getProduct(), getParentForChildren(), isClean());
+        product_ = null;
+      }
+      return productBuilder_;
+    }
+
+    private com.google.protobuf.FieldMask updateMask_;
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.protobuf.FieldMask,
+            com.google.protobuf.FieldMask.Builder,
+            com.google.protobuf.FieldMaskOrBuilder>
+        updateMaskBuilder_;
+    /**
+     *
+     *
+     * <pre>
+     * Indicates which fields in the provided
+     * [Product][google.cloud.retail.v2.Product] to update. The immutable and
+     * output only fields are NOT supported. If not set, all supported fields (the
+     * fields that are neither immutable nor output only) are updated.
+     * If an unsupported or unknown field is provided, an INVALID_ARGUMENT error
+     * is returned.
+     * </pre>
+     *
+     * <code>.google.protobuf.FieldMask update_mask = 2;</code>
+     *
+     * @return Whether the updateMask field is set.
+     */
+    public boolean hasUpdateMask() {
+      return updateMaskBuilder_ != null || updateMask_ != null;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Indicates which fields in the provided
+     * [Product][google.cloud.retail.v2.Product] to update. The immutable and
+     * output only fields are NOT supported. If not set, all supported fields (the
+     * fields that are neither immutable nor output only) are updated.
+     * If an unsupported or unknown field is provided, an INVALID_ARGUMENT error
+     * is returned.
+     * </pre>
+     *
+     * <code>.google.protobuf.FieldMask update_mask = 2;</code>
+     *
+     * @return The updateMask.
+     */
+    public com.google.protobuf.FieldMask getUpdateMask() {
+      if (updateMaskBuilder_ == null) {
+        return updateMask_ == null
+            ? com.google.protobuf.FieldMask.getDefaultInstance()
+            : updateMask_;
+      } else {
+        return updateMaskBuilder_.getMessage();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Indicates which fields in the provided
+     * [Product][google.cloud.retail.v2.Product] to update. The immutable and
+     * output only fields are NOT supported. If not set, all supported fields (the
+     * fields that are neither immutable nor output only) are updated.
+     * If an unsupported or unknown field is provided, an INVALID_ARGUMENT error
+     * is returned.
+     * </pre>
+     *
+     * <code>.google.protobuf.FieldMask update_mask = 2;</code>
+     */
+    public Builder setUpdateMask(com.google.protobuf.FieldMask value) {
+      if (updateMaskBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        updateMask_ = value;
+        onChanged();
+      } else {
+        updateMaskBuilder_.setMessage(value);
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Indicates which fields in the provided
+     * [Product][google.cloud.retail.v2.Product] to update. The immutable and
+     * output only fields are NOT supported. If not set, all supported fields (the
+     * fields that are neither immutable nor output only) are updated.
+     * If an unsupported or unknown field is provided, an INVALID_ARGUMENT error
+     * is returned.
+     * </pre>
+     *
+     * <code>.google.protobuf.FieldMask update_mask = 2;</code>
+     */
+    public Builder setUpdateMask(com.google.protobuf.FieldMask.Builder builderForValue) {
+      if (updateMaskBuilder_ == null) {
+        updateMask_ = builderForValue.build();
+        onChanged();
+      } else {
+        updateMaskBuilder_.setMessage(builderForValue.build());
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Indicates which fields in the provided
+     * [Product][google.cloud.retail.v2.Product] to update. The immutable and
+     * output only fields are NOT supported. If not set, all supported fields (the
+     * fields that are neither immutable nor output only) are updated.
+     * If an unsupported or unknown field is provided, an INVALID_ARGUMENT error
+     * is returned.
+     * </pre>
+     *
+     * <code>.google.protobuf.FieldMask update_mask = 2;</code>
+     */
+    public Builder mergeUpdateMask(com.google.protobuf.FieldMask value) {
+      if (updateMaskBuilder_ == null) {
+        if (updateMask_ != null) {
+          updateMask_ =
+              com.google.protobuf.FieldMask.newBuilder(updateMask_).mergeFrom(value).buildPartial();
+        } else {
+          updateMask_ = value;
+        }
+        onChanged();
+      } else {
+        updateMaskBuilder_.mergeFrom(value);
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Indicates which fields in the provided
+     * [Product][google.cloud.retail.v2.Product] to update. The immutable and
+     * output only fields are NOT supported. If not set, all supported fields (the
+     * fields that are neither immutable nor output only) are updated.
+     * If an unsupported or unknown field is provided, an INVALID_ARGUMENT error
+     * is returned.
+     * </pre>
+     *
+     * <code>.google.protobuf.FieldMask update_mask = 2;</code>
+     */
+    public Builder clearUpdateMask() {
+      if (updateMaskBuilder_ == null) {
+        updateMask_ = null;
+        onChanged();
+      } else {
+        updateMask_ = null;
+        updateMaskBuilder_ = null;
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Indicates which fields in the provided
+     * [Product][google.cloud.retail.v2.Product] to update. The immutable and
+     * output only fields are NOT supported. If not set, all supported fields (the
+     * fields that are neither immutable nor output only) are updated.
+     * If an unsupported or unknown field is provided, an INVALID_ARGUMENT error
+     * is returned.
+     * </pre>
+     *
+     * <code>.google.protobuf.FieldMask update_mask = 2;</code>
+     */
+    public com.google.protobuf.FieldMask.Builder getUpdateMaskBuilder() {
+
+      onChanged();
+      return getUpdateMaskFieldBuilder().getBuilder();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Indicates which fields in the provided
+     * [Product][google.cloud.retail.v2.Product] to update. The immutable and
+     * output only fields are NOT supported. If not set, all supported fields (the
+     * fields that are neither immutable nor output only) are updated.
+     * If an unsupported or unknown field is provided, an INVALID_ARGUMENT error
+     * is returned.
+     * </pre>
+     *
+     * <code>.google.protobuf.FieldMask update_mask = 2;</code>
+     */
+    public com.google.protobuf.FieldMaskOrBuilder getUpdateMaskOrBuilder() {
+      if (updateMaskBuilder_ != null) {
+        return updateMaskBuilder_.getMessageOrBuilder();
+      } else {
+        return updateMask_ == null
+            ? com.google.protobuf.FieldMask.getDefaultInstance()
+            : updateMask_;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Indicates which fields in the provided
+     * [Product][google.cloud.retail.v2.Product] to update. The immutable and
+     * output only fields are NOT supported. If not set, all supported fields (the
+     * fields that are neither immutable nor output only) are updated.
+     * If an unsupported or unknown field is provided, an INVALID_ARGUMENT error
+     * is returned.
+     * </pre>
+     *
+     * <code>.google.protobuf.FieldMask update_mask = 2;</code>
+     */
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.protobuf.FieldMask,
+            com.google.protobuf.FieldMask.Builder,
+            com.google.protobuf.FieldMaskOrBuilder>
+        getUpdateMaskFieldBuilder() {
+      if (updateMaskBuilder_ == null) {
+        updateMaskBuilder_ =
+            new com.google.protobuf.SingleFieldBuilderV3<
+                com.google.protobuf.FieldMask,
+                com.google.protobuf.FieldMask.Builder,
+                com.google.protobuf.FieldMaskOrBuilder>(
+                getUpdateMask(), getParentForChildren(), isClean());
+        updateMask_ = null;
+      }
+      return updateMaskBuilder_;
+    }
+
+    @java.lang.Override
+    public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.setUnknownFields(unknownFields);
+    }
+
+    @java.lang.Override
+    public final Builder mergeUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.mergeUnknownFields(unknownFields);
+    }
+
+    // @@protoc_insertion_point(builder_scope:google.cloud.retail.v2.UpdateProductRequest)
+  }
+
+  // @@protoc_insertion_point(class_scope:google.cloud.retail.v2.UpdateProductRequest)
+  private static final com.google.cloud.retail.v2.UpdateProductRequest DEFAULT_INSTANCE;
+
+  static {
+    DEFAULT_INSTANCE = new com.google.cloud.retail.v2.UpdateProductRequest();
+  }
+
+  public static com.google.cloud.retail.v2.UpdateProductRequest getDefaultInstance() {
+    return DEFAULT_INSTANCE;
+  }
+
+  private static final com.google.protobuf.Parser<UpdateProductRequest> PARSER =
+      new com.google.protobuf.AbstractParser<UpdateProductRequest>() {
+        @java.lang.Override
+        public UpdateProductRequest parsePartialFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws com.google.protobuf.InvalidProtocolBufferException {
+          return new UpdateProductRequest(input, extensionRegistry);
+        }
+      };
+
+  public static com.google.protobuf.Parser<UpdateProductRequest> parser() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.protobuf.Parser<UpdateProductRequest> getParserForType() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.cloud.retail.v2.UpdateProductRequest getDefaultInstanceForType() {
+    return DEFAULT_INSTANCE;
+  }
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/UpdateProductRequestOrBuilder.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/UpdateProductRequestOrBuilder.java
new file mode 100644
index 00000000..9038e133
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/UpdateProductRequestOrBuilder.java
@@ -0,0 +1,128 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/product_service.proto
+
+package com.google.cloud.retail.v2;
+
+public interface UpdateProductRequestOrBuilder
+    extends
+    // @@protoc_insertion_point(interface_extends:google.cloud.retail.v2.UpdateProductRequest)
+    com.google.protobuf.MessageOrBuilder {
+
+  /**
+   *
+   *
+   * <pre>
+   * Required. The product to update/create.
+   * If the caller does not have permission to update the
+   * [Product][google.cloud.retail.v2.Product], regardless of whether or not it
+   * exists, a PERMISSION_DENIED error is returned.
+   * If the [Product][google.cloud.retail.v2.Product] to update does not exist,
+   * a NOT_FOUND error is returned.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.Product product = 1 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   *
+   * @return Whether the product field is set.
+   */
+  boolean hasProduct();
+  /**
+   *
+   *
+   * <pre>
+   * Required. The product to update/create.
+   * If the caller does not have permission to update the
+   * [Product][google.cloud.retail.v2.Product], regardless of whether or not it
+   * exists, a PERMISSION_DENIED error is returned.
+   * If the [Product][google.cloud.retail.v2.Product] to update does not exist,
+   * a NOT_FOUND error is returned.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.Product product = 1 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   *
+   * @return The product.
+   */
+  com.google.cloud.retail.v2.Product getProduct();
+  /**
+   *
+   *
+   * <pre>
+   * Required. The product to update/create.
+   * If the caller does not have permission to update the
+   * [Product][google.cloud.retail.v2.Product], regardless of whether or not it
+   * exists, a PERMISSION_DENIED error is returned.
+   * If the [Product][google.cloud.retail.v2.Product] to update does not exist,
+   * a NOT_FOUND error is returned.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.Product product = 1 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   */
+  com.google.cloud.retail.v2.ProductOrBuilder getProductOrBuilder();
+
+  /**
+   *
+   *
+   * <pre>
+   * Indicates which fields in the provided
+   * [Product][google.cloud.retail.v2.Product] to update. The immutable and
+   * output only fields are NOT supported. If not set, all supported fields (the
+   * fields that are neither immutable nor output only) are updated.
+   * If an unsupported or unknown field is provided, an INVALID_ARGUMENT error
+   * is returned.
+   * </pre>
+   *
+   * <code>.google.protobuf.FieldMask update_mask = 2;</code>
+   *
+   * @return Whether the updateMask field is set.
+   */
+  boolean hasUpdateMask();
+  /**
+   *
+   *
+   * <pre>
+   * Indicates which fields in the provided
+   * [Product][google.cloud.retail.v2.Product] to update. The immutable and
+   * output only fields are NOT supported. If not set, all supported fields (the
+   * fields that are neither immutable nor output only) are updated.
+   * If an unsupported or unknown field is provided, an INVALID_ARGUMENT error
+   * is returned.
+   * </pre>
+   *
+   * <code>.google.protobuf.FieldMask update_mask = 2;</code>
+   *
+   * @return The updateMask.
+   */
+  com.google.protobuf.FieldMask getUpdateMask();
+  /**
+   *
+   *
+   * <pre>
+   * Indicates which fields in the provided
+   * [Product][google.cloud.retail.v2.Product] to update. The immutable and
+   * output only fields are NOT supported. If not set, all supported fields (the
+   * fields that are neither immutable nor output only) are updated.
+   * If an unsupported or unknown field is provided, an INVALID_ARGUMENT error
+   * is returned.
+   * </pre>
+   *
+   * <code>.google.protobuf.FieldMask update_mask = 2;</code>
+   */
+  com.google.protobuf.FieldMaskOrBuilder getUpdateMaskOrBuilder();
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/UserEvent.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/UserEvent.java
new file mode 100644
index 00000000..d2f4dcbe
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/UserEvent.java
@@ -0,0 +1,4953 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/user_event.proto
+
+package com.google.cloud.retail.v2;
+
+/**
+ *
+ *
+ * <pre>
+ * UserEvent captures all metadata information Retail API needs to know about
+ * how end users interact with customers' website.
+ * </pre>
+ *
+ * Protobuf type {@code google.cloud.retail.v2.UserEvent}
+ */
+public final class UserEvent extends com.google.protobuf.GeneratedMessageV3
+    implements
+    // @@protoc_insertion_point(message_implements:google.cloud.retail.v2.UserEvent)
+    UserEventOrBuilder {
+  private static final long serialVersionUID = 0L;
+  // Use UserEvent.newBuilder() to construct.
+  private UserEvent(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+    super(builder);
+  }
+
+  private UserEvent() {
+    eventType_ = "";
+    visitorId_ = "";
+    experimentIds_ = com.google.protobuf.LazyStringArrayList.EMPTY;
+    attributionToken_ = "";
+    productDetails_ = java.util.Collections.emptyList();
+    cartId_ = "";
+    searchQuery_ = "";
+    pageCategories_ = com.google.protobuf.LazyStringArrayList.EMPTY;
+    uri_ = "";
+    referrerUri_ = "";
+    pageViewId_ = "";
+  }
+
+  @java.lang.Override
+  @SuppressWarnings({"unused"})
+  protected java.lang.Object newInstance(UnusedPrivateParameter unused) {
+    return new UserEvent();
+  }
+
+  @java.lang.Override
+  public final com.google.protobuf.UnknownFieldSet getUnknownFields() {
+    return this.unknownFields;
+  }
+
+  private UserEvent(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    this();
+    if (extensionRegistry == null) {
+      throw new java.lang.NullPointerException();
+    }
+    int mutable_bitField0_ = 0;
+    com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+        com.google.protobuf.UnknownFieldSet.newBuilder();
+    try {
+      boolean done = false;
+      while (!done) {
+        int tag = input.readTag();
+        switch (tag) {
+          case 0:
+            done = true;
+            break;
+          case 10:
+            {
+              java.lang.String s = input.readStringRequireUtf8();
+
+              eventType_ = s;
+              break;
+            }
+          case 18:
+            {
+              java.lang.String s = input.readStringRequireUtf8();
+
+              visitorId_ = s;
+              break;
+            }
+          case 26:
+            {
+              com.google.protobuf.Timestamp.Builder subBuilder = null;
+              if (eventTime_ != null) {
+                subBuilder = eventTime_.toBuilder();
+              }
+              eventTime_ =
+                  input.readMessage(com.google.protobuf.Timestamp.parser(), extensionRegistry);
+              if (subBuilder != null) {
+                subBuilder.mergeFrom(eventTime_);
+                eventTime_ = subBuilder.buildPartial();
+              }
+
+              break;
+            }
+          case 34:
+            {
+              java.lang.String s = input.readStringRequireUtf8();
+              if (!((mutable_bitField0_ & 0x00000001) != 0)) {
+                experimentIds_ = new com.google.protobuf.LazyStringArrayList();
+                mutable_bitField0_ |= 0x00000001;
+              }
+              experimentIds_.add(s);
+              break;
+            }
+          case 42:
+            {
+              java.lang.String s = input.readStringRequireUtf8();
+
+              attributionToken_ = s;
+              break;
+            }
+          case 50:
+            {
+              if (!((mutable_bitField0_ & 0x00000002) != 0)) {
+                productDetails_ =
+                    new java.util.ArrayList<com.google.cloud.retail.v2.ProductDetail>();
+                mutable_bitField0_ |= 0x00000002;
+              }
+              productDetails_.add(
+                  input.readMessage(
+                      com.google.cloud.retail.v2.ProductDetail.parser(), extensionRegistry));
+              break;
+            }
+          case 58:
+            {
+              if (!((mutable_bitField0_ & 0x00000004) != 0)) {
+                attributes_ =
+                    com.google.protobuf.MapField.newMapField(
+                        AttributesDefaultEntryHolder.defaultEntry);
+                mutable_bitField0_ |= 0x00000004;
+              }
+              com.google.protobuf.MapEntry<
+                      java.lang.String, com.google.cloud.retail.v2.CustomAttribute>
+                  attributes__ =
+                      input.readMessage(
+                          AttributesDefaultEntryHolder.defaultEntry.getParserForType(),
+                          extensionRegistry);
+              attributes_.getMutableMap().put(attributes__.getKey(), attributes__.getValue());
+              break;
+            }
+          case 66:
+            {
+              java.lang.String s = input.readStringRequireUtf8();
+
+              cartId_ = s;
+              break;
+            }
+          case 74:
+            {
+              com.google.cloud.retail.v2.PurchaseTransaction.Builder subBuilder = null;
+              if (purchaseTransaction_ != null) {
+                subBuilder = purchaseTransaction_.toBuilder();
+              }
+              purchaseTransaction_ =
+                  input.readMessage(
+                      com.google.cloud.retail.v2.PurchaseTransaction.parser(), extensionRegistry);
+              if (subBuilder != null) {
+                subBuilder.mergeFrom(purchaseTransaction_);
+                purchaseTransaction_ = subBuilder.buildPartial();
+              }
+
+              break;
+            }
+          case 82:
+            {
+              java.lang.String s = input.readStringRequireUtf8();
+
+              searchQuery_ = s;
+              break;
+            }
+          case 90:
+            {
+              java.lang.String s = input.readStringRequireUtf8();
+              if (!((mutable_bitField0_ & 0x00000008) != 0)) {
+                pageCategories_ = new com.google.protobuf.LazyStringArrayList();
+                mutable_bitField0_ |= 0x00000008;
+              }
+              pageCategories_.add(s);
+              break;
+            }
+          case 98:
+            {
+              com.google.cloud.retail.v2.UserInfo.Builder subBuilder = null;
+              if (userInfo_ != null) {
+                subBuilder = userInfo_.toBuilder();
+              }
+              userInfo_ =
+                  input.readMessage(
+                      com.google.cloud.retail.v2.UserInfo.parser(), extensionRegistry);
+              if (subBuilder != null) {
+                subBuilder.mergeFrom(userInfo_);
+                userInfo_ = subBuilder.buildPartial();
+              }
+
+              break;
+            }
+          case 106:
+            {
+              java.lang.String s = input.readStringRequireUtf8();
+
+              uri_ = s;
+              break;
+            }
+          case 114:
+            {
+              java.lang.String s = input.readStringRequireUtf8();
+
+              referrerUri_ = s;
+              break;
+            }
+          case 122:
+            {
+              java.lang.String s = input.readStringRequireUtf8();
+
+              pageViewId_ = s;
+              break;
+            }
+          default:
+            {
+              if (!parseUnknownField(input, unknownFields, extensionRegistry, tag)) {
+                done = true;
+              }
+              break;
+            }
+        }
+      }
+    } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+      throw e.setUnfinishedMessage(this);
+    } catch (java.io.IOException e) {
+      throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
+    } finally {
+      if (((mutable_bitField0_ & 0x00000001) != 0)) {
+        experimentIds_ = experimentIds_.getUnmodifiableView();
+      }
+      if (((mutable_bitField0_ & 0x00000002) != 0)) {
+        productDetails_ = java.util.Collections.unmodifiableList(productDetails_);
+      }
+      if (((mutable_bitField0_ & 0x00000008) != 0)) {
+        pageCategories_ = pageCategories_.getUnmodifiableView();
+      }
+      this.unknownFields = unknownFields.build();
+      makeExtensionsImmutable();
+    }
+  }
+
+  public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+    return com.google.cloud.retail.v2.UserEventProto
+        .internal_static_google_cloud_retail_v2_UserEvent_descriptor;
+  }
+
+  @SuppressWarnings({"rawtypes"})
+  @java.lang.Override
+  protected com.google.protobuf.MapField internalGetMapField(int number) {
+    switch (number) {
+      case 7:
+        return internalGetAttributes();
+      default:
+        throw new RuntimeException("Invalid map field number: " + number);
+    }
+  }
+
+  @java.lang.Override
+  protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internalGetFieldAccessorTable() {
+    return com.google.cloud.retail.v2.UserEventProto
+        .internal_static_google_cloud_retail_v2_UserEvent_fieldAccessorTable
+        .ensureFieldAccessorsInitialized(
+            com.google.cloud.retail.v2.UserEvent.class,
+            com.google.cloud.retail.v2.UserEvent.Builder.class);
+  }
+
+  public static final int EVENT_TYPE_FIELD_NUMBER = 1;
+  private volatile java.lang.Object eventType_;
+  /**
+   *
+   *
+   * <pre>
+   * Required. User event type. Allowed values are:
+   * * `add-to-cart`: Products being added to cart.
+   * * `category-page-view`: Special pages such as sale or promotion pages
+   *   viewed.
+   * * `detail-page-view`: Products detail page viewed.
+   * * `home-page-view`: Homepage viewed.
+   * * `purchase-complete`: User finishing a purchase.
+   * * `search`: Product search.
+   * * `shopping-cart-page-view`: User viewing a shopping cart.
+   * </pre>
+   *
+   * <code>string event_type = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The eventType.
+   */
+  @java.lang.Override
+  public java.lang.String getEventType() {
+    java.lang.Object ref = eventType_;
+    if (ref instanceof java.lang.String) {
+      return (java.lang.String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+      java.lang.String s = bs.toStringUtf8();
+      eventType_ = s;
+      return s;
+    }
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Required. User event type. Allowed values are:
+   * * `add-to-cart`: Products being added to cart.
+   * * `category-page-view`: Special pages such as sale or promotion pages
+   *   viewed.
+   * * `detail-page-view`: Products detail page viewed.
+   * * `home-page-view`: Homepage viewed.
+   * * `purchase-complete`: User finishing a purchase.
+   * * `search`: Product search.
+   * * `shopping-cart-page-view`: User viewing a shopping cart.
+   * </pre>
+   *
+   * <code>string event_type = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The bytes for eventType.
+   */
+  @java.lang.Override
+  public com.google.protobuf.ByteString getEventTypeBytes() {
+    java.lang.Object ref = eventType_;
+    if (ref instanceof java.lang.String) {
+      com.google.protobuf.ByteString b =
+          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+      eventType_ = b;
+      return b;
+    } else {
+      return (com.google.protobuf.ByteString) ref;
+    }
+  }
+
+  public static final int VISITOR_ID_FIELD_NUMBER = 2;
+  private volatile java.lang.Object visitorId_;
+  /**
+   *
+   *
+   * <pre>
+   * Required. A unique identifier for tracking visitors.
+   * For example, this could be implemented with an HTTP cookie, which should be
+   * able to uniquely identify a visitor on a single device. This unique
+   * identifier should not change if the visitor log in/out of the website.
+   * The field must be a UTF-8 encoded string with a length limit of 128
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * </pre>
+   *
+   * <code>string visitor_id = 2 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The visitorId.
+   */
+  @java.lang.Override
+  public java.lang.String getVisitorId() {
+    java.lang.Object ref = visitorId_;
+    if (ref instanceof java.lang.String) {
+      return (java.lang.String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+      java.lang.String s = bs.toStringUtf8();
+      visitorId_ = s;
+      return s;
+    }
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Required. A unique identifier for tracking visitors.
+   * For example, this could be implemented with an HTTP cookie, which should be
+   * able to uniquely identify a visitor on a single device. This unique
+   * identifier should not change if the visitor log in/out of the website.
+   * The field must be a UTF-8 encoded string with a length limit of 128
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * </pre>
+   *
+   * <code>string visitor_id = 2 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The bytes for visitorId.
+   */
+  @java.lang.Override
+  public com.google.protobuf.ByteString getVisitorIdBytes() {
+    java.lang.Object ref = visitorId_;
+    if (ref instanceof java.lang.String) {
+      com.google.protobuf.ByteString b =
+          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+      visitorId_ = b;
+      return b;
+    } else {
+      return (com.google.protobuf.ByteString) ref;
+    }
+  }
+
+  public static final int EVENT_TIME_FIELD_NUMBER = 3;
+  private com.google.protobuf.Timestamp eventTime_;
+  /**
+   *
+   *
+   * <pre>
+   * Only required for
+   * [UserEventService.ImportUserEvents][google.cloud.retail.v2.UserEventService.ImportUserEvents]
+   * method. Timestamp of when the user event happened.
+   * </pre>
+   *
+   * <code>.google.protobuf.Timestamp event_time = 3;</code>
+   *
+   * @return Whether the eventTime field is set.
+   */
+  @java.lang.Override
+  public boolean hasEventTime() {
+    return eventTime_ != null;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Only required for
+   * [UserEventService.ImportUserEvents][google.cloud.retail.v2.UserEventService.ImportUserEvents]
+   * method. Timestamp of when the user event happened.
+   * </pre>
+   *
+   * <code>.google.protobuf.Timestamp event_time = 3;</code>
+   *
+   * @return The eventTime.
+   */
+  @java.lang.Override
+  public com.google.protobuf.Timestamp getEventTime() {
+    return eventTime_ == null ? com.google.protobuf.Timestamp.getDefaultInstance() : eventTime_;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Only required for
+   * [UserEventService.ImportUserEvents][google.cloud.retail.v2.UserEventService.ImportUserEvents]
+   * method. Timestamp of when the user event happened.
+   * </pre>
+   *
+   * <code>.google.protobuf.Timestamp event_time = 3;</code>
+   */
+  @java.lang.Override
+  public com.google.protobuf.TimestampOrBuilder getEventTimeOrBuilder() {
+    return getEventTime();
+  }
+
+  public static final int EXPERIMENT_IDS_FIELD_NUMBER = 4;
+  private com.google.protobuf.LazyStringList experimentIds_;
+  /**
+   *
+   *
+   * <pre>
+   * A list of identifiers for the independent experiment groups this user event
+   * belongs to. This is used to distinguish between user events associated with
+   * different experiment setups (e.g. using Retail API, using different
+   * recommendation models).
+   * </pre>
+   *
+   * <code>repeated string experiment_ids = 4;</code>
+   *
+   * @return A list containing the experimentIds.
+   */
+  public com.google.protobuf.ProtocolStringList getExperimentIdsList() {
+    return experimentIds_;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * A list of identifiers for the independent experiment groups this user event
+   * belongs to. This is used to distinguish between user events associated with
+   * different experiment setups (e.g. using Retail API, using different
+   * recommendation models).
+   * </pre>
+   *
+   * <code>repeated string experiment_ids = 4;</code>
+   *
+   * @return The count of experimentIds.
+   */
+  public int getExperimentIdsCount() {
+    return experimentIds_.size();
+  }
+  /**
+   *
+   *
+   * <pre>
+   * A list of identifiers for the independent experiment groups this user event
+   * belongs to. This is used to distinguish between user events associated with
+   * different experiment setups (e.g. using Retail API, using different
+   * recommendation models).
+   * </pre>
+   *
+   * <code>repeated string experiment_ids = 4;</code>
+   *
+   * @param index The index of the element to return.
+   * @return The experimentIds at the given index.
+   */
+  public java.lang.String getExperimentIds(int index) {
+    return experimentIds_.get(index);
+  }
+  /**
+   *
+   *
+   * <pre>
+   * A list of identifiers for the independent experiment groups this user event
+   * belongs to. This is used to distinguish between user events associated with
+   * different experiment setups (e.g. using Retail API, using different
+   * recommendation models).
+   * </pre>
+   *
+   * <code>repeated string experiment_ids = 4;</code>
+   *
+   * @param index The index of the value to return.
+   * @return The bytes of the experimentIds at the given index.
+   */
+  public com.google.protobuf.ByteString getExperimentIdsBytes(int index) {
+    return experimentIds_.getByteString(index);
+  }
+
+  public static final int ATTRIBUTION_TOKEN_FIELD_NUMBER = 5;
+  private volatile java.lang.Object attributionToken_;
+  /**
+   *
+   *
+   * <pre>
+   * Highly recommended for user events that are the result of
+   * [PredictionService.Predict][google.cloud.retail.v2.PredictionService.Predict].
+   * This field enables accurate attribution of recommendation model
+   * performance.
+   * The value must be a valid
+   * [PredictResponse.attribution_token][google.cloud.retail.v2.PredictResponse.attribution_token]
+   * for user events that are the result of
+   * [PredictionService.Predict][google.cloud.retail.v2.PredictionService.Predict].
+   * This token enables us to accurately attribute page view or purchase back to
+   * the event and the particular predict response containing this
+   * clicked/purchased product. If user clicks on product K in the
+   * recommendation results, pass
+   * [PredictResponse.attribution_token][google.cloud.retail.v2.PredictResponse.attribution_token]
+   * as a URL parameter to product K's page. When recording events on product
+   * K's page, log the
+   * [PredictResponse.attribution_token][google.cloud.retail.v2.PredictResponse.attribution_token]
+   * to this field.
+   * </pre>
+   *
+   * <code>string attribution_token = 5;</code>
+   *
+   * @return The attributionToken.
+   */
+  @java.lang.Override
+  public java.lang.String getAttributionToken() {
+    java.lang.Object ref = attributionToken_;
+    if (ref instanceof java.lang.String) {
+      return (java.lang.String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+      java.lang.String s = bs.toStringUtf8();
+      attributionToken_ = s;
+      return s;
+    }
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Highly recommended for user events that are the result of
+   * [PredictionService.Predict][google.cloud.retail.v2.PredictionService.Predict].
+   * This field enables accurate attribution of recommendation model
+   * performance.
+   * The value must be a valid
+   * [PredictResponse.attribution_token][google.cloud.retail.v2.PredictResponse.attribution_token]
+   * for user events that are the result of
+   * [PredictionService.Predict][google.cloud.retail.v2.PredictionService.Predict].
+   * This token enables us to accurately attribute page view or purchase back to
+   * the event and the particular predict response containing this
+   * clicked/purchased product. If user clicks on product K in the
+   * recommendation results, pass
+   * [PredictResponse.attribution_token][google.cloud.retail.v2.PredictResponse.attribution_token]
+   * as a URL parameter to product K's page. When recording events on product
+   * K's page, log the
+   * [PredictResponse.attribution_token][google.cloud.retail.v2.PredictResponse.attribution_token]
+   * to this field.
+   * </pre>
+   *
+   * <code>string attribution_token = 5;</code>
+   *
+   * @return The bytes for attributionToken.
+   */
+  @java.lang.Override
+  public com.google.protobuf.ByteString getAttributionTokenBytes() {
+    java.lang.Object ref = attributionToken_;
+    if (ref instanceof java.lang.String) {
+      com.google.protobuf.ByteString b =
+          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+      attributionToken_ = b;
+      return b;
+    } else {
+      return (com.google.protobuf.ByteString) ref;
+    }
+  }
+
+  public static final int PRODUCT_DETAILS_FIELD_NUMBER = 6;
+  private java.util.List<com.google.cloud.retail.v2.ProductDetail> productDetails_;
+  /**
+   *
+   *
+   * <pre>
+   * The main product details related to the event.
+   * This field is required for the following event types:
+   * * `add-to-cart`
+   * * `detail-page-view`
+   * * `purchase-complete`
+   * In a `search` event, this field represents the products returned to the end
+   * user on the current page (the end user may have not finished broswing the
+   * whole page yet). When a new page is returned to the end user, after
+   * pagination/filtering/ordering even for the same query, a new `search` event
+   * with different
+   * [product_details][google.cloud.retail.v2.UserEvent.product_details] is
+   * desired. The end user may have not finished broswing the whole page yet.
+   * </pre>
+   *
+   * <code>repeated .google.cloud.retail.v2.ProductDetail product_details = 6;</code>
+   */
+  @java.lang.Override
+  public java.util.List<com.google.cloud.retail.v2.ProductDetail> getProductDetailsList() {
+    return productDetails_;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * The main product details related to the event.
+   * This field is required for the following event types:
+   * * `add-to-cart`
+   * * `detail-page-view`
+   * * `purchase-complete`
+   * In a `search` event, this field represents the products returned to the end
+   * user on the current page (the end user may have not finished broswing the
+   * whole page yet). When a new page is returned to the end user, after
+   * pagination/filtering/ordering even for the same query, a new `search` event
+   * with different
+   * [product_details][google.cloud.retail.v2.UserEvent.product_details] is
+   * desired. The end user may have not finished broswing the whole page yet.
+   * </pre>
+   *
+   * <code>repeated .google.cloud.retail.v2.ProductDetail product_details = 6;</code>
+   */
+  @java.lang.Override
+  public java.util.List<? extends com.google.cloud.retail.v2.ProductDetailOrBuilder>
+      getProductDetailsOrBuilderList() {
+    return productDetails_;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * The main product details related to the event.
+   * This field is required for the following event types:
+   * * `add-to-cart`
+   * * `detail-page-view`
+   * * `purchase-complete`
+   * In a `search` event, this field represents the products returned to the end
+   * user on the current page (the end user may have not finished broswing the
+   * whole page yet). When a new page is returned to the end user, after
+   * pagination/filtering/ordering even for the same query, a new `search` event
+   * with different
+   * [product_details][google.cloud.retail.v2.UserEvent.product_details] is
+   * desired. The end user may have not finished broswing the whole page yet.
+   * </pre>
+   *
+   * <code>repeated .google.cloud.retail.v2.ProductDetail product_details = 6;</code>
+   */
+  @java.lang.Override
+  public int getProductDetailsCount() {
+    return productDetails_.size();
+  }
+  /**
+   *
+   *
+   * <pre>
+   * The main product details related to the event.
+   * This field is required for the following event types:
+   * * `add-to-cart`
+   * * `detail-page-view`
+   * * `purchase-complete`
+   * In a `search` event, this field represents the products returned to the end
+   * user on the current page (the end user may have not finished broswing the
+   * whole page yet). When a new page is returned to the end user, after
+   * pagination/filtering/ordering even for the same query, a new `search` event
+   * with different
+   * [product_details][google.cloud.retail.v2.UserEvent.product_details] is
+   * desired. The end user may have not finished broswing the whole page yet.
+   * </pre>
+   *
+   * <code>repeated .google.cloud.retail.v2.ProductDetail product_details = 6;</code>
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.ProductDetail getProductDetails(int index) {
+    return productDetails_.get(index);
+  }
+  /**
+   *
+   *
+   * <pre>
+   * The main product details related to the event.
+   * This field is required for the following event types:
+   * * `add-to-cart`
+   * * `detail-page-view`
+   * * `purchase-complete`
+   * In a `search` event, this field represents the products returned to the end
+   * user on the current page (the end user may have not finished broswing the
+   * whole page yet). When a new page is returned to the end user, after
+   * pagination/filtering/ordering even for the same query, a new `search` event
+   * with different
+   * [product_details][google.cloud.retail.v2.UserEvent.product_details] is
+   * desired. The end user may have not finished broswing the whole page yet.
+   * </pre>
+   *
+   * <code>repeated .google.cloud.retail.v2.ProductDetail product_details = 6;</code>
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.ProductDetailOrBuilder getProductDetailsOrBuilder(int index) {
+    return productDetails_.get(index);
+  }
+
+  public static final int ATTRIBUTES_FIELD_NUMBER = 7;
+
+  private static final class AttributesDefaultEntryHolder {
+    static final com.google.protobuf.MapEntry<
+            java.lang.String, com.google.cloud.retail.v2.CustomAttribute>
+        defaultEntry =
+            com.google.protobuf.MapEntry
+                .<java.lang.String, com.google.cloud.retail.v2.CustomAttribute>newDefaultInstance(
+                    com.google.cloud.retail.v2.UserEventProto
+                        .internal_static_google_cloud_retail_v2_UserEvent_AttributesEntry_descriptor,
+                    com.google.protobuf.WireFormat.FieldType.STRING,
+                    "",
+                    com.google.protobuf.WireFormat.FieldType.MESSAGE,
+                    com.google.cloud.retail.v2.CustomAttribute.getDefaultInstance());
+  }
+
+  private com.google.protobuf.MapField<java.lang.String, com.google.cloud.retail.v2.CustomAttribute>
+      attributes_;
+
+  private com.google.protobuf.MapField<java.lang.String, com.google.cloud.retail.v2.CustomAttribute>
+      internalGetAttributes() {
+    if (attributes_ == null) {
+      return com.google.protobuf.MapField.emptyMapField(AttributesDefaultEntryHolder.defaultEntry);
+    }
+    return attributes_;
+  }
+
+  public int getAttributesCount() {
+    return internalGetAttributes().getMap().size();
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Extra user event features to include in the recommendation model.
+   * The key must be a UTF-8 encoded string with a length limit of 5,000
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * For product recommendation, an example of extra user information is
+   * traffic_channel, i.e. how user arrives at the site. Users can arrive
+   * at the site by coming to the site directly, or coming through Google
+   * search, and etc.
+   * </pre>
+   *
+   * <code>map&lt;string, .google.cloud.retail.v2.CustomAttribute&gt; attributes = 7;</code>
+   */
+  @java.lang.Override
+  public boolean containsAttributes(java.lang.String key) {
+    if (key == null) {
+      throw new java.lang.NullPointerException();
+    }
+    return internalGetAttributes().getMap().containsKey(key);
+  }
+  /** Use {@link #getAttributesMap()} instead. */
+  @java.lang.Override
+  @java.lang.Deprecated
+  public java.util.Map<java.lang.String, com.google.cloud.retail.v2.CustomAttribute>
+      getAttributes() {
+    return getAttributesMap();
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Extra user event features to include in the recommendation model.
+   * The key must be a UTF-8 encoded string with a length limit of 5,000
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * For product recommendation, an example of extra user information is
+   * traffic_channel, i.e. how user arrives at the site. Users can arrive
+   * at the site by coming to the site directly, or coming through Google
+   * search, and etc.
+   * </pre>
+   *
+   * <code>map&lt;string, .google.cloud.retail.v2.CustomAttribute&gt; attributes = 7;</code>
+   */
+  @java.lang.Override
+  public java.util.Map<java.lang.String, com.google.cloud.retail.v2.CustomAttribute>
+      getAttributesMap() {
+    return internalGetAttributes().getMap();
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Extra user event features to include in the recommendation model.
+   * The key must be a UTF-8 encoded string with a length limit of 5,000
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * For product recommendation, an example of extra user information is
+   * traffic_channel, i.e. how user arrives at the site. Users can arrive
+   * at the site by coming to the site directly, or coming through Google
+   * search, and etc.
+   * </pre>
+   *
+   * <code>map&lt;string, .google.cloud.retail.v2.CustomAttribute&gt; attributes = 7;</code>
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.CustomAttribute getAttributesOrDefault(
+      java.lang.String key, com.google.cloud.retail.v2.CustomAttribute defaultValue) {
+    if (key == null) {
+      throw new java.lang.NullPointerException();
+    }
+    java.util.Map<java.lang.String, com.google.cloud.retail.v2.CustomAttribute> map =
+        internalGetAttributes().getMap();
+    return map.containsKey(key) ? map.get(key) : defaultValue;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Extra user event features to include in the recommendation model.
+   * The key must be a UTF-8 encoded string with a length limit of 5,000
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * For product recommendation, an example of extra user information is
+   * traffic_channel, i.e. how user arrives at the site. Users can arrive
+   * at the site by coming to the site directly, or coming through Google
+   * search, and etc.
+   * </pre>
+   *
+   * <code>map&lt;string, .google.cloud.retail.v2.CustomAttribute&gt; attributes = 7;</code>
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.CustomAttribute getAttributesOrThrow(java.lang.String key) {
+    if (key == null) {
+      throw new java.lang.NullPointerException();
+    }
+    java.util.Map<java.lang.String, com.google.cloud.retail.v2.CustomAttribute> map =
+        internalGetAttributes().getMap();
+    if (!map.containsKey(key)) {
+      throw new java.lang.IllegalArgumentException();
+    }
+    return map.get(key);
+  }
+
+  public static final int CART_ID_FIELD_NUMBER = 8;
+  private volatile java.lang.Object cartId_;
+  /**
+   *
+   *
+   * <pre>
+   * The id or name of the associated shopping cart. This id is used
+   * to associate multiple items added or present in the cart before purchase.
+   * This can only be set for `add-to-cart`, `purchase-complete`, or
+   * `shopping-cart-page-view` events.
+   * </pre>
+   *
+   * <code>string cart_id = 8;</code>
+   *
+   * @return The cartId.
+   */
+  @java.lang.Override
+  public java.lang.String getCartId() {
+    java.lang.Object ref = cartId_;
+    if (ref instanceof java.lang.String) {
+      return (java.lang.String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+      java.lang.String s = bs.toStringUtf8();
+      cartId_ = s;
+      return s;
+    }
+  }
+  /**
+   *
+   *
+   * <pre>
+   * The id or name of the associated shopping cart. This id is used
+   * to associate multiple items added or present in the cart before purchase.
+   * This can only be set for `add-to-cart`, `purchase-complete`, or
+   * `shopping-cart-page-view` events.
+   * </pre>
+   *
+   * <code>string cart_id = 8;</code>
+   *
+   * @return The bytes for cartId.
+   */
+  @java.lang.Override
+  public com.google.protobuf.ByteString getCartIdBytes() {
+    java.lang.Object ref = cartId_;
+    if (ref instanceof java.lang.String) {
+      com.google.protobuf.ByteString b =
+          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+      cartId_ = b;
+      return b;
+    } else {
+      return (com.google.protobuf.ByteString) ref;
+    }
+  }
+
+  public static final int PURCHASE_TRANSACTION_FIELD_NUMBER = 9;
+  private com.google.cloud.retail.v2.PurchaseTransaction purchaseTransaction_;
+  /**
+   *
+   *
+   * <pre>
+   * A transaction represents the entire purchase transaction.
+   * Required for `purchase-complete` events. Other event types should not set
+   * this field. Otherwise, an INVALID_ARGUMENT error is returned.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.PurchaseTransaction purchase_transaction = 9;</code>
+   *
+   * @return Whether the purchaseTransaction field is set.
+   */
+  @java.lang.Override
+  public boolean hasPurchaseTransaction() {
+    return purchaseTransaction_ != null;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * A transaction represents the entire purchase transaction.
+   * Required for `purchase-complete` events. Other event types should not set
+   * this field. Otherwise, an INVALID_ARGUMENT error is returned.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.PurchaseTransaction purchase_transaction = 9;</code>
+   *
+   * @return The purchaseTransaction.
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.PurchaseTransaction getPurchaseTransaction() {
+    return purchaseTransaction_ == null
+        ? com.google.cloud.retail.v2.PurchaseTransaction.getDefaultInstance()
+        : purchaseTransaction_;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * A transaction represents the entire purchase transaction.
+   * Required for `purchase-complete` events. Other event types should not set
+   * this field. Otherwise, an INVALID_ARGUMENT error is returned.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.PurchaseTransaction purchase_transaction = 9;</code>
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.PurchaseTransactionOrBuilder getPurchaseTransactionOrBuilder() {
+    return getPurchaseTransaction();
+  }
+
+  public static final int SEARCH_QUERY_FIELD_NUMBER = 10;
+  private volatile java.lang.Object searchQuery_;
+  /**
+   *
+   *
+   * <pre>
+   * The user's search query.
+   * The value must be a UTF-8 encoded string with a length limit of 5,000
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * Required for `search` events. Other event types should not set this field.
+   * Otherwise, an INVALID_ARGUMENT error is returned.
+   * </pre>
+   *
+   * <code>string search_query = 10;</code>
+   *
+   * @return The searchQuery.
+   */
+  @java.lang.Override
+  public java.lang.String getSearchQuery() {
+    java.lang.Object ref = searchQuery_;
+    if (ref instanceof java.lang.String) {
+      return (java.lang.String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+      java.lang.String s = bs.toStringUtf8();
+      searchQuery_ = s;
+      return s;
+    }
+  }
+  /**
+   *
+   *
+   * <pre>
+   * The user's search query.
+   * The value must be a UTF-8 encoded string with a length limit of 5,000
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * Required for `search` events. Other event types should not set this field.
+   * Otherwise, an INVALID_ARGUMENT error is returned.
+   * </pre>
+   *
+   * <code>string search_query = 10;</code>
+   *
+   * @return The bytes for searchQuery.
+   */
+  @java.lang.Override
+  public com.google.protobuf.ByteString getSearchQueryBytes() {
+    java.lang.Object ref = searchQuery_;
+    if (ref instanceof java.lang.String) {
+      com.google.protobuf.ByteString b =
+          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+      searchQuery_ = b;
+      return b;
+    } else {
+      return (com.google.protobuf.ByteString) ref;
+    }
+  }
+
+  public static final int PAGE_CATEGORIES_FIELD_NUMBER = 11;
+  private com.google.protobuf.LazyStringList pageCategories_;
+  /**
+   *
+   *
+   * <pre>
+   * The categories associated with a category page.
+   * To represent full path of category, use '&gt;' sign to separate different
+   * hierarchies. If '&gt;' is part of the category name, please replace it with
+   * other character(s).
+   * Category pages include special pages such as sales or promotions. For
+   * instance, a special sale page may have the category hierarchy:
+   * "pageCategories" : ["Sales &gt; 2017 Black Friday Deals"].
+   * Required for `category-page-view` events. Other event types should not set
+   * this field. Otherwise, an INVALID_ARGUMENT error is returned.
+   * </pre>
+   *
+   * <code>repeated string page_categories = 11;</code>
+   *
+   * @return A list containing the pageCategories.
+   */
+  public com.google.protobuf.ProtocolStringList getPageCategoriesList() {
+    return pageCategories_;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * The categories associated with a category page.
+   * To represent full path of category, use '&gt;' sign to separate different
+   * hierarchies. If '&gt;' is part of the category name, please replace it with
+   * other character(s).
+   * Category pages include special pages such as sales or promotions. For
+   * instance, a special sale page may have the category hierarchy:
+   * "pageCategories" : ["Sales &gt; 2017 Black Friday Deals"].
+   * Required for `category-page-view` events. Other event types should not set
+   * this field. Otherwise, an INVALID_ARGUMENT error is returned.
+   * </pre>
+   *
+   * <code>repeated string page_categories = 11;</code>
+   *
+   * @return The count of pageCategories.
+   */
+  public int getPageCategoriesCount() {
+    return pageCategories_.size();
+  }
+  /**
+   *
+   *
+   * <pre>
+   * The categories associated with a category page.
+   * To represent full path of category, use '&gt;' sign to separate different
+   * hierarchies. If '&gt;' is part of the category name, please replace it with
+   * other character(s).
+   * Category pages include special pages such as sales or promotions. For
+   * instance, a special sale page may have the category hierarchy:
+   * "pageCategories" : ["Sales &gt; 2017 Black Friday Deals"].
+   * Required for `category-page-view` events. Other event types should not set
+   * this field. Otherwise, an INVALID_ARGUMENT error is returned.
+   * </pre>
+   *
+   * <code>repeated string page_categories = 11;</code>
+   *
+   * @param index The index of the element to return.
+   * @return The pageCategories at the given index.
+   */
+  public java.lang.String getPageCategories(int index) {
+    return pageCategories_.get(index);
+  }
+  /**
+   *
+   *
+   * <pre>
+   * The categories associated with a category page.
+   * To represent full path of category, use '&gt;' sign to separate different
+   * hierarchies. If '&gt;' is part of the category name, please replace it with
+   * other character(s).
+   * Category pages include special pages such as sales or promotions. For
+   * instance, a special sale page may have the category hierarchy:
+   * "pageCategories" : ["Sales &gt; 2017 Black Friday Deals"].
+   * Required for `category-page-view` events. Other event types should not set
+   * this field. Otherwise, an INVALID_ARGUMENT error is returned.
+   * </pre>
+   *
+   * <code>repeated string page_categories = 11;</code>
+   *
+   * @param index The index of the value to return.
+   * @return The bytes of the pageCategories at the given index.
+   */
+  public com.google.protobuf.ByteString getPageCategoriesBytes(int index) {
+    return pageCategories_.getByteString(index);
+  }
+
+  public static final int USER_INFO_FIELD_NUMBER = 12;
+  private com.google.cloud.retail.v2.UserInfo userInfo_;
+  /**
+   *
+   *
+   * <pre>
+   * User information.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.UserInfo user_info = 12;</code>
+   *
+   * @return Whether the userInfo field is set.
+   */
+  @java.lang.Override
+  public boolean hasUserInfo() {
+    return userInfo_ != null;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * User information.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.UserInfo user_info = 12;</code>
+   *
+   * @return The userInfo.
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.UserInfo getUserInfo() {
+    return userInfo_ == null ? com.google.cloud.retail.v2.UserInfo.getDefaultInstance() : userInfo_;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * User information.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.UserInfo user_info = 12;</code>
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.UserInfoOrBuilder getUserInfoOrBuilder() {
+    return getUserInfo();
+  }
+
+  public static final int URI_FIELD_NUMBER = 13;
+  private volatile java.lang.Object uri_;
+  /**
+   *
+   *
+   * <pre>
+   * Complete URL (window.location.href) of the user's current page.
+   * When using the client side event reporting with JavaScript pixel and Google
+   * Tag Manager, this value is filled in automatically. Maximum length 5,000
+   * characters.
+   * </pre>
+   *
+   * <code>string uri = 13;</code>
+   *
+   * @return The uri.
+   */
+  @java.lang.Override
+  public java.lang.String getUri() {
+    java.lang.Object ref = uri_;
+    if (ref instanceof java.lang.String) {
+      return (java.lang.String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+      java.lang.String s = bs.toStringUtf8();
+      uri_ = s;
+      return s;
+    }
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Complete URL (window.location.href) of the user's current page.
+   * When using the client side event reporting with JavaScript pixel and Google
+   * Tag Manager, this value is filled in automatically. Maximum length 5,000
+   * characters.
+   * </pre>
+   *
+   * <code>string uri = 13;</code>
+   *
+   * @return The bytes for uri.
+   */
+  @java.lang.Override
+  public com.google.protobuf.ByteString getUriBytes() {
+    java.lang.Object ref = uri_;
+    if (ref instanceof java.lang.String) {
+      com.google.protobuf.ByteString b =
+          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+      uri_ = b;
+      return b;
+    } else {
+      return (com.google.protobuf.ByteString) ref;
+    }
+  }
+
+  public static final int REFERRER_URI_FIELD_NUMBER = 14;
+  private volatile java.lang.Object referrerUri_;
+  /**
+   *
+   *
+   * <pre>
+   * The referrer URL of the current page.
+   * When using the client side event reporting with JavaScript pixel and Google
+   * Tag Manager, this value is filled in automatically.
+   * </pre>
+   *
+   * <code>string referrer_uri = 14;</code>
+   *
+   * @return The referrerUri.
+   */
+  @java.lang.Override
+  public java.lang.String getReferrerUri() {
+    java.lang.Object ref = referrerUri_;
+    if (ref instanceof java.lang.String) {
+      return (java.lang.String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+      java.lang.String s = bs.toStringUtf8();
+      referrerUri_ = s;
+      return s;
+    }
+  }
+  /**
+   *
+   *
+   * <pre>
+   * The referrer URL of the current page.
+   * When using the client side event reporting with JavaScript pixel and Google
+   * Tag Manager, this value is filled in automatically.
+   * </pre>
+   *
+   * <code>string referrer_uri = 14;</code>
+   *
+   * @return The bytes for referrerUri.
+   */
+  @java.lang.Override
+  public com.google.protobuf.ByteString getReferrerUriBytes() {
+    java.lang.Object ref = referrerUri_;
+    if (ref instanceof java.lang.String) {
+      com.google.protobuf.ByteString b =
+          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+      referrerUri_ = b;
+      return b;
+    } else {
+      return (com.google.protobuf.ByteString) ref;
+    }
+  }
+
+  public static final int PAGE_VIEW_ID_FIELD_NUMBER = 15;
+  private volatile java.lang.Object pageViewId_;
+  /**
+   *
+   *
+   * <pre>
+   * A unique id of a web page view.
+   * This should be kept the same for all user events triggered from the same
+   * pageview. For example, an item detail page view could trigger multiple
+   * events as the user is browsing the page. The `pageViewId` property should
+   * be kept the same for all these events so that they can be grouped together
+   * properly.
+   * When using the client side event reporting with JavaScript pixel and Google
+   * Tag Manager, this value is filled in automatically.
+   * </pre>
+   *
+   * <code>string page_view_id = 15;</code>
+   *
+   * @return The pageViewId.
+   */
+  @java.lang.Override
+  public java.lang.String getPageViewId() {
+    java.lang.Object ref = pageViewId_;
+    if (ref instanceof java.lang.String) {
+      return (java.lang.String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+      java.lang.String s = bs.toStringUtf8();
+      pageViewId_ = s;
+      return s;
+    }
+  }
+  /**
+   *
+   *
+   * <pre>
+   * A unique id of a web page view.
+   * This should be kept the same for all user events triggered from the same
+   * pageview. For example, an item detail page view could trigger multiple
+   * events as the user is browsing the page. The `pageViewId` property should
+   * be kept the same for all these events so that they can be grouped together
+   * properly.
+   * When using the client side event reporting with JavaScript pixel and Google
+   * Tag Manager, this value is filled in automatically.
+   * </pre>
+   *
+   * <code>string page_view_id = 15;</code>
+   *
+   * @return The bytes for pageViewId.
+   */
+  @java.lang.Override
+  public com.google.protobuf.ByteString getPageViewIdBytes() {
+    java.lang.Object ref = pageViewId_;
+    if (ref instanceof java.lang.String) {
+      com.google.protobuf.ByteString b =
+          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+      pageViewId_ = b;
+      return b;
+    } else {
+      return (com.google.protobuf.ByteString) ref;
+    }
+  }
+
+  private byte memoizedIsInitialized = -1;
+
+  @java.lang.Override
+  public final boolean isInitialized() {
+    byte isInitialized = memoizedIsInitialized;
+    if (isInitialized == 1) return true;
+    if (isInitialized == 0) return false;
+
+    memoizedIsInitialized = 1;
+    return true;
+  }
+
+  @java.lang.Override
+  public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
+    if (!getEventTypeBytes().isEmpty()) {
+      com.google.protobuf.GeneratedMessageV3.writeString(output, 1, eventType_);
+    }
+    if (!getVisitorIdBytes().isEmpty()) {
+      com.google.protobuf.GeneratedMessageV3.writeString(output, 2, visitorId_);
+    }
+    if (eventTime_ != null) {
+      output.writeMessage(3, getEventTime());
+    }
+    for (int i = 0; i < experimentIds_.size(); i++) {
+      com.google.protobuf.GeneratedMessageV3.writeString(output, 4, experimentIds_.getRaw(i));
+    }
+    if (!getAttributionTokenBytes().isEmpty()) {
+      com.google.protobuf.GeneratedMessageV3.writeString(output, 5, attributionToken_);
+    }
+    for (int i = 0; i < productDetails_.size(); i++) {
+      output.writeMessage(6, productDetails_.get(i));
+    }
+    com.google.protobuf.GeneratedMessageV3.serializeStringMapTo(
+        output, internalGetAttributes(), AttributesDefaultEntryHolder.defaultEntry, 7);
+    if (!getCartIdBytes().isEmpty()) {
+      com.google.protobuf.GeneratedMessageV3.writeString(output, 8, cartId_);
+    }
+    if (purchaseTransaction_ != null) {
+      output.writeMessage(9, getPurchaseTransaction());
+    }
+    if (!getSearchQueryBytes().isEmpty()) {
+      com.google.protobuf.GeneratedMessageV3.writeString(output, 10, searchQuery_);
+    }
+    for (int i = 0; i < pageCategories_.size(); i++) {
+      com.google.protobuf.GeneratedMessageV3.writeString(output, 11, pageCategories_.getRaw(i));
+    }
+    if (userInfo_ != null) {
+      output.writeMessage(12, getUserInfo());
+    }
+    if (!getUriBytes().isEmpty()) {
+      com.google.protobuf.GeneratedMessageV3.writeString(output, 13, uri_);
+    }
+    if (!getReferrerUriBytes().isEmpty()) {
+      com.google.protobuf.GeneratedMessageV3.writeString(output, 14, referrerUri_);
+    }
+    if (!getPageViewIdBytes().isEmpty()) {
+      com.google.protobuf.GeneratedMessageV3.writeString(output, 15, pageViewId_);
+    }
+    unknownFields.writeTo(output);
+  }
+
+  @java.lang.Override
+  public int getSerializedSize() {
+    int size = memoizedSize;
+    if (size != -1) return size;
+
+    size = 0;
+    if (!getEventTypeBytes().isEmpty()) {
+      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(1, eventType_);
+    }
+    if (!getVisitorIdBytes().isEmpty()) {
+      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(2, visitorId_);
+    }
+    if (eventTime_ != null) {
+      size += com.google.protobuf.CodedOutputStream.computeMessageSize(3, getEventTime());
+    }
+    {
+      int dataSize = 0;
+      for (int i = 0; i < experimentIds_.size(); i++) {
+        dataSize += computeStringSizeNoTag(experimentIds_.getRaw(i));
+      }
+      size += dataSize;
+      size += 1 * getExperimentIdsList().size();
+    }
+    if (!getAttributionTokenBytes().isEmpty()) {
+      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(5, attributionToken_);
+    }
+    for (int i = 0; i < productDetails_.size(); i++) {
+      size += com.google.protobuf.CodedOutputStream.computeMessageSize(6, productDetails_.get(i));
+    }
+    for (java.util.Map.Entry<java.lang.String, com.google.cloud.retail.v2.CustomAttribute> entry :
+        internalGetAttributes().getMap().entrySet()) {
+      com.google.protobuf.MapEntry<java.lang.String, com.google.cloud.retail.v2.CustomAttribute>
+          attributes__ =
+              AttributesDefaultEntryHolder.defaultEntry
+                  .newBuilderForType()
+                  .setKey(entry.getKey())
+                  .setValue(entry.getValue())
+                  .build();
+      size += com.google.protobuf.CodedOutputStream.computeMessageSize(7, attributes__);
+    }
+    if (!getCartIdBytes().isEmpty()) {
+      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(8, cartId_);
+    }
+    if (purchaseTransaction_ != null) {
+      size += com.google.protobuf.CodedOutputStream.computeMessageSize(9, getPurchaseTransaction());
+    }
+    if (!getSearchQueryBytes().isEmpty()) {
+      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(10, searchQuery_);
+    }
+    {
+      int dataSize = 0;
+      for (int i = 0; i < pageCategories_.size(); i++) {
+        dataSize += computeStringSizeNoTag(pageCategories_.getRaw(i));
+      }
+      size += dataSize;
+      size += 1 * getPageCategoriesList().size();
+    }
+    if (userInfo_ != null) {
+      size += com.google.protobuf.CodedOutputStream.computeMessageSize(12, getUserInfo());
+    }
+    if (!getUriBytes().isEmpty()) {
+      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(13, uri_);
+    }
+    if (!getReferrerUriBytes().isEmpty()) {
+      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(14, referrerUri_);
+    }
+    if (!getPageViewIdBytes().isEmpty()) {
+      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(15, pageViewId_);
+    }
+    size += unknownFields.getSerializedSize();
+    memoizedSize = size;
+    return size;
+  }
+
+  @java.lang.Override
+  public boolean equals(final java.lang.Object obj) {
+    if (obj == this) {
+      return true;
+    }
+    if (!(obj instanceof com.google.cloud.retail.v2.UserEvent)) {
+      return super.equals(obj);
+    }
+    com.google.cloud.retail.v2.UserEvent other = (com.google.cloud.retail.v2.UserEvent) obj;
+
+    if (!getEventType().equals(other.getEventType())) return false;
+    if (!getVisitorId().equals(other.getVisitorId())) return false;
+    if (hasEventTime() != other.hasEventTime()) return false;
+    if (hasEventTime()) {
+      if (!getEventTime().equals(other.getEventTime())) return false;
+    }
+    if (!getExperimentIdsList().equals(other.getExperimentIdsList())) return false;
+    if (!getAttributionToken().equals(other.getAttributionToken())) return false;
+    if (!getProductDetailsList().equals(other.getProductDetailsList())) return false;
+    if (!internalGetAttributes().equals(other.internalGetAttributes())) return false;
+    if (!getCartId().equals(other.getCartId())) return false;
+    if (hasPurchaseTransaction() != other.hasPurchaseTransaction()) return false;
+    if (hasPurchaseTransaction()) {
+      if (!getPurchaseTransaction().equals(other.getPurchaseTransaction())) return false;
+    }
+    if (!getSearchQuery().equals(other.getSearchQuery())) return false;
+    if (!getPageCategoriesList().equals(other.getPageCategoriesList())) return false;
+    if (hasUserInfo() != other.hasUserInfo()) return false;
+    if (hasUserInfo()) {
+      if (!getUserInfo().equals(other.getUserInfo())) return false;
+    }
+    if (!getUri().equals(other.getUri())) return false;
+    if (!getReferrerUri().equals(other.getReferrerUri())) return false;
+    if (!getPageViewId().equals(other.getPageViewId())) return false;
+    if (!unknownFields.equals(other.unknownFields)) return false;
+    return true;
+  }
+
+  @java.lang.Override
+  public int hashCode() {
+    if (memoizedHashCode != 0) {
+      return memoizedHashCode;
+    }
+    int hash = 41;
+    hash = (19 * hash) + getDescriptor().hashCode();
+    hash = (37 * hash) + EVENT_TYPE_FIELD_NUMBER;
+    hash = (53 * hash) + getEventType().hashCode();
+    hash = (37 * hash) + VISITOR_ID_FIELD_NUMBER;
+    hash = (53 * hash) + getVisitorId().hashCode();
+    if (hasEventTime()) {
+      hash = (37 * hash) + EVENT_TIME_FIELD_NUMBER;
+      hash = (53 * hash) + getEventTime().hashCode();
+    }
+    if (getExperimentIdsCount() > 0) {
+      hash = (37 * hash) + EXPERIMENT_IDS_FIELD_NUMBER;
+      hash = (53 * hash) + getExperimentIdsList().hashCode();
+    }
+    hash = (37 * hash) + ATTRIBUTION_TOKEN_FIELD_NUMBER;
+    hash = (53 * hash) + getAttributionToken().hashCode();
+    if (getProductDetailsCount() > 0) {
+      hash = (37 * hash) + PRODUCT_DETAILS_FIELD_NUMBER;
+      hash = (53 * hash) + getProductDetailsList().hashCode();
+    }
+    if (!internalGetAttributes().getMap().isEmpty()) {
+      hash = (37 * hash) + ATTRIBUTES_FIELD_NUMBER;
+      hash = (53 * hash) + internalGetAttributes().hashCode();
+    }
+    hash = (37 * hash) + CART_ID_FIELD_NUMBER;
+    hash = (53 * hash) + getCartId().hashCode();
+    if (hasPurchaseTransaction()) {
+      hash = (37 * hash) + PURCHASE_TRANSACTION_FIELD_NUMBER;
+      hash = (53 * hash) + getPurchaseTransaction().hashCode();
+    }
+    hash = (37 * hash) + SEARCH_QUERY_FIELD_NUMBER;
+    hash = (53 * hash) + getSearchQuery().hashCode();
+    if (getPageCategoriesCount() > 0) {
+      hash = (37 * hash) + PAGE_CATEGORIES_FIELD_NUMBER;
+      hash = (53 * hash) + getPageCategoriesList().hashCode();
+    }
+    if (hasUserInfo()) {
+      hash = (37 * hash) + USER_INFO_FIELD_NUMBER;
+      hash = (53 * hash) + getUserInfo().hashCode();
+    }
+    hash = (37 * hash) + URI_FIELD_NUMBER;
+    hash = (53 * hash) + getUri().hashCode();
+    hash = (37 * hash) + REFERRER_URI_FIELD_NUMBER;
+    hash = (53 * hash) + getReferrerUri().hashCode();
+    hash = (37 * hash) + PAGE_VIEW_ID_FIELD_NUMBER;
+    hash = (53 * hash) + getPageViewId().hashCode();
+    hash = (29 * hash) + unknownFields.hashCode();
+    memoizedHashCode = hash;
+    return hash;
+  }
+
+  public static com.google.cloud.retail.v2.UserEvent parseFrom(java.nio.ByteBuffer data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.UserEvent parseFrom(
+      java.nio.ByteBuffer data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.UserEvent parseFrom(com.google.protobuf.ByteString data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.UserEvent parseFrom(
+      com.google.protobuf.ByteString data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.UserEvent parseFrom(byte[] data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.UserEvent parseFrom(
+      byte[] data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.UserEvent parseFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.UserEvent parseFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.UserEvent parseDelimitedFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.UserEvent parseDelimitedFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.UserEvent parseFrom(
+      com.google.protobuf.CodedInputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.UserEvent parseFrom(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  @java.lang.Override
+  public Builder newBuilderForType() {
+    return newBuilder();
+  }
+
+  public static Builder newBuilder() {
+    return DEFAULT_INSTANCE.toBuilder();
+  }
+
+  public static Builder newBuilder(com.google.cloud.retail.v2.UserEvent prototype) {
+    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+  }
+
+  @java.lang.Override
+  public Builder toBuilder() {
+    return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
+  }
+
+  @java.lang.Override
+  protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+    Builder builder = new Builder(parent);
+    return builder;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * UserEvent captures all metadata information Retail API needs to know about
+   * how end users interact with customers' website.
+   * </pre>
+   *
+   * Protobuf type {@code google.cloud.retail.v2.UserEvent}
+   */
+  public static final class Builder extends com.google.protobuf.GeneratedMessageV3.Builder<Builder>
+      implements
+      // @@protoc_insertion_point(builder_implements:google.cloud.retail.v2.UserEvent)
+      com.google.cloud.retail.v2.UserEventOrBuilder {
+    public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+      return com.google.cloud.retail.v2.UserEventProto
+          .internal_static_google_cloud_retail_v2_UserEvent_descriptor;
+    }
+
+    @SuppressWarnings({"rawtypes"})
+    protected com.google.protobuf.MapField internalGetMapField(int number) {
+      switch (number) {
+        case 7:
+          return internalGetAttributes();
+        default:
+          throw new RuntimeException("Invalid map field number: " + number);
+      }
+    }
+
+    @SuppressWarnings({"rawtypes"})
+    protected com.google.protobuf.MapField internalGetMutableMapField(int number) {
+      switch (number) {
+        case 7:
+          return internalGetMutableAttributes();
+        default:
+          throw new RuntimeException("Invalid map field number: " + number);
+      }
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return com.google.cloud.retail.v2.UserEventProto
+          .internal_static_google_cloud_retail_v2_UserEvent_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              com.google.cloud.retail.v2.UserEvent.class,
+              com.google.cloud.retail.v2.UserEvent.Builder.class);
+    }
+
+    // Construct using com.google.cloud.retail.v2.UserEvent.newBuilder()
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
+
+    private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+      super(parent);
+      maybeForceBuilderInitialization();
+    }
+
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders) {
+        getProductDetailsFieldBuilder();
+      }
+    }
+
+    @java.lang.Override
+    public Builder clear() {
+      super.clear();
+      eventType_ = "";
+
+      visitorId_ = "";
+
+      if (eventTimeBuilder_ == null) {
+        eventTime_ = null;
+      } else {
+        eventTime_ = null;
+        eventTimeBuilder_ = null;
+      }
+      experimentIds_ = com.google.protobuf.LazyStringArrayList.EMPTY;
+      bitField0_ = (bitField0_ & ~0x00000001);
+      attributionToken_ = "";
+
+      if (productDetailsBuilder_ == null) {
+        productDetails_ = java.util.Collections.emptyList();
+        bitField0_ = (bitField0_ & ~0x00000002);
+      } else {
+        productDetailsBuilder_.clear();
+      }
+      internalGetMutableAttributes().clear();
+      cartId_ = "";
+
+      if (purchaseTransactionBuilder_ == null) {
+        purchaseTransaction_ = null;
+      } else {
+        purchaseTransaction_ = null;
+        purchaseTransactionBuilder_ = null;
+      }
+      searchQuery_ = "";
+
+      pageCategories_ = com.google.protobuf.LazyStringArrayList.EMPTY;
+      bitField0_ = (bitField0_ & ~0x00000008);
+      if (userInfoBuilder_ == null) {
+        userInfo_ = null;
+      } else {
+        userInfo_ = null;
+        userInfoBuilder_ = null;
+      }
+      uri_ = "";
+
+      referrerUri_ = "";
+
+      pageViewId_ = "";
+
+      return this;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
+      return com.google.cloud.retail.v2.UserEventProto
+          .internal_static_google_cloud_retail_v2_UserEvent_descriptor;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.UserEvent getDefaultInstanceForType() {
+      return com.google.cloud.retail.v2.UserEvent.getDefaultInstance();
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.UserEvent build() {
+      com.google.cloud.retail.v2.UserEvent result = buildPartial();
+      if (!result.isInitialized()) {
+        throw newUninitializedMessageException(result);
+      }
+      return result;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.UserEvent buildPartial() {
+      com.google.cloud.retail.v2.UserEvent result = new com.google.cloud.retail.v2.UserEvent(this);
+      int from_bitField0_ = bitField0_;
+      result.eventType_ = eventType_;
+      result.visitorId_ = visitorId_;
+      if (eventTimeBuilder_ == null) {
+        result.eventTime_ = eventTime_;
+      } else {
+        result.eventTime_ = eventTimeBuilder_.build();
+      }
+      if (((bitField0_ & 0x00000001) != 0)) {
+        experimentIds_ = experimentIds_.getUnmodifiableView();
+        bitField0_ = (bitField0_ & ~0x00000001);
+      }
+      result.experimentIds_ = experimentIds_;
+      result.attributionToken_ = attributionToken_;
+      if (productDetailsBuilder_ == null) {
+        if (((bitField0_ & 0x00000002) != 0)) {
+          productDetails_ = java.util.Collections.unmodifiableList(productDetails_);
+          bitField0_ = (bitField0_ & ~0x00000002);
+        }
+        result.productDetails_ = productDetails_;
+      } else {
+        result.productDetails_ = productDetailsBuilder_.build();
+      }
+      result.attributes_ = internalGetAttributes();
+      result.attributes_.makeImmutable();
+      result.cartId_ = cartId_;
+      if (purchaseTransactionBuilder_ == null) {
+        result.purchaseTransaction_ = purchaseTransaction_;
+      } else {
+        result.purchaseTransaction_ = purchaseTransactionBuilder_.build();
+      }
+      result.searchQuery_ = searchQuery_;
+      if (((bitField0_ & 0x00000008) != 0)) {
+        pageCategories_ = pageCategories_.getUnmodifiableView();
+        bitField0_ = (bitField0_ & ~0x00000008);
+      }
+      result.pageCategories_ = pageCategories_;
+      if (userInfoBuilder_ == null) {
+        result.userInfo_ = userInfo_;
+      } else {
+        result.userInfo_ = userInfoBuilder_.build();
+      }
+      result.uri_ = uri_;
+      result.referrerUri_ = referrerUri_;
+      result.pageViewId_ = pageViewId_;
+      onBuilt();
+      return result;
+    }
+
+    @java.lang.Override
+    public Builder clone() {
+      return super.clone();
+    }
+
+    @java.lang.Override
+    public Builder setField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.setField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
+      return super.clearField(field);
+    }
+
+    @java.lang.Override
+    public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+      return super.clearOneof(oneof);
+    }
+
+    @java.lang.Override
+    public Builder setRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, int index, java.lang.Object value) {
+      return super.setRepeatedField(field, index, value);
+    }
+
+    @java.lang.Override
+    public Builder addRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.addRepeatedField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(com.google.protobuf.Message other) {
+      if (other instanceof com.google.cloud.retail.v2.UserEvent) {
+        return mergeFrom((com.google.cloud.retail.v2.UserEvent) other);
+      } else {
+        super.mergeFrom(other);
+        return this;
+      }
+    }
+
+    public Builder mergeFrom(com.google.cloud.retail.v2.UserEvent other) {
+      if (other == com.google.cloud.retail.v2.UserEvent.getDefaultInstance()) return this;
+      if (!other.getEventType().isEmpty()) {
+        eventType_ = other.eventType_;
+        onChanged();
+      }
+      if (!other.getVisitorId().isEmpty()) {
+        visitorId_ = other.visitorId_;
+        onChanged();
+      }
+      if (other.hasEventTime()) {
+        mergeEventTime(other.getEventTime());
+      }
+      if (!other.experimentIds_.isEmpty()) {
+        if (experimentIds_.isEmpty()) {
+          experimentIds_ = other.experimentIds_;
+          bitField0_ = (bitField0_ & ~0x00000001);
+        } else {
+          ensureExperimentIdsIsMutable();
+          experimentIds_.addAll(other.experimentIds_);
+        }
+        onChanged();
+      }
+      if (!other.getAttributionToken().isEmpty()) {
+        attributionToken_ = other.attributionToken_;
+        onChanged();
+      }
+      if (productDetailsBuilder_ == null) {
+        if (!other.productDetails_.isEmpty()) {
+          if (productDetails_.isEmpty()) {
+            productDetails_ = other.productDetails_;
+            bitField0_ = (bitField0_ & ~0x00000002);
+          } else {
+            ensureProductDetailsIsMutable();
+            productDetails_.addAll(other.productDetails_);
+          }
+          onChanged();
+        }
+      } else {
+        if (!other.productDetails_.isEmpty()) {
+          if (productDetailsBuilder_.isEmpty()) {
+            productDetailsBuilder_.dispose();
+            productDetailsBuilder_ = null;
+            productDetails_ = other.productDetails_;
+            bitField0_ = (bitField0_ & ~0x00000002);
+            productDetailsBuilder_ =
+                com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders
+                    ? getProductDetailsFieldBuilder()
+                    : null;
+          } else {
+            productDetailsBuilder_.addAllMessages(other.productDetails_);
+          }
+        }
+      }
+      internalGetMutableAttributes().mergeFrom(other.internalGetAttributes());
+      if (!other.getCartId().isEmpty()) {
+        cartId_ = other.cartId_;
+        onChanged();
+      }
+      if (other.hasPurchaseTransaction()) {
+        mergePurchaseTransaction(other.getPurchaseTransaction());
+      }
+      if (!other.getSearchQuery().isEmpty()) {
+        searchQuery_ = other.searchQuery_;
+        onChanged();
+      }
+      if (!other.pageCategories_.isEmpty()) {
+        if (pageCategories_.isEmpty()) {
+          pageCategories_ = other.pageCategories_;
+          bitField0_ = (bitField0_ & ~0x00000008);
+        } else {
+          ensurePageCategoriesIsMutable();
+          pageCategories_.addAll(other.pageCategories_);
+        }
+        onChanged();
+      }
+      if (other.hasUserInfo()) {
+        mergeUserInfo(other.getUserInfo());
+      }
+      if (!other.getUri().isEmpty()) {
+        uri_ = other.uri_;
+        onChanged();
+      }
+      if (!other.getReferrerUri().isEmpty()) {
+        referrerUri_ = other.referrerUri_;
+        onChanged();
+      }
+      if (!other.getPageViewId().isEmpty()) {
+        pageViewId_ = other.pageViewId_;
+        onChanged();
+      }
+      this.mergeUnknownFields(other.unknownFields);
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final boolean isInitialized() {
+      return true;
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      com.google.cloud.retail.v2.UserEvent parsedMessage = null;
+      try {
+        parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        parsedMessage = (com.google.cloud.retail.v2.UserEvent) e.getUnfinishedMessage();
+        throw e.unwrapIOException();
+      } finally {
+        if (parsedMessage != null) {
+          mergeFrom(parsedMessage);
+        }
+      }
+      return this;
+    }
+
+    private int bitField0_;
+
+    private java.lang.Object eventType_ = "";
+    /**
+     *
+     *
+     * <pre>
+     * Required. User event type. Allowed values are:
+     * * `add-to-cart`: Products being added to cart.
+     * * `category-page-view`: Special pages such as sale or promotion pages
+     *   viewed.
+     * * `detail-page-view`: Products detail page viewed.
+     * * `home-page-view`: Homepage viewed.
+     * * `purchase-complete`: User finishing a purchase.
+     * * `search`: Product search.
+     * * `shopping-cart-page-view`: User viewing a shopping cart.
+     * </pre>
+     *
+     * <code>string event_type = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @return The eventType.
+     */
+    public java.lang.String getEventType() {
+      java.lang.Object ref = eventType_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        eventType_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. User event type. Allowed values are:
+     * * `add-to-cart`: Products being added to cart.
+     * * `category-page-view`: Special pages such as sale or promotion pages
+     *   viewed.
+     * * `detail-page-view`: Products detail page viewed.
+     * * `home-page-view`: Homepage viewed.
+     * * `purchase-complete`: User finishing a purchase.
+     * * `search`: Product search.
+     * * `shopping-cart-page-view`: User viewing a shopping cart.
+     * </pre>
+     *
+     * <code>string event_type = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @return The bytes for eventType.
+     */
+    public com.google.protobuf.ByteString getEventTypeBytes() {
+      java.lang.Object ref = eventType_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b =
+            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+        eventType_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. User event type. Allowed values are:
+     * * `add-to-cart`: Products being added to cart.
+     * * `category-page-view`: Special pages such as sale or promotion pages
+     *   viewed.
+     * * `detail-page-view`: Products detail page viewed.
+     * * `home-page-view`: Homepage viewed.
+     * * `purchase-complete`: User finishing a purchase.
+     * * `search`: Product search.
+     * * `shopping-cart-page-view`: User viewing a shopping cart.
+     * </pre>
+     *
+     * <code>string event_type = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @param value The eventType to set.
+     * @return This builder for chaining.
+     */
+    public Builder setEventType(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+
+      eventType_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. User event type. Allowed values are:
+     * * `add-to-cart`: Products being added to cart.
+     * * `category-page-view`: Special pages such as sale or promotion pages
+     *   viewed.
+     * * `detail-page-view`: Products detail page viewed.
+     * * `home-page-view`: Homepage viewed.
+     * * `purchase-complete`: User finishing a purchase.
+     * * `search`: Product search.
+     * * `shopping-cart-page-view`: User viewing a shopping cart.
+     * </pre>
+     *
+     * <code>string event_type = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearEventType() {
+
+      eventType_ = getDefaultInstance().getEventType();
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. User event type. Allowed values are:
+     * * `add-to-cart`: Products being added to cart.
+     * * `category-page-view`: Special pages such as sale or promotion pages
+     *   viewed.
+     * * `detail-page-view`: Products detail page viewed.
+     * * `home-page-view`: Homepage viewed.
+     * * `purchase-complete`: User finishing a purchase.
+     * * `search`: Product search.
+     * * `shopping-cart-page-view`: User viewing a shopping cart.
+     * </pre>
+     *
+     * <code>string event_type = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @param value The bytes for eventType to set.
+     * @return This builder for chaining.
+     */
+    public Builder setEventTypeBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+
+      eventType_ = value;
+      onChanged();
+      return this;
+    }
+
+    private java.lang.Object visitorId_ = "";
+    /**
+     *
+     *
+     * <pre>
+     * Required. A unique identifier for tracking visitors.
+     * For example, this could be implemented with an HTTP cookie, which should be
+     * able to uniquely identify a visitor on a single device. This unique
+     * identifier should not change if the visitor log in/out of the website.
+     * The field must be a UTF-8 encoded string with a length limit of 128
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>string visitor_id = 2 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @return The visitorId.
+     */
+    public java.lang.String getVisitorId() {
+      java.lang.Object ref = visitorId_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        visitorId_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. A unique identifier for tracking visitors.
+     * For example, this could be implemented with an HTTP cookie, which should be
+     * able to uniquely identify a visitor on a single device. This unique
+     * identifier should not change if the visitor log in/out of the website.
+     * The field must be a UTF-8 encoded string with a length limit of 128
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>string visitor_id = 2 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @return The bytes for visitorId.
+     */
+    public com.google.protobuf.ByteString getVisitorIdBytes() {
+      java.lang.Object ref = visitorId_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b =
+            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+        visitorId_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. A unique identifier for tracking visitors.
+     * For example, this could be implemented with an HTTP cookie, which should be
+     * able to uniquely identify a visitor on a single device. This unique
+     * identifier should not change if the visitor log in/out of the website.
+     * The field must be a UTF-8 encoded string with a length limit of 128
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>string visitor_id = 2 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @param value The visitorId to set.
+     * @return This builder for chaining.
+     */
+    public Builder setVisitorId(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+
+      visitorId_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. A unique identifier for tracking visitors.
+     * For example, this could be implemented with an HTTP cookie, which should be
+     * able to uniquely identify a visitor on a single device. This unique
+     * identifier should not change if the visitor log in/out of the website.
+     * The field must be a UTF-8 encoded string with a length limit of 128
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>string visitor_id = 2 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearVisitorId() {
+
+      visitorId_ = getDefaultInstance().getVisitorId();
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. A unique identifier for tracking visitors.
+     * For example, this could be implemented with an HTTP cookie, which should be
+     * able to uniquely identify a visitor on a single device. This unique
+     * identifier should not change if the visitor log in/out of the website.
+     * The field must be a UTF-8 encoded string with a length limit of 128
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>string visitor_id = 2 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @param value The bytes for visitorId to set.
+     * @return This builder for chaining.
+     */
+    public Builder setVisitorIdBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+
+      visitorId_ = value;
+      onChanged();
+      return this;
+    }
+
+    private com.google.protobuf.Timestamp eventTime_;
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.protobuf.Timestamp,
+            com.google.protobuf.Timestamp.Builder,
+            com.google.protobuf.TimestampOrBuilder>
+        eventTimeBuilder_;
+    /**
+     *
+     *
+     * <pre>
+     * Only required for
+     * [UserEventService.ImportUserEvents][google.cloud.retail.v2.UserEventService.ImportUserEvents]
+     * method. Timestamp of when the user event happened.
+     * </pre>
+     *
+     * <code>.google.protobuf.Timestamp event_time = 3;</code>
+     *
+     * @return Whether the eventTime field is set.
+     */
+    public boolean hasEventTime() {
+      return eventTimeBuilder_ != null || eventTime_ != null;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Only required for
+     * [UserEventService.ImportUserEvents][google.cloud.retail.v2.UserEventService.ImportUserEvents]
+     * method. Timestamp of when the user event happened.
+     * </pre>
+     *
+     * <code>.google.protobuf.Timestamp event_time = 3;</code>
+     *
+     * @return The eventTime.
+     */
+    public com.google.protobuf.Timestamp getEventTime() {
+      if (eventTimeBuilder_ == null) {
+        return eventTime_ == null ? com.google.protobuf.Timestamp.getDefaultInstance() : eventTime_;
+      } else {
+        return eventTimeBuilder_.getMessage();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Only required for
+     * [UserEventService.ImportUserEvents][google.cloud.retail.v2.UserEventService.ImportUserEvents]
+     * method. Timestamp of when the user event happened.
+     * </pre>
+     *
+     * <code>.google.protobuf.Timestamp event_time = 3;</code>
+     */
+    public Builder setEventTime(com.google.protobuf.Timestamp value) {
+      if (eventTimeBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        eventTime_ = value;
+        onChanged();
+      } else {
+        eventTimeBuilder_.setMessage(value);
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Only required for
+     * [UserEventService.ImportUserEvents][google.cloud.retail.v2.UserEventService.ImportUserEvents]
+     * method. Timestamp of when the user event happened.
+     * </pre>
+     *
+     * <code>.google.protobuf.Timestamp event_time = 3;</code>
+     */
+    public Builder setEventTime(com.google.protobuf.Timestamp.Builder builderForValue) {
+      if (eventTimeBuilder_ == null) {
+        eventTime_ = builderForValue.build();
+        onChanged();
+      } else {
+        eventTimeBuilder_.setMessage(builderForValue.build());
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Only required for
+     * [UserEventService.ImportUserEvents][google.cloud.retail.v2.UserEventService.ImportUserEvents]
+     * method. Timestamp of when the user event happened.
+     * </pre>
+     *
+     * <code>.google.protobuf.Timestamp event_time = 3;</code>
+     */
+    public Builder mergeEventTime(com.google.protobuf.Timestamp value) {
+      if (eventTimeBuilder_ == null) {
+        if (eventTime_ != null) {
+          eventTime_ =
+              com.google.protobuf.Timestamp.newBuilder(eventTime_).mergeFrom(value).buildPartial();
+        } else {
+          eventTime_ = value;
+        }
+        onChanged();
+      } else {
+        eventTimeBuilder_.mergeFrom(value);
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Only required for
+     * [UserEventService.ImportUserEvents][google.cloud.retail.v2.UserEventService.ImportUserEvents]
+     * method. Timestamp of when the user event happened.
+     * </pre>
+     *
+     * <code>.google.protobuf.Timestamp event_time = 3;</code>
+     */
+    public Builder clearEventTime() {
+      if (eventTimeBuilder_ == null) {
+        eventTime_ = null;
+        onChanged();
+      } else {
+        eventTime_ = null;
+        eventTimeBuilder_ = null;
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Only required for
+     * [UserEventService.ImportUserEvents][google.cloud.retail.v2.UserEventService.ImportUserEvents]
+     * method. Timestamp of when the user event happened.
+     * </pre>
+     *
+     * <code>.google.protobuf.Timestamp event_time = 3;</code>
+     */
+    public com.google.protobuf.Timestamp.Builder getEventTimeBuilder() {
+
+      onChanged();
+      return getEventTimeFieldBuilder().getBuilder();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Only required for
+     * [UserEventService.ImportUserEvents][google.cloud.retail.v2.UserEventService.ImportUserEvents]
+     * method. Timestamp of when the user event happened.
+     * </pre>
+     *
+     * <code>.google.protobuf.Timestamp event_time = 3;</code>
+     */
+    public com.google.protobuf.TimestampOrBuilder getEventTimeOrBuilder() {
+      if (eventTimeBuilder_ != null) {
+        return eventTimeBuilder_.getMessageOrBuilder();
+      } else {
+        return eventTime_ == null ? com.google.protobuf.Timestamp.getDefaultInstance() : eventTime_;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Only required for
+     * [UserEventService.ImportUserEvents][google.cloud.retail.v2.UserEventService.ImportUserEvents]
+     * method. Timestamp of when the user event happened.
+     * </pre>
+     *
+     * <code>.google.protobuf.Timestamp event_time = 3;</code>
+     */
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.protobuf.Timestamp,
+            com.google.protobuf.Timestamp.Builder,
+            com.google.protobuf.TimestampOrBuilder>
+        getEventTimeFieldBuilder() {
+      if (eventTimeBuilder_ == null) {
+        eventTimeBuilder_ =
+            new com.google.protobuf.SingleFieldBuilderV3<
+                com.google.protobuf.Timestamp,
+                com.google.protobuf.Timestamp.Builder,
+                com.google.protobuf.TimestampOrBuilder>(
+                getEventTime(), getParentForChildren(), isClean());
+        eventTime_ = null;
+      }
+      return eventTimeBuilder_;
+    }
+
+    private com.google.protobuf.LazyStringList experimentIds_ =
+        com.google.protobuf.LazyStringArrayList.EMPTY;
+
+    private void ensureExperimentIdsIsMutable() {
+      if (!((bitField0_ & 0x00000001) != 0)) {
+        experimentIds_ = new com.google.protobuf.LazyStringArrayList(experimentIds_);
+        bitField0_ |= 0x00000001;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A list of identifiers for the independent experiment groups this user event
+     * belongs to. This is used to distinguish between user events associated with
+     * different experiment setups (e.g. using Retail API, using different
+     * recommendation models).
+     * </pre>
+     *
+     * <code>repeated string experiment_ids = 4;</code>
+     *
+     * @return A list containing the experimentIds.
+     */
+    public com.google.protobuf.ProtocolStringList getExperimentIdsList() {
+      return experimentIds_.getUnmodifiableView();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A list of identifiers for the independent experiment groups this user event
+     * belongs to. This is used to distinguish between user events associated with
+     * different experiment setups (e.g. using Retail API, using different
+     * recommendation models).
+     * </pre>
+     *
+     * <code>repeated string experiment_ids = 4;</code>
+     *
+     * @return The count of experimentIds.
+     */
+    public int getExperimentIdsCount() {
+      return experimentIds_.size();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A list of identifiers for the independent experiment groups this user event
+     * belongs to. This is used to distinguish between user events associated with
+     * different experiment setups (e.g. using Retail API, using different
+     * recommendation models).
+     * </pre>
+     *
+     * <code>repeated string experiment_ids = 4;</code>
+     *
+     * @param index The index of the element to return.
+     * @return The experimentIds at the given index.
+     */
+    public java.lang.String getExperimentIds(int index) {
+      return experimentIds_.get(index);
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A list of identifiers for the independent experiment groups this user event
+     * belongs to. This is used to distinguish between user events associated with
+     * different experiment setups (e.g. using Retail API, using different
+     * recommendation models).
+     * </pre>
+     *
+     * <code>repeated string experiment_ids = 4;</code>
+     *
+     * @param index The index of the value to return.
+     * @return The bytes of the experimentIds at the given index.
+     */
+    public com.google.protobuf.ByteString getExperimentIdsBytes(int index) {
+      return experimentIds_.getByteString(index);
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A list of identifiers for the independent experiment groups this user event
+     * belongs to. This is used to distinguish between user events associated with
+     * different experiment setups (e.g. using Retail API, using different
+     * recommendation models).
+     * </pre>
+     *
+     * <code>repeated string experiment_ids = 4;</code>
+     *
+     * @param index The index to set the value at.
+     * @param value The experimentIds to set.
+     * @return This builder for chaining.
+     */
+    public Builder setExperimentIds(int index, java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      ensureExperimentIdsIsMutable();
+      experimentIds_.set(index, value);
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A list of identifiers for the independent experiment groups this user event
+     * belongs to. This is used to distinguish between user events associated with
+     * different experiment setups (e.g. using Retail API, using different
+     * recommendation models).
+     * </pre>
+     *
+     * <code>repeated string experiment_ids = 4;</code>
+     *
+     * @param value The experimentIds to add.
+     * @return This builder for chaining.
+     */
+    public Builder addExperimentIds(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      ensureExperimentIdsIsMutable();
+      experimentIds_.add(value);
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A list of identifiers for the independent experiment groups this user event
+     * belongs to. This is used to distinguish between user events associated with
+     * different experiment setups (e.g. using Retail API, using different
+     * recommendation models).
+     * </pre>
+     *
+     * <code>repeated string experiment_ids = 4;</code>
+     *
+     * @param values The experimentIds to add.
+     * @return This builder for chaining.
+     */
+    public Builder addAllExperimentIds(java.lang.Iterable<java.lang.String> values) {
+      ensureExperimentIdsIsMutable();
+      com.google.protobuf.AbstractMessageLite.Builder.addAll(values, experimentIds_);
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A list of identifiers for the independent experiment groups this user event
+     * belongs to. This is used to distinguish between user events associated with
+     * different experiment setups (e.g. using Retail API, using different
+     * recommendation models).
+     * </pre>
+     *
+     * <code>repeated string experiment_ids = 4;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearExperimentIds() {
+      experimentIds_ = com.google.protobuf.LazyStringArrayList.EMPTY;
+      bitField0_ = (bitField0_ & ~0x00000001);
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A list of identifiers for the independent experiment groups this user event
+     * belongs to. This is used to distinguish between user events associated with
+     * different experiment setups (e.g. using Retail API, using different
+     * recommendation models).
+     * </pre>
+     *
+     * <code>repeated string experiment_ids = 4;</code>
+     *
+     * @param value The bytes of the experimentIds to add.
+     * @return This builder for chaining.
+     */
+    public Builder addExperimentIdsBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+      ensureExperimentIdsIsMutable();
+      experimentIds_.add(value);
+      onChanged();
+      return this;
+    }
+
+    private java.lang.Object attributionToken_ = "";
+    /**
+     *
+     *
+     * <pre>
+     * Highly recommended for user events that are the result of
+     * [PredictionService.Predict][google.cloud.retail.v2.PredictionService.Predict].
+     * This field enables accurate attribution of recommendation model
+     * performance.
+     * The value must be a valid
+     * [PredictResponse.attribution_token][google.cloud.retail.v2.PredictResponse.attribution_token]
+     * for user events that are the result of
+     * [PredictionService.Predict][google.cloud.retail.v2.PredictionService.Predict].
+     * This token enables us to accurately attribute page view or purchase back to
+     * the event and the particular predict response containing this
+     * clicked/purchased product. If user clicks on product K in the
+     * recommendation results, pass
+     * [PredictResponse.attribution_token][google.cloud.retail.v2.PredictResponse.attribution_token]
+     * as a URL parameter to product K's page. When recording events on product
+     * K's page, log the
+     * [PredictResponse.attribution_token][google.cloud.retail.v2.PredictResponse.attribution_token]
+     * to this field.
+     * </pre>
+     *
+     * <code>string attribution_token = 5;</code>
+     *
+     * @return The attributionToken.
+     */
+    public java.lang.String getAttributionToken() {
+      java.lang.Object ref = attributionToken_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        attributionToken_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Highly recommended for user events that are the result of
+     * [PredictionService.Predict][google.cloud.retail.v2.PredictionService.Predict].
+     * This field enables accurate attribution of recommendation model
+     * performance.
+     * The value must be a valid
+     * [PredictResponse.attribution_token][google.cloud.retail.v2.PredictResponse.attribution_token]
+     * for user events that are the result of
+     * [PredictionService.Predict][google.cloud.retail.v2.PredictionService.Predict].
+     * This token enables us to accurately attribute page view or purchase back to
+     * the event and the particular predict response containing this
+     * clicked/purchased product. If user clicks on product K in the
+     * recommendation results, pass
+     * [PredictResponse.attribution_token][google.cloud.retail.v2.PredictResponse.attribution_token]
+     * as a URL parameter to product K's page. When recording events on product
+     * K's page, log the
+     * [PredictResponse.attribution_token][google.cloud.retail.v2.PredictResponse.attribution_token]
+     * to this field.
+     * </pre>
+     *
+     * <code>string attribution_token = 5;</code>
+     *
+     * @return The bytes for attributionToken.
+     */
+    public com.google.protobuf.ByteString getAttributionTokenBytes() {
+      java.lang.Object ref = attributionToken_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b =
+            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+        attributionToken_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Highly recommended for user events that are the result of
+     * [PredictionService.Predict][google.cloud.retail.v2.PredictionService.Predict].
+     * This field enables accurate attribution of recommendation model
+     * performance.
+     * The value must be a valid
+     * [PredictResponse.attribution_token][google.cloud.retail.v2.PredictResponse.attribution_token]
+     * for user events that are the result of
+     * [PredictionService.Predict][google.cloud.retail.v2.PredictionService.Predict].
+     * This token enables us to accurately attribute page view or purchase back to
+     * the event and the particular predict response containing this
+     * clicked/purchased product. If user clicks on product K in the
+     * recommendation results, pass
+     * [PredictResponse.attribution_token][google.cloud.retail.v2.PredictResponse.attribution_token]
+     * as a URL parameter to product K's page. When recording events on product
+     * K's page, log the
+     * [PredictResponse.attribution_token][google.cloud.retail.v2.PredictResponse.attribution_token]
+     * to this field.
+     * </pre>
+     *
+     * <code>string attribution_token = 5;</code>
+     *
+     * @param value The attributionToken to set.
+     * @return This builder for chaining.
+     */
+    public Builder setAttributionToken(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+
+      attributionToken_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Highly recommended for user events that are the result of
+     * [PredictionService.Predict][google.cloud.retail.v2.PredictionService.Predict].
+     * This field enables accurate attribution of recommendation model
+     * performance.
+     * The value must be a valid
+     * [PredictResponse.attribution_token][google.cloud.retail.v2.PredictResponse.attribution_token]
+     * for user events that are the result of
+     * [PredictionService.Predict][google.cloud.retail.v2.PredictionService.Predict].
+     * This token enables us to accurately attribute page view or purchase back to
+     * the event and the particular predict response containing this
+     * clicked/purchased product. If user clicks on product K in the
+     * recommendation results, pass
+     * [PredictResponse.attribution_token][google.cloud.retail.v2.PredictResponse.attribution_token]
+     * as a URL parameter to product K's page. When recording events on product
+     * K's page, log the
+     * [PredictResponse.attribution_token][google.cloud.retail.v2.PredictResponse.attribution_token]
+     * to this field.
+     * </pre>
+     *
+     * <code>string attribution_token = 5;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearAttributionToken() {
+
+      attributionToken_ = getDefaultInstance().getAttributionToken();
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Highly recommended for user events that are the result of
+     * [PredictionService.Predict][google.cloud.retail.v2.PredictionService.Predict].
+     * This field enables accurate attribution of recommendation model
+     * performance.
+     * The value must be a valid
+     * [PredictResponse.attribution_token][google.cloud.retail.v2.PredictResponse.attribution_token]
+     * for user events that are the result of
+     * [PredictionService.Predict][google.cloud.retail.v2.PredictionService.Predict].
+     * This token enables us to accurately attribute page view or purchase back to
+     * the event and the particular predict response containing this
+     * clicked/purchased product. If user clicks on product K in the
+     * recommendation results, pass
+     * [PredictResponse.attribution_token][google.cloud.retail.v2.PredictResponse.attribution_token]
+     * as a URL parameter to product K's page. When recording events on product
+     * K's page, log the
+     * [PredictResponse.attribution_token][google.cloud.retail.v2.PredictResponse.attribution_token]
+     * to this field.
+     * </pre>
+     *
+     * <code>string attribution_token = 5;</code>
+     *
+     * @param value The bytes for attributionToken to set.
+     * @return This builder for chaining.
+     */
+    public Builder setAttributionTokenBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+
+      attributionToken_ = value;
+      onChanged();
+      return this;
+    }
+
+    private java.util.List<com.google.cloud.retail.v2.ProductDetail> productDetails_ =
+        java.util.Collections.emptyList();
+
+    private void ensureProductDetailsIsMutable() {
+      if (!((bitField0_ & 0x00000002) != 0)) {
+        productDetails_ =
+            new java.util.ArrayList<com.google.cloud.retail.v2.ProductDetail>(productDetails_);
+        bitField0_ |= 0x00000002;
+      }
+    }
+
+    private com.google.protobuf.RepeatedFieldBuilderV3<
+            com.google.cloud.retail.v2.ProductDetail,
+            com.google.cloud.retail.v2.ProductDetail.Builder,
+            com.google.cloud.retail.v2.ProductDetailOrBuilder>
+        productDetailsBuilder_;
+
+    /**
+     *
+     *
+     * <pre>
+     * The main product details related to the event.
+     * This field is required for the following event types:
+     * * `add-to-cart`
+     * * `detail-page-view`
+     * * `purchase-complete`
+     * In a `search` event, this field represents the products returned to the end
+     * user on the current page (the end user may have not finished broswing the
+     * whole page yet). When a new page is returned to the end user, after
+     * pagination/filtering/ordering even for the same query, a new `search` event
+     * with different
+     * [product_details][google.cloud.retail.v2.UserEvent.product_details] is
+     * desired. The end user may have not finished broswing the whole page yet.
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.ProductDetail product_details = 6;</code>
+     */
+    public java.util.List<com.google.cloud.retail.v2.ProductDetail> getProductDetailsList() {
+      if (productDetailsBuilder_ == null) {
+        return java.util.Collections.unmodifiableList(productDetails_);
+      } else {
+        return productDetailsBuilder_.getMessageList();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The main product details related to the event.
+     * This field is required for the following event types:
+     * * `add-to-cart`
+     * * `detail-page-view`
+     * * `purchase-complete`
+     * In a `search` event, this field represents the products returned to the end
+     * user on the current page (the end user may have not finished broswing the
+     * whole page yet). When a new page is returned to the end user, after
+     * pagination/filtering/ordering even for the same query, a new `search` event
+     * with different
+     * [product_details][google.cloud.retail.v2.UserEvent.product_details] is
+     * desired. The end user may have not finished broswing the whole page yet.
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.ProductDetail product_details = 6;</code>
+     */
+    public int getProductDetailsCount() {
+      if (productDetailsBuilder_ == null) {
+        return productDetails_.size();
+      } else {
+        return productDetailsBuilder_.getCount();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The main product details related to the event.
+     * This field is required for the following event types:
+     * * `add-to-cart`
+     * * `detail-page-view`
+     * * `purchase-complete`
+     * In a `search` event, this field represents the products returned to the end
+     * user on the current page (the end user may have not finished broswing the
+     * whole page yet). When a new page is returned to the end user, after
+     * pagination/filtering/ordering even for the same query, a new `search` event
+     * with different
+     * [product_details][google.cloud.retail.v2.UserEvent.product_details] is
+     * desired. The end user may have not finished broswing the whole page yet.
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.ProductDetail product_details = 6;</code>
+     */
+    public com.google.cloud.retail.v2.ProductDetail getProductDetails(int index) {
+      if (productDetailsBuilder_ == null) {
+        return productDetails_.get(index);
+      } else {
+        return productDetailsBuilder_.getMessage(index);
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The main product details related to the event.
+     * This field is required for the following event types:
+     * * `add-to-cart`
+     * * `detail-page-view`
+     * * `purchase-complete`
+     * In a `search` event, this field represents the products returned to the end
+     * user on the current page (the end user may have not finished broswing the
+     * whole page yet). When a new page is returned to the end user, after
+     * pagination/filtering/ordering even for the same query, a new `search` event
+     * with different
+     * [product_details][google.cloud.retail.v2.UserEvent.product_details] is
+     * desired. The end user may have not finished broswing the whole page yet.
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.ProductDetail product_details = 6;</code>
+     */
+    public Builder setProductDetails(int index, com.google.cloud.retail.v2.ProductDetail value) {
+      if (productDetailsBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        ensureProductDetailsIsMutable();
+        productDetails_.set(index, value);
+        onChanged();
+      } else {
+        productDetailsBuilder_.setMessage(index, value);
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The main product details related to the event.
+     * This field is required for the following event types:
+     * * `add-to-cart`
+     * * `detail-page-view`
+     * * `purchase-complete`
+     * In a `search` event, this field represents the products returned to the end
+     * user on the current page (the end user may have not finished broswing the
+     * whole page yet). When a new page is returned to the end user, after
+     * pagination/filtering/ordering even for the same query, a new `search` event
+     * with different
+     * [product_details][google.cloud.retail.v2.UserEvent.product_details] is
+     * desired. The end user may have not finished broswing the whole page yet.
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.ProductDetail product_details = 6;</code>
+     */
+    public Builder setProductDetails(
+        int index, com.google.cloud.retail.v2.ProductDetail.Builder builderForValue) {
+      if (productDetailsBuilder_ == null) {
+        ensureProductDetailsIsMutable();
+        productDetails_.set(index, builderForValue.build());
+        onChanged();
+      } else {
+        productDetailsBuilder_.setMessage(index, builderForValue.build());
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The main product details related to the event.
+     * This field is required for the following event types:
+     * * `add-to-cart`
+     * * `detail-page-view`
+     * * `purchase-complete`
+     * In a `search` event, this field represents the products returned to the end
+     * user on the current page (the end user may have not finished broswing the
+     * whole page yet). When a new page is returned to the end user, after
+     * pagination/filtering/ordering even for the same query, a new `search` event
+     * with different
+     * [product_details][google.cloud.retail.v2.UserEvent.product_details] is
+     * desired. The end user may have not finished broswing the whole page yet.
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.ProductDetail product_details = 6;</code>
+     */
+    public Builder addProductDetails(com.google.cloud.retail.v2.ProductDetail value) {
+      if (productDetailsBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        ensureProductDetailsIsMutable();
+        productDetails_.add(value);
+        onChanged();
+      } else {
+        productDetailsBuilder_.addMessage(value);
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The main product details related to the event.
+     * This field is required for the following event types:
+     * * `add-to-cart`
+     * * `detail-page-view`
+     * * `purchase-complete`
+     * In a `search` event, this field represents the products returned to the end
+     * user on the current page (the end user may have not finished broswing the
+     * whole page yet). When a new page is returned to the end user, after
+     * pagination/filtering/ordering even for the same query, a new `search` event
+     * with different
+     * [product_details][google.cloud.retail.v2.UserEvent.product_details] is
+     * desired. The end user may have not finished broswing the whole page yet.
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.ProductDetail product_details = 6;</code>
+     */
+    public Builder addProductDetails(int index, com.google.cloud.retail.v2.ProductDetail value) {
+      if (productDetailsBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        ensureProductDetailsIsMutable();
+        productDetails_.add(index, value);
+        onChanged();
+      } else {
+        productDetailsBuilder_.addMessage(index, value);
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The main product details related to the event.
+     * This field is required for the following event types:
+     * * `add-to-cart`
+     * * `detail-page-view`
+     * * `purchase-complete`
+     * In a `search` event, this field represents the products returned to the end
+     * user on the current page (the end user may have not finished broswing the
+     * whole page yet). When a new page is returned to the end user, after
+     * pagination/filtering/ordering even for the same query, a new `search` event
+     * with different
+     * [product_details][google.cloud.retail.v2.UserEvent.product_details] is
+     * desired. The end user may have not finished broswing the whole page yet.
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.ProductDetail product_details = 6;</code>
+     */
+    public Builder addProductDetails(
+        com.google.cloud.retail.v2.ProductDetail.Builder builderForValue) {
+      if (productDetailsBuilder_ == null) {
+        ensureProductDetailsIsMutable();
+        productDetails_.add(builderForValue.build());
+        onChanged();
+      } else {
+        productDetailsBuilder_.addMessage(builderForValue.build());
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The main product details related to the event.
+     * This field is required for the following event types:
+     * * `add-to-cart`
+     * * `detail-page-view`
+     * * `purchase-complete`
+     * In a `search` event, this field represents the products returned to the end
+     * user on the current page (the end user may have not finished broswing the
+     * whole page yet). When a new page is returned to the end user, after
+     * pagination/filtering/ordering even for the same query, a new `search` event
+     * with different
+     * [product_details][google.cloud.retail.v2.UserEvent.product_details] is
+     * desired. The end user may have not finished broswing the whole page yet.
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.ProductDetail product_details = 6;</code>
+     */
+    public Builder addProductDetails(
+        int index, com.google.cloud.retail.v2.ProductDetail.Builder builderForValue) {
+      if (productDetailsBuilder_ == null) {
+        ensureProductDetailsIsMutable();
+        productDetails_.add(index, builderForValue.build());
+        onChanged();
+      } else {
+        productDetailsBuilder_.addMessage(index, builderForValue.build());
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The main product details related to the event.
+     * This field is required for the following event types:
+     * * `add-to-cart`
+     * * `detail-page-view`
+     * * `purchase-complete`
+     * In a `search` event, this field represents the products returned to the end
+     * user on the current page (the end user may have not finished broswing the
+     * whole page yet). When a new page is returned to the end user, after
+     * pagination/filtering/ordering even for the same query, a new `search` event
+     * with different
+     * [product_details][google.cloud.retail.v2.UserEvent.product_details] is
+     * desired. The end user may have not finished broswing the whole page yet.
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.ProductDetail product_details = 6;</code>
+     */
+    public Builder addAllProductDetails(
+        java.lang.Iterable<? extends com.google.cloud.retail.v2.ProductDetail> values) {
+      if (productDetailsBuilder_ == null) {
+        ensureProductDetailsIsMutable();
+        com.google.protobuf.AbstractMessageLite.Builder.addAll(values, productDetails_);
+        onChanged();
+      } else {
+        productDetailsBuilder_.addAllMessages(values);
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The main product details related to the event.
+     * This field is required for the following event types:
+     * * `add-to-cart`
+     * * `detail-page-view`
+     * * `purchase-complete`
+     * In a `search` event, this field represents the products returned to the end
+     * user on the current page (the end user may have not finished broswing the
+     * whole page yet). When a new page is returned to the end user, after
+     * pagination/filtering/ordering even for the same query, a new `search` event
+     * with different
+     * [product_details][google.cloud.retail.v2.UserEvent.product_details] is
+     * desired. The end user may have not finished broswing the whole page yet.
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.ProductDetail product_details = 6;</code>
+     */
+    public Builder clearProductDetails() {
+      if (productDetailsBuilder_ == null) {
+        productDetails_ = java.util.Collections.emptyList();
+        bitField0_ = (bitField0_ & ~0x00000002);
+        onChanged();
+      } else {
+        productDetailsBuilder_.clear();
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The main product details related to the event.
+     * This field is required for the following event types:
+     * * `add-to-cart`
+     * * `detail-page-view`
+     * * `purchase-complete`
+     * In a `search` event, this field represents the products returned to the end
+     * user on the current page (the end user may have not finished broswing the
+     * whole page yet). When a new page is returned to the end user, after
+     * pagination/filtering/ordering even for the same query, a new `search` event
+     * with different
+     * [product_details][google.cloud.retail.v2.UserEvent.product_details] is
+     * desired. The end user may have not finished broswing the whole page yet.
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.ProductDetail product_details = 6;</code>
+     */
+    public Builder removeProductDetails(int index) {
+      if (productDetailsBuilder_ == null) {
+        ensureProductDetailsIsMutable();
+        productDetails_.remove(index);
+        onChanged();
+      } else {
+        productDetailsBuilder_.remove(index);
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The main product details related to the event.
+     * This field is required for the following event types:
+     * * `add-to-cart`
+     * * `detail-page-view`
+     * * `purchase-complete`
+     * In a `search` event, this field represents the products returned to the end
+     * user on the current page (the end user may have not finished broswing the
+     * whole page yet). When a new page is returned to the end user, after
+     * pagination/filtering/ordering even for the same query, a new `search` event
+     * with different
+     * [product_details][google.cloud.retail.v2.UserEvent.product_details] is
+     * desired. The end user may have not finished broswing the whole page yet.
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.ProductDetail product_details = 6;</code>
+     */
+    public com.google.cloud.retail.v2.ProductDetail.Builder getProductDetailsBuilder(int index) {
+      return getProductDetailsFieldBuilder().getBuilder(index);
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The main product details related to the event.
+     * This field is required for the following event types:
+     * * `add-to-cart`
+     * * `detail-page-view`
+     * * `purchase-complete`
+     * In a `search` event, this field represents the products returned to the end
+     * user on the current page (the end user may have not finished broswing the
+     * whole page yet). When a new page is returned to the end user, after
+     * pagination/filtering/ordering even for the same query, a new `search` event
+     * with different
+     * [product_details][google.cloud.retail.v2.UserEvent.product_details] is
+     * desired. The end user may have not finished broswing the whole page yet.
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.ProductDetail product_details = 6;</code>
+     */
+    public com.google.cloud.retail.v2.ProductDetailOrBuilder getProductDetailsOrBuilder(int index) {
+      if (productDetailsBuilder_ == null) {
+        return productDetails_.get(index);
+      } else {
+        return productDetailsBuilder_.getMessageOrBuilder(index);
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The main product details related to the event.
+     * This field is required for the following event types:
+     * * `add-to-cart`
+     * * `detail-page-view`
+     * * `purchase-complete`
+     * In a `search` event, this field represents the products returned to the end
+     * user on the current page (the end user may have not finished broswing the
+     * whole page yet). When a new page is returned to the end user, after
+     * pagination/filtering/ordering even for the same query, a new `search` event
+     * with different
+     * [product_details][google.cloud.retail.v2.UserEvent.product_details] is
+     * desired. The end user may have not finished broswing the whole page yet.
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.ProductDetail product_details = 6;</code>
+     */
+    public java.util.List<? extends com.google.cloud.retail.v2.ProductDetailOrBuilder>
+        getProductDetailsOrBuilderList() {
+      if (productDetailsBuilder_ != null) {
+        return productDetailsBuilder_.getMessageOrBuilderList();
+      } else {
+        return java.util.Collections.unmodifiableList(productDetails_);
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The main product details related to the event.
+     * This field is required for the following event types:
+     * * `add-to-cart`
+     * * `detail-page-view`
+     * * `purchase-complete`
+     * In a `search` event, this field represents the products returned to the end
+     * user on the current page (the end user may have not finished broswing the
+     * whole page yet). When a new page is returned to the end user, after
+     * pagination/filtering/ordering even for the same query, a new `search` event
+     * with different
+     * [product_details][google.cloud.retail.v2.UserEvent.product_details] is
+     * desired. The end user may have not finished broswing the whole page yet.
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.ProductDetail product_details = 6;</code>
+     */
+    public com.google.cloud.retail.v2.ProductDetail.Builder addProductDetailsBuilder() {
+      return getProductDetailsFieldBuilder()
+          .addBuilder(com.google.cloud.retail.v2.ProductDetail.getDefaultInstance());
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The main product details related to the event.
+     * This field is required for the following event types:
+     * * `add-to-cart`
+     * * `detail-page-view`
+     * * `purchase-complete`
+     * In a `search` event, this field represents the products returned to the end
+     * user on the current page (the end user may have not finished broswing the
+     * whole page yet). When a new page is returned to the end user, after
+     * pagination/filtering/ordering even for the same query, a new `search` event
+     * with different
+     * [product_details][google.cloud.retail.v2.UserEvent.product_details] is
+     * desired. The end user may have not finished broswing the whole page yet.
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.ProductDetail product_details = 6;</code>
+     */
+    public com.google.cloud.retail.v2.ProductDetail.Builder addProductDetailsBuilder(int index) {
+      return getProductDetailsFieldBuilder()
+          .addBuilder(index, com.google.cloud.retail.v2.ProductDetail.getDefaultInstance());
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The main product details related to the event.
+     * This field is required for the following event types:
+     * * `add-to-cart`
+     * * `detail-page-view`
+     * * `purchase-complete`
+     * In a `search` event, this field represents the products returned to the end
+     * user on the current page (the end user may have not finished broswing the
+     * whole page yet). When a new page is returned to the end user, after
+     * pagination/filtering/ordering even for the same query, a new `search` event
+     * with different
+     * [product_details][google.cloud.retail.v2.UserEvent.product_details] is
+     * desired. The end user may have not finished broswing the whole page yet.
+     * </pre>
+     *
+     * <code>repeated .google.cloud.retail.v2.ProductDetail product_details = 6;</code>
+     */
+    public java.util.List<com.google.cloud.retail.v2.ProductDetail.Builder>
+        getProductDetailsBuilderList() {
+      return getProductDetailsFieldBuilder().getBuilderList();
+    }
+
+    private com.google.protobuf.RepeatedFieldBuilderV3<
+            com.google.cloud.retail.v2.ProductDetail,
+            com.google.cloud.retail.v2.ProductDetail.Builder,
+            com.google.cloud.retail.v2.ProductDetailOrBuilder>
+        getProductDetailsFieldBuilder() {
+      if (productDetailsBuilder_ == null) {
+        productDetailsBuilder_ =
+            new com.google.protobuf.RepeatedFieldBuilderV3<
+                com.google.cloud.retail.v2.ProductDetail,
+                com.google.cloud.retail.v2.ProductDetail.Builder,
+                com.google.cloud.retail.v2.ProductDetailOrBuilder>(
+                productDetails_,
+                ((bitField0_ & 0x00000002) != 0),
+                getParentForChildren(),
+                isClean());
+        productDetails_ = null;
+      }
+      return productDetailsBuilder_;
+    }
+
+    private com.google.protobuf.MapField<
+            java.lang.String, com.google.cloud.retail.v2.CustomAttribute>
+        attributes_;
+
+    private com.google.protobuf.MapField<
+            java.lang.String, com.google.cloud.retail.v2.CustomAttribute>
+        internalGetAttributes() {
+      if (attributes_ == null) {
+        return com.google.protobuf.MapField.emptyMapField(
+            AttributesDefaultEntryHolder.defaultEntry);
+      }
+      return attributes_;
+    }
+
+    private com.google.protobuf.MapField<
+            java.lang.String, com.google.cloud.retail.v2.CustomAttribute>
+        internalGetMutableAttributes() {
+      onChanged();
+      ;
+      if (attributes_ == null) {
+        attributes_ =
+            com.google.protobuf.MapField.newMapField(AttributesDefaultEntryHolder.defaultEntry);
+      }
+      if (!attributes_.isMutable()) {
+        attributes_ = attributes_.copy();
+      }
+      return attributes_;
+    }
+
+    public int getAttributesCount() {
+      return internalGetAttributes().getMap().size();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Extra user event features to include in the recommendation model.
+     * The key must be a UTF-8 encoded string with a length limit of 5,000
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * For product recommendation, an example of extra user information is
+     * traffic_channel, i.e. how user arrives at the site. Users can arrive
+     * at the site by coming to the site directly, or coming through Google
+     * search, and etc.
+     * </pre>
+     *
+     * <code>map&lt;string, .google.cloud.retail.v2.CustomAttribute&gt; attributes = 7;</code>
+     */
+    @java.lang.Override
+    public boolean containsAttributes(java.lang.String key) {
+      if (key == null) {
+        throw new java.lang.NullPointerException();
+      }
+      return internalGetAttributes().getMap().containsKey(key);
+    }
+    /** Use {@link #getAttributesMap()} instead. */
+    @java.lang.Override
+    @java.lang.Deprecated
+    public java.util.Map<java.lang.String, com.google.cloud.retail.v2.CustomAttribute>
+        getAttributes() {
+      return getAttributesMap();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Extra user event features to include in the recommendation model.
+     * The key must be a UTF-8 encoded string with a length limit of 5,000
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * For product recommendation, an example of extra user information is
+     * traffic_channel, i.e. how user arrives at the site. Users can arrive
+     * at the site by coming to the site directly, or coming through Google
+     * search, and etc.
+     * </pre>
+     *
+     * <code>map&lt;string, .google.cloud.retail.v2.CustomAttribute&gt; attributes = 7;</code>
+     */
+    @java.lang.Override
+    public java.util.Map<java.lang.String, com.google.cloud.retail.v2.CustomAttribute>
+        getAttributesMap() {
+      return internalGetAttributes().getMap();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Extra user event features to include in the recommendation model.
+     * The key must be a UTF-8 encoded string with a length limit of 5,000
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * For product recommendation, an example of extra user information is
+     * traffic_channel, i.e. how user arrives at the site. Users can arrive
+     * at the site by coming to the site directly, or coming through Google
+     * search, and etc.
+     * </pre>
+     *
+     * <code>map&lt;string, .google.cloud.retail.v2.CustomAttribute&gt; attributes = 7;</code>
+     */
+    @java.lang.Override
+    public com.google.cloud.retail.v2.CustomAttribute getAttributesOrDefault(
+        java.lang.String key, com.google.cloud.retail.v2.CustomAttribute defaultValue) {
+      if (key == null) {
+        throw new java.lang.NullPointerException();
+      }
+      java.util.Map<java.lang.String, com.google.cloud.retail.v2.CustomAttribute> map =
+          internalGetAttributes().getMap();
+      return map.containsKey(key) ? map.get(key) : defaultValue;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Extra user event features to include in the recommendation model.
+     * The key must be a UTF-8 encoded string with a length limit of 5,000
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * For product recommendation, an example of extra user information is
+     * traffic_channel, i.e. how user arrives at the site. Users can arrive
+     * at the site by coming to the site directly, or coming through Google
+     * search, and etc.
+     * </pre>
+     *
+     * <code>map&lt;string, .google.cloud.retail.v2.CustomAttribute&gt; attributes = 7;</code>
+     */
+    @java.lang.Override
+    public com.google.cloud.retail.v2.CustomAttribute getAttributesOrThrow(java.lang.String key) {
+      if (key == null) {
+        throw new java.lang.NullPointerException();
+      }
+      java.util.Map<java.lang.String, com.google.cloud.retail.v2.CustomAttribute> map =
+          internalGetAttributes().getMap();
+      if (!map.containsKey(key)) {
+        throw new java.lang.IllegalArgumentException();
+      }
+      return map.get(key);
+    }
+
+    public Builder clearAttributes() {
+      internalGetMutableAttributes().getMutableMap().clear();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Extra user event features to include in the recommendation model.
+     * The key must be a UTF-8 encoded string with a length limit of 5,000
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * For product recommendation, an example of extra user information is
+     * traffic_channel, i.e. how user arrives at the site. Users can arrive
+     * at the site by coming to the site directly, or coming through Google
+     * search, and etc.
+     * </pre>
+     *
+     * <code>map&lt;string, .google.cloud.retail.v2.CustomAttribute&gt; attributes = 7;</code>
+     */
+    public Builder removeAttributes(java.lang.String key) {
+      if (key == null) {
+        throw new java.lang.NullPointerException();
+      }
+      internalGetMutableAttributes().getMutableMap().remove(key);
+      return this;
+    }
+    /** Use alternate mutation accessors instead. */
+    @java.lang.Deprecated
+    public java.util.Map<java.lang.String, com.google.cloud.retail.v2.CustomAttribute>
+        getMutableAttributes() {
+      return internalGetMutableAttributes().getMutableMap();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Extra user event features to include in the recommendation model.
+     * The key must be a UTF-8 encoded string with a length limit of 5,000
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * For product recommendation, an example of extra user information is
+     * traffic_channel, i.e. how user arrives at the site. Users can arrive
+     * at the site by coming to the site directly, or coming through Google
+     * search, and etc.
+     * </pre>
+     *
+     * <code>map&lt;string, .google.cloud.retail.v2.CustomAttribute&gt; attributes = 7;</code>
+     */
+    public Builder putAttributes(
+        java.lang.String key, com.google.cloud.retail.v2.CustomAttribute value) {
+      if (key == null) {
+        throw new java.lang.NullPointerException();
+      }
+      if (value == null) {
+        throw new java.lang.NullPointerException();
+      }
+      internalGetMutableAttributes().getMutableMap().put(key, value);
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Extra user event features to include in the recommendation model.
+     * The key must be a UTF-8 encoded string with a length limit of 5,000
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * For product recommendation, an example of extra user information is
+     * traffic_channel, i.e. how user arrives at the site. Users can arrive
+     * at the site by coming to the site directly, or coming through Google
+     * search, and etc.
+     * </pre>
+     *
+     * <code>map&lt;string, .google.cloud.retail.v2.CustomAttribute&gt; attributes = 7;</code>
+     */
+    public Builder putAllAttributes(
+        java.util.Map<java.lang.String, com.google.cloud.retail.v2.CustomAttribute> values) {
+      internalGetMutableAttributes().getMutableMap().putAll(values);
+      return this;
+    }
+
+    private java.lang.Object cartId_ = "";
+    /**
+     *
+     *
+     * <pre>
+     * The id or name of the associated shopping cart. This id is used
+     * to associate multiple items added or present in the cart before purchase.
+     * This can only be set for `add-to-cart`, `purchase-complete`, or
+     * `shopping-cart-page-view` events.
+     * </pre>
+     *
+     * <code>string cart_id = 8;</code>
+     *
+     * @return The cartId.
+     */
+    public java.lang.String getCartId() {
+      java.lang.Object ref = cartId_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        cartId_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The id or name of the associated shopping cart. This id is used
+     * to associate multiple items added or present in the cart before purchase.
+     * This can only be set for `add-to-cart`, `purchase-complete`, or
+     * `shopping-cart-page-view` events.
+     * </pre>
+     *
+     * <code>string cart_id = 8;</code>
+     *
+     * @return The bytes for cartId.
+     */
+    public com.google.protobuf.ByteString getCartIdBytes() {
+      java.lang.Object ref = cartId_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b =
+            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+        cartId_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The id or name of the associated shopping cart. This id is used
+     * to associate multiple items added or present in the cart before purchase.
+     * This can only be set for `add-to-cart`, `purchase-complete`, or
+     * `shopping-cart-page-view` events.
+     * </pre>
+     *
+     * <code>string cart_id = 8;</code>
+     *
+     * @param value The cartId to set.
+     * @return This builder for chaining.
+     */
+    public Builder setCartId(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+
+      cartId_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The id or name of the associated shopping cart. This id is used
+     * to associate multiple items added or present in the cart before purchase.
+     * This can only be set for `add-to-cart`, `purchase-complete`, or
+     * `shopping-cart-page-view` events.
+     * </pre>
+     *
+     * <code>string cart_id = 8;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearCartId() {
+
+      cartId_ = getDefaultInstance().getCartId();
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The id or name of the associated shopping cart. This id is used
+     * to associate multiple items added or present in the cart before purchase.
+     * This can only be set for `add-to-cart`, `purchase-complete`, or
+     * `shopping-cart-page-view` events.
+     * </pre>
+     *
+     * <code>string cart_id = 8;</code>
+     *
+     * @param value The bytes for cartId to set.
+     * @return This builder for chaining.
+     */
+    public Builder setCartIdBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+
+      cartId_ = value;
+      onChanged();
+      return this;
+    }
+
+    private com.google.cloud.retail.v2.PurchaseTransaction purchaseTransaction_;
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.cloud.retail.v2.PurchaseTransaction,
+            com.google.cloud.retail.v2.PurchaseTransaction.Builder,
+            com.google.cloud.retail.v2.PurchaseTransactionOrBuilder>
+        purchaseTransactionBuilder_;
+    /**
+     *
+     *
+     * <pre>
+     * A transaction represents the entire purchase transaction.
+     * Required for `purchase-complete` events. Other event types should not set
+     * this field. Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.PurchaseTransaction purchase_transaction = 9;</code>
+     *
+     * @return Whether the purchaseTransaction field is set.
+     */
+    public boolean hasPurchaseTransaction() {
+      return purchaseTransactionBuilder_ != null || purchaseTransaction_ != null;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A transaction represents the entire purchase transaction.
+     * Required for `purchase-complete` events. Other event types should not set
+     * this field. Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.PurchaseTransaction purchase_transaction = 9;</code>
+     *
+     * @return The purchaseTransaction.
+     */
+    public com.google.cloud.retail.v2.PurchaseTransaction getPurchaseTransaction() {
+      if (purchaseTransactionBuilder_ == null) {
+        return purchaseTransaction_ == null
+            ? com.google.cloud.retail.v2.PurchaseTransaction.getDefaultInstance()
+            : purchaseTransaction_;
+      } else {
+        return purchaseTransactionBuilder_.getMessage();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A transaction represents the entire purchase transaction.
+     * Required for `purchase-complete` events. Other event types should not set
+     * this field. Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.PurchaseTransaction purchase_transaction = 9;</code>
+     */
+    public Builder setPurchaseTransaction(com.google.cloud.retail.v2.PurchaseTransaction value) {
+      if (purchaseTransactionBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        purchaseTransaction_ = value;
+        onChanged();
+      } else {
+        purchaseTransactionBuilder_.setMessage(value);
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A transaction represents the entire purchase transaction.
+     * Required for `purchase-complete` events. Other event types should not set
+     * this field. Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.PurchaseTransaction purchase_transaction = 9;</code>
+     */
+    public Builder setPurchaseTransaction(
+        com.google.cloud.retail.v2.PurchaseTransaction.Builder builderForValue) {
+      if (purchaseTransactionBuilder_ == null) {
+        purchaseTransaction_ = builderForValue.build();
+        onChanged();
+      } else {
+        purchaseTransactionBuilder_.setMessage(builderForValue.build());
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A transaction represents the entire purchase transaction.
+     * Required for `purchase-complete` events. Other event types should not set
+     * this field. Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.PurchaseTransaction purchase_transaction = 9;</code>
+     */
+    public Builder mergePurchaseTransaction(com.google.cloud.retail.v2.PurchaseTransaction value) {
+      if (purchaseTransactionBuilder_ == null) {
+        if (purchaseTransaction_ != null) {
+          purchaseTransaction_ =
+              com.google.cloud.retail.v2.PurchaseTransaction.newBuilder(purchaseTransaction_)
+                  .mergeFrom(value)
+                  .buildPartial();
+        } else {
+          purchaseTransaction_ = value;
+        }
+        onChanged();
+      } else {
+        purchaseTransactionBuilder_.mergeFrom(value);
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A transaction represents the entire purchase transaction.
+     * Required for `purchase-complete` events. Other event types should not set
+     * this field. Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.PurchaseTransaction purchase_transaction = 9;</code>
+     */
+    public Builder clearPurchaseTransaction() {
+      if (purchaseTransactionBuilder_ == null) {
+        purchaseTransaction_ = null;
+        onChanged();
+      } else {
+        purchaseTransaction_ = null;
+        purchaseTransactionBuilder_ = null;
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A transaction represents the entire purchase transaction.
+     * Required for `purchase-complete` events. Other event types should not set
+     * this field. Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.PurchaseTransaction purchase_transaction = 9;</code>
+     */
+    public com.google.cloud.retail.v2.PurchaseTransaction.Builder getPurchaseTransactionBuilder() {
+
+      onChanged();
+      return getPurchaseTransactionFieldBuilder().getBuilder();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A transaction represents the entire purchase transaction.
+     * Required for `purchase-complete` events. Other event types should not set
+     * this field. Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.PurchaseTransaction purchase_transaction = 9;</code>
+     */
+    public com.google.cloud.retail.v2.PurchaseTransactionOrBuilder
+        getPurchaseTransactionOrBuilder() {
+      if (purchaseTransactionBuilder_ != null) {
+        return purchaseTransactionBuilder_.getMessageOrBuilder();
+      } else {
+        return purchaseTransaction_ == null
+            ? com.google.cloud.retail.v2.PurchaseTransaction.getDefaultInstance()
+            : purchaseTransaction_;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A transaction represents the entire purchase transaction.
+     * Required for `purchase-complete` events. Other event types should not set
+     * this field. Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.PurchaseTransaction purchase_transaction = 9;</code>
+     */
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.cloud.retail.v2.PurchaseTransaction,
+            com.google.cloud.retail.v2.PurchaseTransaction.Builder,
+            com.google.cloud.retail.v2.PurchaseTransactionOrBuilder>
+        getPurchaseTransactionFieldBuilder() {
+      if (purchaseTransactionBuilder_ == null) {
+        purchaseTransactionBuilder_ =
+            new com.google.protobuf.SingleFieldBuilderV3<
+                com.google.cloud.retail.v2.PurchaseTransaction,
+                com.google.cloud.retail.v2.PurchaseTransaction.Builder,
+                com.google.cloud.retail.v2.PurchaseTransactionOrBuilder>(
+                getPurchaseTransaction(), getParentForChildren(), isClean());
+        purchaseTransaction_ = null;
+      }
+      return purchaseTransactionBuilder_;
+    }
+
+    private java.lang.Object searchQuery_ = "";
+    /**
+     *
+     *
+     * <pre>
+     * The user's search query.
+     * The value must be a UTF-8 encoded string with a length limit of 5,000
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * Required for `search` events. Other event types should not set this field.
+     * Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>string search_query = 10;</code>
+     *
+     * @return The searchQuery.
+     */
+    public java.lang.String getSearchQuery() {
+      java.lang.Object ref = searchQuery_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        searchQuery_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The user's search query.
+     * The value must be a UTF-8 encoded string with a length limit of 5,000
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * Required for `search` events. Other event types should not set this field.
+     * Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>string search_query = 10;</code>
+     *
+     * @return The bytes for searchQuery.
+     */
+    public com.google.protobuf.ByteString getSearchQueryBytes() {
+      java.lang.Object ref = searchQuery_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b =
+            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+        searchQuery_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The user's search query.
+     * The value must be a UTF-8 encoded string with a length limit of 5,000
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * Required for `search` events. Other event types should not set this field.
+     * Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>string search_query = 10;</code>
+     *
+     * @param value The searchQuery to set.
+     * @return This builder for chaining.
+     */
+    public Builder setSearchQuery(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+
+      searchQuery_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The user's search query.
+     * The value must be a UTF-8 encoded string with a length limit of 5,000
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * Required for `search` events. Other event types should not set this field.
+     * Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>string search_query = 10;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearSearchQuery() {
+
+      searchQuery_ = getDefaultInstance().getSearchQuery();
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The user's search query.
+     * The value must be a UTF-8 encoded string with a length limit of 5,000
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * Required for `search` events. Other event types should not set this field.
+     * Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>string search_query = 10;</code>
+     *
+     * @param value The bytes for searchQuery to set.
+     * @return This builder for chaining.
+     */
+    public Builder setSearchQueryBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+
+      searchQuery_ = value;
+      onChanged();
+      return this;
+    }
+
+    private com.google.protobuf.LazyStringList pageCategories_ =
+        com.google.protobuf.LazyStringArrayList.EMPTY;
+
+    private void ensurePageCategoriesIsMutable() {
+      if (!((bitField0_ & 0x00000008) != 0)) {
+        pageCategories_ = new com.google.protobuf.LazyStringArrayList(pageCategories_);
+        bitField0_ |= 0x00000008;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The categories associated with a category page.
+     * To represent full path of category, use '&gt;' sign to separate different
+     * hierarchies. If '&gt;' is part of the category name, please replace it with
+     * other character(s).
+     * Category pages include special pages such as sales or promotions. For
+     * instance, a special sale page may have the category hierarchy:
+     * "pageCategories" : ["Sales &gt; 2017 Black Friday Deals"].
+     * Required for `category-page-view` events. Other event types should not set
+     * this field. Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>repeated string page_categories = 11;</code>
+     *
+     * @return A list containing the pageCategories.
+     */
+    public com.google.protobuf.ProtocolStringList getPageCategoriesList() {
+      return pageCategories_.getUnmodifiableView();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The categories associated with a category page.
+     * To represent full path of category, use '&gt;' sign to separate different
+     * hierarchies. If '&gt;' is part of the category name, please replace it with
+     * other character(s).
+     * Category pages include special pages such as sales or promotions. For
+     * instance, a special sale page may have the category hierarchy:
+     * "pageCategories" : ["Sales &gt; 2017 Black Friday Deals"].
+     * Required for `category-page-view` events. Other event types should not set
+     * this field. Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>repeated string page_categories = 11;</code>
+     *
+     * @return The count of pageCategories.
+     */
+    public int getPageCategoriesCount() {
+      return pageCategories_.size();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The categories associated with a category page.
+     * To represent full path of category, use '&gt;' sign to separate different
+     * hierarchies. If '&gt;' is part of the category name, please replace it with
+     * other character(s).
+     * Category pages include special pages such as sales or promotions. For
+     * instance, a special sale page may have the category hierarchy:
+     * "pageCategories" : ["Sales &gt; 2017 Black Friday Deals"].
+     * Required for `category-page-view` events. Other event types should not set
+     * this field. Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>repeated string page_categories = 11;</code>
+     *
+     * @param index The index of the element to return.
+     * @return The pageCategories at the given index.
+     */
+    public java.lang.String getPageCategories(int index) {
+      return pageCategories_.get(index);
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The categories associated with a category page.
+     * To represent full path of category, use '&gt;' sign to separate different
+     * hierarchies. If '&gt;' is part of the category name, please replace it with
+     * other character(s).
+     * Category pages include special pages such as sales or promotions. For
+     * instance, a special sale page may have the category hierarchy:
+     * "pageCategories" : ["Sales &gt; 2017 Black Friday Deals"].
+     * Required for `category-page-view` events. Other event types should not set
+     * this field. Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>repeated string page_categories = 11;</code>
+     *
+     * @param index The index of the value to return.
+     * @return The bytes of the pageCategories at the given index.
+     */
+    public com.google.protobuf.ByteString getPageCategoriesBytes(int index) {
+      return pageCategories_.getByteString(index);
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The categories associated with a category page.
+     * To represent full path of category, use '&gt;' sign to separate different
+     * hierarchies. If '&gt;' is part of the category name, please replace it with
+     * other character(s).
+     * Category pages include special pages such as sales or promotions. For
+     * instance, a special sale page may have the category hierarchy:
+     * "pageCategories" : ["Sales &gt; 2017 Black Friday Deals"].
+     * Required for `category-page-view` events. Other event types should not set
+     * this field. Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>repeated string page_categories = 11;</code>
+     *
+     * @param index The index to set the value at.
+     * @param value The pageCategories to set.
+     * @return This builder for chaining.
+     */
+    public Builder setPageCategories(int index, java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      ensurePageCategoriesIsMutable();
+      pageCategories_.set(index, value);
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The categories associated with a category page.
+     * To represent full path of category, use '&gt;' sign to separate different
+     * hierarchies. If '&gt;' is part of the category name, please replace it with
+     * other character(s).
+     * Category pages include special pages such as sales or promotions. For
+     * instance, a special sale page may have the category hierarchy:
+     * "pageCategories" : ["Sales &gt; 2017 Black Friday Deals"].
+     * Required for `category-page-view` events. Other event types should not set
+     * this field. Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>repeated string page_categories = 11;</code>
+     *
+     * @param value The pageCategories to add.
+     * @return This builder for chaining.
+     */
+    public Builder addPageCategories(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      ensurePageCategoriesIsMutable();
+      pageCategories_.add(value);
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The categories associated with a category page.
+     * To represent full path of category, use '&gt;' sign to separate different
+     * hierarchies. If '&gt;' is part of the category name, please replace it with
+     * other character(s).
+     * Category pages include special pages such as sales or promotions. For
+     * instance, a special sale page may have the category hierarchy:
+     * "pageCategories" : ["Sales &gt; 2017 Black Friday Deals"].
+     * Required for `category-page-view` events. Other event types should not set
+     * this field. Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>repeated string page_categories = 11;</code>
+     *
+     * @param values The pageCategories to add.
+     * @return This builder for chaining.
+     */
+    public Builder addAllPageCategories(java.lang.Iterable<java.lang.String> values) {
+      ensurePageCategoriesIsMutable();
+      com.google.protobuf.AbstractMessageLite.Builder.addAll(values, pageCategories_);
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The categories associated with a category page.
+     * To represent full path of category, use '&gt;' sign to separate different
+     * hierarchies. If '&gt;' is part of the category name, please replace it with
+     * other character(s).
+     * Category pages include special pages such as sales or promotions. For
+     * instance, a special sale page may have the category hierarchy:
+     * "pageCategories" : ["Sales &gt; 2017 Black Friday Deals"].
+     * Required for `category-page-view` events. Other event types should not set
+     * this field. Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>repeated string page_categories = 11;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearPageCategories() {
+      pageCategories_ = com.google.protobuf.LazyStringArrayList.EMPTY;
+      bitField0_ = (bitField0_ & ~0x00000008);
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The categories associated with a category page.
+     * To represent full path of category, use '&gt;' sign to separate different
+     * hierarchies. If '&gt;' is part of the category name, please replace it with
+     * other character(s).
+     * Category pages include special pages such as sales or promotions. For
+     * instance, a special sale page may have the category hierarchy:
+     * "pageCategories" : ["Sales &gt; 2017 Black Friday Deals"].
+     * Required for `category-page-view` events. Other event types should not set
+     * this field. Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>repeated string page_categories = 11;</code>
+     *
+     * @param value The bytes of the pageCategories to add.
+     * @return This builder for chaining.
+     */
+    public Builder addPageCategoriesBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+      ensurePageCategoriesIsMutable();
+      pageCategories_.add(value);
+      onChanged();
+      return this;
+    }
+
+    private com.google.cloud.retail.v2.UserInfo userInfo_;
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.cloud.retail.v2.UserInfo,
+            com.google.cloud.retail.v2.UserInfo.Builder,
+            com.google.cloud.retail.v2.UserInfoOrBuilder>
+        userInfoBuilder_;
+    /**
+     *
+     *
+     * <pre>
+     * User information.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.UserInfo user_info = 12;</code>
+     *
+     * @return Whether the userInfo field is set.
+     */
+    public boolean hasUserInfo() {
+      return userInfoBuilder_ != null || userInfo_ != null;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * User information.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.UserInfo user_info = 12;</code>
+     *
+     * @return The userInfo.
+     */
+    public com.google.cloud.retail.v2.UserInfo getUserInfo() {
+      if (userInfoBuilder_ == null) {
+        return userInfo_ == null
+            ? com.google.cloud.retail.v2.UserInfo.getDefaultInstance()
+            : userInfo_;
+      } else {
+        return userInfoBuilder_.getMessage();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * User information.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.UserInfo user_info = 12;</code>
+     */
+    public Builder setUserInfo(com.google.cloud.retail.v2.UserInfo value) {
+      if (userInfoBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        userInfo_ = value;
+        onChanged();
+      } else {
+        userInfoBuilder_.setMessage(value);
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * User information.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.UserInfo user_info = 12;</code>
+     */
+    public Builder setUserInfo(com.google.cloud.retail.v2.UserInfo.Builder builderForValue) {
+      if (userInfoBuilder_ == null) {
+        userInfo_ = builderForValue.build();
+        onChanged();
+      } else {
+        userInfoBuilder_.setMessage(builderForValue.build());
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * User information.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.UserInfo user_info = 12;</code>
+     */
+    public Builder mergeUserInfo(com.google.cloud.retail.v2.UserInfo value) {
+      if (userInfoBuilder_ == null) {
+        if (userInfo_ != null) {
+          userInfo_ =
+              com.google.cloud.retail.v2.UserInfo.newBuilder(userInfo_)
+                  .mergeFrom(value)
+                  .buildPartial();
+        } else {
+          userInfo_ = value;
+        }
+        onChanged();
+      } else {
+        userInfoBuilder_.mergeFrom(value);
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * User information.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.UserInfo user_info = 12;</code>
+     */
+    public Builder clearUserInfo() {
+      if (userInfoBuilder_ == null) {
+        userInfo_ = null;
+        onChanged();
+      } else {
+        userInfo_ = null;
+        userInfoBuilder_ = null;
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * User information.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.UserInfo user_info = 12;</code>
+     */
+    public com.google.cloud.retail.v2.UserInfo.Builder getUserInfoBuilder() {
+
+      onChanged();
+      return getUserInfoFieldBuilder().getBuilder();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * User information.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.UserInfo user_info = 12;</code>
+     */
+    public com.google.cloud.retail.v2.UserInfoOrBuilder getUserInfoOrBuilder() {
+      if (userInfoBuilder_ != null) {
+        return userInfoBuilder_.getMessageOrBuilder();
+      } else {
+        return userInfo_ == null
+            ? com.google.cloud.retail.v2.UserInfo.getDefaultInstance()
+            : userInfo_;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * User information.
+     * </pre>
+     *
+     * <code>.google.cloud.retail.v2.UserInfo user_info = 12;</code>
+     */
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.cloud.retail.v2.UserInfo,
+            com.google.cloud.retail.v2.UserInfo.Builder,
+            com.google.cloud.retail.v2.UserInfoOrBuilder>
+        getUserInfoFieldBuilder() {
+      if (userInfoBuilder_ == null) {
+        userInfoBuilder_ =
+            new com.google.protobuf.SingleFieldBuilderV3<
+                com.google.cloud.retail.v2.UserInfo,
+                com.google.cloud.retail.v2.UserInfo.Builder,
+                com.google.cloud.retail.v2.UserInfoOrBuilder>(
+                getUserInfo(), getParentForChildren(), isClean());
+        userInfo_ = null;
+      }
+      return userInfoBuilder_;
+    }
+
+    private java.lang.Object uri_ = "";
+    /**
+     *
+     *
+     * <pre>
+     * Complete URL (window.location.href) of the user's current page.
+     * When using the client side event reporting with JavaScript pixel and Google
+     * Tag Manager, this value is filled in automatically. Maximum length 5,000
+     * characters.
+     * </pre>
+     *
+     * <code>string uri = 13;</code>
+     *
+     * @return The uri.
+     */
+    public java.lang.String getUri() {
+      java.lang.Object ref = uri_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        uri_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Complete URL (window.location.href) of the user's current page.
+     * When using the client side event reporting with JavaScript pixel and Google
+     * Tag Manager, this value is filled in automatically. Maximum length 5,000
+     * characters.
+     * </pre>
+     *
+     * <code>string uri = 13;</code>
+     *
+     * @return The bytes for uri.
+     */
+    public com.google.protobuf.ByteString getUriBytes() {
+      java.lang.Object ref = uri_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b =
+            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+        uri_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Complete URL (window.location.href) of the user's current page.
+     * When using the client side event reporting with JavaScript pixel and Google
+     * Tag Manager, this value is filled in automatically. Maximum length 5,000
+     * characters.
+     * </pre>
+     *
+     * <code>string uri = 13;</code>
+     *
+     * @param value The uri to set.
+     * @return This builder for chaining.
+     */
+    public Builder setUri(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+
+      uri_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Complete URL (window.location.href) of the user's current page.
+     * When using the client side event reporting with JavaScript pixel and Google
+     * Tag Manager, this value is filled in automatically. Maximum length 5,000
+     * characters.
+     * </pre>
+     *
+     * <code>string uri = 13;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearUri() {
+
+      uri_ = getDefaultInstance().getUri();
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Complete URL (window.location.href) of the user's current page.
+     * When using the client side event reporting with JavaScript pixel and Google
+     * Tag Manager, this value is filled in automatically. Maximum length 5,000
+     * characters.
+     * </pre>
+     *
+     * <code>string uri = 13;</code>
+     *
+     * @param value The bytes for uri to set.
+     * @return This builder for chaining.
+     */
+    public Builder setUriBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+
+      uri_ = value;
+      onChanged();
+      return this;
+    }
+
+    private java.lang.Object referrerUri_ = "";
+    /**
+     *
+     *
+     * <pre>
+     * The referrer URL of the current page.
+     * When using the client side event reporting with JavaScript pixel and Google
+     * Tag Manager, this value is filled in automatically.
+     * </pre>
+     *
+     * <code>string referrer_uri = 14;</code>
+     *
+     * @return The referrerUri.
+     */
+    public java.lang.String getReferrerUri() {
+      java.lang.Object ref = referrerUri_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        referrerUri_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The referrer URL of the current page.
+     * When using the client side event reporting with JavaScript pixel and Google
+     * Tag Manager, this value is filled in automatically.
+     * </pre>
+     *
+     * <code>string referrer_uri = 14;</code>
+     *
+     * @return The bytes for referrerUri.
+     */
+    public com.google.protobuf.ByteString getReferrerUriBytes() {
+      java.lang.Object ref = referrerUri_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b =
+            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+        referrerUri_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The referrer URL of the current page.
+     * When using the client side event reporting with JavaScript pixel and Google
+     * Tag Manager, this value is filled in automatically.
+     * </pre>
+     *
+     * <code>string referrer_uri = 14;</code>
+     *
+     * @param value The referrerUri to set.
+     * @return This builder for chaining.
+     */
+    public Builder setReferrerUri(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+
+      referrerUri_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The referrer URL of the current page.
+     * When using the client side event reporting with JavaScript pixel and Google
+     * Tag Manager, this value is filled in automatically.
+     * </pre>
+     *
+     * <code>string referrer_uri = 14;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearReferrerUri() {
+
+      referrerUri_ = getDefaultInstance().getReferrerUri();
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The referrer URL of the current page.
+     * When using the client side event reporting with JavaScript pixel and Google
+     * Tag Manager, this value is filled in automatically.
+     * </pre>
+     *
+     * <code>string referrer_uri = 14;</code>
+     *
+     * @param value The bytes for referrerUri to set.
+     * @return This builder for chaining.
+     */
+    public Builder setReferrerUriBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+
+      referrerUri_ = value;
+      onChanged();
+      return this;
+    }
+
+    private java.lang.Object pageViewId_ = "";
+    /**
+     *
+     *
+     * <pre>
+     * A unique id of a web page view.
+     * This should be kept the same for all user events triggered from the same
+     * pageview. For example, an item detail page view could trigger multiple
+     * events as the user is browsing the page. The `pageViewId` property should
+     * be kept the same for all these events so that they can be grouped together
+     * properly.
+     * When using the client side event reporting with JavaScript pixel and Google
+     * Tag Manager, this value is filled in automatically.
+     * </pre>
+     *
+     * <code>string page_view_id = 15;</code>
+     *
+     * @return The pageViewId.
+     */
+    public java.lang.String getPageViewId() {
+      java.lang.Object ref = pageViewId_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        pageViewId_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A unique id of a web page view.
+     * This should be kept the same for all user events triggered from the same
+     * pageview. For example, an item detail page view could trigger multiple
+     * events as the user is browsing the page. The `pageViewId` property should
+     * be kept the same for all these events so that they can be grouped together
+     * properly.
+     * When using the client side event reporting with JavaScript pixel and Google
+     * Tag Manager, this value is filled in automatically.
+     * </pre>
+     *
+     * <code>string page_view_id = 15;</code>
+     *
+     * @return The bytes for pageViewId.
+     */
+    public com.google.protobuf.ByteString getPageViewIdBytes() {
+      java.lang.Object ref = pageViewId_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b =
+            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+        pageViewId_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A unique id of a web page view.
+     * This should be kept the same for all user events triggered from the same
+     * pageview. For example, an item detail page view could trigger multiple
+     * events as the user is browsing the page. The `pageViewId` property should
+     * be kept the same for all these events so that they can be grouped together
+     * properly.
+     * When using the client side event reporting with JavaScript pixel and Google
+     * Tag Manager, this value is filled in automatically.
+     * </pre>
+     *
+     * <code>string page_view_id = 15;</code>
+     *
+     * @param value The pageViewId to set.
+     * @return This builder for chaining.
+     */
+    public Builder setPageViewId(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+
+      pageViewId_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A unique id of a web page view.
+     * This should be kept the same for all user events triggered from the same
+     * pageview. For example, an item detail page view could trigger multiple
+     * events as the user is browsing the page. The `pageViewId` property should
+     * be kept the same for all these events so that they can be grouped together
+     * properly.
+     * When using the client side event reporting with JavaScript pixel and Google
+     * Tag Manager, this value is filled in automatically.
+     * </pre>
+     *
+     * <code>string page_view_id = 15;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearPageViewId() {
+
+      pageViewId_ = getDefaultInstance().getPageViewId();
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * A unique id of a web page view.
+     * This should be kept the same for all user events triggered from the same
+     * pageview. For example, an item detail page view could trigger multiple
+     * events as the user is browsing the page. The `pageViewId` property should
+     * be kept the same for all these events so that they can be grouped together
+     * properly.
+     * When using the client side event reporting with JavaScript pixel and Google
+     * Tag Manager, this value is filled in automatically.
+     * </pre>
+     *
+     * <code>string page_view_id = 15;</code>
+     *
+     * @param value The bytes for pageViewId to set.
+     * @return This builder for chaining.
+     */
+    public Builder setPageViewIdBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+
+      pageViewId_ = value;
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.setUnknownFields(unknownFields);
+    }
+
+    @java.lang.Override
+    public final Builder mergeUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.mergeUnknownFields(unknownFields);
+    }
+
+    // @@protoc_insertion_point(builder_scope:google.cloud.retail.v2.UserEvent)
+  }
+
+  // @@protoc_insertion_point(class_scope:google.cloud.retail.v2.UserEvent)
+  private static final com.google.cloud.retail.v2.UserEvent DEFAULT_INSTANCE;
+
+  static {
+    DEFAULT_INSTANCE = new com.google.cloud.retail.v2.UserEvent();
+  }
+
+  public static com.google.cloud.retail.v2.UserEvent getDefaultInstance() {
+    return DEFAULT_INSTANCE;
+  }
+
+  private static final com.google.protobuf.Parser<UserEvent> PARSER =
+      new com.google.protobuf.AbstractParser<UserEvent>() {
+        @java.lang.Override
+        public UserEvent parsePartialFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws com.google.protobuf.InvalidProtocolBufferException {
+          return new UserEvent(input, extensionRegistry);
+        }
+      };
+
+  public static com.google.protobuf.Parser<UserEvent> parser() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.protobuf.Parser<UserEvent> getParserForType() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.cloud.retail.v2.UserEvent getDefaultInstanceForType() {
+    return DEFAULT_INSTANCE;
+  }
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/UserEventImportSummary.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/UserEventImportSummary.java
new file mode 100644
index 00000000..9c8374c0
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/UserEventImportSummary.java
@@ -0,0 +1,642 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/import_config.proto
+
+package com.google.cloud.retail.v2;
+
+/**
+ *
+ *
+ * <pre>
+ * A summary of import result. The UserEventImportSummary summarizes
+ * the import status for user events.
+ * </pre>
+ *
+ * Protobuf type {@code google.cloud.retail.v2.UserEventImportSummary}
+ */
+public final class UserEventImportSummary extends com.google.protobuf.GeneratedMessageV3
+    implements
+    // @@protoc_insertion_point(message_implements:google.cloud.retail.v2.UserEventImportSummary)
+    UserEventImportSummaryOrBuilder {
+  private static final long serialVersionUID = 0L;
+  // Use UserEventImportSummary.newBuilder() to construct.
+  private UserEventImportSummary(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+    super(builder);
+  }
+
+  private UserEventImportSummary() {}
+
+  @java.lang.Override
+  @SuppressWarnings({"unused"})
+  protected java.lang.Object newInstance(UnusedPrivateParameter unused) {
+    return new UserEventImportSummary();
+  }
+
+  @java.lang.Override
+  public final com.google.protobuf.UnknownFieldSet getUnknownFields() {
+    return this.unknownFields;
+  }
+
+  private UserEventImportSummary(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    this();
+    if (extensionRegistry == null) {
+      throw new java.lang.NullPointerException();
+    }
+    com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+        com.google.protobuf.UnknownFieldSet.newBuilder();
+    try {
+      boolean done = false;
+      while (!done) {
+        int tag = input.readTag();
+        switch (tag) {
+          case 0:
+            done = true;
+            break;
+          case 8:
+            {
+              joinedEventsCount_ = input.readInt64();
+              break;
+            }
+          case 16:
+            {
+              unjoinedEventsCount_ = input.readInt64();
+              break;
+            }
+          default:
+            {
+              if (!parseUnknownField(input, unknownFields, extensionRegistry, tag)) {
+                done = true;
+              }
+              break;
+            }
+        }
+      }
+    } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+      throw e.setUnfinishedMessage(this);
+    } catch (java.io.IOException e) {
+      throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
+    } finally {
+      this.unknownFields = unknownFields.build();
+      makeExtensionsImmutable();
+    }
+  }
+
+  public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+    return com.google.cloud.retail.v2.ImportConfigProto
+        .internal_static_google_cloud_retail_v2_UserEventImportSummary_descriptor;
+  }
+
+  @java.lang.Override
+  protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internalGetFieldAccessorTable() {
+    return com.google.cloud.retail.v2.ImportConfigProto
+        .internal_static_google_cloud_retail_v2_UserEventImportSummary_fieldAccessorTable
+        .ensureFieldAccessorsInitialized(
+            com.google.cloud.retail.v2.UserEventImportSummary.class,
+            com.google.cloud.retail.v2.UserEventImportSummary.Builder.class);
+  }
+
+  public static final int JOINED_EVENTS_COUNT_FIELD_NUMBER = 1;
+  private long joinedEventsCount_;
+  /**
+   *
+   *
+   * <pre>
+   * Count of user events imported with complete existing catalog information.
+   * </pre>
+   *
+   * <code>int64 joined_events_count = 1;</code>
+   *
+   * @return The joinedEventsCount.
+   */
+  @java.lang.Override
+  public long getJoinedEventsCount() {
+    return joinedEventsCount_;
+  }
+
+  public static final int UNJOINED_EVENTS_COUNT_FIELD_NUMBER = 2;
+  private long unjoinedEventsCount_;
+  /**
+   *
+   *
+   * <pre>
+   * Count of user events imported, but with catalog information not found
+   * in the imported catalog.
+   * </pre>
+   *
+   * <code>int64 unjoined_events_count = 2;</code>
+   *
+   * @return The unjoinedEventsCount.
+   */
+  @java.lang.Override
+  public long getUnjoinedEventsCount() {
+    return unjoinedEventsCount_;
+  }
+
+  private byte memoizedIsInitialized = -1;
+
+  @java.lang.Override
+  public final boolean isInitialized() {
+    byte isInitialized = memoizedIsInitialized;
+    if (isInitialized == 1) return true;
+    if (isInitialized == 0) return false;
+
+    memoizedIsInitialized = 1;
+    return true;
+  }
+
+  @java.lang.Override
+  public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
+    if (joinedEventsCount_ != 0L) {
+      output.writeInt64(1, joinedEventsCount_);
+    }
+    if (unjoinedEventsCount_ != 0L) {
+      output.writeInt64(2, unjoinedEventsCount_);
+    }
+    unknownFields.writeTo(output);
+  }
+
+  @java.lang.Override
+  public int getSerializedSize() {
+    int size = memoizedSize;
+    if (size != -1) return size;
+
+    size = 0;
+    if (joinedEventsCount_ != 0L) {
+      size += com.google.protobuf.CodedOutputStream.computeInt64Size(1, joinedEventsCount_);
+    }
+    if (unjoinedEventsCount_ != 0L) {
+      size += com.google.protobuf.CodedOutputStream.computeInt64Size(2, unjoinedEventsCount_);
+    }
+    size += unknownFields.getSerializedSize();
+    memoizedSize = size;
+    return size;
+  }
+
+  @java.lang.Override
+  public boolean equals(final java.lang.Object obj) {
+    if (obj == this) {
+      return true;
+    }
+    if (!(obj instanceof com.google.cloud.retail.v2.UserEventImportSummary)) {
+      return super.equals(obj);
+    }
+    com.google.cloud.retail.v2.UserEventImportSummary other =
+        (com.google.cloud.retail.v2.UserEventImportSummary) obj;
+
+    if (getJoinedEventsCount() != other.getJoinedEventsCount()) return false;
+    if (getUnjoinedEventsCount() != other.getUnjoinedEventsCount()) return false;
+    if (!unknownFields.equals(other.unknownFields)) return false;
+    return true;
+  }
+
+  @java.lang.Override
+  public int hashCode() {
+    if (memoizedHashCode != 0) {
+      return memoizedHashCode;
+    }
+    int hash = 41;
+    hash = (19 * hash) + getDescriptor().hashCode();
+    hash = (37 * hash) + JOINED_EVENTS_COUNT_FIELD_NUMBER;
+    hash = (53 * hash) + com.google.protobuf.Internal.hashLong(getJoinedEventsCount());
+    hash = (37 * hash) + UNJOINED_EVENTS_COUNT_FIELD_NUMBER;
+    hash = (53 * hash) + com.google.protobuf.Internal.hashLong(getUnjoinedEventsCount());
+    hash = (29 * hash) + unknownFields.hashCode();
+    memoizedHashCode = hash;
+    return hash;
+  }
+
+  public static com.google.cloud.retail.v2.UserEventImportSummary parseFrom(
+      java.nio.ByteBuffer data) throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.UserEventImportSummary parseFrom(
+      java.nio.ByteBuffer data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.UserEventImportSummary parseFrom(
+      com.google.protobuf.ByteString data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.UserEventImportSummary parseFrom(
+      com.google.protobuf.ByteString data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.UserEventImportSummary parseFrom(byte[] data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.UserEventImportSummary parseFrom(
+      byte[] data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.UserEventImportSummary parseFrom(
+      java.io.InputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.UserEventImportSummary parseFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.UserEventImportSummary parseDelimitedFrom(
+      java.io.InputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.UserEventImportSummary parseDelimitedFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.UserEventImportSummary parseFrom(
+      com.google.protobuf.CodedInputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.UserEventImportSummary parseFrom(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  @java.lang.Override
+  public Builder newBuilderForType() {
+    return newBuilder();
+  }
+
+  public static Builder newBuilder() {
+    return DEFAULT_INSTANCE.toBuilder();
+  }
+
+  public static Builder newBuilder(com.google.cloud.retail.v2.UserEventImportSummary prototype) {
+    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+  }
+
+  @java.lang.Override
+  public Builder toBuilder() {
+    return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
+  }
+
+  @java.lang.Override
+  protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+    Builder builder = new Builder(parent);
+    return builder;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * A summary of import result. The UserEventImportSummary summarizes
+   * the import status for user events.
+   * </pre>
+   *
+   * Protobuf type {@code google.cloud.retail.v2.UserEventImportSummary}
+   */
+  public static final class Builder extends com.google.protobuf.GeneratedMessageV3.Builder<Builder>
+      implements
+      // @@protoc_insertion_point(builder_implements:google.cloud.retail.v2.UserEventImportSummary)
+      com.google.cloud.retail.v2.UserEventImportSummaryOrBuilder {
+    public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+      return com.google.cloud.retail.v2.ImportConfigProto
+          .internal_static_google_cloud_retail_v2_UserEventImportSummary_descriptor;
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return com.google.cloud.retail.v2.ImportConfigProto
+          .internal_static_google_cloud_retail_v2_UserEventImportSummary_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              com.google.cloud.retail.v2.UserEventImportSummary.class,
+              com.google.cloud.retail.v2.UserEventImportSummary.Builder.class);
+    }
+
+    // Construct using com.google.cloud.retail.v2.UserEventImportSummary.newBuilder()
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
+
+    private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+      super(parent);
+      maybeForceBuilderInitialization();
+    }
+
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders) {}
+    }
+
+    @java.lang.Override
+    public Builder clear() {
+      super.clear();
+      joinedEventsCount_ = 0L;
+
+      unjoinedEventsCount_ = 0L;
+
+      return this;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
+      return com.google.cloud.retail.v2.ImportConfigProto
+          .internal_static_google_cloud_retail_v2_UserEventImportSummary_descriptor;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.UserEventImportSummary getDefaultInstanceForType() {
+      return com.google.cloud.retail.v2.UserEventImportSummary.getDefaultInstance();
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.UserEventImportSummary build() {
+      com.google.cloud.retail.v2.UserEventImportSummary result = buildPartial();
+      if (!result.isInitialized()) {
+        throw newUninitializedMessageException(result);
+      }
+      return result;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.UserEventImportSummary buildPartial() {
+      com.google.cloud.retail.v2.UserEventImportSummary result =
+          new com.google.cloud.retail.v2.UserEventImportSummary(this);
+      result.joinedEventsCount_ = joinedEventsCount_;
+      result.unjoinedEventsCount_ = unjoinedEventsCount_;
+      onBuilt();
+      return result;
+    }
+
+    @java.lang.Override
+    public Builder clone() {
+      return super.clone();
+    }
+
+    @java.lang.Override
+    public Builder setField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.setField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
+      return super.clearField(field);
+    }
+
+    @java.lang.Override
+    public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+      return super.clearOneof(oneof);
+    }
+
+    @java.lang.Override
+    public Builder setRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, int index, java.lang.Object value) {
+      return super.setRepeatedField(field, index, value);
+    }
+
+    @java.lang.Override
+    public Builder addRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.addRepeatedField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(com.google.protobuf.Message other) {
+      if (other instanceof com.google.cloud.retail.v2.UserEventImportSummary) {
+        return mergeFrom((com.google.cloud.retail.v2.UserEventImportSummary) other);
+      } else {
+        super.mergeFrom(other);
+        return this;
+      }
+    }
+
+    public Builder mergeFrom(com.google.cloud.retail.v2.UserEventImportSummary other) {
+      if (other == com.google.cloud.retail.v2.UserEventImportSummary.getDefaultInstance())
+        return this;
+      if (other.getJoinedEventsCount() != 0L) {
+        setJoinedEventsCount(other.getJoinedEventsCount());
+      }
+      if (other.getUnjoinedEventsCount() != 0L) {
+        setUnjoinedEventsCount(other.getUnjoinedEventsCount());
+      }
+      this.mergeUnknownFields(other.unknownFields);
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final boolean isInitialized() {
+      return true;
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      com.google.cloud.retail.v2.UserEventImportSummary parsedMessage = null;
+      try {
+        parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        parsedMessage =
+            (com.google.cloud.retail.v2.UserEventImportSummary) e.getUnfinishedMessage();
+        throw e.unwrapIOException();
+      } finally {
+        if (parsedMessage != null) {
+          mergeFrom(parsedMessage);
+        }
+      }
+      return this;
+    }
+
+    private long joinedEventsCount_;
+    /**
+     *
+     *
+     * <pre>
+     * Count of user events imported with complete existing catalog information.
+     * </pre>
+     *
+     * <code>int64 joined_events_count = 1;</code>
+     *
+     * @return The joinedEventsCount.
+     */
+    @java.lang.Override
+    public long getJoinedEventsCount() {
+      return joinedEventsCount_;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Count of user events imported with complete existing catalog information.
+     * </pre>
+     *
+     * <code>int64 joined_events_count = 1;</code>
+     *
+     * @param value The joinedEventsCount to set.
+     * @return This builder for chaining.
+     */
+    public Builder setJoinedEventsCount(long value) {
+
+      joinedEventsCount_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Count of user events imported with complete existing catalog information.
+     * </pre>
+     *
+     * <code>int64 joined_events_count = 1;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearJoinedEventsCount() {
+
+      joinedEventsCount_ = 0L;
+      onChanged();
+      return this;
+    }
+
+    private long unjoinedEventsCount_;
+    /**
+     *
+     *
+     * <pre>
+     * Count of user events imported, but with catalog information not found
+     * in the imported catalog.
+     * </pre>
+     *
+     * <code>int64 unjoined_events_count = 2;</code>
+     *
+     * @return The unjoinedEventsCount.
+     */
+    @java.lang.Override
+    public long getUnjoinedEventsCount() {
+      return unjoinedEventsCount_;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Count of user events imported, but with catalog information not found
+     * in the imported catalog.
+     * </pre>
+     *
+     * <code>int64 unjoined_events_count = 2;</code>
+     *
+     * @param value The unjoinedEventsCount to set.
+     * @return This builder for chaining.
+     */
+    public Builder setUnjoinedEventsCount(long value) {
+
+      unjoinedEventsCount_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Count of user events imported, but with catalog information not found
+     * in the imported catalog.
+     * </pre>
+     *
+     * <code>int64 unjoined_events_count = 2;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearUnjoinedEventsCount() {
+
+      unjoinedEventsCount_ = 0L;
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.setUnknownFields(unknownFields);
+    }
+
+    @java.lang.Override
+    public final Builder mergeUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.mergeUnknownFields(unknownFields);
+    }
+
+    // @@protoc_insertion_point(builder_scope:google.cloud.retail.v2.UserEventImportSummary)
+  }
+
+  // @@protoc_insertion_point(class_scope:google.cloud.retail.v2.UserEventImportSummary)
+  private static final com.google.cloud.retail.v2.UserEventImportSummary DEFAULT_INSTANCE;
+
+  static {
+    DEFAULT_INSTANCE = new com.google.cloud.retail.v2.UserEventImportSummary();
+  }
+
+  public static com.google.cloud.retail.v2.UserEventImportSummary getDefaultInstance() {
+    return DEFAULT_INSTANCE;
+  }
+
+  private static final com.google.protobuf.Parser<UserEventImportSummary> PARSER =
+      new com.google.protobuf.AbstractParser<UserEventImportSummary>() {
+        @java.lang.Override
+        public UserEventImportSummary parsePartialFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws com.google.protobuf.InvalidProtocolBufferException {
+          return new UserEventImportSummary(input, extensionRegistry);
+        }
+      };
+
+  public static com.google.protobuf.Parser<UserEventImportSummary> parser() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.protobuf.Parser<UserEventImportSummary> getParserForType() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.cloud.retail.v2.UserEventImportSummary getDefaultInstanceForType() {
+    return DEFAULT_INSTANCE;
+  }
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/UserEventImportSummaryOrBuilder.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/UserEventImportSummaryOrBuilder.java
new file mode 100644
index 00000000..354174fd
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/UserEventImportSummaryOrBuilder.java
@@ -0,0 +1,52 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/import_config.proto
+
+package com.google.cloud.retail.v2;
+
+public interface UserEventImportSummaryOrBuilder
+    extends
+    // @@protoc_insertion_point(interface_extends:google.cloud.retail.v2.UserEventImportSummary)
+    com.google.protobuf.MessageOrBuilder {
+
+  /**
+   *
+   *
+   * <pre>
+   * Count of user events imported with complete existing catalog information.
+   * </pre>
+   *
+   * <code>int64 joined_events_count = 1;</code>
+   *
+   * @return The joinedEventsCount.
+   */
+  long getJoinedEventsCount();
+
+  /**
+   *
+   *
+   * <pre>
+   * Count of user events imported, but with catalog information not found
+   * in the imported catalog.
+   * </pre>
+   *
+   * <code>int64 unjoined_events_count = 2;</code>
+   *
+   * @return The unjoinedEventsCount.
+   */
+  long getUnjoinedEventsCount();
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/UserEventInlineSource.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/UserEventInlineSource.java
new file mode 100644
index 00000000..c94f3801
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/UserEventInlineSource.java
@@ -0,0 +1,993 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/import_config.proto
+
+package com.google.cloud.retail.v2;
+
+/**
+ *
+ *
+ * <pre>
+ * The inline source for the input config for ImportUserEvents method.
+ * </pre>
+ *
+ * Protobuf type {@code google.cloud.retail.v2.UserEventInlineSource}
+ */
+public final class UserEventInlineSource extends com.google.protobuf.GeneratedMessageV3
+    implements
+    // @@protoc_insertion_point(message_implements:google.cloud.retail.v2.UserEventInlineSource)
+    UserEventInlineSourceOrBuilder {
+  private static final long serialVersionUID = 0L;
+  // Use UserEventInlineSource.newBuilder() to construct.
+  private UserEventInlineSource(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+    super(builder);
+  }
+
+  private UserEventInlineSource() {
+    userEvents_ = java.util.Collections.emptyList();
+  }
+
+  @java.lang.Override
+  @SuppressWarnings({"unused"})
+  protected java.lang.Object newInstance(UnusedPrivateParameter unused) {
+    return new UserEventInlineSource();
+  }
+
+  @java.lang.Override
+  public final com.google.protobuf.UnknownFieldSet getUnknownFields() {
+    return this.unknownFields;
+  }
+
+  private UserEventInlineSource(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    this();
+    if (extensionRegistry == null) {
+      throw new java.lang.NullPointerException();
+    }
+    int mutable_bitField0_ = 0;
+    com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+        com.google.protobuf.UnknownFieldSet.newBuilder();
+    try {
+      boolean done = false;
+      while (!done) {
+        int tag = input.readTag();
+        switch (tag) {
+          case 0:
+            done = true;
+            break;
+          case 10:
+            {
+              if (!((mutable_bitField0_ & 0x00000001) != 0)) {
+                userEvents_ = new java.util.ArrayList<com.google.cloud.retail.v2.UserEvent>();
+                mutable_bitField0_ |= 0x00000001;
+              }
+              userEvents_.add(
+                  input.readMessage(
+                      com.google.cloud.retail.v2.UserEvent.parser(), extensionRegistry));
+              break;
+            }
+          default:
+            {
+              if (!parseUnknownField(input, unknownFields, extensionRegistry, tag)) {
+                done = true;
+              }
+              break;
+            }
+        }
+      }
+    } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+      throw e.setUnfinishedMessage(this);
+    } catch (java.io.IOException e) {
+      throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
+    } finally {
+      if (((mutable_bitField0_ & 0x00000001) != 0)) {
+        userEvents_ = java.util.Collections.unmodifiableList(userEvents_);
+      }
+      this.unknownFields = unknownFields.build();
+      makeExtensionsImmutable();
+    }
+  }
+
+  public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+    return com.google.cloud.retail.v2.ImportConfigProto
+        .internal_static_google_cloud_retail_v2_UserEventInlineSource_descriptor;
+  }
+
+  @java.lang.Override
+  protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internalGetFieldAccessorTable() {
+    return com.google.cloud.retail.v2.ImportConfigProto
+        .internal_static_google_cloud_retail_v2_UserEventInlineSource_fieldAccessorTable
+        .ensureFieldAccessorsInitialized(
+            com.google.cloud.retail.v2.UserEventInlineSource.class,
+            com.google.cloud.retail.v2.UserEventInlineSource.Builder.class);
+  }
+
+  public static final int USER_EVENTS_FIELD_NUMBER = 1;
+  private java.util.List<com.google.cloud.retail.v2.UserEvent> userEvents_;
+  /**
+   *
+   *
+   * <pre>
+   * Required. A list of user events to import. Recommended max of 10k items.
+   * </pre>
+   *
+   * <code>
+   * repeated .google.cloud.retail.v2.UserEvent user_events = 1 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   */
+  @java.lang.Override
+  public java.util.List<com.google.cloud.retail.v2.UserEvent> getUserEventsList() {
+    return userEvents_;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Required. A list of user events to import. Recommended max of 10k items.
+   * </pre>
+   *
+   * <code>
+   * repeated .google.cloud.retail.v2.UserEvent user_events = 1 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   */
+  @java.lang.Override
+  public java.util.List<? extends com.google.cloud.retail.v2.UserEventOrBuilder>
+      getUserEventsOrBuilderList() {
+    return userEvents_;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Required. A list of user events to import. Recommended max of 10k items.
+   * </pre>
+   *
+   * <code>
+   * repeated .google.cloud.retail.v2.UserEvent user_events = 1 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   */
+  @java.lang.Override
+  public int getUserEventsCount() {
+    return userEvents_.size();
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Required. A list of user events to import. Recommended max of 10k items.
+   * </pre>
+   *
+   * <code>
+   * repeated .google.cloud.retail.v2.UserEvent user_events = 1 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.UserEvent getUserEvents(int index) {
+    return userEvents_.get(index);
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Required. A list of user events to import. Recommended max of 10k items.
+   * </pre>
+   *
+   * <code>
+   * repeated .google.cloud.retail.v2.UserEvent user_events = 1 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.UserEventOrBuilder getUserEventsOrBuilder(int index) {
+    return userEvents_.get(index);
+  }
+
+  private byte memoizedIsInitialized = -1;
+
+  @java.lang.Override
+  public final boolean isInitialized() {
+    byte isInitialized = memoizedIsInitialized;
+    if (isInitialized == 1) return true;
+    if (isInitialized == 0) return false;
+
+    memoizedIsInitialized = 1;
+    return true;
+  }
+
+  @java.lang.Override
+  public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
+    for (int i = 0; i < userEvents_.size(); i++) {
+      output.writeMessage(1, userEvents_.get(i));
+    }
+    unknownFields.writeTo(output);
+  }
+
+  @java.lang.Override
+  public int getSerializedSize() {
+    int size = memoizedSize;
+    if (size != -1) return size;
+
+    size = 0;
+    for (int i = 0; i < userEvents_.size(); i++) {
+      size += com.google.protobuf.CodedOutputStream.computeMessageSize(1, userEvents_.get(i));
+    }
+    size += unknownFields.getSerializedSize();
+    memoizedSize = size;
+    return size;
+  }
+
+  @java.lang.Override
+  public boolean equals(final java.lang.Object obj) {
+    if (obj == this) {
+      return true;
+    }
+    if (!(obj instanceof com.google.cloud.retail.v2.UserEventInlineSource)) {
+      return super.equals(obj);
+    }
+    com.google.cloud.retail.v2.UserEventInlineSource other =
+        (com.google.cloud.retail.v2.UserEventInlineSource) obj;
+
+    if (!getUserEventsList().equals(other.getUserEventsList())) return false;
+    if (!unknownFields.equals(other.unknownFields)) return false;
+    return true;
+  }
+
+  @java.lang.Override
+  public int hashCode() {
+    if (memoizedHashCode != 0) {
+      return memoizedHashCode;
+    }
+    int hash = 41;
+    hash = (19 * hash) + getDescriptor().hashCode();
+    if (getUserEventsCount() > 0) {
+      hash = (37 * hash) + USER_EVENTS_FIELD_NUMBER;
+      hash = (53 * hash) + getUserEventsList().hashCode();
+    }
+    hash = (29 * hash) + unknownFields.hashCode();
+    memoizedHashCode = hash;
+    return hash;
+  }
+
+  public static com.google.cloud.retail.v2.UserEventInlineSource parseFrom(java.nio.ByteBuffer data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.UserEventInlineSource parseFrom(
+      java.nio.ByteBuffer data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.UserEventInlineSource parseFrom(
+      com.google.protobuf.ByteString data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.UserEventInlineSource parseFrom(
+      com.google.protobuf.ByteString data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.UserEventInlineSource parseFrom(byte[] data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.UserEventInlineSource parseFrom(
+      byte[] data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.UserEventInlineSource parseFrom(
+      java.io.InputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.UserEventInlineSource parseFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.UserEventInlineSource parseDelimitedFrom(
+      java.io.InputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.UserEventInlineSource parseDelimitedFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.UserEventInlineSource parseFrom(
+      com.google.protobuf.CodedInputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.UserEventInlineSource parseFrom(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  @java.lang.Override
+  public Builder newBuilderForType() {
+    return newBuilder();
+  }
+
+  public static Builder newBuilder() {
+    return DEFAULT_INSTANCE.toBuilder();
+  }
+
+  public static Builder newBuilder(com.google.cloud.retail.v2.UserEventInlineSource prototype) {
+    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+  }
+
+  @java.lang.Override
+  public Builder toBuilder() {
+    return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
+  }
+
+  @java.lang.Override
+  protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+    Builder builder = new Builder(parent);
+    return builder;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * The inline source for the input config for ImportUserEvents method.
+   * </pre>
+   *
+   * Protobuf type {@code google.cloud.retail.v2.UserEventInlineSource}
+   */
+  public static final class Builder extends com.google.protobuf.GeneratedMessageV3.Builder<Builder>
+      implements
+      // @@protoc_insertion_point(builder_implements:google.cloud.retail.v2.UserEventInlineSource)
+      com.google.cloud.retail.v2.UserEventInlineSourceOrBuilder {
+    public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+      return com.google.cloud.retail.v2.ImportConfigProto
+          .internal_static_google_cloud_retail_v2_UserEventInlineSource_descriptor;
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return com.google.cloud.retail.v2.ImportConfigProto
+          .internal_static_google_cloud_retail_v2_UserEventInlineSource_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              com.google.cloud.retail.v2.UserEventInlineSource.class,
+              com.google.cloud.retail.v2.UserEventInlineSource.Builder.class);
+    }
+
+    // Construct using com.google.cloud.retail.v2.UserEventInlineSource.newBuilder()
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
+
+    private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+      super(parent);
+      maybeForceBuilderInitialization();
+    }
+
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders) {
+        getUserEventsFieldBuilder();
+      }
+    }
+
+    @java.lang.Override
+    public Builder clear() {
+      super.clear();
+      if (userEventsBuilder_ == null) {
+        userEvents_ = java.util.Collections.emptyList();
+        bitField0_ = (bitField0_ & ~0x00000001);
+      } else {
+        userEventsBuilder_.clear();
+      }
+      return this;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
+      return com.google.cloud.retail.v2.ImportConfigProto
+          .internal_static_google_cloud_retail_v2_UserEventInlineSource_descriptor;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.UserEventInlineSource getDefaultInstanceForType() {
+      return com.google.cloud.retail.v2.UserEventInlineSource.getDefaultInstance();
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.UserEventInlineSource build() {
+      com.google.cloud.retail.v2.UserEventInlineSource result = buildPartial();
+      if (!result.isInitialized()) {
+        throw newUninitializedMessageException(result);
+      }
+      return result;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.UserEventInlineSource buildPartial() {
+      com.google.cloud.retail.v2.UserEventInlineSource result =
+          new com.google.cloud.retail.v2.UserEventInlineSource(this);
+      int from_bitField0_ = bitField0_;
+      if (userEventsBuilder_ == null) {
+        if (((bitField0_ & 0x00000001) != 0)) {
+          userEvents_ = java.util.Collections.unmodifiableList(userEvents_);
+          bitField0_ = (bitField0_ & ~0x00000001);
+        }
+        result.userEvents_ = userEvents_;
+      } else {
+        result.userEvents_ = userEventsBuilder_.build();
+      }
+      onBuilt();
+      return result;
+    }
+
+    @java.lang.Override
+    public Builder clone() {
+      return super.clone();
+    }
+
+    @java.lang.Override
+    public Builder setField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.setField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
+      return super.clearField(field);
+    }
+
+    @java.lang.Override
+    public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+      return super.clearOneof(oneof);
+    }
+
+    @java.lang.Override
+    public Builder setRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, int index, java.lang.Object value) {
+      return super.setRepeatedField(field, index, value);
+    }
+
+    @java.lang.Override
+    public Builder addRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.addRepeatedField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(com.google.protobuf.Message other) {
+      if (other instanceof com.google.cloud.retail.v2.UserEventInlineSource) {
+        return mergeFrom((com.google.cloud.retail.v2.UserEventInlineSource) other);
+      } else {
+        super.mergeFrom(other);
+        return this;
+      }
+    }
+
+    public Builder mergeFrom(com.google.cloud.retail.v2.UserEventInlineSource other) {
+      if (other == com.google.cloud.retail.v2.UserEventInlineSource.getDefaultInstance())
+        return this;
+      if (userEventsBuilder_ == null) {
+        if (!other.userEvents_.isEmpty()) {
+          if (userEvents_.isEmpty()) {
+            userEvents_ = other.userEvents_;
+            bitField0_ = (bitField0_ & ~0x00000001);
+          } else {
+            ensureUserEventsIsMutable();
+            userEvents_.addAll(other.userEvents_);
+          }
+          onChanged();
+        }
+      } else {
+        if (!other.userEvents_.isEmpty()) {
+          if (userEventsBuilder_.isEmpty()) {
+            userEventsBuilder_.dispose();
+            userEventsBuilder_ = null;
+            userEvents_ = other.userEvents_;
+            bitField0_ = (bitField0_ & ~0x00000001);
+            userEventsBuilder_ =
+                com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders
+                    ? getUserEventsFieldBuilder()
+                    : null;
+          } else {
+            userEventsBuilder_.addAllMessages(other.userEvents_);
+          }
+        }
+      }
+      this.mergeUnknownFields(other.unknownFields);
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final boolean isInitialized() {
+      return true;
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      com.google.cloud.retail.v2.UserEventInlineSource parsedMessage = null;
+      try {
+        parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        parsedMessage = (com.google.cloud.retail.v2.UserEventInlineSource) e.getUnfinishedMessage();
+        throw e.unwrapIOException();
+      } finally {
+        if (parsedMessage != null) {
+          mergeFrom(parsedMessage);
+        }
+      }
+      return this;
+    }
+
+    private int bitField0_;
+
+    private java.util.List<com.google.cloud.retail.v2.UserEvent> userEvents_ =
+        java.util.Collections.emptyList();
+
+    private void ensureUserEventsIsMutable() {
+      if (!((bitField0_ & 0x00000001) != 0)) {
+        userEvents_ = new java.util.ArrayList<com.google.cloud.retail.v2.UserEvent>(userEvents_);
+        bitField0_ |= 0x00000001;
+      }
+    }
+
+    private com.google.protobuf.RepeatedFieldBuilderV3<
+            com.google.cloud.retail.v2.UserEvent,
+            com.google.cloud.retail.v2.UserEvent.Builder,
+            com.google.cloud.retail.v2.UserEventOrBuilder>
+        userEventsBuilder_;
+
+    /**
+     *
+     *
+     * <pre>
+     * Required. A list of user events to import. Recommended max of 10k items.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.cloud.retail.v2.UserEvent user_events = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public java.util.List<com.google.cloud.retail.v2.UserEvent> getUserEventsList() {
+      if (userEventsBuilder_ == null) {
+        return java.util.Collections.unmodifiableList(userEvents_);
+      } else {
+        return userEventsBuilder_.getMessageList();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. A list of user events to import. Recommended max of 10k items.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.cloud.retail.v2.UserEvent user_events = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public int getUserEventsCount() {
+      if (userEventsBuilder_ == null) {
+        return userEvents_.size();
+      } else {
+        return userEventsBuilder_.getCount();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. A list of user events to import. Recommended max of 10k items.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.cloud.retail.v2.UserEvent user_events = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public com.google.cloud.retail.v2.UserEvent getUserEvents(int index) {
+      if (userEventsBuilder_ == null) {
+        return userEvents_.get(index);
+      } else {
+        return userEventsBuilder_.getMessage(index);
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. A list of user events to import. Recommended max of 10k items.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.cloud.retail.v2.UserEvent user_events = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder setUserEvents(int index, com.google.cloud.retail.v2.UserEvent value) {
+      if (userEventsBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        ensureUserEventsIsMutable();
+        userEvents_.set(index, value);
+        onChanged();
+      } else {
+        userEventsBuilder_.setMessage(index, value);
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. A list of user events to import. Recommended max of 10k items.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.cloud.retail.v2.UserEvent user_events = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder setUserEvents(
+        int index, com.google.cloud.retail.v2.UserEvent.Builder builderForValue) {
+      if (userEventsBuilder_ == null) {
+        ensureUserEventsIsMutable();
+        userEvents_.set(index, builderForValue.build());
+        onChanged();
+      } else {
+        userEventsBuilder_.setMessage(index, builderForValue.build());
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. A list of user events to import. Recommended max of 10k items.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.cloud.retail.v2.UserEvent user_events = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder addUserEvents(com.google.cloud.retail.v2.UserEvent value) {
+      if (userEventsBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        ensureUserEventsIsMutable();
+        userEvents_.add(value);
+        onChanged();
+      } else {
+        userEventsBuilder_.addMessage(value);
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. A list of user events to import. Recommended max of 10k items.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.cloud.retail.v2.UserEvent user_events = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder addUserEvents(int index, com.google.cloud.retail.v2.UserEvent value) {
+      if (userEventsBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        ensureUserEventsIsMutable();
+        userEvents_.add(index, value);
+        onChanged();
+      } else {
+        userEventsBuilder_.addMessage(index, value);
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. A list of user events to import. Recommended max of 10k items.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.cloud.retail.v2.UserEvent user_events = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder addUserEvents(com.google.cloud.retail.v2.UserEvent.Builder builderForValue) {
+      if (userEventsBuilder_ == null) {
+        ensureUserEventsIsMutable();
+        userEvents_.add(builderForValue.build());
+        onChanged();
+      } else {
+        userEventsBuilder_.addMessage(builderForValue.build());
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. A list of user events to import. Recommended max of 10k items.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.cloud.retail.v2.UserEvent user_events = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder addUserEvents(
+        int index, com.google.cloud.retail.v2.UserEvent.Builder builderForValue) {
+      if (userEventsBuilder_ == null) {
+        ensureUserEventsIsMutable();
+        userEvents_.add(index, builderForValue.build());
+        onChanged();
+      } else {
+        userEventsBuilder_.addMessage(index, builderForValue.build());
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. A list of user events to import. Recommended max of 10k items.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.cloud.retail.v2.UserEvent user_events = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder addAllUserEvents(
+        java.lang.Iterable<? extends com.google.cloud.retail.v2.UserEvent> values) {
+      if (userEventsBuilder_ == null) {
+        ensureUserEventsIsMutable();
+        com.google.protobuf.AbstractMessageLite.Builder.addAll(values, userEvents_);
+        onChanged();
+      } else {
+        userEventsBuilder_.addAllMessages(values);
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. A list of user events to import. Recommended max of 10k items.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.cloud.retail.v2.UserEvent user_events = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder clearUserEvents() {
+      if (userEventsBuilder_ == null) {
+        userEvents_ = java.util.Collections.emptyList();
+        bitField0_ = (bitField0_ & ~0x00000001);
+        onChanged();
+      } else {
+        userEventsBuilder_.clear();
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. A list of user events to import. Recommended max of 10k items.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.cloud.retail.v2.UserEvent user_events = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder removeUserEvents(int index) {
+      if (userEventsBuilder_ == null) {
+        ensureUserEventsIsMutable();
+        userEvents_.remove(index);
+        onChanged();
+      } else {
+        userEventsBuilder_.remove(index);
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. A list of user events to import. Recommended max of 10k items.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.cloud.retail.v2.UserEvent user_events = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public com.google.cloud.retail.v2.UserEvent.Builder getUserEventsBuilder(int index) {
+      return getUserEventsFieldBuilder().getBuilder(index);
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. A list of user events to import. Recommended max of 10k items.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.cloud.retail.v2.UserEvent user_events = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public com.google.cloud.retail.v2.UserEventOrBuilder getUserEventsOrBuilder(int index) {
+      if (userEventsBuilder_ == null) {
+        return userEvents_.get(index);
+      } else {
+        return userEventsBuilder_.getMessageOrBuilder(index);
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. A list of user events to import. Recommended max of 10k items.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.cloud.retail.v2.UserEvent user_events = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public java.util.List<? extends com.google.cloud.retail.v2.UserEventOrBuilder>
+        getUserEventsOrBuilderList() {
+      if (userEventsBuilder_ != null) {
+        return userEventsBuilder_.getMessageOrBuilderList();
+      } else {
+        return java.util.Collections.unmodifiableList(userEvents_);
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. A list of user events to import. Recommended max of 10k items.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.cloud.retail.v2.UserEvent user_events = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public com.google.cloud.retail.v2.UserEvent.Builder addUserEventsBuilder() {
+      return getUserEventsFieldBuilder()
+          .addBuilder(com.google.cloud.retail.v2.UserEvent.getDefaultInstance());
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. A list of user events to import. Recommended max of 10k items.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.cloud.retail.v2.UserEvent user_events = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public com.google.cloud.retail.v2.UserEvent.Builder addUserEventsBuilder(int index) {
+      return getUserEventsFieldBuilder()
+          .addBuilder(index, com.google.cloud.retail.v2.UserEvent.getDefaultInstance());
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. A list of user events to import. Recommended max of 10k items.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.cloud.retail.v2.UserEvent user_events = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public java.util.List<com.google.cloud.retail.v2.UserEvent.Builder> getUserEventsBuilderList() {
+      return getUserEventsFieldBuilder().getBuilderList();
+    }
+
+    private com.google.protobuf.RepeatedFieldBuilderV3<
+            com.google.cloud.retail.v2.UserEvent,
+            com.google.cloud.retail.v2.UserEvent.Builder,
+            com.google.cloud.retail.v2.UserEventOrBuilder>
+        getUserEventsFieldBuilder() {
+      if (userEventsBuilder_ == null) {
+        userEventsBuilder_ =
+            new com.google.protobuf.RepeatedFieldBuilderV3<
+                com.google.cloud.retail.v2.UserEvent,
+                com.google.cloud.retail.v2.UserEvent.Builder,
+                com.google.cloud.retail.v2.UserEventOrBuilder>(
+                userEvents_, ((bitField0_ & 0x00000001) != 0), getParentForChildren(), isClean());
+        userEvents_ = null;
+      }
+      return userEventsBuilder_;
+    }
+
+    @java.lang.Override
+    public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.setUnknownFields(unknownFields);
+    }
+
+    @java.lang.Override
+    public final Builder mergeUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.mergeUnknownFields(unknownFields);
+    }
+
+    // @@protoc_insertion_point(builder_scope:google.cloud.retail.v2.UserEventInlineSource)
+  }
+
+  // @@protoc_insertion_point(class_scope:google.cloud.retail.v2.UserEventInlineSource)
+  private static final com.google.cloud.retail.v2.UserEventInlineSource DEFAULT_INSTANCE;
+
+  static {
+    DEFAULT_INSTANCE = new com.google.cloud.retail.v2.UserEventInlineSource();
+  }
+
+  public static com.google.cloud.retail.v2.UserEventInlineSource getDefaultInstance() {
+    return DEFAULT_INSTANCE;
+  }
+
+  private static final com.google.protobuf.Parser<UserEventInlineSource> PARSER =
+      new com.google.protobuf.AbstractParser<UserEventInlineSource>() {
+        @java.lang.Override
+        public UserEventInlineSource parsePartialFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws com.google.protobuf.InvalidProtocolBufferException {
+          return new UserEventInlineSource(input, extensionRegistry);
+        }
+      };
+
+  public static com.google.protobuf.Parser<UserEventInlineSource> parser() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.protobuf.Parser<UserEventInlineSource> getParserForType() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.cloud.retail.v2.UserEventInlineSource getDefaultInstanceForType() {
+    return DEFAULT_INSTANCE;
+  }
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/UserEventInlineSourceOrBuilder.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/UserEventInlineSourceOrBuilder.java
new file mode 100644
index 00000000..5d261f81
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/UserEventInlineSourceOrBuilder.java
@@ -0,0 +1,87 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/import_config.proto
+
+package com.google.cloud.retail.v2;
+
+public interface UserEventInlineSourceOrBuilder
+    extends
+    // @@protoc_insertion_point(interface_extends:google.cloud.retail.v2.UserEventInlineSource)
+    com.google.protobuf.MessageOrBuilder {
+
+  /**
+   *
+   *
+   * <pre>
+   * Required. A list of user events to import. Recommended max of 10k items.
+   * </pre>
+   *
+   * <code>
+   * repeated .google.cloud.retail.v2.UserEvent user_events = 1 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   */
+  java.util.List<com.google.cloud.retail.v2.UserEvent> getUserEventsList();
+  /**
+   *
+   *
+   * <pre>
+   * Required. A list of user events to import. Recommended max of 10k items.
+   * </pre>
+   *
+   * <code>
+   * repeated .google.cloud.retail.v2.UserEvent user_events = 1 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   */
+  com.google.cloud.retail.v2.UserEvent getUserEvents(int index);
+  /**
+   *
+   *
+   * <pre>
+   * Required. A list of user events to import. Recommended max of 10k items.
+   * </pre>
+   *
+   * <code>
+   * repeated .google.cloud.retail.v2.UserEvent user_events = 1 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   */
+  int getUserEventsCount();
+  /**
+   *
+   *
+   * <pre>
+   * Required. A list of user events to import. Recommended max of 10k items.
+   * </pre>
+   *
+   * <code>
+   * repeated .google.cloud.retail.v2.UserEvent user_events = 1 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   */
+  java.util.List<? extends com.google.cloud.retail.v2.UserEventOrBuilder>
+      getUserEventsOrBuilderList();
+  /**
+   *
+   *
+   * <pre>
+   * Required. A list of user events to import. Recommended max of 10k items.
+   * </pre>
+   *
+   * <code>
+   * repeated .google.cloud.retail.v2.UserEvent user_events = 1 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   */
+  com.google.cloud.retail.v2.UserEventOrBuilder getUserEventsOrBuilder(int index);
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/UserEventInputConfig.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/UserEventInputConfig.java
new file mode 100644
index 00000000..93259aa9
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/UserEventInputConfig.java
@@ -0,0 +1,1521 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/import_config.proto
+
+package com.google.cloud.retail.v2;
+
+/**
+ *
+ *
+ * <pre>
+ * The input config source for user events.
+ * </pre>
+ *
+ * Protobuf type {@code google.cloud.retail.v2.UserEventInputConfig}
+ */
+public final class UserEventInputConfig extends com.google.protobuf.GeneratedMessageV3
+    implements
+    // @@protoc_insertion_point(message_implements:google.cloud.retail.v2.UserEventInputConfig)
+    UserEventInputConfigOrBuilder {
+  private static final long serialVersionUID = 0L;
+  // Use UserEventInputConfig.newBuilder() to construct.
+  private UserEventInputConfig(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+    super(builder);
+  }
+
+  private UserEventInputConfig() {}
+
+  @java.lang.Override
+  @SuppressWarnings({"unused"})
+  protected java.lang.Object newInstance(UnusedPrivateParameter unused) {
+    return new UserEventInputConfig();
+  }
+
+  @java.lang.Override
+  public final com.google.protobuf.UnknownFieldSet getUnknownFields() {
+    return this.unknownFields;
+  }
+
+  private UserEventInputConfig(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    this();
+    if (extensionRegistry == null) {
+      throw new java.lang.NullPointerException();
+    }
+    com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+        com.google.protobuf.UnknownFieldSet.newBuilder();
+    try {
+      boolean done = false;
+      while (!done) {
+        int tag = input.readTag();
+        switch (tag) {
+          case 0:
+            done = true;
+            break;
+          case 10:
+            {
+              com.google.cloud.retail.v2.UserEventInlineSource.Builder subBuilder = null;
+              if (sourceCase_ == 1) {
+                subBuilder =
+                    ((com.google.cloud.retail.v2.UserEventInlineSource) source_).toBuilder();
+              }
+              source_ =
+                  input.readMessage(
+                      com.google.cloud.retail.v2.UserEventInlineSource.parser(), extensionRegistry);
+              if (subBuilder != null) {
+                subBuilder.mergeFrom((com.google.cloud.retail.v2.UserEventInlineSource) source_);
+                source_ = subBuilder.buildPartial();
+              }
+              sourceCase_ = 1;
+              break;
+            }
+          case 18:
+            {
+              com.google.cloud.retail.v2.GcsSource.Builder subBuilder = null;
+              if (sourceCase_ == 2) {
+                subBuilder = ((com.google.cloud.retail.v2.GcsSource) source_).toBuilder();
+              }
+              source_ =
+                  input.readMessage(
+                      com.google.cloud.retail.v2.GcsSource.parser(), extensionRegistry);
+              if (subBuilder != null) {
+                subBuilder.mergeFrom((com.google.cloud.retail.v2.GcsSource) source_);
+                source_ = subBuilder.buildPartial();
+              }
+              sourceCase_ = 2;
+              break;
+            }
+          case 26:
+            {
+              com.google.cloud.retail.v2.BigQuerySource.Builder subBuilder = null;
+              if (sourceCase_ == 3) {
+                subBuilder = ((com.google.cloud.retail.v2.BigQuerySource) source_).toBuilder();
+              }
+              source_ =
+                  input.readMessage(
+                      com.google.cloud.retail.v2.BigQuerySource.parser(), extensionRegistry);
+              if (subBuilder != null) {
+                subBuilder.mergeFrom((com.google.cloud.retail.v2.BigQuerySource) source_);
+                source_ = subBuilder.buildPartial();
+              }
+              sourceCase_ = 3;
+              break;
+            }
+          default:
+            {
+              if (!parseUnknownField(input, unknownFields, extensionRegistry, tag)) {
+                done = true;
+              }
+              break;
+            }
+        }
+      }
+    } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+      throw e.setUnfinishedMessage(this);
+    } catch (java.io.IOException e) {
+      throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
+    } finally {
+      this.unknownFields = unknownFields.build();
+      makeExtensionsImmutable();
+    }
+  }
+
+  public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+    return com.google.cloud.retail.v2.ImportConfigProto
+        .internal_static_google_cloud_retail_v2_UserEventInputConfig_descriptor;
+  }
+
+  @java.lang.Override
+  protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internalGetFieldAccessorTable() {
+    return com.google.cloud.retail.v2.ImportConfigProto
+        .internal_static_google_cloud_retail_v2_UserEventInputConfig_fieldAccessorTable
+        .ensureFieldAccessorsInitialized(
+            com.google.cloud.retail.v2.UserEventInputConfig.class,
+            com.google.cloud.retail.v2.UserEventInputConfig.Builder.class);
+  }
+
+  private int sourceCase_ = 0;
+  private java.lang.Object source_;
+
+  public enum SourceCase
+      implements
+          com.google.protobuf.Internal.EnumLite,
+          com.google.protobuf.AbstractMessage.InternalOneOfEnum {
+    USER_EVENT_INLINE_SOURCE(1),
+    GCS_SOURCE(2),
+    BIG_QUERY_SOURCE(3),
+    SOURCE_NOT_SET(0);
+    private final int value;
+
+    private SourceCase(int value) {
+      this.value = value;
+    }
+    /**
+     * @param value The number of the enum to look for.
+     * @return The enum associated with the given number.
+     * @deprecated Use {@link #forNumber(int)} instead.
+     */
+    @java.lang.Deprecated
+    public static SourceCase valueOf(int value) {
+      return forNumber(value);
+    }
+
+    public static SourceCase forNumber(int value) {
+      switch (value) {
+        case 1:
+          return USER_EVENT_INLINE_SOURCE;
+        case 2:
+          return GCS_SOURCE;
+        case 3:
+          return BIG_QUERY_SOURCE;
+        case 0:
+          return SOURCE_NOT_SET;
+        default:
+          return null;
+      }
+    }
+
+    public int getNumber() {
+      return this.value;
+    }
+  };
+
+  public SourceCase getSourceCase() {
+    return SourceCase.forNumber(sourceCase_);
+  }
+
+  public static final int USER_EVENT_INLINE_SOURCE_FIELD_NUMBER = 1;
+  /**
+   *
+   *
+   * <pre>
+   * Required. The Inline source for the input content for UserEvents.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.retail.v2.UserEventInlineSource user_event_inline_source = 1 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   *
+   * @return Whether the userEventInlineSource field is set.
+   */
+  @java.lang.Override
+  public boolean hasUserEventInlineSource() {
+    return sourceCase_ == 1;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Required. The Inline source for the input content for UserEvents.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.retail.v2.UserEventInlineSource user_event_inline_source = 1 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   *
+   * @return The userEventInlineSource.
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.UserEventInlineSource getUserEventInlineSource() {
+    if (sourceCase_ == 1) {
+      return (com.google.cloud.retail.v2.UserEventInlineSource) source_;
+    }
+    return com.google.cloud.retail.v2.UserEventInlineSource.getDefaultInstance();
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Required. The Inline source for the input content for UserEvents.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.retail.v2.UserEventInlineSource user_event_inline_source = 1 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.UserEventInlineSourceOrBuilder
+      getUserEventInlineSourceOrBuilder() {
+    if (sourceCase_ == 1) {
+      return (com.google.cloud.retail.v2.UserEventInlineSource) source_;
+    }
+    return com.google.cloud.retail.v2.UserEventInlineSource.getDefaultInstance();
+  }
+
+  public static final int GCS_SOURCE_FIELD_NUMBER = 2;
+  /**
+   *
+   *
+   * <pre>
+   * Required. Google Cloud Storage location for the input content.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.retail.v2.GcsSource gcs_source = 2 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   *
+   * @return Whether the gcsSource field is set.
+   */
+  @java.lang.Override
+  public boolean hasGcsSource() {
+    return sourceCase_ == 2;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Required. Google Cloud Storage location for the input content.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.retail.v2.GcsSource gcs_source = 2 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   *
+   * @return The gcsSource.
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.GcsSource getGcsSource() {
+    if (sourceCase_ == 2) {
+      return (com.google.cloud.retail.v2.GcsSource) source_;
+    }
+    return com.google.cloud.retail.v2.GcsSource.getDefaultInstance();
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Required. Google Cloud Storage location for the input content.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.retail.v2.GcsSource gcs_source = 2 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.GcsSourceOrBuilder getGcsSourceOrBuilder() {
+    if (sourceCase_ == 2) {
+      return (com.google.cloud.retail.v2.GcsSource) source_;
+    }
+    return com.google.cloud.retail.v2.GcsSource.getDefaultInstance();
+  }
+
+  public static final int BIG_QUERY_SOURCE_FIELD_NUMBER = 3;
+  /**
+   *
+   *
+   * <pre>
+   * Required. BigQuery input source.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.retail.v2.BigQuerySource big_query_source = 3 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   *
+   * @return Whether the bigQuerySource field is set.
+   */
+  @java.lang.Override
+  public boolean hasBigQuerySource() {
+    return sourceCase_ == 3;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Required. BigQuery input source.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.retail.v2.BigQuerySource big_query_source = 3 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   *
+   * @return The bigQuerySource.
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.BigQuerySource getBigQuerySource() {
+    if (sourceCase_ == 3) {
+      return (com.google.cloud.retail.v2.BigQuerySource) source_;
+    }
+    return com.google.cloud.retail.v2.BigQuerySource.getDefaultInstance();
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Required. BigQuery input source.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.retail.v2.BigQuerySource big_query_source = 3 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.BigQuerySourceOrBuilder getBigQuerySourceOrBuilder() {
+    if (sourceCase_ == 3) {
+      return (com.google.cloud.retail.v2.BigQuerySource) source_;
+    }
+    return com.google.cloud.retail.v2.BigQuerySource.getDefaultInstance();
+  }
+
+  private byte memoizedIsInitialized = -1;
+
+  @java.lang.Override
+  public final boolean isInitialized() {
+    byte isInitialized = memoizedIsInitialized;
+    if (isInitialized == 1) return true;
+    if (isInitialized == 0) return false;
+
+    memoizedIsInitialized = 1;
+    return true;
+  }
+
+  @java.lang.Override
+  public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
+    if (sourceCase_ == 1) {
+      output.writeMessage(1, (com.google.cloud.retail.v2.UserEventInlineSource) source_);
+    }
+    if (sourceCase_ == 2) {
+      output.writeMessage(2, (com.google.cloud.retail.v2.GcsSource) source_);
+    }
+    if (sourceCase_ == 3) {
+      output.writeMessage(3, (com.google.cloud.retail.v2.BigQuerySource) source_);
+    }
+    unknownFields.writeTo(output);
+  }
+
+  @java.lang.Override
+  public int getSerializedSize() {
+    int size = memoizedSize;
+    if (size != -1) return size;
+
+    size = 0;
+    if (sourceCase_ == 1) {
+      size +=
+          com.google.protobuf.CodedOutputStream.computeMessageSize(
+              1, (com.google.cloud.retail.v2.UserEventInlineSource) source_);
+    }
+    if (sourceCase_ == 2) {
+      size +=
+          com.google.protobuf.CodedOutputStream.computeMessageSize(
+              2, (com.google.cloud.retail.v2.GcsSource) source_);
+    }
+    if (sourceCase_ == 3) {
+      size +=
+          com.google.protobuf.CodedOutputStream.computeMessageSize(
+              3, (com.google.cloud.retail.v2.BigQuerySource) source_);
+    }
+    size += unknownFields.getSerializedSize();
+    memoizedSize = size;
+    return size;
+  }
+
+  @java.lang.Override
+  public boolean equals(final java.lang.Object obj) {
+    if (obj == this) {
+      return true;
+    }
+    if (!(obj instanceof com.google.cloud.retail.v2.UserEventInputConfig)) {
+      return super.equals(obj);
+    }
+    com.google.cloud.retail.v2.UserEventInputConfig other =
+        (com.google.cloud.retail.v2.UserEventInputConfig) obj;
+
+    if (!getSourceCase().equals(other.getSourceCase())) return false;
+    switch (sourceCase_) {
+      case 1:
+        if (!getUserEventInlineSource().equals(other.getUserEventInlineSource())) return false;
+        break;
+      case 2:
+        if (!getGcsSource().equals(other.getGcsSource())) return false;
+        break;
+      case 3:
+        if (!getBigQuerySource().equals(other.getBigQuerySource())) return false;
+        break;
+      case 0:
+      default:
+    }
+    if (!unknownFields.equals(other.unknownFields)) return false;
+    return true;
+  }
+
+  @java.lang.Override
+  public int hashCode() {
+    if (memoizedHashCode != 0) {
+      return memoizedHashCode;
+    }
+    int hash = 41;
+    hash = (19 * hash) + getDescriptor().hashCode();
+    switch (sourceCase_) {
+      case 1:
+        hash = (37 * hash) + USER_EVENT_INLINE_SOURCE_FIELD_NUMBER;
+        hash = (53 * hash) + getUserEventInlineSource().hashCode();
+        break;
+      case 2:
+        hash = (37 * hash) + GCS_SOURCE_FIELD_NUMBER;
+        hash = (53 * hash) + getGcsSource().hashCode();
+        break;
+      case 3:
+        hash = (37 * hash) + BIG_QUERY_SOURCE_FIELD_NUMBER;
+        hash = (53 * hash) + getBigQuerySource().hashCode();
+        break;
+      case 0:
+      default:
+    }
+    hash = (29 * hash) + unknownFields.hashCode();
+    memoizedHashCode = hash;
+    return hash;
+  }
+
+  public static com.google.cloud.retail.v2.UserEventInputConfig parseFrom(java.nio.ByteBuffer data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.UserEventInputConfig parseFrom(
+      java.nio.ByteBuffer data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.UserEventInputConfig parseFrom(
+      com.google.protobuf.ByteString data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.UserEventInputConfig parseFrom(
+      com.google.protobuf.ByteString data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.UserEventInputConfig parseFrom(byte[] data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.UserEventInputConfig parseFrom(
+      byte[] data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.UserEventInputConfig parseFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.UserEventInputConfig parseFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.UserEventInputConfig parseDelimitedFrom(
+      java.io.InputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.UserEventInputConfig parseDelimitedFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.UserEventInputConfig parseFrom(
+      com.google.protobuf.CodedInputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.UserEventInputConfig parseFrom(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  @java.lang.Override
+  public Builder newBuilderForType() {
+    return newBuilder();
+  }
+
+  public static Builder newBuilder() {
+    return DEFAULT_INSTANCE.toBuilder();
+  }
+
+  public static Builder newBuilder(com.google.cloud.retail.v2.UserEventInputConfig prototype) {
+    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+  }
+
+  @java.lang.Override
+  public Builder toBuilder() {
+    return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
+  }
+
+  @java.lang.Override
+  protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+    Builder builder = new Builder(parent);
+    return builder;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * The input config source for user events.
+   * </pre>
+   *
+   * Protobuf type {@code google.cloud.retail.v2.UserEventInputConfig}
+   */
+  public static final class Builder extends com.google.protobuf.GeneratedMessageV3.Builder<Builder>
+      implements
+      // @@protoc_insertion_point(builder_implements:google.cloud.retail.v2.UserEventInputConfig)
+      com.google.cloud.retail.v2.UserEventInputConfigOrBuilder {
+    public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+      return com.google.cloud.retail.v2.ImportConfigProto
+          .internal_static_google_cloud_retail_v2_UserEventInputConfig_descriptor;
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return com.google.cloud.retail.v2.ImportConfigProto
+          .internal_static_google_cloud_retail_v2_UserEventInputConfig_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              com.google.cloud.retail.v2.UserEventInputConfig.class,
+              com.google.cloud.retail.v2.UserEventInputConfig.Builder.class);
+    }
+
+    // Construct using com.google.cloud.retail.v2.UserEventInputConfig.newBuilder()
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
+
+    private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+      super(parent);
+      maybeForceBuilderInitialization();
+    }
+
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders) {}
+    }
+
+    @java.lang.Override
+    public Builder clear() {
+      super.clear();
+      sourceCase_ = 0;
+      source_ = null;
+      return this;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
+      return com.google.cloud.retail.v2.ImportConfigProto
+          .internal_static_google_cloud_retail_v2_UserEventInputConfig_descriptor;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.UserEventInputConfig getDefaultInstanceForType() {
+      return com.google.cloud.retail.v2.UserEventInputConfig.getDefaultInstance();
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.UserEventInputConfig build() {
+      com.google.cloud.retail.v2.UserEventInputConfig result = buildPartial();
+      if (!result.isInitialized()) {
+        throw newUninitializedMessageException(result);
+      }
+      return result;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.UserEventInputConfig buildPartial() {
+      com.google.cloud.retail.v2.UserEventInputConfig result =
+          new com.google.cloud.retail.v2.UserEventInputConfig(this);
+      if (sourceCase_ == 1) {
+        if (userEventInlineSourceBuilder_ == null) {
+          result.source_ = source_;
+        } else {
+          result.source_ = userEventInlineSourceBuilder_.build();
+        }
+      }
+      if (sourceCase_ == 2) {
+        if (gcsSourceBuilder_ == null) {
+          result.source_ = source_;
+        } else {
+          result.source_ = gcsSourceBuilder_.build();
+        }
+      }
+      if (sourceCase_ == 3) {
+        if (bigQuerySourceBuilder_ == null) {
+          result.source_ = source_;
+        } else {
+          result.source_ = bigQuerySourceBuilder_.build();
+        }
+      }
+      result.sourceCase_ = sourceCase_;
+      onBuilt();
+      return result;
+    }
+
+    @java.lang.Override
+    public Builder clone() {
+      return super.clone();
+    }
+
+    @java.lang.Override
+    public Builder setField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.setField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
+      return super.clearField(field);
+    }
+
+    @java.lang.Override
+    public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+      return super.clearOneof(oneof);
+    }
+
+    @java.lang.Override
+    public Builder setRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, int index, java.lang.Object value) {
+      return super.setRepeatedField(field, index, value);
+    }
+
+    @java.lang.Override
+    public Builder addRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.addRepeatedField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(com.google.protobuf.Message other) {
+      if (other instanceof com.google.cloud.retail.v2.UserEventInputConfig) {
+        return mergeFrom((com.google.cloud.retail.v2.UserEventInputConfig) other);
+      } else {
+        super.mergeFrom(other);
+        return this;
+      }
+    }
+
+    public Builder mergeFrom(com.google.cloud.retail.v2.UserEventInputConfig other) {
+      if (other == com.google.cloud.retail.v2.UserEventInputConfig.getDefaultInstance())
+        return this;
+      switch (other.getSourceCase()) {
+        case USER_EVENT_INLINE_SOURCE:
+          {
+            mergeUserEventInlineSource(other.getUserEventInlineSource());
+            break;
+          }
+        case GCS_SOURCE:
+          {
+            mergeGcsSource(other.getGcsSource());
+            break;
+          }
+        case BIG_QUERY_SOURCE:
+          {
+            mergeBigQuerySource(other.getBigQuerySource());
+            break;
+          }
+        case SOURCE_NOT_SET:
+          {
+            break;
+          }
+      }
+      this.mergeUnknownFields(other.unknownFields);
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final boolean isInitialized() {
+      return true;
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      com.google.cloud.retail.v2.UserEventInputConfig parsedMessage = null;
+      try {
+        parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        parsedMessage = (com.google.cloud.retail.v2.UserEventInputConfig) e.getUnfinishedMessage();
+        throw e.unwrapIOException();
+      } finally {
+        if (parsedMessage != null) {
+          mergeFrom(parsedMessage);
+        }
+      }
+      return this;
+    }
+
+    private int sourceCase_ = 0;
+    private java.lang.Object source_;
+
+    public SourceCase getSourceCase() {
+      return SourceCase.forNumber(sourceCase_);
+    }
+
+    public Builder clearSource() {
+      sourceCase_ = 0;
+      source_ = null;
+      onChanged();
+      return this;
+    }
+
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.cloud.retail.v2.UserEventInlineSource,
+            com.google.cloud.retail.v2.UserEventInlineSource.Builder,
+            com.google.cloud.retail.v2.UserEventInlineSourceOrBuilder>
+        userEventInlineSourceBuilder_;
+    /**
+     *
+     *
+     * <pre>
+     * Required. The Inline source for the input content for UserEvents.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.UserEventInlineSource user_event_inline_source = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     *
+     * @return Whether the userEventInlineSource field is set.
+     */
+    @java.lang.Override
+    public boolean hasUserEventInlineSource() {
+      return sourceCase_ == 1;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The Inline source for the input content for UserEvents.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.UserEventInlineSource user_event_inline_source = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     *
+     * @return The userEventInlineSource.
+     */
+    @java.lang.Override
+    public com.google.cloud.retail.v2.UserEventInlineSource getUserEventInlineSource() {
+      if (userEventInlineSourceBuilder_ == null) {
+        if (sourceCase_ == 1) {
+          return (com.google.cloud.retail.v2.UserEventInlineSource) source_;
+        }
+        return com.google.cloud.retail.v2.UserEventInlineSource.getDefaultInstance();
+      } else {
+        if (sourceCase_ == 1) {
+          return userEventInlineSourceBuilder_.getMessage();
+        }
+        return com.google.cloud.retail.v2.UserEventInlineSource.getDefaultInstance();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The Inline source for the input content for UserEvents.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.UserEventInlineSource user_event_inline_source = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder setUserEventInlineSource(
+        com.google.cloud.retail.v2.UserEventInlineSource value) {
+      if (userEventInlineSourceBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        source_ = value;
+        onChanged();
+      } else {
+        userEventInlineSourceBuilder_.setMessage(value);
+      }
+      sourceCase_ = 1;
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The Inline source for the input content for UserEvents.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.UserEventInlineSource user_event_inline_source = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder setUserEventInlineSource(
+        com.google.cloud.retail.v2.UserEventInlineSource.Builder builderForValue) {
+      if (userEventInlineSourceBuilder_ == null) {
+        source_ = builderForValue.build();
+        onChanged();
+      } else {
+        userEventInlineSourceBuilder_.setMessage(builderForValue.build());
+      }
+      sourceCase_ = 1;
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The Inline source for the input content for UserEvents.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.UserEventInlineSource user_event_inline_source = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder mergeUserEventInlineSource(
+        com.google.cloud.retail.v2.UserEventInlineSource value) {
+      if (userEventInlineSourceBuilder_ == null) {
+        if (sourceCase_ == 1
+            && source_ != com.google.cloud.retail.v2.UserEventInlineSource.getDefaultInstance()) {
+          source_ =
+              com.google.cloud.retail.v2.UserEventInlineSource.newBuilder(
+                      (com.google.cloud.retail.v2.UserEventInlineSource) source_)
+                  .mergeFrom(value)
+                  .buildPartial();
+        } else {
+          source_ = value;
+        }
+        onChanged();
+      } else {
+        if (sourceCase_ == 1) {
+          userEventInlineSourceBuilder_.mergeFrom(value);
+        }
+        userEventInlineSourceBuilder_.setMessage(value);
+      }
+      sourceCase_ = 1;
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The Inline source for the input content for UserEvents.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.UserEventInlineSource user_event_inline_source = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder clearUserEventInlineSource() {
+      if (userEventInlineSourceBuilder_ == null) {
+        if (sourceCase_ == 1) {
+          sourceCase_ = 0;
+          source_ = null;
+          onChanged();
+        }
+      } else {
+        if (sourceCase_ == 1) {
+          sourceCase_ = 0;
+          source_ = null;
+        }
+        userEventInlineSourceBuilder_.clear();
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The Inline source for the input content for UserEvents.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.UserEventInlineSource user_event_inline_source = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public com.google.cloud.retail.v2.UserEventInlineSource.Builder
+        getUserEventInlineSourceBuilder() {
+      return getUserEventInlineSourceFieldBuilder().getBuilder();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The Inline source for the input content for UserEvents.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.UserEventInlineSource user_event_inline_source = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    @java.lang.Override
+    public com.google.cloud.retail.v2.UserEventInlineSourceOrBuilder
+        getUserEventInlineSourceOrBuilder() {
+      if ((sourceCase_ == 1) && (userEventInlineSourceBuilder_ != null)) {
+        return userEventInlineSourceBuilder_.getMessageOrBuilder();
+      } else {
+        if (sourceCase_ == 1) {
+          return (com.google.cloud.retail.v2.UserEventInlineSource) source_;
+        }
+        return com.google.cloud.retail.v2.UserEventInlineSource.getDefaultInstance();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The Inline source for the input content for UserEvents.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.UserEventInlineSource user_event_inline_source = 1 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.cloud.retail.v2.UserEventInlineSource,
+            com.google.cloud.retail.v2.UserEventInlineSource.Builder,
+            com.google.cloud.retail.v2.UserEventInlineSourceOrBuilder>
+        getUserEventInlineSourceFieldBuilder() {
+      if (userEventInlineSourceBuilder_ == null) {
+        if (!(sourceCase_ == 1)) {
+          source_ = com.google.cloud.retail.v2.UserEventInlineSource.getDefaultInstance();
+        }
+        userEventInlineSourceBuilder_ =
+            new com.google.protobuf.SingleFieldBuilderV3<
+                com.google.cloud.retail.v2.UserEventInlineSource,
+                com.google.cloud.retail.v2.UserEventInlineSource.Builder,
+                com.google.cloud.retail.v2.UserEventInlineSourceOrBuilder>(
+                (com.google.cloud.retail.v2.UserEventInlineSource) source_,
+                getParentForChildren(),
+                isClean());
+        source_ = null;
+      }
+      sourceCase_ = 1;
+      onChanged();
+      ;
+      return userEventInlineSourceBuilder_;
+    }
+
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.cloud.retail.v2.GcsSource,
+            com.google.cloud.retail.v2.GcsSource.Builder,
+            com.google.cloud.retail.v2.GcsSourceOrBuilder>
+        gcsSourceBuilder_;
+    /**
+     *
+     *
+     * <pre>
+     * Required. Google Cloud Storage location for the input content.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.GcsSource gcs_source = 2 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     *
+     * @return Whether the gcsSource field is set.
+     */
+    @java.lang.Override
+    public boolean hasGcsSource() {
+      return sourceCase_ == 2;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. Google Cloud Storage location for the input content.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.GcsSource gcs_source = 2 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     *
+     * @return The gcsSource.
+     */
+    @java.lang.Override
+    public com.google.cloud.retail.v2.GcsSource getGcsSource() {
+      if (gcsSourceBuilder_ == null) {
+        if (sourceCase_ == 2) {
+          return (com.google.cloud.retail.v2.GcsSource) source_;
+        }
+        return com.google.cloud.retail.v2.GcsSource.getDefaultInstance();
+      } else {
+        if (sourceCase_ == 2) {
+          return gcsSourceBuilder_.getMessage();
+        }
+        return com.google.cloud.retail.v2.GcsSource.getDefaultInstance();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. Google Cloud Storage location for the input content.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.GcsSource gcs_source = 2 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder setGcsSource(com.google.cloud.retail.v2.GcsSource value) {
+      if (gcsSourceBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        source_ = value;
+        onChanged();
+      } else {
+        gcsSourceBuilder_.setMessage(value);
+      }
+      sourceCase_ = 2;
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. Google Cloud Storage location for the input content.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.GcsSource gcs_source = 2 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder setGcsSource(com.google.cloud.retail.v2.GcsSource.Builder builderForValue) {
+      if (gcsSourceBuilder_ == null) {
+        source_ = builderForValue.build();
+        onChanged();
+      } else {
+        gcsSourceBuilder_.setMessage(builderForValue.build());
+      }
+      sourceCase_ = 2;
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. Google Cloud Storage location for the input content.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.GcsSource gcs_source = 2 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder mergeGcsSource(com.google.cloud.retail.v2.GcsSource value) {
+      if (gcsSourceBuilder_ == null) {
+        if (sourceCase_ == 2
+            && source_ != com.google.cloud.retail.v2.GcsSource.getDefaultInstance()) {
+          source_ =
+              com.google.cloud.retail.v2.GcsSource.newBuilder(
+                      (com.google.cloud.retail.v2.GcsSource) source_)
+                  .mergeFrom(value)
+                  .buildPartial();
+        } else {
+          source_ = value;
+        }
+        onChanged();
+      } else {
+        if (sourceCase_ == 2) {
+          gcsSourceBuilder_.mergeFrom(value);
+        }
+        gcsSourceBuilder_.setMessage(value);
+      }
+      sourceCase_ = 2;
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. Google Cloud Storage location for the input content.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.GcsSource gcs_source = 2 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder clearGcsSource() {
+      if (gcsSourceBuilder_ == null) {
+        if (sourceCase_ == 2) {
+          sourceCase_ = 0;
+          source_ = null;
+          onChanged();
+        }
+      } else {
+        if (sourceCase_ == 2) {
+          sourceCase_ = 0;
+          source_ = null;
+        }
+        gcsSourceBuilder_.clear();
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. Google Cloud Storage location for the input content.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.GcsSource gcs_source = 2 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public com.google.cloud.retail.v2.GcsSource.Builder getGcsSourceBuilder() {
+      return getGcsSourceFieldBuilder().getBuilder();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. Google Cloud Storage location for the input content.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.GcsSource gcs_source = 2 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    @java.lang.Override
+    public com.google.cloud.retail.v2.GcsSourceOrBuilder getGcsSourceOrBuilder() {
+      if ((sourceCase_ == 2) && (gcsSourceBuilder_ != null)) {
+        return gcsSourceBuilder_.getMessageOrBuilder();
+      } else {
+        if (sourceCase_ == 2) {
+          return (com.google.cloud.retail.v2.GcsSource) source_;
+        }
+        return com.google.cloud.retail.v2.GcsSource.getDefaultInstance();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. Google Cloud Storage location for the input content.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.GcsSource gcs_source = 2 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.cloud.retail.v2.GcsSource,
+            com.google.cloud.retail.v2.GcsSource.Builder,
+            com.google.cloud.retail.v2.GcsSourceOrBuilder>
+        getGcsSourceFieldBuilder() {
+      if (gcsSourceBuilder_ == null) {
+        if (!(sourceCase_ == 2)) {
+          source_ = com.google.cloud.retail.v2.GcsSource.getDefaultInstance();
+        }
+        gcsSourceBuilder_ =
+            new com.google.protobuf.SingleFieldBuilderV3<
+                com.google.cloud.retail.v2.GcsSource,
+                com.google.cloud.retail.v2.GcsSource.Builder,
+                com.google.cloud.retail.v2.GcsSourceOrBuilder>(
+                (com.google.cloud.retail.v2.GcsSource) source_, getParentForChildren(), isClean());
+        source_ = null;
+      }
+      sourceCase_ = 2;
+      onChanged();
+      ;
+      return gcsSourceBuilder_;
+    }
+
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.cloud.retail.v2.BigQuerySource,
+            com.google.cloud.retail.v2.BigQuerySource.Builder,
+            com.google.cloud.retail.v2.BigQuerySourceOrBuilder>
+        bigQuerySourceBuilder_;
+    /**
+     *
+     *
+     * <pre>
+     * Required. BigQuery input source.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.BigQuerySource big_query_source = 3 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     *
+     * @return Whether the bigQuerySource field is set.
+     */
+    @java.lang.Override
+    public boolean hasBigQuerySource() {
+      return sourceCase_ == 3;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. BigQuery input source.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.BigQuerySource big_query_source = 3 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     *
+     * @return The bigQuerySource.
+     */
+    @java.lang.Override
+    public com.google.cloud.retail.v2.BigQuerySource getBigQuerySource() {
+      if (bigQuerySourceBuilder_ == null) {
+        if (sourceCase_ == 3) {
+          return (com.google.cloud.retail.v2.BigQuerySource) source_;
+        }
+        return com.google.cloud.retail.v2.BigQuerySource.getDefaultInstance();
+      } else {
+        if (sourceCase_ == 3) {
+          return bigQuerySourceBuilder_.getMessage();
+        }
+        return com.google.cloud.retail.v2.BigQuerySource.getDefaultInstance();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. BigQuery input source.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.BigQuerySource big_query_source = 3 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder setBigQuerySource(com.google.cloud.retail.v2.BigQuerySource value) {
+      if (bigQuerySourceBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        source_ = value;
+        onChanged();
+      } else {
+        bigQuerySourceBuilder_.setMessage(value);
+      }
+      sourceCase_ = 3;
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. BigQuery input source.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.BigQuerySource big_query_source = 3 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder setBigQuerySource(
+        com.google.cloud.retail.v2.BigQuerySource.Builder builderForValue) {
+      if (bigQuerySourceBuilder_ == null) {
+        source_ = builderForValue.build();
+        onChanged();
+      } else {
+        bigQuerySourceBuilder_.setMessage(builderForValue.build());
+      }
+      sourceCase_ = 3;
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. BigQuery input source.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.BigQuerySource big_query_source = 3 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder mergeBigQuerySource(com.google.cloud.retail.v2.BigQuerySource value) {
+      if (bigQuerySourceBuilder_ == null) {
+        if (sourceCase_ == 3
+            && source_ != com.google.cloud.retail.v2.BigQuerySource.getDefaultInstance()) {
+          source_ =
+              com.google.cloud.retail.v2.BigQuerySource.newBuilder(
+                      (com.google.cloud.retail.v2.BigQuerySource) source_)
+                  .mergeFrom(value)
+                  .buildPartial();
+        } else {
+          source_ = value;
+        }
+        onChanged();
+      } else {
+        if (sourceCase_ == 3) {
+          bigQuerySourceBuilder_.mergeFrom(value);
+        }
+        bigQuerySourceBuilder_.setMessage(value);
+      }
+      sourceCase_ = 3;
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. BigQuery input source.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.BigQuerySource big_query_source = 3 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder clearBigQuerySource() {
+      if (bigQuerySourceBuilder_ == null) {
+        if (sourceCase_ == 3) {
+          sourceCase_ = 0;
+          source_ = null;
+          onChanged();
+        }
+      } else {
+        if (sourceCase_ == 3) {
+          sourceCase_ = 0;
+          source_ = null;
+        }
+        bigQuerySourceBuilder_.clear();
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. BigQuery input source.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.BigQuerySource big_query_source = 3 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public com.google.cloud.retail.v2.BigQuerySource.Builder getBigQuerySourceBuilder() {
+      return getBigQuerySourceFieldBuilder().getBuilder();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. BigQuery input source.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.BigQuerySource big_query_source = 3 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    @java.lang.Override
+    public com.google.cloud.retail.v2.BigQuerySourceOrBuilder getBigQuerySourceOrBuilder() {
+      if ((sourceCase_ == 3) && (bigQuerySourceBuilder_ != null)) {
+        return bigQuerySourceBuilder_.getMessageOrBuilder();
+      } else {
+        if (sourceCase_ == 3) {
+          return (com.google.cloud.retail.v2.BigQuerySource) source_;
+        }
+        return com.google.cloud.retail.v2.BigQuerySource.getDefaultInstance();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. BigQuery input source.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.BigQuerySource big_query_source = 3 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.cloud.retail.v2.BigQuerySource,
+            com.google.cloud.retail.v2.BigQuerySource.Builder,
+            com.google.cloud.retail.v2.BigQuerySourceOrBuilder>
+        getBigQuerySourceFieldBuilder() {
+      if (bigQuerySourceBuilder_ == null) {
+        if (!(sourceCase_ == 3)) {
+          source_ = com.google.cloud.retail.v2.BigQuerySource.getDefaultInstance();
+        }
+        bigQuerySourceBuilder_ =
+            new com.google.protobuf.SingleFieldBuilderV3<
+                com.google.cloud.retail.v2.BigQuerySource,
+                com.google.cloud.retail.v2.BigQuerySource.Builder,
+                com.google.cloud.retail.v2.BigQuerySourceOrBuilder>(
+                (com.google.cloud.retail.v2.BigQuerySource) source_,
+                getParentForChildren(),
+                isClean());
+        source_ = null;
+      }
+      sourceCase_ = 3;
+      onChanged();
+      ;
+      return bigQuerySourceBuilder_;
+    }
+
+    @java.lang.Override
+    public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.setUnknownFields(unknownFields);
+    }
+
+    @java.lang.Override
+    public final Builder mergeUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.mergeUnknownFields(unknownFields);
+    }
+
+    // @@protoc_insertion_point(builder_scope:google.cloud.retail.v2.UserEventInputConfig)
+  }
+
+  // @@protoc_insertion_point(class_scope:google.cloud.retail.v2.UserEventInputConfig)
+  private static final com.google.cloud.retail.v2.UserEventInputConfig DEFAULT_INSTANCE;
+
+  static {
+    DEFAULT_INSTANCE = new com.google.cloud.retail.v2.UserEventInputConfig();
+  }
+
+  public static com.google.cloud.retail.v2.UserEventInputConfig getDefaultInstance() {
+    return DEFAULT_INSTANCE;
+  }
+
+  private static final com.google.protobuf.Parser<UserEventInputConfig> PARSER =
+      new com.google.protobuf.AbstractParser<UserEventInputConfig>() {
+        @java.lang.Override
+        public UserEventInputConfig parsePartialFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws com.google.protobuf.InvalidProtocolBufferException {
+          return new UserEventInputConfig(input, extensionRegistry);
+        }
+      };
+
+  public static com.google.protobuf.Parser<UserEventInputConfig> parser() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.protobuf.Parser<UserEventInputConfig> getParserForType() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.cloud.retail.v2.UserEventInputConfig getDefaultInstanceForType() {
+    return DEFAULT_INSTANCE;
+  }
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/UserEventInputConfigOrBuilder.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/UserEventInputConfigOrBuilder.java
new file mode 100644
index 00000000..44f156a9
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/UserEventInputConfigOrBuilder.java
@@ -0,0 +1,150 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/import_config.proto
+
+package com.google.cloud.retail.v2;
+
+public interface UserEventInputConfigOrBuilder
+    extends
+    // @@protoc_insertion_point(interface_extends:google.cloud.retail.v2.UserEventInputConfig)
+    com.google.protobuf.MessageOrBuilder {
+
+  /**
+   *
+   *
+   * <pre>
+   * Required. The Inline source for the input content for UserEvents.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.retail.v2.UserEventInlineSource user_event_inline_source = 1 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   *
+   * @return Whether the userEventInlineSource field is set.
+   */
+  boolean hasUserEventInlineSource();
+  /**
+   *
+   *
+   * <pre>
+   * Required. The Inline source for the input content for UserEvents.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.retail.v2.UserEventInlineSource user_event_inline_source = 1 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   *
+   * @return The userEventInlineSource.
+   */
+  com.google.cloud.retail.v2.UserEventInlineSource getUserEventInlineSource();
+  /**
+   *
+   *
+   * <pre>
+   * Required. The Inline source for the input content for UserEvents.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.retail.v2.UserEventInlineSource user_event_inline_source = 1 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   */
+  com.google.cloud.retail.v2.UserEventInlineSourceOrBuilder getUserEventInlineSourceOrBuilder();
+
+  /**
+   *
+   *
+   * <pre>
+   * Required. Google Cloud Storage location for the input content.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.retail.v2.GcsSource gcs_source = 2 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   *
+   * @return Whether the gcsSource field is set.
+   */
+  boolean hasGcsSource();
+  /**
+   *
+   *
+   * <pre>
+   * Required. Google Cloud Storage location for the input content.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.retail.v2.GcsSource gcs_source = 2 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   *
+   * @return The gcsSource.
+   */
+  com.google.cloud.retail.v2.GcsSource getGcsSource();
+  /**
+   *
+   *
+   * <pre>
+   * Required. Google Cloud Storage location for the input content.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.retail.v2.GcsSource gcs_source = 2 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   */
+  com.google.cloud.retail.v2.GcsSourceOrBuilder getGcsSourceOrBuilder();
+
+  /**
+   *
+   *
+   * <pre>
+   * Required. BigQuery input source.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.retail.v2.BigQuerySource big_query_source = 3 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   *
+   * @return Whether the bigQuerySource field is set.
+   */
+  boolean hasBigQuerySource();
+  /**
+   *
+   *
+   * <pre>
+   * Required. BigQuery input source.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.retail.v2.BigQuerySource big_query_source = 3 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   *
+   * @return The bigQuerySource.
+   */
+  com.google.cloud.retail.v2.BigQuerySource getBigQuerySource();
+  /**
+   *
+   *
+   * <pre>
+   * Required. BigQuery input source.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.retail.v2.BigQuerySource big_query_source = 3 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   */
+  com.google.cloud.retail.v2.BigQuerySourceOrBuilder getBigQuerySourceOrBuilder();
+
+  public com.google.cloud.retail.v2.UserEventInputConfig.SourceCase getSourceCase();
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/UserEventOrBuilder.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/UserEventOrBuilder.java
new file mode 100644
index 00000000..ccc43da7
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/UserEventOrBuilder.java
@@ -0,0 +1,776 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/user_event.proto
+
+package com.google.cloud.retail.v2;
+
+public interface UserEventOrBuilder
+    extends
+    // @@protoc_insertion_point(interface_extends:google.cloud.retail.v2.UserEvent)
+    com.google.protobuf.MessageOrBuilder {
+
+  /**
+   *
+   *
+   * <pre>
+   * Required. User event type. Allowed values are:
+   * * `add-to-cart`: Products being added to cart.
+   * * `category-page-view`: Special pages such as sale or promotion pages
+   *   viewed.
+   * * `detail-page-view`: Products detail page viewed.
+   * * `home-page-view`: Homepage viewed.
+   * * `purchase-complete`: User finishing a purchase.
+   * * `search`: Product search.
+   * * `shopping-cart-page-view`: User viewing a shopping cart.
+   * </pre>
+   *
+   * <code>string event_type = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The eventType.
+   */
+  java.lang.String getEventType();
+  /**
+   *
+   *
+   * <pre>
+   * Required. User event type. Allowed values are:
+   * * `add-to-cart`: Products being added to cart.
+   * * `category-page-view`: Special pages such as sale or promotion pages
+   *   viewed.
+   * * `detail-page-view`: Products detail page viewed.
+   * * `home-page-view`: Homepage viewed.
+   * * `purchase-complete`: User finishing a purchase.
+   * * `search`: Product search.
+   * * `shopping-cart-page-view`: User viewing a shopping cart.
+   * </pre>
+   *
+   * <code>string event_type = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The bytes for eventType.
+   */
+  com.google.protobuf.ByteString getEventTypeBytes();
+
+  /**
+   *
+   *
+   * <pre>
+   * Required. A unique identifier for tracking visitors.
+   * For example, this could be implemented with an HTTP cookie, which should be
+   * able to uniquely identify a visitor on a single device. This unique
+   * identifier should not change if the visitor log in/out of the website.
+   * The field must be a UTF-8 encoded string with a length limit of 128
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * </pre>
+   *
+   * <code>string visitor_id = 2 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The visitorId.
+   */
+  java.lang.String getVisitorId();
+  /**
+   *
+   *
+   * <pre>
+   * Required. A unique identifier for tracking visitors.
+   * For example, this could be implemented with an HTTP cookie, which should be
+   * able to uniquely identify a visitor on a single device. This unique
+   * identifier should not change if the visitor log in/out of the website.
+   * The field must be a UTF-8 encoded string with a length limit of 128
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * </pre>
+   *
+   * <code>string visitor_id = 2 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The bytes for visitorId.
+   */
+  com.google.protobuf.ByteString getVisitorIdBytes();
+
+  /**
+   *
+   *
+   * <pre>
+   * Only required for
+   * [UserEventService.ImportUserEvents][google.cloud.retail.v2.UserEventService.ImportUserEvents]
+   * method. Timestamp of when the user event happened.
+   * </pre>
+   *
+   * <code>.google.protobuf.Timestamp event_time = 3;</code>
+   *
+   * @return Whether the eventTime field is set.
+   */
+  boolean hasEventTime();
+  /**
+   *
+   *
+   * <pre>
+   * Only required for
+   * [UserEventService.ImportUserEvents][google.cloud.retail.v2.UserEventService.ImportUserEvents]
+   * method. Timestamp of when the user event happened.
+   * </pre>
+   *
+   * <code>.google.protobuf.Timestamp event_time = 3;</code>
+   *
+   * @return The eventTime.
+   */
+  com.google.protobuf.Timestamp getEventTime();
+  /**
+   *
+   *
+   * <pre>
+   * Only required for
+   * [UserEventService.ImportUserEvents][google.cloud.retail.v2.UserEventService.ImportUserEvents]
+   * method. Timestamp of when the user event happened.
+   * </pre>
+   *
+   * <code>.google.protobuf.Timestamp event_time = 3;</code>
+   */
+  com.google.protobuf.TimestampOrBuilder getEventTimeOrBuilder();
+
+  /**
+   *
+   *
+   * <pre>
+   * A list of identifiers for the independent experiment groups this user event
+   * belongs to. This is used to distinguish between user events associated with
+   * different experiment setups (e.g. using Retail API, using different
+   * recommendation models).
+   * </pre>
+   *
+   * <code>repeated string experiment_ids = 4;</code>
+   *
+   * @return A list containing the experimentIds.
+   */
+  java.util.List<java.lang.String> getExperimentIdsList();
+  /**
+   *
+   *
+   * <pre>
+   * A list of identifiers for the independent experiment groups this user event
+   * belongs to. This is used to distinguish between user events associated with
+   * different experiment setups (e.g. using Retail API, using different
+   * recommendation models).
+   * </pre>
+   *
+   * <code>repeated string experiment_ids = 4;</code>
+   *
+   * @return The count of experimentIds.
+   */
+  int getExperimentIdsCount();
+  /**
+   *
+   *
+   * <pre>
+   * A list of identifiers for the independent experiment groups this user event
+   * belongs to. This is used to distinguish between user events associated with
+   * different experiment setups (e.g. using Retail API, using different
+   * recommendation models).
+   * </pre>
+   *
+   * <code>repeated string experiment_ids = 4;</code>
+   *
+   * @param index The index of the element to return.
+   * @return The experimentIds at the given index.
+   */
+  java.lang.String getExperimentIds(int index);
+  /**
+   *
+   *
+   * <pre>
+   * A list of identifiers for the independent experiment groups this user event
+   * belongs to. This is used to distinguish between user events associated with
+   * different experiment setups (e.g. using Retail API, using different
+   * recommendation models).
+   * </pre>
+   *
+   * <code>repeated string experiment_ids = 4;</code>
+   *
+   * @param index The index of the value to return.
+   * @return The bytes of the experimentIds at the given index.
+   */
+  com.google.protobuf.ByteString getExperimentIdsBytes(int index);
+
+  /**
+   *
+   *
+   * <pre>
+   * Highly recommended for user events that are the result of
+   * [PredictionService.Predict][google.cloud.retail.v2.PredictionService.Predict].
+   * This field enables accurate attribution of recommendation model
+   * performance.
+   * The value must be a valid
+   * [PredictResponse.attribution_token][google.cloud.retail.v2.PredictResponse.attribution_token]
+   * for user events that are the result of
+   * [PredictionService.Predict][google.cloud.retail.v2.PredictionService.Predict].
+   * This token enables us to accurately attribute page view or purchase back to
+   * the event and the particular predict response containing this
+   * clicked/purchased product. If user clicks on product K in the
+   * recommendation results, pass
+   * [PredictResponse.attribution_token][google.cloud.retail.v2.PredictResponse.attribution_token]
+   * as a URL parameter to product K's page. When recording events on product
+   * K's page, log the
+   * [PredictResponse.attribution_token][google.cloud.retail.v2.PredictResponse.attribution_token]
+   * to this field.
+   * </pre>
+   *
+   * <code>string attribution_token = 5;</code>
+   *
+   * @return The attributionToken.
+   */
+  java.lang.String getAttributionToken();
+  /**
+   *
+   *
+   * <pre>
+   * Highly recommended for user events that are the result of
+   * [PredictionService.Predict][google.cloud.retail.v2.PredictionService.Predict].
+   * This field enables accurate attribution of recommendation model
+   * performance.
+   * The value must be a valid
+   * [PredictResponse.attribution_token][google.cloud.retail.v2.PredictResponse.attribution_token]
+   * for user events that are the result of
+   * [PredictionService.Predict][google.cloud.retail.v2.PredictionService.Predict].
+   * This token enables us to accurately attribute page view or purchase back to
+   * the event and the particular predict response containing this
+   * clicked/purchased product. If user clicks on product K in the
+   * recommendation results, pass
+   * [PredictResponse.attribution_token][google.cloud.retail.v2.PredictResponse.attribution_token]
+   * as a URL parameter to product K's page. When recording events on product
+   * K's page, log the
+   * [PredictResponse.attribution_token][google.cloud.retail.v2.PredictResponse.attribution_token]
+   * to this field.
+   * </pre>
+   *
+   * <code>string attribution_token = 5;</code>
+   *
+   * @return The bytes for attributionToken.
+   */
+  com.google.protobuf.ByteString getAttributionTokenBytes();
+
+  /**
+   *
+   *
+   * <pre>
+   * The main product details related to the event.
+   * This field is required for the following event types:
+   * * `add-to-cart`
+   * * `detail-page-view`
+   * * `purchase-complete`
+   * In a `search` event, this field represents the products returned to the end
+   * user on the current page (the end user may have not finished broswing the
+   * whole page yet). When a new page is returned to the end user, after
+   * pagination/filtering/ordering even for the same query, a new `search` event
+   * with different
+   * [product_details][google.cloud.retail.v2.UserEvent.product_details] is
+   * desired. The end user may have not finished broswing the whole page yet.
+   * </pre>
+   *
+   * <code>repeated .google.cloud.retail.v2.ProductDetail product_details = 6;</code>
+   */
+  java.util.List<com.google.cloud.retail.v2.ProductDetail> getProductDetailsList();
+  /**
+   *
+   *
+   * <pre>
+   * The main product details related to the event.
+   * This field is required for the following event types:
+   * * `add-to-cart`
+   * * `detail-page-view`
+   * * `purchase-complete`
+   * In a `search` event, this field represents the products returned to the end
+   * user on the current page (the end user may have not finished broswing the
+   * whole page yet). When a new page is returned to the end user, after
+   * pagination/filtering/ordering even for the same query, a new `search` event
+   * with different
+   * [product_details][google.cloud.retail.v2.UserEvent.product_details] is
+   * desired. The end user may have not finished broswing the whole page yet.
+   * </pre>
+   *
+   * <code>repeated .google.cloud.retail.v2.ProductDetail product_details = 6;</code>
+   */
+  com.google.cloud.retail.v2.ProductDetail getProductDetails(int index);
+  /**
+   *
+   *
+   * <pre>
+   * The main product details related to the event.
+   * This field is required for the following event types:
+   * * `add-to-cart`
+   * * `detail-page-view`
+   * * `purchase-complete`
+   * In a `search` event, this field represents the products returned to the end
+   * user on the current page (the end user may have not finished broswing the
+   * whole page yet). When a new page is returned to the end user, after
+   * pagination/filtering/ordering even for the same query, a new `search` event
+   * with different
+   * [product_details][google.cloud.retail.v2.UserEvent.product_details] is
+   * desired. The end user may have not finished broswing the whole page yet.
+   * </pre>
+   *
+   * <code>repeated .google.cloud.retail.v2.ProductDetail product_details = 6;</code>
+   */
+  int getProductDetailsCount();
+  /**
+   *
+   *
+   * <pre>
+   * The main product details related to the event.
+   * This field is required for the following event types:
+   * * `add-to-cart`
+   * * `detail-page-view`
+   * * `purchase-complete`
+   * In a `search` event, this field represents the products returned to the end
+   * user on the current page (the end user may have not finished broswing the
+   * whole page yet). When a new page is returned to the end user, after
+   * pagination/filtering/ordering even for the same query, a new `search` event
+   * with different
+   * [product_details][google.cloud.retail.v2.UserEvent.product_details] is
+   * desired. The end user may have not finished broswing the whole page yet.
+   * </pre>
+   *
+   * <code>repeated .google.cloud.retail.v2.ProductDetail product_details = 6;</code>
+   */
+  java.util.List<? extends com.google.cloud.retail.v2.ProductDetailOrBuilder>
+      getProductDetailsOrBuilderList();
+  /**
+   *
+   *
+   * <pre>
+   * The main product details related to the event.
+   * This field is required for the following event types:
+   * * `add-to-cart`
+   * * `detail-page-view`
+   * * `purchase-complete`
+   * In a `search` event, this field represents the products returned to the end
+   * user on the current page (the end user may have not finished broswing the
+   * whole page yet). When a new page is returned to the end user, after
+   * pagination/filtering/ordering even for the same query, a new `search` event
+   * with different
+   * [product_details][google.cloud.retail.v2.UserEvent.product_details] is
+   * desired. The end user may have not finished broswing the whole page yet.
+   * </pre>
+   *
+   * <code>repeated .google.cloud.retail.v2.ProductDetail product_details = 6;</code>
+   */
+  com.google.cloud.retail.v2.ProductDetailOrBuilder getProductDetailsOrBuilder(int index);
+
+  /**
+   *
+   *
+   * <pre>
+   * Extra user event features to include in the recommendation model.
+   * The key must be a UTF-8 encoded string with a length limit of 5,000
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * For product recommendation, an example of extra user information is
+   * traffic_channel, i.e. how user arrives at the site. Users can arrive
+   * at the site by coming to the site directly, or coming through Google
+   * search, and etc.
+   * </pre>
+   *
+   * <code>map&lt;string, .google.cloud.retail.v2.CustomAttribute&gt; attributes = 7;</code>
+   */
+  int getAttributesCount();
+  /**
+   *
+   *
+   * <pre>
+   * Extra user event features to include in the recommendation model.
+   * The key must be a UTF-8 encoded string with a length limit of 5,000
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * For product recommendation, an example of extra user information is
+   * traffic_channel, i.e. how user arrives at the site. Users can arrive
+   * at the site by coming to the site directly, or coming through Google
+   * search, and etc.
+   * </pre>
+   *
+   * <code>map&lt;string, .google.cloud.retail.v2.CustomAttribute&gt; attributes = 7;</code>
+   */
+  boolean containsAttributes(java.lang.String key);
+  /** Use {@link #getAttributesMap()} instead. */
+  @java.lang.Deprecated
+  java.util.Map<java.lang.String, com.google.cloud.retail.v2.CustomAttribute> getAttributes();
+  /**
+   *
+   *
+   * <pre>
+   * Extra user event features to include in the recommendation model.
+   * The key must be a UTF-8 encoded string with a length limit of 5,000
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * For product recommendation, an example of extra user information is
+   * traffic_channel, i.e. how user arrives at the site. Users can arrive
+   * at the site by coming to the site directly, or coming through Google
+   * search, and etc.
+   * </pre>
+   *
+   * <code>map&lt;string, .google.cloud.retail.v2.CustomAttribute&gt; attributes = 7;</code>
+   */
+  java.util.Map<java.lang.String, com.google.cloud.retail.v2.CustomAttribute> getAttributesMap();
+  /**
+   *
+   *
+   * <pre>
+   * Extra user event features to include in the recommendation model.
+   * The key must be a UTF-8 encoded string with a length limit of 5,000
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * For product recommendation, an example of extra user information is
+   * traffic_channel, i.e. how user arrives at the site. Users can arrive
+   * at the site by coming to the site directly, or coming through Google
+   * search, and etc.
+   * </pre>
+   *
+   * <code>map&lt;string, .google.cloud.retail.v2.CustomAttribute&gt; attributes = 7;</code>
+   */
+  com.google.cloud.retail.v2.CustomAttribute getAttributesOrDefault(
+      java.lang.String key, com.google.cloud.retail.v2.CustomAttribute defaultValue);
+  /**
+   *
+   *
+   * <pre>
+   * Extra user event features to include in the recommendation model.
+   * The key must be a UTF-8 encoded string with a length limit of 5,000
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * For product recommendation, an example of extra user information is
+   * traffic_channel, i.e. how user arrives at the site. Users can arrive
+   * at the site by coming to the site directly, or coming through Google
+   * search, and etc.
+   * </pre>
+   *
+   * <code>map&lt;string, .google.cloud.retail.v2.CustomAttribute&gt; attributes = 7;</code>
+   */
+  com.google.cloud.retail.v2.CustomAttribute getAttributesOrThrow(java.lang.String key);
+
+  /**
+   *
+   *
+   * <pre>
+   * The id or name of the associated shopping cart. This id is used
+   * to associate multiple items added or present in the cart before purchase.
+   * This can only be set for `add-to-cart`, `purchase-complete`, or
+   * `shopping-cart-page-view` events.
+   * </pre>
+   *
+   * <code>string cart_id = 8;</code>
+   *
+   * @return The cartId.
+   */
+  java.lang.String getCartId();
+  /**
+   *
+   *
+   * <pre>
+   * The id or name of the associated shopping cart. This id is used
+   * to associate multiple items added or present in the cart before purchase.
+   * This can only be set for `add-to-cart`, `purchase-complete`, or
+   * `shopping-cart-page-view` events.
+   * </pre>
+   *
+   * <code>string cart_id = 8;</code>
+   *
+   * @return The bytes for cartId.
+   */
+  com.google.protobuf.ByteString getCartIdBytes();
+
+  /**
+   *
+   *
+   * <pre>
+   * A transaction represents the entire purchase transaction.
+   * Required for `purchase-complete` events. Other event types should not set
+   * this field. Otherwise, an INVALID_ARGUMENT error is returned.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.PurchaseTransaction purchase_transaction = 9;</code>
+   *
+   * @return Whether the purchaseTransaction field is set.
+   */
+  boolean hasPurchaseTransaction();
+  /**
+   *
+   *
+   * <pre>
+   * A transaction represents the entire purchase transaction.
+   * Required for `purchase-complete` events. Other event types should not set
+   * this field. Otherwise, an INVALID_ARGUMENT error is returned.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.PurchaseTransaction purchase_transaction = 9;</code>
+   *
+   * @return The purchaseTransaction.
+   */
+  com.google.cloud.retail.v2.PurchaseTransaction getPurchaseTransaction();
+  /**
+   *
+   *
+   * <pre>
+   * A transaction represents the entire purchase transaction.
+   * Required for `purchase-complete` events. Other event types should not set
+   * this field. Otherwise, an INVALID_ARGUMENT error is returned.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.PurchaseTransaction purchase_transaction = 9;</code>
+   */
+  com.google.cloud.retail.v2.PurchaseTransactionOrBuilder getPurchaseTransactionOrBuilder();
+
+  /**
+   *
+   *
+   * <pre>
+   * The user's search query.
+   * The value must be a UTF-8 encoded string with a length limit of 5,000
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * Required for `search` events. Other event types should not set this field.
+   * Otherwise, an INVALID_ARGUMENT error is returned.
+   * </pre>
+   *
+   * <code>string search_query = 10;</code>
+   *
+   * @return The searchQuery.
+   */
+  java.lang.String getSearchQuery();
+  /**
+   *
+   *
+   * <pre>
+   * The user's search query.
+   * The value must be a UTF-8 encoded string with a length limit of 5,000
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * Required for `search` events. Other event types should not set this field.
+   * Otherwise, an INVALID_ARGUMENT error is returned.
+   * </pre>
+   *
+   * <code>string search_query = 10;</code>
+   *
+   * @return The bytes for searchQuery.
+   */
+  com.google.protobuf.ByteString getSearchQueryBytes();
+
+  /**
+   *
+   *
+   * <pre>
+   * The categories associated with a category page.
+   * To represent full path of category, use '&gt;' sign to separate different
+   * hierarchies. If '&gt;' is part of the category name, please replace it with
+   * other character(s).
+   * Category pages include special pages such as sales or promotions. For
+   * instance, a special sale page may have the category hierarchy:
+   * "pageCategories" : ["Sales &gt; 2017 Black Friday Deals"].
+   * Required for `category-page-view` events. Other event types should not set
+   * this field. Otherwise, an INVALID_ARGUMENT error is returned.
+   * </pre>
+   *
+   * <code>repeated string page_categories = 11;</code>
+   *
+   * @return A list containing the pageCategories.
+   */
+  java.util.List<java.lang.String> getPageCategoriesList();
+  /**
+   *
+   *
+   * <pre>
+   * The categories associated with a category page.
+   * To represent full path of category, use '&gt;' sign to separate different
+   * hierarchies. If '&gt;' is part of the category name, please replace it with
+   * other character(s).
+   * Category pages include special pages such as sales or promotions. For
+   * instance, a special sale page may have the category hierarchy:
+   * "pageCategories" : ["Sales &gt; 2017 Black Friday Deals"].
+   * Required for `category-page-view` events. Other event types should not set
+   * this field. Otherwise, an INVALID_ARGUMENT error is returned.
+   * </pre>
+   *
+   * <code>repeated string page_categories = 11;</code>
+   *
+   * @return The count of pageCategories.
+   */
+  int getPageCategoriesCount();
+  /**
+   *
+   *
+   * <pre>
+   * The categories associated with a category page.
+   * To represent full path of category, use '&gt;' sign to separate different
+   * hierarchies. If '&gt;' is part of the category name, please replace it with
+   * other character(s).
+   * Category pages include special pages such as sales or promotions. For
+   * instance, a special sale page may have the category hierarchy:
+   * "pageCategories" : ["Sales &gt; 2017 Black Friday Deals"].
+   * Required for `category-page-view` events. Other event types should not set
+   * this field. Otherwise, an INVALID_ARGUMENT error is returned.
+   * </pre>
+   *
+   * <code>repeated string page_categories = 11;</code>
+   *
+   * @param index The index of the element to return.
+   * @return The pageCategories at the given index.
+   */
+  java.lang.String getPageCategories(int index);
+  /**
+   *
+   *
+   * <pre>
+   * The categories associated with a category page.
+   * To represent full path of category, use '&gt;' sign to separate different
+   * hierarchies. If '&gt;' is part of the category name, please replace it with
+   * other character(s).
+   * Category pages include special pages such as sales or promotions. For
+   * instance, a special sale page may have the category hierarchy:
+   * "pageCategories" : ["Sales &gt; 2017 Black Friday Deals"].
+   * Required for `category-page-view` events. Other event types should not set
+   * this field. Otherwise, an INVALID_ARGUMENT error is returned.
+   * </pre>
+   *
+   * <code>repeated string page_categories = 11;</code>
+   *
+   * @param index The index of the value to return.
+   * @return The bytes of the pageCategories at the given index.
+   */
+  com.google.protobuf.ByteString getPageCategoriesBytes(int index);
+
+  /**
+   *
+   *
+   * <pre>
+   * User information.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.UserInfo user_info = 12;</code>
+   *
+   * @return Whether the userInfo field is set.
+   */
+  boolean hasUserInfo();
+  /**
+   *
+   *
+   * <pre>
+   * User information.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.UserInfo user_info = 12;</code>
+   *
+   * @return The userInfo.
+   */
+  com.google.cloud.retail.v2.UserInfo getUserInfo();
+  /**
+   *
+   *
+   * <pre>
+   * User information.
+   * </pre>
+   *
+   * <code>.google.cloud.retail.v2.UserInfo user_info = 12;</code>
+   */
+  com.google.cloud.retail.v2.UserInfoOrBuilder getUserInfoOrBuilder();
+
+  /**
+   *
+   *
+   * <pre>
+   * Complete URL (window.location.href) of the user's current page.
+   * When using the client side event reporting with JavaScript pixel and Google
+   * Tag Manager, this value is filled in automatically. Maximum length 5,000
+   * characters.
+   * </pre>
+   *
+   * <code>string uri = 13;</code>
+   *
+   * @return The uri.
+   */
+  java.lang.String getUri();
+  /**
+   *
+   *
+   * <pre>
+   * Complete URL (window.location.href) of the user's current page.
+   * When using the client side event reporting with JavaScript pixel and Google
+   * Tag Manager, this value is filled in automatically. Maximum length 5,000
+   * characters.
+   * </pre>
+   *
+   * <code>string uri = 13;</code>
+   *
+   * @return The bytes for uri.
+   */
+  com.google.protobuf.ByteString getUriBytes();
+
+  /**
+   *
+   *
+   * <pre>
+   * The referrer URL of the current page.
+   * When using the client side event reporting with JavaScript pixel and Google
+   * Tag Manager, this value is filled in automatically.
+   * </pre>
+   *
+   * <code>string referrer_uri = 14;</code>
+   *
+   * @return The referrerUri.
+   */
+  java.lang.String getReferrerUri();
+  /**
+   *
+   *
+   * <pre>
+   * The referrer URL of the current page.
+   * When using the client side event reporting with JavaScript pixel and Google
+   * Tag Manager, this value is filled in automatically.
+   * </pre>
+   *
+   * <code>string referrer_uri = 14;</code>
+   *
+   * @return The bytes for referrerUri.
+   */
+  com.google.protobuf.ByteString getReferrerUriBytes();
+
+  /**
+   *
+   *
+   * <pre>
+   * A unique id of a web page view.
+   * This should be kept the same for all user events triggered from the same
+   * pageview. For example, an item detail page view could trigger multiple
+   * events as the user is browsing the page. The `pageViewId` property should
+   * be kept the same for all these events so that they can be grouped together
+   * properly.
+   * When using the client side event reporting with JavaScript pixel and Google
+   * Tag Manager, this value is filled in automatically.
+   * </pre>
+   *
+   * <code>string page_view_id = 15;</code>
+   *
+   * @return The pageViewId.
+   */
+  java.lang.String getPageViewId();
+  /**
+   *
+   *
+   * <pre>
+   * A unique id of a web page view.
+   * This should be kept the same for all user events triggered from the same
+   * pageview. For example, an item detail page view could trigger multiple
+   * events as the user is browsing the page. The `pageViewId` property should
+   * be kept the same for all these events so that they can be grouped together
+   * properly.
+   * When using the client side event reporting with JavaScript pixel and Google
+   * Tag Manager, this value is filled in automatically.
+   * </pre>
+   *
+   * <code>string page_view_id = 15;</code>
+   *
+   * @return The bytes for pageViewId.
+   */
+  com.google.protobuf.ByteString getPageViewIdBytes();
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/UserEventProto.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/UserEventProto.java
new file mode 100644
index 00000000..d7ff4ff4
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/UserEventProto.java
@@ -0,0 +1,161 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/user_event.proto
+
+package com.google.cloud.retail.v2;
+
+public final class UserEventProto {
+  private UserEventProto() {}
+
+  public static void registerAllExtensions(com.google.protobuf.ExtensionRegistryLite registry) {}
+
+  public static void registerAllExtensions(com.google.protobuf.ExtensionRegistry registry) {
+    registerAllExtensions((com.google.protobuf.ExtensionRegistryLite) registry);
+  }
+
+  static final com.google.protobuf.Descriptors.Descriptor
+      internal_static_google_cloud_retail_v2_UserEvent_descriptor;
+  static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_google_cloud_retail_v2_UserEvent_fieldAccessorTable;
+  static final com.google.protobuf.Descriptors.Descriptor
+      internal_static_google_cloud_retail_v2_UserEvent_AttributesEntry_descriptor;
+  static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_google_cloud_retail_v2_UserEvent_AttributesEntry_fieldAccessorTable;
+  static final com.google.protobuf.Descriptors.Descriptor
+      internal_static_google_cloud_retail_v2_ProductDetail_descriptor;
+  static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_google_cloud_retail_v2_ProductDetail_fieldAccessorTable;
+  static final com.google.protobuf.Descriptors.Descriptor
+      internal_static_google_cloud_retail_v2_PurchaseTransaction_descriptor;
+  static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_google_cloud_retail_v2_PurchaseTransaction_fieldAccessorTable;
+
+  public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
+    return descriptor;
+  }
+
+  private static com.google.protobuf.Descriptors.FileDescriptor descriptor;
+
+  static {
+    java.lang.String[] descriptorData = {
+      "\n\'google/cloud/retail/v2/user_event.prot"
+          + "o\022\026google.cloud.retail.v2\032\034google/api/an"
+          + "notations.proto\032\037google/api/field_behavi"
+          + "or.proto\032#google/cloud/retail/v2/common."
+          + "proto\032$google/cloud/retail/v2/product.pr"
+          + "oto\032\037google/protobuf/timestamp.proto\032\036go"
+          + "ogle/protobuf/wrappers.proto\"\374\004\n\tUserEve"
+          + "nt\022\027\n\nevent_type\030\001 \001(\tB\003\340A\002\022\027\n\nvisitor_i"
+          + "d\030\002 \001(\tB\003\340A\002\022.\n\nevent_time\030\003 \001(\0132\032.googl"
+          + "e.protobuf.Timestamp\022\026\n\016experiment_ids\030\004"
+          + " \003(\t\022\031\n\021attribution_token\030\005 \001(\t\022>\n\017produ"
+          + "ct_details\030\006 \003(\0132%.google.cloud.retail.v"
+          + "2.ProductDetail\022E\n\nattributes\030\007 \003(\01321.go"
+          + "ogle.cloud.retail.v2.UserEvent.Attribute"
+          + "sEntry\022\017\n\007cart_id\030\010 \001(\t\022I\n\024purchase_tran"
+          + "saction\030\t \001(\0132+.google.cloud.retail.v2.P"
+          + "urchaseTransaction\022\024\n\014search_query\030\n \001(\t"
+          + "\022\027\n\017page_categories\030\013 \003(\t\0223\n\tuser_info\030\014"
+          + " \001(\0132 .google.cloud.retail.v2.UserInfo\022\013"
+          + "\n\003uri\030\r \001(\t\022\024\n\014referrer_uri\030\016 \001(\t\022\024\n\014pag"
+          + "e_view_id\030\017 \001(\t\032Z\n\017AttributesEntry\022\013\n\003ke"
+          + "y\030\001 \001(\t\0226\n\005value\030\002 \001(\0132\'.google.cloud.re"
+          + "tail.v2.CustomAttribute:\0028\001\"u\n\rProductDe"
+          + "tail\0225\n\007product\030\001 \001(\0132\037.google.cloud.ret"
+          + "ail.v2.ProductB\003\340A\002\022-\n\010quantity\030\002 \001(\0132\033."
+          + "google.protobuf.Int32Value\"n\n\023PurchaseTr"
+          + "ansaction\022\n\n\002id\030\001 \001(\t\022\024\n\007revenue\030\002 \001(\002B\003"
+          + "\340A\002\022\013\n\003tax\030\003 \001(\002\022\014\n\004cost\030\004 \001(\002\022\032\n\rcurren"
+          + "cy_code\030\005 \001(\tB\003\340A\002B\303\001\n\032com.google.cloud."
+          + "retail.v2B\016UserEventProtoP\001Z<google.gola"
+          + "ng.org/genproto/googleapis/cloud/retail/"
+          + "v2;retail\242\002\006RETAIL\252\002\026Google.Cloud.Retail"
+          + ".V2\312\002\026Google\\Cloud\\Retail\\V2\352\002\031Google::C"
+          + "loud::Retail::V2b\006proto3"
+    };
+    descriptor =
+        com.google.protobuf.Descriptors.FileDescriptor.internalBuildGeneratedFileFrom(
+            descriptorData,
+            new com.google.protobuf.Descriptors.FileDescriptor[] {
+              com.google.api.AnnotationsProto.getDescriptor(),
+              com.google.api.FieldBehaviorProto.getDescriptor(),
+              com.google.cloud.retail.v2.CommonProto.getDescriptor(),
+              com.google.cloud.retail.v2.ProductProto.getDescriptor(),
+              com.google.protobuf.TimestampProto.getDescriptor(),
+              com.google.protobuf.WrappersProto.getDescriptor(),
+            });
+    internal_static_google_cloud_retail_v2_UserEvent_descriptor =
+        getDescriptor().getMessageTypes().get(0);
+    internal_static_google_cloud_retail_v2_UserEvent_fieldAccessorTable =
+        new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+            internal_static_google_cloud_retail_v2_UserEvent_descriptor,
+            new java.lang.String[] {
+              "EventType",
+              "VisitorId",
+              "EventTime",
+              "ExperimentIds",
+              "AttributionToken",
+              "ProductDetails",
+              "Attributes",
+              "CartId",
+              "PurchaseTransaction",
+              "SearchQuery",
+              "PageCategories",
+              "UserInfo",
+              "Uri",
+              "ReferrerUri",
+              "PageViewId",
+            });
+    internal_static_google_cloud_retail_v2_UserEvent_AttributesEntry_descriptor =
+        internal_static_google_cloud_retail_v2_UserEvent_descriptor.getNestedTypes().get(0);
+    internal_static_google_cloud_retail_v2_UserEvent_AttributesEntry_fieldAccessorTable =
+        new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+            internal_static_google_cloud_retail_v2_UserEvent_AttributesEntry_descriptor,
+            new java.lang.String[] {
+              "Key", "Value",
+            });
+    internal_static_google_cloud_retail_v2_ProductDetail_descriptor =
+        getDescriptor().getMessageTypes().get(1);
+    internal_static_google_cloud_retail_v2_ProductDetail_fieldAccessorTable =
+        new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+            internal_static_google_cloud_retail_v2_ProductDetail_descriptor,
+            new java.lang.String[] {
+              "Product", "Quantity",
+            });
+    internal_static_google_cloud_retail_v2_PurchaseTransaction_descriptor =
+        getDescriptor().getMessageTypes().get(2);
+    internal_static_google_cloud_retail_v2_PurchaseTransaction_fieldAccessorTable =
+        new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+            internal_static_google_cloud_retail_v2_PurchaseTransaction_descriptor,
+            new java.lang.String[] {
+              "Id", "Revenue", "Tax", "Cost", "CurrencyCode",
+            });
+    com.google.protobuf.ExtensionRegistry registry =
+        com.google.protobuf.ExtensionRegistry.newInstance();
+    registry.add(com.google.api.FieldBehaviorProto.fieldBehavior);
+    com.google.protobuf.Descriptors.FileDescriptor.internalUpdateFileDescriptor(
+        descriptor, registry);
+    com.google.api.AnnotationsProto.getDescriptor();
+    com.google.api.FieldBehaviorProto.getDescriptor();
+    com.google.cloud.retail.v2.CommonProto.getDescriptor();
+    com.google.cloud.retail.v2.ProductProto.getDescriptor();
+    com.google.protobuf.TimestampProto.getDescriptor();
+    com.google.protobuf.WrappersProto.getDescriptor();
+  }
+
+  // @@protoc_insertion_point(outer_class_scope)
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/UserEventServiceProto.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/UserEventServiceProto.java
new file mode 100644
index 00000000..e3df490c
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/UserEventServiceProto.java
@@ -0,0 +1,190 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/user_event_service.proto
+
+package com.google.cloud.retail.v2;
+
+public final class UserEventServiceProto {
+  private UserEventServiceProto() {}
+
+  public static void registerAllExtensions(com.google.protobuf.ExtensionRegistryLite registry) {}
+
+  public static void registerAllExtensions(com.google.protobuf.ExtensionRegistry registry) {
+    registerAllExtensions((com.google.protobuf.ExtensionRegistryLite) registry);
+  }
+
+  static final com.google.protobuf.Descriptors.Descriptor
+      internal_static_google_cloud_retail_v2_WriteUserEventRequest_descriptor;
+  static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_google_cloud_retail_v2_WriteUserEventRequest_fieldAccessorTable;
+  static final com.google.protobuf.Descriptors.Descriptor
+      internal_static_google_cloud_retail_v2_CollectUserEventRequest_descriptor;
+  static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_google_cloud_retail_v2_CollectUserEventRequest_fieldAccessorTable;
+  static final com.google.protobuf.Descriptors.Descriptor
+      internal_static_google_cloud_retail_v2_RejoinUserEventsRequest_descriptor;
+  static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_google_cloud_retail_v2_RejoinUserEventsRequest_fieldAccessorTable;
+  static final com.google.protobuf.Descriptors.Descriptor
+      internal_static_google_cloud_retail_v2_RejoinUserEventsResponse_descriptor;
+  static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_google_cloud_retail_v2_RejoinUserEventsResponse_fieldAccessorTable;
+  static final com.google.protobuf.Descriptors.Descriptor
+      internal_static_google_cloud_retail_v2_RejoinUserEventsMetadata_descriptor;
+  static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_google_cloud_retail_v2_RejoinUserEventsMetadata_fieldAccessorTable;
+
+  public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
+    return descriptor;
+  }
+
+  private static com.google.protobuf.Descriptors.FileDescriptor descriptor;
+
+  static {
+    java.lang.String[] descriptorData = {
+      "\n/google/cloud/retail/v2/user_event_serv"
+          + "ice.proto\022\026google.cloud.retail.v2\032\034googl"
+          + "e/api/annotations.proto\032\027google/api/clie"
+          + "nt.proto\032\037google/api/field_behavior.prot"
+          + "o\032\031google/api/httpbody.proto\032*google/clo"
+          + "ud/retail/v2/import_config.proto\032)google"
+          + "/cloud/retail/v2/purge_config.proto\032\'goo"
+          + "gle/cloud/retail/v2/user_event.proto\032#go"
+          + "ogle/longrunning/operations.proto\"h\n\025Wri"
+          + "teUserEventRequest\022\023\n\006parent\030\001 \001(\tB\003\340A\002\022"
+          + ":\n\nuser_event\030\002 \001(\0132!.google.cloud.retai"
+          + "l.v2.UserEventB\003\340A\002\"a\n\027CollectUserEventR"
+          + "equest\022\023\n\006parent\030\001 \001(\tB\003\340A\002\022\027\n\nuser_even"
+          + "t\030\002 \001(\tB\003\340A\002\022\013\n\003uri\030\003 \001(\t\022\013\n\003ets\030\004 \001(\003\"\376"
+          + "\001\n\027RejoinUserEventsRequest\022\023\n\006parent\030\001 \001"
+          + "(\tB\003\340A\002\022e\n\027user_event_rejoin_scope\030\002 \001(\016"
+          + "2D.google.cloud.retail.v2.RejoinUserEven"
+          + "tsRequest.UserEventRejoinScope\"g\n\024UserEv"
+          + "entRejoinScope\022\'\n#USER_EVENT_REJOIN_SCOP"
+          + "E_UNSPECIFIED\020\000\022\021\n\rJOINED_EVENTS\020\001\022\023\n\017UN"
+          + "JOINED_EVENTS\020\002\">\n\030RejoinUserEventsRespo"
+          + "nse\022\"\n\032rejoined_user_events_count\030\001 \001(\003\""
+          + "\032\n\030RejoinUserEventsMetadata2\277\t\n\020UserEven"
+          + "tService\022\267\001\n\016WriteUserEvent\022-.google.clo"
+          + "ud.retail.v2.WriteUserEventRequest\032!.goo"
+          + "gle.cloud.retail.v2.UserEvent\"S\202\323\344\223\002M\"?/"
+          + "v2/{parent=projects/*/locations/*/catalo"
+          + "gs/*}/userEvents:write:\nuser_event\022\244\001\n\020C"
+          + "ollectUserEvent\022/.google.cloud.retail.v2"
+          + ".CollectUserEventRequest\032\024.google.api.Ht"
+          + "tpBody\"I\202\323\344\223\002C\022A/v2/{parent=projects/*/l"
+          + "ocations/*/catalogs/*}/userEvents:collec"
+          + "t\022\206\002\n\017PurgeUserEvents\022..google.cloud.ret"
+          + "ail.v2.PurgeUserEventsRequest\032\035.google.l"
+          + "ongrunning.Operation\"\243\001\202\323\344\223\002D\"?/v2/{pare"
+          + "nt=projects/*/locations/*/catalogs/*}/us"
+          + "erEvents:purge:\001*\312AV\n.google.cloud.retai"
+          + "l.v2.PurgeUserEventsResponse\022$google.clo"
+          + "ud.retail.v2.PurgeMetadata\022\213\002\n\020ImportUse"
+          + "rEvents\022/.google.cloud.retail.v2.ImportU"
+          + "serEventsRequest\032\035.google.longrunning.Op"
+          + "eration\"\246\001\202\323\344\223\002E\"@/v2/{parent=projects/*"
+          + "/locations/*/catalogs/*}/userEvents:impo"
+          + "rt:\001*\312AX\n/google.cloud.retail.v2.ImportU"
+          + "serEventsResponse\022%google.cloud.retail.v"
+          + "2.ImportMetadata\022\347\001\n\020RejoinUserEvents\022/."
+          + "google.cloud.retail.v2.RejoinUserEventsR"
+          + "equest\032\035.google.longrunning.Operation\"\202\001"
+          + "\202\323\344\223\002E\"@/v2/{parent=projects/*/locations"
+          + "/*/catalogs/*}/userEvents:rejoin:\001*\312A4\n\030"
+          + "RejoinUserEventsResponse\022\030RejoinUserEven"
+          + "tsMetadata\032I\312A\025retail.googleapis.com\322A.h"
+          + "ttps://www.googleapis.com/auth/cloud-pla"
+          + "tformB\312\001\n\032com.google.cloud.retail.v2B\025Us"
+          + "erEventServiceProtoP\001Z<google.golang.org"
+          + "/genproto/googleapis/cloud/retail/v2;ret"
+          + "ail\242\002\006RETAIL\252\002\026Google.Cloud.Retail.V2\312\002\026"
+          + "Google\\Cloud\\Retail\\V2\352\002\031Google::Cloud::"
+          + "Retail::V2b\006proto3"
+    };
+    descriptor =
+        com.google.protobuf.Descriptors.FileDescriptor.internalBuildGeneratedFileFrom(
+            descriptorData,
+            new com.google.protobuf.Descriptors.FileDescriptor[] {
+              com.google.api.AnnotationsProto.getDescriptor(),
+              com.google.api.ClientProto.getDescriptor(),
+              com.google.api.FieldBehaviorProto.getDescriptor(),
+              com.google.api.HttpBodyProto.getDescriptor(),
+              com.google.cloud.retail.v2.ImportConfigProto.getDescriptor(),
+              com.google.cloud.retail.v2.PurgeConfigProto.getDescriptor(),
+              com.google.cloud.retail.v2.UserEventProto.getDescriptor(),
+              com.google.longrunning.OperationsProto.getDescriptor(),
+            });
+    internal_static_google_cloud_retail_v2_WriteUserEventRequest_descriptor =
+        getDescriptor().getMessageTypes().get(0);
+    internal_static_google_cloud_retail_v2_WriteUserEventRequest_fieldAccessorTable =
+        new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+            internal_static_google_cloud_retail_v2_WriteUserEventRequest_descriptor,
+            new java.lang.String[] {
+              "Parent", "UserEvent",
+            });
+    internal_static_google_cloud_retail_v2_CollectUserEventRequest_descriptor =
+        getDescriptor().getMessageTypes().get(1);
+    internal_static_google_cloud_retail_v2_CollectUserEventRequest_fieldAccessorTable =
+        new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+            internal_static_google_cloud_retail_v2_CollectUserEventRequest_descriptor,
+            new java.lang.String[] {
+              "Parent", "UserEvent", "Uri", "Ets",
+            });
+    internal_static_google_cloud_retail_v2_RejoinUserEventsRequest_descriptor =
+        getDescriptor().getMessageTypes().get(2);
+    internal_static_google_cloud_retail_v2_RejoinUserEventsRequest_fieldAccessorTable =
+        new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+            internal_static_google_cloud_retail_v2_RejoinUserEventsRequest_descriptor,
+            new java.lang.String[] {
+              "Parent", "UserEventRejoinScope",
+            });
+    internal_static_google_cloud_retail_v2_RejoinUserEventsResponse_descriptor =
+        getDescriptor().getMessageTypes().get(3);
+    internal_static_google_cloud_retail_v2_RejoinUserEventsResponse_fieldAccessorTable =
+        new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+            internal_static_google_cloud_retail_v2_RejoinUserEventsResponse_descriptor,
+            new java.lang.String[] {
+              "RejoinedUserEventsCount",
+            });
+    internal_static_google_cloud_retail_v2_RejoinUserEventsMetadata_descriptor =
+        getDescriptor().getMessageTypes().get(4);
+    internal_static_google_cloud_retail_v2_RejoinUserEventsMetadata_fieldAccessorTable =
+        new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+            internal_static_google_cloud_retail_v2_RejoinUserEventsMetadata_descriptor,
+            new java.lang.String[] {});
+    com.google.protobuf.ExtensionRegistry registry =
+        com.google.protobuf.ExtensionRegistry.newInstance();
+    registry.add(com.google.api.ClientProto.defaultHost);
+    registry.add(com.google.api.FieldBehaviorProto.fieldBehavior);
+    registry.add(com.google.api.AnnotationsProto.http);
+    registry.add(com.google.api.ClientProto.oauthScopes);
+    registry.add(com.google.longrunning.OperationsProto.operationInfo);
+    com.google.protobuf.Descriptors.FileDescriptor.internalUpdateFileDescriptor(
+        descriptor, registry);
+    com.google.api.AnnotationsProto.getDescriptor();
+    com.google.api.ClientProto.getDescriptor();
+    com.google.api.FieldBehaviorProto.getDescriptor();
+    com.google.api.HttpBodyProto.getDescriptor();
+    com.google.cloud.retail.v2.ImportConfigProto.getDescriptor();
+    com.google.cloud.retail.v2.PurgeConfigProto.getDescriptor();
+    com.google.cloud.retail.v2.UserEventProto.getDescriptor();
+    com.google.longrunning.OperationsProto.getDescriptor();
+  }
+
+  // @@protoc_insertion_point(outer_class_scope)
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/UserInfo.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/UserInfo.java
new file mode 100644
index 00000000..7aab645d
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/UserInfo.java
@@ -0,0 +1,1247 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/common.proto
+
+package com.google.cloud.retail.v2;
+
+/**
+ *
+ *
+ * <pre>
+ * Information of an end user.
+ * </pre>
+ *
+ * Protobuf type {@code google.cloud.retail.v2.UserInfo}
+ */
+public final class UserInfo extends com.google.protobuf.GeneratedMessageV3
+    implements
+    // @@protoc_insertion_point(message_implements:google.cloud.retail.v2.UserInfo)
+    UserInfoOrBuilder {
+  private static final long serialVersionUID = 0L;
+  // Use UserInfo.newBuilder() to construct.
+  private UserInfo(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+    super(builder);
+  }
+
+  private UserInfo() {
+    userId_ = "";
+    ipAddress_ = "";
+    userAgent_ = "";
+  }
+
+  @java.lang.Override
+  @SuppressWarnings({"unused"})
+  protected java.lang.Object newInstance(UnusedPrivateParameter unused) {
+    return new UserInfo();
+  }
+
+  @java.lang.Override
+  public final com.google.protobuf.UnknownFieldSet getUnknownFields() {
+    return this.unknownFields;
+  }
+
+  private UserInfo(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    this();
+    if (extensionRegistry == null) {
+      throw new java.lang.NullPointerException();
+    }
+    com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+        com.google.protobuf.UnknownFieldSet.newBuilder();
+    try {
+      boolean done = false;
+      while (!done) {
+        int tag = input.readTag();
+        switch (tag) {
+          case 0:
+            done = true;
+            break;
+          case 10:
+            {
+              java.lang.String s = input.readStringRequireUtf8();
+
+              userId_ = s;
+              break;
+            }
+          case 18:
+            {
+              java.lang.String s = input.readStringRequireUtf8();
+
+              ipAddress_ = s;
+              break;
+            }
+          case 26:
+            {
+              java.lang.String s = input.readStringRequireUtf8();
+
+              userAgent_ = s;
+              break;
+            }
+          case 32:
+            {
+              directUserRequest_ = input.readBool();
+              break;
+            }
+          default:
+            {
+              if (!parseUnknownField(input, unknownFields, extensionRegistry, tag)) {
+                done = true;
+              }
+              break;
+            }
+        }
+      }
+    } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+      throw e.setUnfinishedMessage(this);
+    } catch (java.io.IOException e) {
+      throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
+    } finally {
+      this.unknownFields = unknownFields.build();
+      makeExtensionsImmutable();
+    }
+  }
+
+  public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+    return com.google.cloud.retail.v2.CommonProto
+        .internal_static_google_cloud_retail_v2_UserInfo_descriptor;
+  }
+
+  @java.lang.Override
+  protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internalGetFieldAccessorTable() {
+    return com.google.cloud.retail.v2.CommonProto
+        .internal_static_google_cloud_retail_v2_UserInfo_fieldAccessorTable
+        .ensureFieldAccessorsInitialized(
+            com.google.cloud.retail.v2.UserInfo.class,
+            com.google.cloud.retail.v2.UserInfo.Builder.class);
+  }
+
+  public static final int USER_ID_FIELD_NUMBER = 1;
+  private volatile java.lang.Object userId_;
+  /**
+   *
+   *
+   * <pre>
+   * Highly recommended for logged-in users. Unique identifier for logged-in
+   * user, such as a user name.
+   * The field must be a UTF-8 encoded string with a length limit of 128
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * </pre>
+   *
+   * <code>string user_id = 1;</code>
+   *
+   * @return The userId.
+   */
+  @java.lang.Override
+  public java.lang.String getUserId() {
+    java.lang.Object ref = userId_;
+    if (ref instanceof java.lang.String) {
+      return (java.lang.String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+      java.lang.String s = bs.toStringUtf8();
+      userId_ = s;
+      return s;
+    }
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Highly recommended for logged-in users. Unique identifier for logged-in
+   * user, such as a user name.
+   * The field must be a UTF-8 encoded string with a length limit of 128
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * </pre>
+   *
+   * <code>string user_id = 1;</code>
+   *
+   * @return The bytes for userId.
+   */
+  @java.lang.Override
+  public com.google.protobuf.ByteString getUserIdBytes() {
+    java.lang.Object ref = userId_;
+    if (ref instanceof java.lang.String) {
+      com.google.protobuf.ByteString b =
+          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+      userId_ = b;
+      return b;
+    } else {
+      return (com.google.protobuf.ByteString) ref;
+    }
+  }
+
+  public static final int IP_ADDRESS_FIELD_NUMBER = 2;
+  private volatile java.lang.Object ipAddress_;
+  /**
+   *
+   *
+   * <pre>
+   * The end user's IP address. This field is used to extract location
+   * information for personalization.
+   * This field must be either an IPv4 address (e.g. "104.133.9.80") or an IPv6
+   * address (e.g. "2001:0db8:85a3:0000:0000:8a2e:0370:7334"). Otherwise, an
+   * INVALID_ARGUMENT error is returned.
+   * This should not be set when using the JavaScript tag in
+   * [UserEventService.CollectUserEvent][google.cloud.retail.v2.UserEventService.CollectUserEvent]
+   * or if
+   * [direct_user_request][google.cloud.retail.v2.UserInfo.direct_user_request]
+   * is set.
+   * </pre>
+   *
+   * <code>string ip_address = 2;</code>
+   *
+   * @return The ipAddress.
+   */
+  @java.lang.Override
+  public java.lang.String getIpAddress() {
+    java.lang.Object ref = ipAddress_;
+    if (ref instanceof java.lang.String) {
+      return (java.lang.String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+      java.lang.String s = bs.toStringUtf8();
+      ipAddress_ = s;
+      return s;
+    }
+  }
+  /**
+   *
+   *
+   * <pre>
+   * The end user's IP address. This field is used to extract location
+   * information for personalization.
+   * This field must be either an IPv4 address (e.g. "104.133.9.80") or an IPv6
+   * address (e.g. "2001:0db8:85a3:0000:0000:8a2e:0370:7334"). Otherwise, an
+   * INVALID_ARGUMENT error is returned.
+   * This should not be set when using the JavaScript tag in
+   * [UserEventService.CollectUserEvent][google.cloud.retail.v2.UserEventService.CollectUserEvent]
+   * or if
+   * [direct_user_request][google.cloud.retail.v2.UserInfo.direct_user_request]
+   * is set.
+   * </pre>
+   *
+   * <code>string ip_address = 2;</code>
+   *
+   * @return The bytes for ipAddress.
+   */
+  @java.lang.Override
+  public com.google.protobuf.ByteString getIpAddressBytes() {
+    java.lang.Object ref = ipAddress_;
+    if (ref instanceof java.lang.String) {
+      com.google.protobuf.ByteString b =
+          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+      ipAddress_ = b;
+      return b;
+    } else {
+      return (com.google.protobuf.ByteString) ref;
+    }
+  }
+
+  public static final int USER_AGENT_FIELD_NUMBER = 3;
+  private volatile java.lang.Object userAgent_;
+  /**
+   *
+   *
+   * <pre>
+   * User agent as included in the HTTP header.
+   * The field must be a UTF-8 encoded string with a length limit of 1,000
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * This should not be set when using the client side event reporting with
+   * GTM or JavaScript tag in
+   * [UserEventService.CollectUserEvent][google.cloud.retail.v2.UserEventService.CollectUserEvent]
+   * or if
+   * [direct_user_request][google.cloud.retail.v2.UserInfo.direct_user_request]
+   * is set.
+   * </pre>
+   *
+   * <code>string user_agent = 3;</code>
+   *
+   * @return The userAgent.
+   */
+  @java.lang.Override
+  public java.lang.String getUserAgent() {
+    java.lang.Object ref = userAgent_;
+    if (ref instanceof java.lang.String) {
+      return (java.lang.String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+      java.lang.String s = bs.toStringUtf8();
+      userAgent_ = s;
+      return s;
+    }
+  }
+  /**
+   *
+   *
+   * <pre>
+   * User agent as included in the HTTP header.
+   * The field must be a UTF-8 encoded string with a length limit of 1,000
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * This should not be set when using the client side event reporting with
+   * GTM or JavaScript tag in
+   * [UserEventService.CollectUserEvent][google.cloud.retail.v2.UserEventService.CollectUserEvent]
+   * or if
+   * [direct_user_request][google.cloud.retail.v2.UserInfo.direct_user_request]
+   * is set.
+   * </pre>
+   *
+   * <code>string user_agent = 3;</code>
+   *
+   * @return The bytes for userAgent.
+   */
+  @java.lang.Override
+  public com.google.protobuf.ByteString getUserAgentBytes() {
+    java.lang.Object ref = userAgent_;
+    if (ref instanceof java.lang.String) {
+      com.google.protobuf.ByteString b =
+          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+      userAgent_ = b;
+      return b;
+    } else {
+      return (com.google.protobuf.ByteString) ref;
+    }
+  }
+
+  public static final int DIRECT_USER_REQUEST_FIELD_NUMBER = 4;
+  private boolean directUserRequest_;
+  /**
+   *
+   *
+   * <pre>
+   * True if the request is made directly from the end user, in which case the
+   * [ip_address][google.cloud.retail.v2.UserInfo.ip_address] and
+   * [user_agent][google.cloud.retail.v2.UserInfo.user_agent] can be populated
+   * from the HTTP request. This flag should be set only if the API request is
+   * made directly from the end user such as a mobile app (and not if a gateway
+   * or a server is processing and pushing the user events).
+   * This should not be set when using the JavaScript tag in
+   * [UserEventService.CollectUserEvent][google.cloud.retail.v2.UserEventService.CollectUserEvent].
+   * </pre>
+   *
+   * <code>bool direct_user_request = 4;</code>
+   *
+   * @return The directUserRequest.
+   */
+  @java.lang.Override
+  public boolean getDirectUserRequest() {
+    return directUserRequest_;
+  }
+
+  private byte memoizedIsInitialized = -1;
+
+  @java.lang.Override
+  public final boolean isInitialized() {
+    byte isInitialized = memoizedIsInitialized;
+    if (isInitialized == 1) return true;
+    if (isInitialized == 0) return false;
+
+    memoizedIsInitialized = 1;
+    return true;
+  }
+
+  @java.lang.Override
+  public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
+    if (!getUserIdBytes().isEmpty()) {
+      com.google.protobuf.GeneratedMessageV3.writeString(output, 1, userId_);
+    }
+    if (!getIpAddressBytes().isEmpty()) {
+      com.google.protobuf.GeneratedMessageV3.writeString(output, 2, ipAddress_);
+    }
+    if (!getUserAgentBytes().isEmpty()) {
+      com.google.protobuf.GeneratedMessageV3.writeString(output, 3, userAgent_);
+    }
+    if (directUserRequest_ != false) {
+      output.writeBool(4, directUserRequest_);
+    }
+    unknownFields.writeTo(output);
+  }
+
+  @java.lang.Override
+  public int getSerializedSize() {
+    int size = memoizedSize;
+    if (size != -1) return size;
+
+    size = 0;
+    if (!getUserIdBytes().isEmpty()) {
+      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(1, userId_);
+    }
+    if (!getIpAddressBytes().isEmpty()) {
+      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(2, ipAddress_);
+    }
+    if (!getUserAgentBytes().isEmpty()) {
+      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(3, userAgent_);
+    }
+    if (directUserRequest_ != false) {
+      size += com.google.protobuf.CodedOutputStream.computeBoolSize(4, directUserRequest_);
+    }
+    size += unknownFields.getSerializedSize();
+    memoizedSize = size;
+    return size;
+  }
+
+  @java.lang.Override
+  public boolean equals(final java.lang.Object obj) {
+    if (obj == this) {
+      return true;
+    }
+    if (!(obj instanceof com.google.cloud.retail.v2.UserInfo)) {
+      return super.equals(obj);
+    }
+    com.google.cloud.retail.v2.UserInfo other = (com.google.cloud.retail.v2.UserInfo) obj;
+
+    if (!getUserId().equals(other.getUserId())) return false;
+    if (!getIpAddress().equals(other.getIpAddress())) return false;
+    if (!getUserAgent().equals(other.getUserAgent())) return false;
+    if (getDirectUserRequest() != other.getDirectUserRequest()) return false;
+    if (!unknownFields.equals(other.unknownFields)) return false;
+    return true;
+  }
+
+  @java.lang.Override
+  public int hashCode() {
+    if (memoizedHashCode != 0) {
+      return memoizedHashCode;
+    }
+    int hash = 41;
+    hash = (19 * hash) + getDescriptor().hashCode();
+    hash = (37 * hash) + USER_ID_FIELD_NUMBER;
+    hash = (53 * hash) + getUserId().hashCode();
+    hash = (37 * hash) + IP_ADDRESS_FIELD_NUMBER;
+    hash = (53 * hash) + getIpAddress().hashCode();
+    hash = (37 * hash) + USER_AGENT_FIELD_NUMBER;
+    hash = (53 * hash) + getUserAgent().hashCode();
+    hash = (37 * hash) + DIRECT_USER_REQUEST_FIELD_NUMBER;
+    hash = (53 * hash) + com.google.protobuf.Internal.hashBoolean(getDirectUserRequest());
+    hash = (29 * hash) + unknownFields.hashCode();
+    memoizedHashCode = hash;
+    return hash;
+  }
+
+  public static com.google.cloud.retail.v2.UserInfo parseFrom(java.nio.ByteBuffer data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.UserInfo parseFrom(
+      java.nio.ByteBuffer data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.UserInfo parseFrom(com.google.protobuf.ByteString data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.UserInfo parseFrom(
+      com.google.protobuf.ByteString data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.UserInfo parseFrom(byte[] data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.UserInfo parseFrom(
+      byte[] data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.UserInfo parseFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.UserInfo parseFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.UserInfo parseDelimitedFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.UserInfo parseDelimitedFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.UserInfo parseFrom(
+      com.google.protobuf.CodedInputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.UserInfo parseFrom(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  @java.lang.Override
+  public Builder newBuilderForType() {
+    return newBuilder();
+  }
+
+  public static Builder newBuilder() {
+    return DEFAULT_INSTANCE.toBuilder();
+  }
+
+  public static Builder newBuilder(com.google.cloud.retail.v2.UserInfo prototype) {
+    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+  }
+
+  @java.lang.Override
+  public Builder toBuilder() {
+    return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
+  }
+
+  @java.lang.Override
+  protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+    Builder builder = new Builder(parent);
+    return builder;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Information of an end user.
+   * </pre>
+   *
+   * Protobuf type {@code google.cloud.retail.v2.UserInfo}
+   */
+  public static final class Builder extends com.google.protobuf.GeneratedMessageV3.Builder<Builder>
+      implements
+      // @@protoc_insertion_point(builder_implements:google.cloud.retail.v2.UserInfo)
+      com.google.cloud.retail.v2.UserInfoOrBuilder {
+    public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+      return com.google.cloud.retail.v2.CommonProto
+          .internal_static_google_cloud_retail_v2_UserInfo_descriptor;
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return com.google.cloud.retail.v2.CommonProto
+          .internal_static_google_cloud_retail_v2_UserInfo_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              com.google.cloud.retail.v2.UserInfo.class,
+              com.google.cloud.retail.v2.UserInfo.Builder.class);
+    }
+
+    // Construct using com.google.cloud.retail.v2.UserInfo.newBuilder()
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
+
+    private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+      super(parent);
+      maybeForceBuilderInitialization();
+    }
+
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders) {}
+    }
+
+    @java.lang.Override
+    public Builder clear() {
+      super.clear();
+      userId_ = "";
+
+      ipAddress_ = "";
+
+      userAgent_ = "";
+
+      directUserRequest_ = false;
+
+      return this;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
+      return com.google.cloud.retail.v2.CommonProto
+          .internal_static_google_cloud_retail_v2_UserInfo_descriptor;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.UserInfo getDefaultInstanceForType() {
+      return com.google.cloud.retail.v2.UserInfo.getDefaultInstance();
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.UserInfo build() {
+      com.google.cloud.retail.v2.UserInfo result = buildPartial();
+      if (!result.isInitialized()) {
+        throw newUninitializedMessageException(result);
+      }
+      return result;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.UserInfo buildPartial() {
+      com.google.cloud.retail.v2.UserInfo result = new com.google.cloud.retail.v2.UserInfo(this);
+      result.userId_ = userId_;
+      result.ipAddress_ = ipAddress_;
+      result.userAgent_ = userAgent_;
+      result.directUserRequest_ = directUserRequest_;
+      onBuilt();
+      return result;
+    }
+
+    @java.lang.Override
+    public Builder clone() {
+      return super.clone();
+    }
+
+    @java.lang.Override
+    public Builder setField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.setField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
+      return super.clearField(field);
+    }
+
+    @java.lang.Override
+    public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+      return super.clearOneof(oneof);
+    }
+
+    @java.lang.Override
+    public Builder setRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, int index, java.lang.Object value) {
+      return super.setRepeatedField(field, index, value);
+    }
+
+    @java.lang.Override
+    public Builder addRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.addRepeatedField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(com.google.protobuf.Message other) {
+      if (other instanceof com.google.cloud.retail.v2.UserInfo) {
+        return mergeFrom((com.google.cloud.retail.v2.UserInfo) other);
+      } else {
+        super.mergeFrom(other);
+        return this;
+      }
+    }
+
+    public Builder mergeFrom(com.google.cloud.retail.v2.UserInfo other) {
+      if (other == com.google.cloud.retail.v2.UserInfo.getDefaultInstance()) return this;
+      if (!other.getUserId().isEmpty()) {
+        userId_ = other.userId_;
+        onChanged();
+      }
+      if (!other.getIpAddress().isEmpty()) {
+        ipAddress_ = other.ipAddress_;
+        onChanged();
+      }
+      if (!other.getUserAgent().isEmpty()) {
+        userAgent_ = other.userAgent_;
+        onChanged();
+      }
+      if (other.getDirectUserRequest() != false) {
+        setDirectUserRequest(other.getDirectUserRequest());
+      }
+      this.mergeUnknownFields(other.unknownFields);
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final boolean isInitialized() {
+      return true;
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      com.google.cloud.retail.v2.UserInfo parsedMessage = null;
+      try {
+        parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        parsedMessage = (com.google.cloud.retail.v2.UserInfo) e.getUnfinishedMessage();
+        throw e.unwrapIOException();
+      } finally {
+        if (parsedMessage != null) {
+          mergeFrom(parsedMessage);
+        }
+      }
+      return this;
+    }
+
+    private java.lang.Object userId_ = "";
+    /**
+     *
+     *
+     * <pre>
+     * Highly recommended for logged-in users. Unique identifier for logged-in
+     * user, such as a user name.
+     * The field must be a UTF-8 encoded string with a length limit of 128
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>string user_id = 1;</code>
+     *
+     * @return The userId.
+     */
+    public java.lang.String getUserId() {
+      java.lang.Object ref = userId_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        userId_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Highly recommended for logged-in users. Unique identifier for logged-in
+     * user, such as a user name.
+     * The field must be a UTF-8 encoded string with a length limit of 128
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>string user_id = 1;</code>
+     *
+     * @return The bytes for userId.
+     */
+    public com.google.protobuf.ByteString getUserIdBytes() {
+      java.lang.Object ref = userId_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b =
+            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+        userId_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Highly recommended for logged-in users. Unique identifier for logged-in
+     * user, such as a user name.
+     * The field must be a UTF-8 encoded string with a length limit of 128
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>string user_id = 1;</code>
+     *
+     * @param value The userId to set.
+     * @return This builder for chaining.
+     */
+    public Builder setUserId(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+
+      userId_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Highly recommended for logged-in users. Unique identifier for logged-in
+     * user, such as a user name.
+     * The field must be a UTF-8 encoded string with a length limit of 128
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>string user_id = 1;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearUserId() {
+
+      userId_ = getDefaultInstance().getUserId();
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Highly recommended for logged-in users. Unique identifier for logged-in
+     * user, such as a user name.
+     * The field must be a UTF-8 encoded string with a length limit of 128
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * </pre>
+     *
+     * <code>string user_id = 1;</code>
+     *
+     * @param value The bytes for userId to set.
+     * @return This builder for chaining.
+     */
+    public Builder setUserIdBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+
+      userId_ = value;
+      onChanged();
+      return this;
+    }
+
+    private java.lang.Object ipAddress_ = "";
+    /**
+     *
+     *
+     * <pre>
+     * The end user's IP address. This field is used to extract location
+     * information for personalization.
+     * This field must be either an IPv4 address (e.g. "104.133.9.80") or an IPv6
+     * address (e.g. "2001:0db8:85a3:0000:0000:8a2e:0370:7334"). Otherwise, an
+     * INVALID_ARGUMENT error is returned.
+     * This should not be set when using the JavaScript tag in
+     * [UserEventService.CollectUserEvent][google.cloud.retail.v2.UserEventService.CollectUserEvent]
+     * or if
+     * [direct_user_request][google.cloud.retail.v2.UserInfo.direct_user_request]
+     * is set.
+     * </pre>
+     *
+     * <code>string ip_address = 2;</code>
+     *
+     * @return The ipAddress.
+     */
+    public java.lang.String getIpAddress() {
+      java.lang.Object ref = ipAddress_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        ipAddress_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The end user's IP address. This field is used to extract location
+     * information for personalization.
+     * This field must be either an IPv4 address (e.g. "104.133.9.80") or an IPv6
+     * address (e.g. "2001:0db8:85a3:0000:0000:8a2e:0370:7334"). Otherwise, an
+     * INVALID_ARGUMENT error is returned.
+     * This should not be set when using the JavaScript tag in
+     * [UserEventService.CollectUserEvent][google.cloud.retail.v2.UserEventService.CollectUserEvent]
+     * or if
+     * [direct_user_request][google.cloud.retail.v2.UserInfo.direct_user_request]
+     * is set.
+     * </pre>
+     *
+     * <code>string ip_address = 2;</code>
+     *
+     * @return The bytes for ipAddress.
+     */
+    public com.google.protobuf.ByteString getIpAddressBytes() {
+      java.lang.Object ref = ipAddress_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b =
+            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+        ipAddress_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The end user's IP address. This field is used to extract location
+     * information for personalization.
+     * This field must be either an IPv4 address (e.g. "104.133.9.80") or an IPv6
+     * address (e.g. "2001:0db8:85a3:0000:0000:8a2e:0370:7334"). Otherwise, an
+     * INVALID_ARGUMENT error is returned.
+     * This should not be set when using the JavaScript tag in
+     * [UserEventService.CollectUserEvent][google.cloud.retail.v2.UserEventService.CollectUserEvent]
+     * or if
+     * [direct_user_request][google.cloud.retail.v2.UserInfo.direct_user_request]
+     * is set.
+     * </pre>
+     *
+     * <code>string ip_address = 2;</code>
+     *
+     * @param value The ipAddress to set.
+     * @return This builder for chaining.
+     */
+    public Builder setIpAddress(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+
+      ipAddress_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The end user's IP address. This field is used to extract location
+     * information for personalization.
+     * This field must be either an IPv4 address (e.g. "104.133.9.80") or an IPv6
+     * address (e.g. "2001:0db8:85a3:0000:0000:8a2e:0370:7334"). Otherwise, an
+     * INVALID_ARGUMENT error is returned.
+     * This should not be set when using the JavaScript tag in
+     * [UserEventService.CollectUserEvent][google.cloud.retail.v2.UserEventService.CollectUserEvent]
+     * or if
+     * [direct_user_request][google.cloud.retail.v2.UserInfo.direct_user_request]
+     * is set.
+     * </pre>
+     *
+     * <code>string ip_address = 2;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearIpAddress() {
+
+      ipAddress_ = getDefaultInstance().getIpAddress();
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * The end user's IP address. This field is used to extract location
+     * information for personalization.
+     * This field must be either an IPv4 address (e.g. "104.133.9.80") or an IPv6
+     * address (e.g. "2001:0db8:85a3:0000:0000:8a2e:0370:7334"). Otherwise, an
+     * INVALID_ARGUMENT error is returned.
+     * This should not be set when using the JavaScript tag in
+     * [UserEventService.CollectUserEvent][google.cloud.retail.v2.UserEventService.CollectUserEvent]
+     * or if
+     * [direct_user_request][google.cloud.retail.v2.UserInfo.direct_user_request]
+     * is set.
+     * </pre>
+     *
+     * <code>string ip_address = 2;</code>
+     *
+     * @param value The bytes for ipAddress to set.
+     * @return This builder for chaining.
+     */
+    public Builder setIpAddressBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+
+      ipAddress_ = value;
+      onChanged();
+      return this;
+    }
+
+    private java.lang.Object userAgent_ = "";
+    /**
+     *
+     *
+     * <pre>
+     * User agent as included in the HTTP header.
+     * The field must be a UTF-8 encoded string with a length limit of 1,000
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * This should not be set when using the client side event reporting with
+     * GTM or JavaScript tag in
+     * [UserEventService.CollectUserEvent][google.cloud.retail.v2.UserEventService.CollectUserEvent]
+     * or if
+     * [direct_user_request][google.cloud.retail.v2.UserInfo.direct_user_request]
+     * is set.
+     * </pre>
+     *
+     * <code>string user_agent = 3;</code>
+     *
+     * @return The userAgent.
+     */
+    public java.lang.String getUserAgent() {
+      java.lang.Object ref = userAgent_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        userAgent_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * User agent as included in the HTTP header.
+     * The field must be a UTF-8 encoded string with a length limit of 1,000
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * This should not be set when using the client side event reporting with
+     * GTM or JavaScript tag in
+     * [UserEventService.CollectUserEvent][google.cloud.retail.v2.UserEventService.CollectUserEvent]
+     * or if
+     * [direct_user_request][google.cloud.retail.v2.UserInfo.direct_user_request]
+     * is set.
+     * </pre>
+     *
+     * <code>string user_agent = 3;</code>
+     *
+     * @return The bytes for userAgent.
+     */
+    public com.google.protobuf.ByteString getUserAgentBytes() {
+      java.lang.Object ref = userAgent_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b =
+            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+        userAgent_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * User agent as included in the HTTP header.
+     * The field must be a UTF-8 encoded string with a length limit of 1,000
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * This should not be set when using the client side event reporting with
+     * GTM or JavaScript tag in
+     * [UserEventService.CollectUserEvent][google.cloud.retail.v2.UserEventService.CollectUserEvent]
+     * or if
+     * [direct_user_request][google.cloud.retail.v2.UserInfo.direct_user_request]
+     * is set.
+     * </pre>
+     *
+     * <code>string user_agent = 3;</code>
+     *
+     * @param value The userAgent to set.
+     * @return This builder for chaining.
+     */
+    public Builder setUserAgent(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+
+      userAgent_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * User agent as included in the HTTP header.
+     * The field must be a UTF-8 encoded string with a length limit of 1,000
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * This should not be set when using the client side event reporting with
+     * GTM or JavaScript tag in
+     * [UserEventService.CollectUserEvent][google.cloud.retail.v2.UserEventService.CollectUserEvent]
+     * or if
+     * [direct_user_request][google.cloud.retail.v2.UserInfo.direct_user_request]
+     * is set.
+     * </pre>
+     *
+     * <code>string user_agent = 3;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearUserAgent() {
+
+      userAgent_ = getDefaultInstance().getUserAgent();
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * User agent as included in the HTTP header.
+     * The field must be a UTF-8 encoded string with a length limit of 1,000
+     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+     * This should not be set when using the client side event reporting with
+     * GTM or JavaScript tag in
+     * [UserEventService.CollectUserEvent][google.cloud.retail.v2.UserEventService.CollectUserEvent]
+     * or if
+     * [direct_user_request][google.cloud.retail.v2.UserInfo.direct_user_request]
+     * is set.
+     * </pre>
+     *
+     * <code>string user_agent = 3;</code>
+     *
+     * @param value The bytes for userAgent to set.
+     * @return This builder for chaining.
+     */
+    public Builder setUserAgentBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+
+      userAgent_ = value;
+      onChanged();
+      return this;
+    }
+
+    private boolean directUserRequest_;
+    /**
+     *
+     *
+     * <pre>
+     * True if the request is made directly from the end user, in which case the
+     * [ip_address][google.cloud.retail.v2.UserInfo.ip_address] and
+     * [user_agent][google.cloud.retail.v2.UserInfo.user_agent] can be populated
+     * from the HTTP request. This flag should be set only if the API request is
+     * made directly from the end user such as a mobile app (and not if a gateway
+     * or a server is processing and pushing the user events).
+     * This should not be set when using the JavaScript tag in
+     * [UserEventService.CollectUserEvent][google.cloud.retail.v2.UserEventService.CollectUserEvent].
+     * </pre>
+     *
+     * <code>bool direct_user_request = 4;</code>
+     *
+     * @return The directUserRequest.
+     */
+    @java.lang.Override
+    public boolean getDirectUserRequest() {
+      return directUserRequest_;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * True if the request is made directly from the end user, in which case the
+     * [ip_address][google.cloud.retail.v2.UserInfo.ip_address] and
+     * [user_agent][google.cloud.retail.v2.UserInfo.user_agent] can be populated
+     * from the HTTP request. This flag should be set only if the API request is
+     * made directly from the end user such as a mobile app (and not if a gateway
+     * or a server is processing and pushing the user events).
+     * This should not be set when using the JavaScript tag in
+     * [UserEventService.CollectUserEvent][google.cloud.retail.v2.UserEventService.CollectUserEvent].
+     * </pre>
+     *
+     * <code>bool direct_user_request = 4;</code>
+     *
+     * @param value The directUserRequest to set.
+     * @return This builder for chaining.
+     */
+    public Builder setDirectUserRequest(boolean value) {
+
+      directUserRequest_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * True if the request is made directly from the end user, in which case the
+     * [ip_address][google.cloud.retail.v2.UserInfo.ip_address] and
+     * [user_agent][google.cloud.retail.v2.UserInfo.user_agent] can be populated
+     * from the HTTP request. This flag should be set only if the API request is
+     * made directly from the end user such as a mobile app (and not if a gateway
+     * or a server is processing and pushing the user events).
+     * This should not be set when using the JavaScript tag in
+     * [UserEventService.CollectUserEvent][google.cloud.retail.v2.UserEventService.CollectUserEvent].
+     * </pre>
+     *
+     * <code>bool direct_user_request = 4;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearDirectUserRequest() {
+
+      directUserRequest_ = false;
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.setUnknownFields(unknownFields);
+    }
+
+    @java.lang.Override
+    public final Builder mergeUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.mergeUnknownFields(unknownFields);
+    }
+
+    // @@protoc_insertion_point(builder_scope:google.cloud.retail.v2.UserInfo)
+  }
+
+  // @@protoc_insertion_point(class_scope:google.cloud.retail.v2.UserInfo)
+  private static final com.google.cloud.retail.v2.UserInfo DEFAULT_INSTANCE;
+
+  static {
+    DEFAULT_INSTANCE = new com.google.cloud.retail.v2.UserInfo();
+  }
+
+  public static com.google.cloud.retail.v2.UserInfo getDefaultInstance() {
+    return DEFAULT_INSTANCE;
+  }
+
+  private static final com.google.protobuf.Parser<UserInfo> PARSER =
+      new com.google.protobuf.AbstractParser<UserInfo>() {
+        @java.lang.Override
+        public UserInfo parsePartialFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws com.google.protobuf.InvalidProtocolBufferException {
+          return new UserInfo(input, extensionRegistry);
+        }
+      };
+
+  public static com.google.protobuf.Parser<UserInfo> parser() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.protobuf.Parser<UserInfo> getParserForType() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.cloud.retail.v2.UserInfo getDefaultInstanceForType() {
+    return DEFAULT_INSTANCE;
+  }
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/UserInfoOrBuilder.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/UserInfoOrBuilder.java
new file mode 100644
index 00000000..7d78a82f
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/UserInfoOrBuilder.java
@@ -0,0 +1,160 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/common.proto
+
+package com.google.cloud.retail.v2;
+
+public interface UserInfoOrBuilder
+    extends
+    // @@protoc_insertion_point(interface_extends:google.cloud.retail.v2.UserInfo)
+    com.google.protobuf.MessageOrBuilder {
+
+  /**
+   *
+   *
+   * <pre>
+   * Highly recommended for logged-in users. Unique identifier for logged-in
+   * user, such as a user name.
+   * The field must be a UTF-8 encoded string with a length limit of 128
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * </pre>
+   *
+   * <code>string user_id = 1;</code>
+   *
+   * @return The userId.
+   */
+  java.lang.String getUserId();
+  /**
+   *
+   *
+   * <pre>
+   * Highly recommended for logged-in users. Unique identifier for logged-in
+   * user, such as a user name.
+   * The field must be a UTF-8 encoded string with a length limit of 128
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * </pre>
+   *
+   * <code>string user_id = 1;</code>
+   *
+   * @return The bytes for userId.
+   */
+  com.google.protobuf.ByteString getUserIdBytes();
+
+  /**
+   *
+   *
+   * <pre>
+   * The end user's IP address. This field is used to extract location
+   * information for personalization.
+   * This field must be either an IPv4 address (e.g. "104.133.9.80") or an IPv6
+   * address (e.g. "2001:0db8:85a3:0000:0000:8a2e:0370:7334"). Otherwise, an
+   * INVALID_ARGUMENT error is returned.
+   * This should not be set when using the JavaScript tag in
+   * [UserEventService.CollectUserEvent][google.cloud.retail.v2.UserEventService.CollectUserEvent]
+   * or if
+   * [direct_user_request][google.cloud.retail.v2.UserInfo.direct_user_request]
+   * is set.
+   * </pre>
+   *
+   * <code>string ip_address = 2;</code>
+   *
+   * @return The ipAddress.
+   */
+  java.lang.String getIpAddress();
+  /**
+   *
+   *
+   * <pre>
+   * The end user's IP address. This field is used to extract location
+   * information for personalization.
+   * This field must be either an IPv4 address (e.g. "104.133.9.80") or an IPv6
+   * address (e.g. "2001:0db8:85a3:0000:0000:8a2e:0370:7334"). Otherwise, an
+   * INVALID_ARGUMENT error is returned.
+   * This should not be set when using the JavaScript tag in
+   * [UserEventService.CollectUserEvent][google.cloud.retail.v2.UserEventService.CollectUserEvent]
+   * or if
+   * [direct_user_request][google.cloud.retail.v2.UserInfo.direct_user_request]
+   * is set.
+   * </pre>
+   *
+   * <code>string ip_address = 2;</code>
+   *
+   * @return The bytes for ipAddress.
+   */
+  com.google.protobuf.ByteString getIpAddressBytes();
+
+  /**
+   *
+   *
+   * <pre>
+   * User agent as included in the HTTP header.
+   * The field must be a UTF-8 encoded string with a length limit of 1,000
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * This should not be set when using the client side event reporting with
+   * GTM or JavaScript tag in
+   * [UserEventService.CollectUserEvent][google.cloud.retail.v2.UserEventService.CollectUserEvent]
+   * or if
+   * [direct_user_request][google.cloud.retail.v2.UserInfo.direct_user_request]
+   * is set.
+   * </pre>
+   *
+   * <code>string user_agent = 3;</code>
+   *
+   * @return The userAgent.
+   */
+  java.lang.String getUserAgent();
+  /**
+   *
+   *
+   * <pre>
+   * User agent as included in the HTTP header.
+   * The field must be a UTF-8 encoded string with a length limit of 1,000
+   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
+   * This should not be set when using the client side event reporting with
+   * GTM or JavaScript tag in
+   * [UserEventService.CollectUserEvent][google.cloud.retail.v2.UserEventService.CollectUserEvent]
+   * or if
+   * [direct_user_request][google.cloud.retail.v2.UserInfo.direct_user_request]
+   * is set.
+   * </pre>
+   *
+   * <code>string user_agent = 3;</code>
+   *
+   * @return The bytes for userAgent.
+   */
+  com.google.protobuf.ByteString getUserAgentBytes();
+
+  /**
+   *
+   *
+   * <pre>
+   * True if the request is made directly from the end user, in which case the
+   * [ip_address][google.cloud.retail.v2.UserInfo.ip_address] and
+   * [user_agent][google.cloud.retail.v2.UserInfo.user_agent] can be populated
+   * from the HTTP request. This flag should be set only if the API request is
+   * made directly from the end user such as a mobile app (and not if a gateway
+   * or a server is processing and pushing the user events).
+   * This should not be set when using the JavaScript tag in
+   * [UserEventService.CollectUserEvent][google.cloud.retail.v2.UserEventService.CollectUserEvent].
+   * </pre>
+   *
+   * <code>bool direct_user_request = 4;</code>
+   *
+   * @return The directUserRequest.
+   */
+  boolean getDirectUserRequest();
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/WriteUserEventRequest.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/WriteUserEventRequest.java
new file mode 100644
index 00000000..f3861ed4
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/WriteUserEventRequest.java
@@ -0,0 +1,943 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/user_event_service.proto
+
+package com.google.cloud.retail.v2;
+
+/**
+ *
+ *
+ * <pre>
+ * Request message for WriteUserEvent method.
+ * </pre>
+ *
+ * Protobuf type {@code google.cloud.retail.v2.WriteUserEventRequest}
+ */
+public final class WriteUserEventRequest extends com.google.protobuf.GeneratedMessageV3
+    implements
+    // @@protoc_insertion_point(message_implements:google.cloud.retail.v2.WriteUserEventRequest)
+    WriteUserEventRequestOrBuilder {
+  private static final long serialVersionUID = 0L;
+  // Use WriteUserEventRequest.newBuilder() to construct.
+  private WriteUserEventRequest(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+    super(builder);
+  }
+
+  private WriteUserEventRequest() {
+    parent_ = "";
+  }
+
+  @java.lang.Override
+  @SuppressWarnings({"unused"})
+  protected java.lang.Object newInstance(UnusedPrivateParameter unused) {
+    return new WriteUserEventRequest();
+  }
+
+  @java.lang.Override
+  public final com.google.protobuf.UnknownFieldSet getUnknownFields() {
+    return this.unknownFields;
+  }
+
+  private WriteUserEventRequest(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    this();
+    if (extensionRegistry == null) {
+      throw new java.lang.NullPointerException();
+    }
+    com.google.protobuf.UnknownFieldSet.Builder unknownFields =
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+    try {
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+      while (!done) {
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+        switch (tag) {
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+            done = true;
+            break;
+          case 10:
+            {
+              java.lang.String s = input.readStringRequireUtf8();
+
+              parent_ = s;
+              break;
+            }
+          case 18:
+            {
+              com.google.cloud.retail.v2.UserEvent.Builder subBuilder = null;
+              if (userEvent_ != null) {
+                subBuilder = userEvent_.toBuilder();
+              }
+              userEvent_ =
+                  input.readMessage(
+                      com.google.cloud.retail.v2.UserEvent.parser(), extensionRegistry);
+              if (subBuilder != null) {
+                subBuilder.mergeFrom(userEvent_);
+                userEvent_ = subBuilder.buildPartial();
+              }
+
+              break;
+            }
+          default:
+            {
+              if (!parseUnknownField(input, unknownFields, extensionRegistry, tag)) {
+                done = true;
+              }
+              break;
+            }
+        }
+      }
+    } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+      throw e.setUnfinishedMessage(this);
+    } catch (java.io.IOException e) {
+      throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
+    } finally {
+      this.unknownFields = unknownFields.build();
+      makeExtensionsImmutable();
+    }
+  }
+
+  public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+    return com.google.cloud.retail.v2.UserEventServiceProto
+        .internal_static_google_cloud_retail_v2_WriteUserEventRequest_descriptor;
+  }
+
+  @java.lang.Override
+  protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internalGetFieldAccessorTable() {
+    return com.google.cloud.retail.v2.UserEventServiceProto
+        .internal_static_google_cloud_retail_v2_WriteUserEventRequest_fieldAccessorTable
+        .ensureFieldAccessorsInitialized(
+            com.google.cloud.retail.v2.WriteUserEventRequest.class,
+            com.google.cloud.retail.v2.WriteUserEventRequest.Builder.class);
+  }
+
+  public static final int PARENT_FIELD_NUMBER = 1;
+  private volatile java.lang.Object parent_;
+  /**
+   *
+   *
+   * <pre>
+   * Required. The parent catalog resource name, such as
+   * "projects/1234/locations/global/catalogs/default_catalog".
+   * </pre>
+   *
+   * <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The parent.
+   */
+  @java.lang.Override
+  public java.lang.String getParent() {
+    java.lang.Object ref = parent_;
+    if (ref instanceof java.lang.String) {
+      return (java.lang.String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+      java.lang.String s = bs.toStringUtf8();
+      parent_ = s;
+      return s;
+    }
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Required. The parent catalog resource name, such as
+   * "projects/1234/locations/global/catalogs/default_catalog".
+   * </pre>
+   *
+   * <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The bytes for parent.
+   */
+  @java.lang.Override
+  public com.google.protobuf.ByteString getParentBytes() {
+    java.lang.Object ref = parent_;
+    if (ref instanceof java.lang.String) {
+      com.google.protobuf.ByteString b =
+          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+      parent_ = b;
+      return b;
+    } else {
+      return (com.google.protobuf.ByteString) ref;
+    }
+  }
+
+  public static final int USER_EVENT_FIELD_NUMBER = 2;
+  private com.google.cloud.retail.v2.UserEvent userEvent_;
+  /**
+   *
+   *
+   * <pre>
+   * Required. User event to write.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.retail.v2.UserEvent user_event = 2 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   *
+   * @return Whether the userEvent field is set.
+   */
+  @java.lang.Override
+  public boolean hasUserEvent() {
+    return userEvent_ != null;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Required. User event to write.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.retail.v2.UserEvent user_event = 2 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   *
+   * @return The userEvent.
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.UserEvent getUserEvent() {
+    return userEvent_ == null
+        ? com.google.cloud.retail.v2.UserEvent.getDefaultInstance()
+        : userEvent_;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Required. User event to write.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.retail.v2.UserEvent user_event = 2 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   */
+  @java.lang.Override
+  public com.google.cloud.retail.v2.UserEventOrBuilder getUserEventOrBuilder() {
+    return getUserEvent();
+  }
+
+  private byte memoizedIsInitialized = -1;
+
+  @java.lang.Override
+  public final boolean isInitialized() {
+    byte isInitialized = memoizedIsInitialized;
+    if (isInitialized == 1) return true;
+    if (isInitialized == 0) return false;
+
+    memoizedIsInitialized = 1;
+    return true;
+  }
+
+  @java.lang.Override
+  public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
+    if (!getParentBytes().isEmpty()) {
+      com.google.protobuf.GeneratedMessageV3.writeString(output, 1, parent_);
+    }
+    if (userEvent_ != null) {
+      output.writeMessage(2, getUserEvent());
+    }
+    unknownFields.writeTo(output);
+  }
+
+  @java.lang.Override
+  public int getSerializedSize() {
+    int size = memoizedSize;
+    if (size != -1) return size;
+
+    size = 0;
+    if (!getParentBytes().isEmpty()) {
+      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(1, parent_);
+    }
+    if (userEvent_ != null) {
+      size += com.google.protobuf.CodedOutputStream.computeMessageSize(2, getUserEvent());
+    }
+    size += unknownFields.getSerializedSize();
+    memoizedSize = size;
+    return size;
+  }
+
+  @java.lang.Override
+  public boolean equals(final java.lang.Object obj) {
+    if (obj == this) {
+      return true;
+    }
+    if (!(obj instanceof com.google.cloud.retail.v2.WriteUserEventRequest)) {
+      return super.equals(obj);
+    }
+    com.google.cloud.retail.v2.WriteUserEventRequest other =
+        (com.google.cloud.retail.v2.WriteUserEventRequest) obj;
+
+    if (!getParent().equals(other.getParent())) return false;
+    if (hasUserEvent() != other.hasUserEvent()) return false;
+    if (hasUserEvent()) {
+      if (!getUserEvent().equals(other.getUserEvent())) return false;
+    }
+    if (!unknownFields.equals(other.unknownFields)) return false;
+    return true;
+  }
+
+  @java.lang.Override
+  public int hashCode() {
+    if (memoizedHashCode != 0) {
+      return memoizedHashCode;
+    }
+    int hash = 41;
+    hash = (19 * hash) + getDescriptor().hashCode();
+    hash = (37 * hash) + PARENT_FIELD_NUMBER;
+    hash = (53 * hash) + getParent().hashCode();
+    if (hasUserEvent()) {
+      hash = (37 * hash) + USER_EVENT_FIELD_NUMBER;
+      hash = (53 * hash) + getUserEvent().hashCode();
+    }
+    hash = (29 * hash) + unknownFields.hashCode();
+    memoizedHashCode = hash;
+    return hash;
+  }
+
+  public static com.google.cloud.retail.v2.WriteUserEventRequest parseFrom(java.nio.ByteBuffer data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.WriteUserEventRequest parseFrom(
+      java.nio.ByteBuffer data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.WriteUserEventRequest parseFrom(
+      com.google.protobuf.ByteString data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.WriteUserEventRequest parseFrom(
+      com.google.protobuf.ByteString data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.WriteUserEventRequest parseFrom(byte[] data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.cloud.retail.v2.WriteUserEventRequest parseFrom(
+      byte[] data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.WriteUserEventRequest parseFrom(
+      java.io.InputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.WriteUserEventRequest parseFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.WriteUserEventRequest parseDelimitedFrom(
+      java.io.InputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.WriteUserEventRequest parseDelimitedFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.cloud.retail.v2.WriteUserEventRequest parseFrom(
+      com.google.protobuf.CodedInputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.cloud.retail.v2.WriteUserEventRequest parseFrom(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  @java.lang.Override
+  public Builder newBuilderForType() {
+    return newBuilder();
+  }
+
+  public static Builder newBuilder() {
+    return DEFAULT_INSTANCE.toBuilder();
+  }
+
+  public static Builder newBuilder(com.google.cloud.retail.v2.WriteUserEventRequest prototype) {
+    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+  }
+
+  @java.lang.Override
+  public Builder toBuilder() {
+    return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
+  }
+
+  @java.lang.Override
+  protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+    Builder builder = new Builder(parent);
+    return builder;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Request message for WriteUserEvent method.
+   * </pre>
+   *
+   * Protobuf type {@code google.cloud.retail.v2.WriteUserEventRequest}
+   */
+  public static final class Builder extends com.google.protobuf.GeneratedMessageV3.Builder<Builder>
+      implements
+      // @@protoc_insertion_point(builder_implements:google.cloud.retail.v2.WriteUserEventRequest)
+      com.google.cloud.retail.v2.WriteUserEventRequestOrBuilder {
+    public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+      return com.google.cloud.retail.v2.UserEventServiceProto
+          .internal_static_google_cloud_retail_v2_WriteUserEventRequest_descriptor;
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return com.google.cloud.retail.v2.UserEventServiceProto
+          .internal_static_google_cloud_retail_v2_WriteUserEventRequest_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              com.google.cloud.retail.v2.WriteUserEventRequest.class,
+              com.google.cloud.retail.v2.WriteUserEventRequest.Builder.class);
+    }
+
+    // Construct using com.google.cloud.retail.v2.WriteUserEventRequest.newBuilder()
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
+
+    private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+      super(parent);
+      maybeForceBuilderInitialization();
+    }
+
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders) {}
+    }
+
+    @java.lang.Override
+    public Builder clear() {
+      super.clear();
+      parent_ = "";
+
+      if (userEventBuilder_ == null) {
+        userEvent_ = null;
+      } else {
+        userEvent_ = null;
+        userEventBuilder_ = null;
+      }
+      return this;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
+      return com.google.cloud.retail.v2.UserEventServiceProto
+          .internal_static_google_cloud_retail_v2_WriteUserEventRequest_descriptor;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.WriteUserEventRequest getDefaultInstanceForType() {
+      return com.google.cloud.retail.v2.WriteUserEventRequest.getDefaultInstance();
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.WriteUserEventRequest build() {
+      com.google.cloud.retail.v2.WriteUserEventRequest result = buildPartial();
+      if (!result.isInitialized()) {
+        throw newUninitializedMessageException(result);
+      }
+      return result;
+    }
+
+    @java.lang.Override
+    public com.google.cloud.retail.v2.WriteUserEventRequest buildPartial() {
+      com.google.cloud.retail.v2.WriteUserEventRequest result =
+          new com.google.cloud.retail.v2.WriteUserEventRequest(this);
+      result.parent_ = parent_;
+      if (userEventBuilder_ == null) {
+        result.userEvent_ = userEvent_;
+      } else {
+        result.userEvent_ = userEventBuilder_.build();
+      }
+      onBuilt();
+      return result;
+    }
+
+    @java.lang.Override
+    public Builder clone() {
+      return super.clone();
+    }
+
+    @java.lang.Override
+    public Builder setField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.setField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
+      return super.clearField(field);
+    }
+
+    @java.lang.Override
+    public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+      return super.clearOneof(oneof);
+    }
+
+    @java.lang.Override
+    public Builder setRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, int index, java.lang.Object value) {
+      return super.setRepeatedField(field, index, value);
+    }
+
+    @java.lang.Override
+    public Builder addRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.addRepeatedField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(com.google.protobuf.Message other) {
+      if (other instanceof com.google.cloud.retail.v2.WriteUserEventRequest) {
+        return mergeFrom((com.google.cloud.retail.v2.WriteUserEventRequest) other);
+      } else {
+        super.mergeFrom(other);
+        return this;
+      }
+    }
+
+    public Builder mergeFrom(com.google.cloud.retail.v2.WriteUserEventRequest other) {
+      if (other == com.google.cloud.retail.v2.WriteUserEventRequest.getDefaultInstance())
+        return this;
+      if (!other.getParent().isEmpty()) {
+        parent_ = other.parent_;
+        onChanged();
+      }
+      if (other.hasUserEvent()) {
+        mergeUserEvent(other.getUserEvent());
+      }
+      this.mergeUnknownFields(other.unknownFields);
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final boolean isInitialized() {
+      return true;
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      com.google.cloud.retail.v2.WriteUserEventRequest parsedMessage = null;
+      try {
+        parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        parsedMessage = (com.google.cloud.retail.v2.WriteUserEventRequest) e.getUnfinishedMessage();
+        throw e.unwrapIOException();
+      } finally {
+        if (parsedMessage != null) {
+          mergeFrom(parsedMessage);
+        }
+      }
+      return this;
+    }
+
+    private java.lang.Object parent_ = "";
+    /**
+     *
+     *
+     * <pre>
+     * Required. The parent catalog resource name, such as
+     * "projects/1234/locations/global/catalogs/default_catalog".
+     * </pre>
+     *
+     * <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @return The parent.
+     */
+    public java.lang.String getParent() {
+      java.lang.Object ref = parent_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        parent_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The parent catalog resource name, such as
+     * "projects/1234/locations/global/catalogs/default_catalog".
+     * </pre>
+     *
+     * <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @return The bytes for parent.
+     */
+    public com.google.protobuf.ByteString getParentBytes() {
+      java.lang.Object ref = parent_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b =
+            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+        parent_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The parent catalog resource name, such as
+     * "projects/1234/locations/global/catalogs/default_catalog".
+     * </pre>
+     *
+     * <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @param value The parent to set.
+     * @return This builder for chaining.
+     */
+    public Builder setParent(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+
+      parent_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The parent catalog resource name, such as
+     * "projects/1234/locations/global/catalogs/default_catalog".
+     * </pre>
+     *
+     * <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearParent() {
+
+      parent_ = getDefaultInstance().getParent();
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. The parent catalog resource name, such as
+     * "projects/1234/locations/global/catalogs/default_catalog".
+     * </pre>
+     *
+     * <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @param value The bytes for parent to set.
+     * @return This builder for chaining.
+     */
+    public Builder setParentBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+
+      parent_ = value;
+      onChanged();
+      return this;
+    }
+
+    private com.google.cloud.retail.v2.UserEvent userEvent_;
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.cloud.retail.v2.UserEvent,
+            com.google.cloud.retail.v2.UserEvent.Builder,
+            com.google.cloud.retail.v2.UserEventOrBuilder>
+        userEventBuilder_;
+    /**
+     *
+     *
+     * <pre>
+     * Required. User event to write.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.UserEvent user_event = 2 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     *
+     * @return Whether the userEvent field is set.
+     */
+    public boolean hasUserEvent() {
+      return userEventBuilder_ != null || userEvent_ != null;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. User event to write.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.UserEvent user_event = 2 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     *
+     * @return The userEvent.
+     */
+    public com.google.cloud.retail.v2.UserEvent getUserEvent() {
+      if (userEventBuilder_ == null) {
+        return userEvent_ == null
+            ? com.google.cloud.retail.v2.UserEvent.getDefaultInstance()
+            : userEvent_;
+      } else {
+        return userEventBuilder_.getMessage();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. User event to write.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.UserEvent user_event = 2 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder setUserEvent(com.google.cloud.retail.v2.UserEvent value) {
+      if (userEventBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        userEvent_ = value;
+        onChanged();
+      } else {
+        userEventBuilder_.setMessage(value);
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. User event to write.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.UserEvent user_event = 2 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder setUserEvent(com.google.cloud.retail.v2.UserEvent.Builder builderForValue) {
+      if (userEventBuilder_ == null) {
+        userEvent_ = builderForValue.build();
+        onChanged();
+      } else {
+        userEventBuilder_.setMessage(builderForValue.build());
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. User event to write.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.UserEvent user_event = 2 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder mergeUserEvent(com.google.cloud.retail.v2.UserEvent value) {
+      if (userEventBuilder_ == null) {
+        if (userEvent_ != null) {
+          userEvent_ =
+              com.google.cloud.retail.v2.UserEvent.newBuilder(userEvent_)
+                  .mergeFrom(value)
+                  .buildPartial();
+        } else {
+          userEvent_ = value;
+        }
+        onChanged();
+      } else {
+        userEventBuilder_.mergeFrom(value);
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. User event to write.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.UserEvent user_event = 2 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public Builder clearUserEvent() {
+      if (userEventBuilder_ == null) {
+        userEvent_ = null;
+        onChanged();
+      } else {
+        userEvent_ = null;
+        userEventBuilder_ = null;
+      }
+
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. User event to write.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.UserEvent user_event = 2 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public com.google.cloud.retail.v2.UserEvent.Builder getUserEventBuilder() {
+
+      onChanged();
+      return getUserEventFieldBuilder().getBuilder();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. User event to write.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.UserEvent user_event = 2 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    public com.google.cloud.retail.v2.UserEventOrBuilder getUserEventOrBuilder() {
+      if (userEventBuilder_ != null) {
+        return userEventBuilder_.getMessageOrBuilder();
+      } else {
+        return userEvent_ == null
+            ? com.google.cloud.retail.v2.UserEvent.getDefaultInstance()
+            : userEvent_;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. User event to write.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.retail.v2.UserEvent user_event = 2 [(.google.api.field_behavior) = REQUIRED];
+     * </code>
+     */
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.cloud.retail.v2.UserEvent,
+            com.google.cloud.retail.v2.UserEvent.Builder,
+            com.google.cloud.retail.v2.UserEventOrBuilder>
+        getUserEventFieldBuilder() {
+      if (userEventBuilder_ == null) {
+        userEventBuilder_ =
+            new com.google.protobuf.SingleFieldBuilderV3<
+                com.google.cloud.retail.v2.UserEvent,
+                com.google.cloud.retail.v2.UserEvent.Builder,
+                com.google.cloud.retail.v2.UserEventOrBuilder>(
+                getUserEvent(), getParentForChildren(), isClean());
+        userEvent_ = null;
+      }
+      return userEventBuilder_;
+    }
+
+    @java.lang.Override
+    public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.setUnknownFields(unknownFields);
+    }
+
+    @java.lang.Override
+    public final Builder mergeUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.mergeUnknownFields(unknownFields);
+    }
+
+    // @@protoc_insertion_point(builder_scope:google.cloud.retail.v2.WriteUserEventRequest)
+  }
+
+  // @@protoc_insertion_point(class_scope:google.cloud.retail.v2.WriteUserEventRequest)
+  private static final com.google.cloud.retail.v2.WriteUserEventRequest DEFAULT_INSTANCE;
+
+  static {
+    DEFAULT_INSTANCE = new com.google.cloud.retail.v2.WriteUserEventRequest();
+  }
+
+  public static com.google.cloud.retail.v2.WriteUserEventRequest getDefaultInstance() {
+    return DEFAULT_INSTANCE;
+  }
+
+  private static final com.google.protobuf.Parser<WriteUserEventRequest> PARSER =
+      new com.google.protobuf.AbstractParser<WriteUserEventRequest>() {
+        @java.lang.Override
+        public WriteUserEventRequest parsePartialFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws com.google.protobuf.InvalidProtocolBufferException {
+          return new WriteUserEventRequest(input, extensionRegistry);
+        }
+      };
+
+  public static com.google.protobuf.Parser<WriteUserEventRequest> parser() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.protobuf.Parser<WriteUserEventRequest> getParserForType() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.cloud.retail.v2.WriteUserEventRequest getDefaultInstanceForType() {
+    return DEFAULT_INSTANCE;
+  }
+}
diff --git a/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/WriteUserEventRequestOrBuilder.java b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/WriteUserEventRequestOrBuilder.java
new file mode 100644
index 00000000..c408b047
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/java/com/google/cloud/retail/v2/WriteUserEventRequestOrBuilder.java
@@ -0,0 +1,93 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/cloud/retail/v2/user_event_service.proto
+
+package com.google.cloud.retail.v2;
+
+public interface WriteUserEventRequestOrBuilder
+    extends
+    // @@protoc_insertion_point(interface_extends:google.cloud.retail.v2.WriteUserEventRequest)
+    com.google.protobuf.MessageOrBuilder {
+
+  /**
+   *
+   *
+   * <pre>
+   * Required. The parent catalog resource name, such as
+   * "projects/1234/locations/global/catalogs/default_catalog".
+   * </pre>
+   *
+   * <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The parent.
+   */
+  java.lang.String getParent();
+  /**
+   *
+   *
+   * <pre>
+   * Required. The parent catalog resource name, such as
+   * "projects/1234/locations/global/catalogs/default_catalog".
+   * </pre>
+   *
+   * <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The bytes for parent.
+   */
+  com.google.protobuf.ByteString getParentBytes();
+
+  /**
+   *
+   *
+   * <pre>
+   * Required. User event to write.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.retail.v2.UserEvent user_event = 2 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   *
+   * @return Whether the userEvent field is set.
+   */
+  boolean hasUserEvent();
+  /**
+   *
+   *
+   * <pre>
+   * Required. User event to write.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.retail.v2.UserEvent user_event = 2 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   *
+   * @return The userEvent.
+   */
+  com.google.cloud.retail.v2.UserEvent getUserEvent();
+  /**
+   *
+   *
+   * <pre>
+   * Required. User event to write.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.retail.v2.UserEvent user_event = 2 [(.google.api.field_behavior) = REQUIRED];
+   * </code>
+   */
+  com.google.cloud.retail.v2.UserEventOrBuilder getUserEventOrBuilder();
+}
diff --git a/proto-google-cloud-retail-v2/src/main/proto/google/cloud/retail/v2/catalog.proto b/proto-google-cloud-retail-v2/src/main/proto/google/cloud/retail/v2/catalog.proto
new file mode 100644
index 00000000..ded4ebd0
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/proto/google/cloud/retail/v2/catalog.proto
@@ -0,0 +1,111 @@
+// Copyright 2020 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+syntax = "proto3";
+
+package google.cloud.retail.v2;
+
+import "google/api/annotations.proto";
+import "google/api/field_behavior.proto";
+import "google/api/resource.proto";
+
+option csharp_namespace = "Google.Cloud.Retail.V2";
+option go_package = "google.golang.org/genproto/googleapis/cloud/retail/v2;retail";
+option java_multiple_files = true;
+option java_outer_classname = "CatalogProto";
+option java_package = "com.google.cloud.retail.v2";
+option objc_class_prefix = "RETAIL";
+option php_namespace = "Google\\Cloud\\Retail\\V2";
+option ruby_package = "Google::Cloud::Retail::V2";
+
+// Configures what level the product should be uploaded with regards to
+// how users will be send events and how predictions will be made.
+message ProductLevelConfig {
+  // The type of [Product][google.cloud.retail.v2.Product]s allowed to be
+  // ingested into the catalog. Acceptable values are:
+  //
+  // * `primary` (default): You can only ingest
+  // [Product.Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
+  //   [Product][google.cloud.retail.v2.Product]s. This means
+  //   [Product.primary_product_id][google.cloud.retail.v2.Product.primary_product_id]
+  //   can only be empty or set to the same value as
+  //   [Product.id][google.cloud.retail.v2.Product.id].
+  // * `variant`: You can only ingest
+  // [Product.Type.VARIANT][google.cloud.retail.v2.Product.Type.VARIANT]
+  // [Product][google.cloud.retail.v2.Product]s.
+  //   This means
+  //   [Product.primary_product_id][google.cloud.retail.v2.Product.primary_product_id]
+  //   cannot be empty.
+  //
+  // If this field is set to an invalid value other than these, an
+  // INVALID_ARGUMENT error is returned.
+  //
+  // If this field is `variant` and
+  // [merchant_center_product_id_field][google.cloud.retail.v2.ProductLevelConfig.merchant_center_product_id_field]
+  // is `itemGroupId`, an INVALID_ARGUMENT error is returned.
+  //
+  // See [Using catalog
+  // levels](/retail/recommendations-ai/docs/catalog#catalog-levels) for more
+  // details.
+  string ingestion_product_type = 1;
+
+  // Which field of [Merchant Center
+  // Product](/bigquery-transfer/docs/merchant-center-products-schema) should be
+  // imported as [Product.id][google.cloud.retail.v2.Product.id]. Acceptable
+  // values are:
+  //
+  // * `offerId` (default): Import `offerId` as the product ID.
+  // * `itemGroupId`: Import `itemGroupId` as the product ID. Notice that Retail
+  //   API will choose one item from the ones with the same `itemGroupId`, and
+  //   use it to represent the item group.
+  //
+  // If this field is set to an invalid value other than these, an
+  // INVALID_ARGUMENT error is returned.
+  //
+  // If this field is `itemGroupId` and
+  // [ingestion_product_type][google.cloud.retail.v2.ProductLevelConfig.ingestion_product_type]
+  // is `variant`, an INVALID_ARGUMENT error is returned.
+  //
+  // See [Using catalog
+  // levels](/retail/recommendations-ai/docs/catalog#catalog-levels) for more
+  // details.
+  string merchant_center_product_id_field = 2;
+}
+
+// The catalog configuration.
+message Catalog {
+  option (google.api.resource) = {
+    type: "retail.googleapis.com/Catalog"
+    pattern: "projects/{project}/locations/{location}/catalogs/{catalog}"
+  };
+
+  // Required. Immutable. The fully qualified resource name of the catalog.
+  string name = 1 [
+    (google.api.field_behavior) = REQUIRED,
+    (google.api.field_behavior) = IMMUTABLE
+  ];
+
+  // Required. Immutable. The catalog display name.
+  //
+  // This field must be a UTF-8 encoded string with a length limit of 128
+  // characters. Otherwise, an INVALID_ARGUMENT error is returned.
+  string display_name = 2 [
+    (google.api.field_behavior) = REQUIRED,
+    (google.api.field_behavior) = IMMUTABLE
+  ];
+
+  // Required. The product level configuration.
+  ProductLevelConfig product_level_config = 4
+      [(google.api.field_behavior) = REQUIRED];
+}
diff --git a/proto-google-cloud-retail-v2/src/main/proto/google/cloud/retail/v2/catalog_service.proto b/proto-google-cloud-retail-v2/src/main/proto/google/cloud/retail/v2/catalog_service.proto
new file mode 100644
index 00000000..4adda8df
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/proto/google/cloud/retail/v2/catalog_service.proto
@@ -0,0 +1,136 @@
+// Copyright 2020 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+syntax = "proto3";
+
+package google.cloud.retail.v2;
+
+import "google/api/annotations.proto";
+import "google/api/client.proto";
+import "google/api/field_behavior.proto";
+import "google/api/resource.proto";
+import "google/cloud/retail/v2/catalog.proto";
+import "google/protobuf/empty.proto";
+import "google/protobuf/field_mask.proto";
+import "google/protobuf/timestamp.proto";
+
+option csharp_namespace = "Google.Cloud.Retail.V2";
+option go_package = "google.golang.org/genproto/googleapis/cloud/retail/v2;retail";
+option java_multiple_files = true;
+option java_outer_classname = "CatalogServiceProto";
+option java_package = "com.google.cloud.retail.v2";
+option objc_class_prefix = "RETAIL";
+option php_namespace = "Google\\Cloud\\Retail\\V2";
+option ruby_package = "Google::Cloud::Retail::V2";
+
+// Service for managing catalog configuration.
+service CatalogService {
+  option (google.api.default_host) = "retail.googleapis.com";
+  option (google.api.oauth_scopes) =
+      "https://www.googleapis.com/auth/cloud-platform";
+
+  // Lists all the [Catalog][google.cloud.retail.v2.Catalog]s associated with
+  // the project.
+  rpc ListCatalogs(ListCatalogsRequest) returns (ListCatalogsResponse) {
+    option (google.api.http) = {
+      get: "/v2/{parent=projects/*/locations/*}/catalogs"
+    };
+    option (google.api.method_signature) = "parent";
+  }
+
+  // Updates the [Catalog][google.cloud.retail.v2.Catalog]s.
+  rpc UpdateCatalog(UpdateCatalogRequest) returns (Catalog) {
+    option (google.api.http) = {
+      patch: "/v2/{catalog.name=projects/*/locations/*/catalogs/*}"
+      body: "catalog"
+    };
+    option (google.api.method_signature) = "catalog,update_mask";
+  }
+}
+
+// Request for
+// [CatalogService.ListCatalogs][google.cloud.retail.v2.CatalogService.ListCatalogs]
+// method.
+message ListCatalogsRequest {
+  // Required. The account resource name with an associated location.
+  //
+  // If the caller does not have permission to list
+  // [Catalog][google.cloud.retail.v2.Catalog]s under this location, regardless
+  // of whether or not this location exists, a PERMISSION_DENIED error is
+  // returned.
+  string parent = 1 [
+    (google.api.field_behavior) = REQUIRED,
+    (google.api.resource_reference) = {
+      type: "locations.googleapis.com/Location"
+    }
+  ];
+
+  // Maximum number of [Catalog][google.cloud.retail.v2.Catalog]s to return. If
+  // unspecified, defaults to 50. The maximum allowed value is 1000. Values
+  // above 1000 will be coerced to 1000.
+  //
+  // If this field is negative, an INVALID_ARGUMENT is returned.
+  int32 page_size = 2;
+
+  // A page token
+  // [ListCatalogsResponse.next_page_token][google.cloud.retail.v2.ListCatalogsResponse.next_page_token],
+  // received from a previous
+  // [CatalogService.ListCatalogs][google.cloud.retail.v2.CatalogService.ListCatalogs]
+  // call. Provide this to retrieve the subsequent page.
+  //
+  // When paginating, all other parameters provided to
+  // [CatalogService.ListCatalogs][google.cloud.retail.v2.CatalogService.ListCatalogs]
+  // must match the call that provided the page token. Otherwise, an
+  // INVALID_ARGUMENT error is returned.
+  string page_token = 3;
+}
+
+// Response for
+// [CatalogService.ListCatalogs][google.cloud.retail.v2.CatalogService.ListCatalogs]
+// method.
+message ListCatalogsResponse {
+  // All the customer's [Catalog][google.cloud.retail.v2.Catalog]s.
+  repeated Catalog catalogs = 1;
+
+  // A token that can be sent as
+  // [ListCatalogsRequest.page_token][google.cloud.retail.v2.ListCatalogsRequest.page_token]
+  // to retrieve the next page. If this field is omitted, there are no
+  // subsequent pages.
+  string next_page_token = 2;
+}
+
+// Request for
+// [CatalogService.UpdateCatalog][google.cloud.retail.v2.CatalogService.UpdateCatalog]
+// method.
+message UpdateCatalogRequest {
+  // Required. The [Catalog][google.cloud.retail.v2.Catalog] to update.
+  //
+  // If the caller does not have permission to update the
+  // [Catalog][google.cloud.retail.v2.Catalog], regardless of whether or not it
+  // exists, a PERMISSION_DENIED error is returned.
+  //
+  // If the [Catalog][google.cloud.retail.v2.Catalog] to update does not exist,
+  // a NOT_FOUND error is returned.
+  Catalog catalog = 1 [(google.api.field_behavior) = REQUIRED];
+
+  // Indicates which fields in the provided
+  // [Catalog][google.cloud.retail.v2.Catalog] to update. If not set, will only
+  // update the
+  // [Catalog.product_level_config][google.cloud.retail.v2.Catalog.product_level_config]
+  // field, which is also the only currently supported field to update.
+  //
+  // If an unsupported or unknown field is provided, an INVALID_ARGUMENT error
+  // is returned.
+  google.protobuf.FieldMask update_mask = 2;
+}
diff --git a/proto-google-cloud-retail-v2/src/main/proto/google/cloud/retail/v2/common.proto b/proto-google-cloud-retail-v2/src/main/proto/google/cloud/retail/v2/common.proto
new file mode 100644
index 00000000..341126af
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/proto/google/cloud/retail/v2/common.proto
@@ -0,0 +1,161 @@
+// Copyright 2020 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+syntax = "proto3";
+
+package google.cloud.retail.v2;
+
+import "google/api/annotations.proto";
+import "google/api/field_behavior.proto";
+import "google/protobuf/timestamp.proto";
+
+option csharp_namespace = "Google.Cloud.Retail.V2";
+option go_package = "google.golang.org/genproto/googleapis/cloud/retail/v2;retail";
+option java_multiple_files = true;
+option java_outer_classname = "CommonProto";
+option java_package = "com.google.cloud.retail.v2";
+option objc_class_prefix = "RETAIL";
+option php_namespace = "Google\\Cloud\\Retail\\V2";
+option ruby_package = "Google::Cloud::Retail::V2";
+
+// A custom attribute that is not explicitly modeled in
+// [Product][google.cloud.retail.v2.Product]].
+message CustomAttribute {
+  // The textual values of this custom attribute. For example, `["yellow",
+  // "green"]` when the key is "color".
+  //
+  // At most 400 values are allowed. Empty values are not allowed. Each value
+  // must be a UTF-8 encoded string with a length limit of 256 characters.
+  // Otherwise, an INVALID_ARGUMENT error is returned.
+  //
+  // Exactly one of [text][google.cloud.retail.v2.CustomAttribute.text] or
+  // [numbers][google.cloud.retail.v2.CustomAttribute.numbers] should be set.
+  // Otherwise, an INVALID_ARGUMENT error is returned.
+  repeated string text = 1;
+
+  // The numerical values of this custom attribute. For example, `[2.3, 15.4]`
+  // when the key is "lengths_cm".
+  //
+  // At most 400 values are allowed.Otherwise, an INVALID_ARGUMENT error is
+  // returned.
+  //
+  // Exactly one of [text][google.cloud.retail.v2.CustomAttribute.text] or
+  // [numbers][google.cloud.retail.v2.CustomAttribute.numbers] should be set.
+  // Otherwise, an INVALID_ARGUMENT error is returned.
+  repeated double numbers = 2;
+}
+
+// [Product][google.cloud.retail.v2.Product] thumbnail/detail image.
+message Image {
+  // Required. URI of the image.
+  //
+  // This field must be a valid UTF-8 encoded URI with a length limit of 5,000
+  // characters. Otherwise, an INVALID_ARGUMENT error is returned.
+  //
+  // Google Merchant Center property
+  // [image_link](https://support.google.com/merchants/answer/6324350).
+  // Schema.org property [Product.image](https://schema.org/image).
+  string uri = 1 [(google.api.field_behavior) = REQUIRED];
+
+  // Height of the image in number of pixels.
+  //
+  // This field must be nonnegative. Otherwise, an INVALID_ARGUMENT error is
+  // returned.
+  int32 height = 2;
+
+  // Width of the image in number of pixels.
+  //
+  // This field must be nonnegative. Otherwise, an INVALID_ARGUMENT error is
+  // returned.
+  int32 width = 3;
+}
+
+// The price information of a [Product][google.cloud.retail.v2.Product].
+message PriceInfo {
+  // The 3-letter currency code defined in [ISO
+  // 4217](https://www.iso.org/iso-4217-currency-codes.html).
+  //
+  // If this field is an unrecognizable currency code, an INVALID_ARGUMENT
+  // error is returned.
+  string currency_code = 1;
+
+  // Price of the product.
+  //
+  // Google Merchant Center property
+  // [price](https://support.google.com/merchants/answer/6324371). Schema.org
+  // property [Offer.priceSpecification](https://schema.org/priceSpecification).
+  float price = 2;
+
+  // Price of the product without any discount. If zero, by default set to be
+  // the [price][google.cloud.retail.v2.PriceInfo.price].
+  float original_price = 3;
+
+  // The costs associated with the sale of a particular product. Used for gross
+  // profit reporting.
+  //
+  // * Profit = [price][google.cloud.retail.v2.PriceInfo.price] -
+  // [cost][google.cloud.retail.v2.PriceInfo.cost]
+  //
+  // Google Merchant Center property
+  // [cost_of_goods_sold](https://support.google.com/merchants/answer/9017895).
+  float cost = 4;
+}
+
+// Information of an end user.
+message UserInfo {
+  // Highly recommended for logged-in users. Unique identifier for logged-in
+  // user, such as a user name.
+  //
+  // The field must be a UTF-8 encoded string with a length limit of 128
+  // characters. Otherwise, an INVALID_ARGUMENT error is returned.
+  string user_id = 1;
+
+  // The end user's IP address. This field is used to extract location
+  // information for personalization.
+  //
+  // This field must be either an IPv4 address (e.g. "104.133.9.80") or an IPv6
+  // address (e.g. "2001:0db8:85a3:0000:0000:8a2e:0370:7334"). Otherwise, an
+  // INVALID_ARGUMENT error is returned.
+  //
+  // This should not be set when using the JavaScript tag in
+  // [UserEventService.CollectUserEvent][google.cloud.retail.v2.UserEventService.CollectUserEvent]
+  // or if
+  // [direct_user_request][google.cloud.retail.v2.UserInfo.direct_user_request]
+  // is set.
+  string ip_address = 2;
+
+  // User agent as included in the HTTP header.
+  //
+  // The field must be a UTF-8 encoded string with a length limit of 1,000
+  // characters. Otherwise, an INVALID_ARGUMENT error is returned.
+  //
+  // This should not be set when using the client side event reporting with
+  // GTM or JavaScript tag in
+  // [UserEventService.CollectUserEvent][google.cloud.retail.v2.UserEventService.CollectUserEvent]
+  // or if
+  // [direct_user_request][google.cloud.retail.v2.UserInfo.direct_user_request]
+  // is set.
+  string user_agent = 3;
+
+  // True if the request is made directly from the end user, in which case the
+  // [ip_address][google.cloud.retail.v2.UserInfo.ip_address] and
+  // [user_agent][google.cloud.retail.v2.UserInfo.user_agent] can be populated
+  // from the HTTP request. This flag should be set only if the API request is
+  // made directly from the end user such as a mobile app (and not if a gateway
+  // or a server is processing and pushing the user events).
+  //
+  // This should not be set when using the JavaScript tag in
+  // [UserEventService.CollectUserEvent][google.cloud.retail.v2.UserEventService.CollectUserEvent].
+  bool direct_user_request = 4;
+}
diff --git a/proto-google-cloud-retail-v2/src/main/proto/google/cloud/retail/v2/import_config.proto b/proto-google-cloud-retail-v2/src/main/proto/google/cloud/retail/v2/import_config.proto
new file mode 100644
index 00000000..cece6d5d
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/proto/google/cloud/retail/v2/import_config.proto
@@ -0,0 +1,251 @@
+// Copyright 2020 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+syntax = "proto3";
+
+package google.cloud.retail.v2;
+
+import "google/api/annotations.proto";
+import "google/api/field_behavior.proto";
+import "google/cloud/retail/v2/product.proto";
+import "google/cloud/retail/v2/user_event.proto";
+import "google/protobuf/field_mask.proto";
+import "google/protobuf/timestamp.proto";
+import "google/rpc/status.proto";
+
+option csharp_namespace = "Google.Cloud.Retail.V2";
+option go_package = "google.golang.org/genproto/googleapis/cloud/retail/v2;retail";
+option java_multiple_files = true;
+option java_outer_classname = "ImportConfigProto";
+option java_package = "com.google.cloud.retail.v2";
+option objc_class_prefix = "RETAIL";
+option php_namespace = "Google\\Cloud\\Retail\\V2";
+option ruby_package = "Google::Cloud::Retail::V2";
+
+// Google Cloud Storage location for input content.
+// format.
+message GcsSource {
+  // Required. Google Cloud Storage URIs to input files. URI can be up to
+  // 2000 characters long. URIs can match the full object path (for example,
+  // gs://bucket/directory/object.json) or a pattern matching one or more
+  // files, such as gs://bucket/directory/*.json. A request can
+  // contain at most 100 files, and each file can be up to 2 GB. See
+  // [Importing product information](/recommendations-ai/docs/upload-catalog)
+  // for the expected file format and setup instructions.
+  repeated string input_uris = 1 [(google.api.field_behavior) = REQUIRED];
+
+  // The schema to use when parsing the data from the source.
+  //
+  // Supported values for product imports:
+  //
+  // * `product` (default): One JSON [Product][google.cloud.retail.v2.Product]
+  // per line. Each product must
+  //   have a valid [Product.id][google.cloud.retail.v2.Product.id].
+  // * `product_merchant_center`: See [Importing catalog data from Merchant
+  //   Center](/retail/recommendations-ai/docs/upload-catalog#mc).
+  //
+  // Supported values for user events imports:
+  //
+  // * `user_event` (default): One JSON
+  // [UserEvent][google.cloud.retail.v2.UserEvent] per line.
+  // * `user_event_ga360`: Using
+  //   https://support.google.com/analytics/answer/3437719?hl=en.
+  string data_schema = 2;
+}
+
+// BigQuery source import data from.
+message BigQuerySource {
+  // The project id (can be project # or id) that the BigQuery source is in with
+  // a length limit of 128 characters. If not specified, inherits the project
+  // id from the parent request.
+  string project_id = 5;
+
+  // Required. The BigQuery data set to copy the data from with a length limit
+  // of 1,024 characters.
+  string dataset_id = 1 [(google.api.field_behavior) = REQUIRED];
+
+  // Required. The BigQuery table to copy the data from with a length limit of
+  // 1,024 characters.
+  string table_id = 2 [(google.api.field_behavior) = REQUIRED];
+
+  // Intermediate Cloud Storage directory used for the import with a length
+  // limit of 2,000 characters. Can be specified if one wants to have the
+  // BigQuery export to a specific Cloud Storage directory.
+  string gcs_staging_dir = 3;
+
+  // The schema to use when parsing the data from the source.
+  //
+  // Supported values for product imports:
+  //
+  // * `product` (default): One JSON [Product][google.cloud.retail.v2.Product]
+  // per line. Each product must
+  //   have a valid [Product.id][google.cloud.retail.v2.Product.id].
+  // * `product_merchant_center`: See [Importing catalog data from Merchant
+  //   Center](/retail/recommendations-ai/docs/upload-catalog#mc).
+  //
+  // Supported values for user events imports:
+  //
+  // * `user_event` (default): One JSON
+  // [UserEvent][google.cloud.retail.v2.UserEvent] per line.
+  // * `user_event_ga360`: Using
+  //   https://support.google.com/analytics/answer/3437719?hl=en.
+  string data_schema = 4;
+}
+
+// The inline source for the input config for ImportProducts method.
+message ProductInlineSource {
+  // Required. A list of products to update/create. Each product must have a
+  // valid [Product.id][google.cloud.retail.v2.Product.id]. Recommended max of
+  // 10k items.
+  repeated Product products = 1 [(google.api.field_behavior) = REQUIRED];
+}
+
+// The inline source for the input config for ImportUserEvents method.
+message UserEventInlineSource {
+  // Required. A list of user events to import. Recommended max of 10k items.
+  repeated UserEvent user_events = 1 [(google.api.field_behavior) = REQUIRED];
+}
+
+// Configuration of destination for Import related errors.
+message ImportErrorsConfig {
+  // Required. Errors destination.
+  oneof destination {
+    // Google Cloud Storage path for import errors. This must be an empty,
+    // existing Cloud Storage bucket. Import errors will be written to a file in
+    // this bucket, one per line, as a JSON-encoded
+    // `google.rpc.Status` message.
+    string gcs_prefix = 1;
+  }
+}
+
+// Request message for Import methods.
+message ImportProductsRequest {
+  // Required.
+  // "projects/1234/locations/global/catalogs/default_catalog/branches/default_branch"
+  //
+  // If no updateMask is specified, requires products.create permission.
+  // If updateMask is specified, requires products.update permission.
+  string parent = 1 [(google.api.field_behavior) = REQUIRED];
+
+  // Required. The desired input location of the data.
+  ProductInputConfig input_config = 2 [(google.api.field_behavior) = REQUIRED];
+
+  // The desired location of errors incurred during the Import.
+  ImportErrorsConfig errors_config = 3;
+
+  // Indicates which fields in the provided imported 'products' to update. If
+  // not set, will by default update all fields.
+  google.protobuf.FieldMask update_mask = 4;
+}
+
+// Request message for the ImportUserEvents request.
+message ImportUserEventsRequest {
+  // Required. "projects/1234/locations/global/catalogs/default_catalog"
+  string parent = 1 [(google.api.field_behavior) = REQUIRED];
+
+  // Required. The desired input location of the data.
+  UserEventInputConfig input_config = 2
+      [(google.api.field_behavior) = REQUIRED];
+
+  // The desired location of errors incurred during the Import. Cannot be set
+  // for inline user event imports.
+  ImportErrorsConfig errors_config = 3;
+}
+
+// The input config source for products.
+message ProductInputConfig {
+  // Required. The source of the input.
+  oneof source {
+    // The Inline source for the input content for products.
+    ProductInlineSource product_inline_source = 1;
+
+    // Google Cloud Storage location for the input content.
+    GcsSource gcs_source = 2;
+
+    // BigQuery input source.
+    BigQuerySource big_query_source = 3;
+  }
+}
+
+// The input config source for user events.
+message UserEventInputConfig {
+  // The source of the input.
+  oneof source {
+    // Required. The Inline source for the input content for UserEvents.
+    UserEventInlineSource user_event_inline_source = 1
+        [(google.api.field_behavior) = REQUIRED];
+
+    // Required. Google Cloud Storage location for the input content.
+    GcsSource gcs_source = 2 [(google.api.field_behavior) = REQUIRED];
+
+    // Required. BigQuery input source.
+    BigQuerySource big_query_source = 3
+        [(google.api.field_behavior) = REQUIRED];
+  }
+}
+
+// Metadata related to the progress of the Import operation. This will be
+// returned by the google.longrunning.Operation.metadata field.
+message ImportMetadata {
+  // Operation create time.
+  google.protobuf.Timestamp create_time = 1;
+
+  // Operation last update time. If the operation is done, this is also the
+  // finish time.
+  google.protobuf.Timestamp update_time = 2;
+
+  // Count of entries that were processed successfully.
+  int64 success_count = 3;
+
+  // Count of entries that encountered errors while processing.
+  int64 failure_count = 4;
+}
+
+// Response of the
+// [ImportProductsRequest][google.cloud.retail.v2.ImportProductsRequest]. If the
+// long running operation is done, then this message is returned by the
+// google.longrunning.Operations.response field if the operation was successful.
+message ImportProductsResponse {
+  // A sample of errors encountered while processing the request.
+  repeated google.rpc.Status error_samples = 1;
+
+  // Echoes the destination for the complete errors in the request if set.
+  ImportErrorsConfig errors_config = 2;
+}
+
+// Response of the ImportUserEventsRequest. If the long running
+// operation was successful, then this message is returned by the
+// google.longrunning.Operations.response field if the operation was successful.
+message ImportUserEventsResponse {
+  // A sample of errors encountered while processing the request.
+  repeated google.rpc.Status error_samples = 1;
+
+  // Echoes the destination for the complete errors if this field was set in
+  // the request.
+  ImportErrorsConfig errors_config = 2;
+
+  // Aggregated statistics of user event import status.
+  UserEventImportSummary import_summary = 3;
+}
+
+// A summary of import result. The UserEventImportSummary summarizes
+// the import status for user events.
+message UserEventImportSummary {
+  // Count of user events imported with complete existing catalog information.
+  int64 joined_events_count = 1;
+
+  // Count of user events imported, but with catalog information not found
+  // in the imported catalog.
+  int64 unjoined_events_count = 2;
+}
diff --git a/proto-google-cloud-retail-v2/src/main/proto/google/cloud/retail/v2/prediction_service.proto b/proto-google-cloud-retail-v2/src/main/proto/google/cloud/retail/v2/prediction_service.proto
new file mode 100644
index 00000000..d5f68ebd
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/proto/google/cloud/retail/v2/prediction_service.proto
@@ -0,0 +1,190 @@
+// Copyright 2020 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+syntax = "proto3";
+
+package google.cloud.retail.v2;
+
+import "google/api/annotations.proto";
+import "google/api/client.proto";
+import "google/api/field_behavior.proto";
+import "google/cloud/retail/v2/user_event.proto";
+import "google/protobuf/struct.proto";
+
+option csharp_namespace = "Google.Cloud.Retail.V2";
+option go_package = "google.golang.org/genproto/googleapis/cloud/retail/v2;retail";
+option java_multiple_files = true;
+option java_outer_classname = "PredictionServiceProto";
+option java_package = "com.google.cloud.retail.v2";
+option objc_class_prefix = "RETAIL";
+option php_namespace = "Google\\Cloud\\Retail\\V2";
+option ruby_package = "Google::Cloud::Retail::V2";
+
+// Service for making recommendation prediction.
+service PredictionService {
+  option (google.api.default_host) = "retail.googleapis.com";
+  option (google.api.oauth_scopes) =
+      "https://www.googleapis.com/auth/cloud-platform";
+
+  // Makes a recommendation prediction.
+  rpc Predict(PredictRequest) returns (PredictResponse) {
+    option (google.api.http) = {
+      post: "/v2/{placement=projects/*/locations/*/catalogs/*/placements/*}:predict"
+      body: "*"
+    };
+  }
+}
+
+// Request message for Predict method.
+message PredictRequest {
+  // Required. Full resource name of the format:
+  // {name=projects/*/locations/global/catalogs/default_catalog/placements/*}
+  // The id of the recommendation engine placement. This id is used to identify
+  // the set of models that will be used to make the prediction.
+  //
+  // We currently support three placements with the following IDs by default:
+  //
+  // * `shopping_cart`: Predicts products frequently bought together with one or
+  //   more  products in the same shopping session. Commonly displayed after
+  //   `add-to-cart` events, on product detail pages, or on the shopping cart
+  //   page.
+  //
+  // * `home_page`: Predicts the next product that a user will most likely
+  //   engage with or purchase based on the shopping or viewing history of the
+  //   specified `userId` or `visitorId`. For example - Recommendations for you.
+  //
+  // * `product_detail`: Predicts the next product that a user will most likely
+  //   engage with or purchase. The prediction is based on the shopping or
+  //   viewing history of the specified `userId` or `visitorId` and its
+  //   relevance to a specified `CatalogItem`. Typically used on product detail
+  //   pages. For example - More products like this.
+  //
+  // * `recently_viewed_default`: Returns up to 75 products recently viewed by
+  //   the specified `userId` or `visitorId`, most recent ones first. Returns
+  //   nothing if neither of them has viewed any products yet. For example -
+  //   Recently viewed.
+  //
+  // The full list of available placements can be seen at
+  // https://console.cloud.google.com/recommendation/catalogs/default_catalog/placements
+  string placement = 1 [(google.api.field_behavior) = REQUIRED];
+
+  // Required. Context about the user, what they are looking at and what action
+  // they took to trigger the predict request. Note that this user event detail
+  // won't be ingested to userEvent logs. Thus, a separate userEvent write
+  // request is required for event logging.
+  UserEvent user_event = 2 [(google.api.field_behavior) = REQUIRED];
+
+  // Maximum number of results to return per page. Set this property
+  // to the number of prediction results needed. If zero, the service will
+  // choose a reasonable default. The maximum allowed value is 100. Values
+  // above 100 will be coerced to 100.
+  int32 page_size = 3;
+
+  // The previous PredictResponse.next_page_token.
+  string page_token = 4;
+
+  // Filter for restricting prediction results with a length limit of 5,000
+  // characters. Accepts values for tags and the `filterOutOfStockItems` flag.
+  //
+  //  * Tag expressions. Restricts predictions to products that match all of the
+  //    specified tags. Boolean operators `OR` and `NOT` are supported if the
+  //    expression is enclosed in parentheses, and must be separated from the
+  //    tag values by a space. `-"tagA"` is also supported and is equivalent to
+  //    `NOT "tagA"`. Tag values must be double quoted UTF-8 encoded strings
+  //    with a size limit of 1,000 characters.
+  //
+  //  * filterOutOfStockItems. Restricts predictions to products that do not
+  //  have a
+  //    stockState value of OUT_OF_STOCK.
+  //
+  // Examples:
+  //
+  //  * tag=("Red" OR "Blue") tag="New-Arrival" tag=(NOT "promotional")
+  //  * filterOutOfStockItems  tag=(-"promotional")
+  //  * filterOutOfStockItems
+  //
+  // If your filter blocks all prediction results, nothing will be returned. If
+  // you want generic (unfiltered) popular products to be returned instead, set
+  // `strictFiltering` to false in `PredictRequest.params`.
+  string filter = 5;
+
+  // Use validate only mode for this prediction query. If set to true, a
+  // dummy model will be used that returns arbitrary products.
+  // Note that the validate only mode should only be used for testing the API,
+  // or if the model is not ready.
+  bool validate_only = 6;
+
+  // Additional domain specific parameters for the predictions.
+  //
+  // Allowed values:
+  //
+  // * `returnProduct`: Boolean. If set to true, the associated product
+  //    object will be returned in the `results.metadata` field in the
+  //    prediction response.
+  // * `returnScore`: Boolean. If set to true, the prediction 'score'
+  //    corresponding to each returned product will be set in the
+  //    `results.metadata` field in the prediction response. The given
+  //    'score' indicates the probability of an product being clicked/purchased
+  //    given the user's context and history.
+  // * `strictFiltering`: Boolean. True by default. If set to false, the service
+  //    will return generic (unfiltered) popular products instead of empty if
+  //    your filter blocks all prediction results.
+  map<string, google.protobuf.Value> params = 7;
+
+  // The labels for the predict request.
+  //
+  //  * Label keys can contain lowercase letters, digits and hyphens, must start
+  //    with a letter, and must end with a letter or digit.
+  //  * Non-zero label values can contain lowercase letters, digits and hyphens,
+  //    must start with a letter, and must end with a letter or digit.
+  //  * No more than 64 labels can be associated with a given request.
+  //
+  // See https://goo.gl/xmQnxf for more information on and examples of labels.
+  map<string, string> labels = 8;
+}
+
+// Response message for predict method.
+message PredictResponse {
+  // PredictionResult represents the recommendation prediction results.
+  message PredictionResult {
+    // ID of the recommended product
+    string id = 1;
+
+    // Additional product metadata / annotations.
+    //
+    // Possible values:
+    //
+    // * `product`: JSON representation of the product. Will be set if
+    //   `returnProduct` is set to true in `PredictRequest.params`.
+    // * `score`: Prediction score in double value. Will be set if
+    //   `returnScore` is set to true in `PredictRequest.params`.
+    map<string, google.protobuf.Value> metadata = 2;
+  }
+
+  // A list of recommended products. The order represents the ranking (from the
+  // most relevant product to the least).
+  repeated PredictionResult results = 1;
+
+  // A unique attribution token. This should be included in the
+  // [UserEvent][google.cloud.retail.v2.UserEvent] logs resulting from this
+  // recommendation, which enables accurate attribution of recommendation model
+  // performance.
+  string attribution_token = 2;
+
+  // IDs of products in the request that were missing from the inventory.
+  repeated string missing_ids = 3;
+
+  // True if the validateOnly property was set in the request.
+  bool validate_only = 4;
+}
diff --git a/proto-google-cloud-retail-v2/src/main/proto/google/cloud/retail/v2/product.proto b/proto-google-cloud-retail-v2/src/main/proto/google/cloud/retail/v2/product.proto
new file mode 100644
index 00000000..0d2cece6
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/proto/google/cloud/retail/v2/product.proto
@@ -0,0 +1,283 @@
+// Copyright 2020 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+syntax = "proto3";
+
+package google.cloud.retail.v2;
+
+import "google/api/annotations.proto";
+import "google/api/field_behavior.proto";
+import "google/api/resource.proto";
+import "google/cloud/retail/v2/common.proto";
+import "google/protobuf/field_mask.proto";
+import "google/protobuf/timestamp.proto";
+import "google/protobuf/wrappers.proto";
+
+option csharp_namespace = "Google.Cloud.Retail.V2";
+option go_package = "google.golang.org/genproto/googleapis/cloud/retail/v2;retail";
+option java_multiple_files = true;
+option java_outer_classname = "ProductProto";
+option java_package = "com.google.cloud.retail.v2";
+option objc_class_prefix = "RETAIL";
+option php_namespace = "Google\\Cloud\\Retail\\V2";
+option ruby_package = "Google::Cloud::Retail::V2";
+option (google.api.resource_definition) = {
+  type: "retail.googleapis.com/Branch"
+  pattern: "projects/{project}/locations/{location}/catalogs/{catalog}/branches/{branch}"
+};
+
+// Product captures all metadata information of items to be recommended or
+// searched.
+message Product {
+  option (google.api.resource) = {
+    type: "retail.googleapis.com/Product"
+    pattern: "projects/{project}/locations/{location}/catalogs/{catalog}/branches/{branch}/products/{product}"
+  };
+
+  // The type of this product.
+  enum Type {
+    // Default value. Default to
+    // [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY] if unset.
+    TYPE_UNSPECIFIED = 0;
+
+    // The primary type.
+    //
+    // As the primary unit for predicting, indexing and search serving, a
+    // [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
+    // [Product][google.cloud.retail.v2.Product] is grouped with multiple
+    // [Type.VARIANT][google.cloud.retail.v2.Product.Type.VARIANT]
+    // [Product][google.cloud.retail.v2.Product]s.
+    PRIMARY = 1;
+
+    // The variant type.
+    //
+    // [Type.VARIANT][google.cloud.retail.v2.Product.Type.VARIANT]
+    // [Product][google.cloud.retail.v2.Product]s usually share some common
+    // attributes on the same
+    // [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
+    // [Product][google.cloud.retail.v2.Product]s, but they have variant
+    // attributes like different colors, sizes and prices, etc.
+    VARIANT = 2;
+
+    // The collection type. Collection products are bundled
+    // [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
+    // [Product][google.cloud.retail.v2.Product]s or
+    // [Type.VARIANT][google.cloud.retail.v2.Product.Type.VARIANT]
+    // [Product][google.cloud.retail.v2.Product]s that are sold together, such
+    // as a jewelry set with necklaces, earrings and rings, etc.
+    COLLECTION = 3;
+  }
+
+  // Product availability. If this field is unspecified, the product is
+  // assumed to be in stock.
+  enum Availability {
+    // Default product availability. Default to
+    // [Availability.IN_STOCK][google.cloud.retail.v2.Product.Availability.IN_STOCK]
+    // if unset.
+    AVAILABILITY_UNSPECIFIED = 0;
+
+    // Product in stock.
+    IN_STOCK = 1;
+
+    // Product out of stock.
+    OUT_OF_STOCK = 2;
+
+    // Product that is in pre-order state.
+    PREORDER = 3;
+
+    // Product that is back-ordered (i.e. temporarily out of stock).
+    BACKORDER = 4;
+  }
+
+  // Immutable. Full resource name of the product, such as
+  // "projects/*/locations/global/catalogs/default_catalog/branches/default_branch/products/product_id".
+  //
+  // The branch ID must be "default_branch".
+  string name = 1 [(google.api.field_behavior) = IMMUTABLE];
+
+  // Immutable. [Product][google.cloud.retail.v2.Product] identifier, which is
+  // the final component of [name][google.cloud.retail.v2.Product.name]. For
+  // example, this field is "id_1", if
+  // [name][google.cloud.retail.v2.Product.name] is
+  // "projects/*/locations/global/catalogs/default_catalog/branches/default_branch/products/id_1".
+  //
+  // This field must be a UTF-8 encoded string with a length limit of 128
+  // characters. Otherwise, an INVALID_ARGUMENT error is returned.
+  //
+  // Google Merchant Center property
+  // [id](https://support.google.com/merchants/answer/6324405). Schema.org
+  // Property [Product.sku](https://schema.org/sku).
+  string id = 2 [(google.api.field_behavior) = IMMUTABLE];
+
+  // Immutable. The type of the product. This field is output-only.
+  Type type = 3 [(google.api.field_behavior) = IMMUTABLE];
+
+  // Variant group identifier. Must be an
+  // [id][google.cloud.retail.v2.Product.id], with the same parent branch with
+  // this product. Otherwise, an error is thrown.
+  //
+  // For [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
+  // [Product][google.cloud.retail.v2.Product]s, this field can only be empty or
+  // set to the same value as [id][google.cloud.retail.v2.Product.id].
+  //
+  // For VARIANT [Product][google.cloud.retail.v2.Product]s, this field cannot
+  // be empty. A maximum of 2,000 products are allowed to share the same
+  // [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
+  // [Product][google.cloud.retail.v2.Product]. Otherwise, an INVALID_ARGUMENT
+  // error is returned.
+  //
+  // Google Merchant Center Property
+  // [item_group_id](https://support.google.com/merchants/answer/6324507).
+  // Schema.org Property
+  // [Product.inProductGroupWithID](https://schema.org/inProductGroupWithID).
+  //
+  // This field must be enabled before it can be used. [Learn
+  // more](/recommendations-ai/docs/catalog#item-group-id).
+  string primary_product_id = 4;
+
+  // Product categories. This field is repeated for supporting one product
+  // belonging to several parallel categories. Strongly recommended using the
+  // full path for better search / recommendation quality.
+  //
+  //
+  // To represent full path of category, use '>' sign to separate different
+  // hierarchies. If '>' is part of the category name, please replace it with
+  // other character(s).
+  //
+  // For example, if a shoes product belongs to both
+  // ["Shoes & Accessories" -> "Shoes"] and
+  // ["Sports & Fitness" -> "Athletic Clothing" -> "Shoes"], it could be
+  // represented as:
+  //
+  //      "categories": [
+  //        "Shoes & Accessories > Shoes",
+  //        "Sports & Fitness > Athletic Clothing > Shoes"
+  //      ]
+  //
+  // Must be set for [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
+  // [Product][google.cloud.retail.v2.Product] otherwise an INVALID_ARGUMENT
+  // error is returned.
+  //
+  // At most 250 values are allowed per
+  // [Product][google.cloud.retail.v2.Product]. Empty values are not allowed.
+  // Each value must be a UTF-8 encoded string with a length limit of 5,000
+  // characters. Otherwise, an INVALID_ARGUMENT error is returned.
+  //
+  // Google Merchant Center property
+  // [google_product_category][mc_google_product_category]. Schema.org property
+  // [Product.category] (https://schema.org/category).
+  //
+  // [mc_google_product_category]:
+  // https://support.google.com/merchants/answer/6324436
+  repeated string categories = 7;
+
+  // Required. Product title.
+  //
+  // This field must be a UTF-8 encoded string with a length limit of 128
+  // characters. Otherwise, an INVALID_ARGUMENT error is returned.
+  //
+  // Google Merchant Center property
+  // [title](https://support.google.com/merchants/answer/6324415). Schema.org
+  // property [Product.name](https://schema.org/name).
+  string title = 8 [(google.api.field_behavior) = REQUIRED];
+
+  // Product description.
+  //
+  // This field must be a UTF-8 encoded string with a length limit of 5,000
+  // characters. Otherwise, an INVALID_ARGUMENT error is returned.
+  //
+  // Google Merchant Center property
+  // [description](https://support.google.com/merchants/answer/6324468).
+  // schema.org property [Product.description](https://schema.org/description).
+  string description = 10;
+
+  // Highly encouraged. Extra product attributes to be included. For example,
+  // for products, this could include the store name, vendor, style, color, etc.
+  // These are very strong signals for recommendation model, thus we highly
+  // recommend providing the attributes here.
+  //
+  // Features that can take on one of a limited number of possible values. Two
+  // types of features can be set are:
+  //
+  // Textual features. some examples would be the brand/maker of a product, or
+  // country of a customer. Numerical features. Some examples would be the
+  // height/weight of a product, or age of a customer.
+  //
+  // For example: `{ "vendor": {"text": ["vendor123", "vendor456"]},
+  // "lengths_cm": {"numbers":[2.3, 15.4]}, "heights_cm": {"numbers":[8.1, 6.4]}
+  // }`.
+  //
+  // A maximum of 150 attributes are allowed. Otherwise, an INVALID_ARGUMENT
+  // error is returned.
+  //
+  // The key must be a UTF-8 encoded string with a length limit of 5,000
+  // characters. Otherwise, an INVALID_ARGUMENT error is returned.
+  map<string, CustomAttribute> attributes = 12;
+
+  // Custom tags associated with the product.
+  //
+  // At most 250 values are allowed per
+  // [Product][google.cloud.retail.v2.Product]. This value must be a UTF-8
+  // encoded string with a length limit of 1,000 characters. Otherwise, an
+  // INVALID_ARGUMENT error is returned.
+  //
+  // This tag can be used for filtering recommendation results by passing the
+  // tag as part of the
+  // [PredictRequest.filter][google.cloud.retail.v2.PredictRequest.filter].
+  //
+  // Google Merchant Center property
+  // [custom_label_0–4](https://support.google.com/merchants/answer/6324473).
+  repeated string tags = 13;
+
+  // Product price and cost information.
+  //
+  // Google Merchant Center property
+  // [price](https://support.google.com/merchants/answer/6324371).
+  PriceInfo price_info = 14;
+
+  // The timestamp when this [Product][google.cloud.retail.v2.Product] becomes
+  // available recommendation and search.
+  google.protobuf.Timestamp available_time = 18;
+
+  // The online availability of the [Product][google.cloud.retail.v2.Product].
+  // Default to
+  // [Availability.IN_STOCK][google.cloud.retail.v2.Product.Availability.IN_STOCK].
+  //
+  // Google Merchant Center Property
+  // [availability](https://support.google.com/merchants/answer/6324448).
+  // Schema.org Property [Offer.availability](https://schema.org/availability).
+  Availability availability = 19;
+
+  // The available quantity of the item.
+  google.protobuf.Int32Value available_quantity = 20;
+
+  // Canonical URL directly linking to the product detail page.
+  //
+  // This field must be a UTF-8 encoded string with a length limit of 5,000
+  // characters. Otherwise, an INVALID_ARGUMENT error is returned.
+  //
+  // Google Merchant Center property
+  // [link](https://support.google.com/merchants/answer/6324416). Schema.org
+  // property [Offer.url](https://schema.org/url).
+  string uri = 22;
+
+  // Product images for the product.
+  //
+  // A maximum of 300 images are allowed.
+  //
+  // Google Merchant Center property
+  // [image_link](https://support.google.com/merchants/answer/6324350).
+  // Schema.org property [Product.image](https://schema.org/image).
+  repeated Image images = 23;
+}
diff --git a/proto-google-cloud-retail-v2/src/main/proto/google/cloud/retail/v2/product_service.proto b/proto-google-cloud-retail-v2/src/main/proto/google/cloud/retail/v2/product_service.proto
new file mode 100644
index 00000000..2c659064
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/proto/google/cloud/retail/v2/product_service.proto
@@ -0,0 +1,186 @@
+// Copyright 2020 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+syntax = "proto3";
+
+package google.cloud.retail.v2;
+
+import "google/api/annotations.proto";
+import "google/api/client.proto";
+import "google/api/field_behavior.proto";
+import "google/api/resource.proto";
+import "google/cloud/retail/v2/import_config.proto";
+import "google/cloud/retail/v2/product.proto";
+import "google/cloud/retail/v2/purge_config.proto";
+import "google/longrunning/operations.proto";
+import "google/protobuf/empty.proto";
+import "google/protobuf/field_mask.proto";
+
+option csharp_namespace = "Google.Cloud.Retail.V2";
+option go_package = "google.golang.org/genproto/googleapis/cloud/retail/v2;retail";
+option java_multiple_files = true;
+option java_outer_classname = "ProductServiceProto";
+option java_package = "com.google.cloud.retail.v2";
+option objc_class_prefix = "RETAIL";
+option php_namespace = "Google\\Cloud\\Retail\\V2";
+option ruby_package = "Google::Cloud::Retail::V2";
+
+// Service for ingesting [Product][google.cloud.retail.v2.Product] information
+// of the customer's website.
+service ProductService {
+  option (google.api.default_host) = "retail.googleapis.com";
+  option (google.api.oauth_scopes) =
+      "https://www.googleapis.com/auth/cloud-platform";
+
+  // Creates a [Product][google.cloud.retail.v2.Product].
+  rpc CreateProduct(CreateProductRequest) returns (Product) {
+    option (google.api.http) = {
+      post: "/v2/{parent=projects/*/locations/*/catalogs/*/branches/*}/products"
+      body: "product"
+    };
+    option (google.api.method_signature) = "parent,product,product_id";
+  }
+
+  // Gets a [Product][google.cloud.retail.v2.Product].
+  rpc GetProduct(GetProductRequest) returns (Product) {
+    option (google.api.http) = {
+      get: "/v2/{name=projects/*/locations/*/catalogs/*/branches/*/products/**}"
+    };
+    option (google.api.method_signature) = "name";
+  }
+
+  // Updates a [Product][google.cloud.retail.v2.Product].
+  rpc UpdateProduct(UpdateProductRequest) returns (Product) {
+    option (google.api.http) = {
+      patch: "/v2/{product.name=projects/*/locations/*/catalogs/*/branches/*/products/**}"
+      body: "product"
+    };
+    option (google.api.method_signature) = "product,update_mask";
+  }
+
+  // Deletes a [Product][google.cloud.retail.v2.Product].
+  rpc DeleteProduct(DeleteProductRequest) returns (google.protobuf.Empty) {
+    option (google.api.http) = {
+      delete: "/v2/{name=projects/*/locations/*/catalogs/*/branches/*/products/**}"
+    };
+    option (google.api.method_signature) = "name";
+  }
+
+  // Bulk import of multiple [Product][google.cloud.retail.v2.Product]s.
+  //
+  // Request processing may be synchronous. No partial updating is supported.
+  // Non-existing items are created.
+  //
+  // Note that it is possible for a subset of the
+  // [Product][google.cloud.retail.v2.Product]s to be successfully updated.
+  rpc ImportProducts(ImportProductsRequest)
+      returns (google.longrunning.Operation) {
+    option (google.api.http) = {
+      post: "/v2/{parent=projects/*/locations/*/catalogs/*/branches/*}/products:import"
+      body: "*"
+    };
+    option (google.longrunning.operation_info) = {
+      response_type: "google.cloud.retail.v2.ImportProductsResponse"
+      metadata_type: "google.cloud.retail.v2.ImportMetadata"
+    };
+  }
+}
+
+// Request message for [CreateProduct][] method.
+message CreateProductRequest {
+  // Required. The parent catalog resource name, such as
+  // "projects/*/locations/global/catalogs/default_catalog/branches/default_branch".
+  string parent = 1 [
+    (google.api.field_behavior) = REQUIRED,
+    (google.api.resource_reference) = { type: "retail.googleapis.com/Branch" }
+  ];
+
+  // Required. The [Product][google.cloud.retail.v2.Product] to create.
+  Product product = 2 [(google.api.field_behavior) = REQUIRED];
+
+  // Required. The ID to use for the [Product][google.cloud.retail.v2.Product],
+  // which will become the final component of the
+  // [Product.name][google.cloud.retail.v2.Product.name].
+  //
+  // If the caller does not have permission to create the
+  // [Product][google.cloud.retail.v2.Product], regardless of whether or not it
+  // exists, a PERMISSION_DENIED error is returned.
+  //
+  // This field must be unique among all
+  // [Product][google.cloud.retail.v2.Product]s with the same
+  // [parent][google.cloud.retail.v2.CreateProductRequest.parent]. Otherwise, an
+  // ALREADY_EXISTS error is returned.
+  //
+  // This field must be a UTF-8 encoded string with a length limit of 128
+  // characters. Otherwise, an INVALID_ARGUMENT error is returned.
+  string product_id = 3 [(google.api.field_behavior) = REQUIRED];
+}
+
+// Request message for [GetProduct][] method.
+message GetProductRequest {
+  // Required. Full resource name of [Product][google.cloud.retail.v2.Product],
+  // such as
+  // "projects/*/locations/global/catalogs/default_catalog/branches/default_branch/products/some_product_id".
+  //
+  // If the caller does not have permission to access the
+  // [Product][google.cloud.retail.v2.Product], regardless of whether or not it
+  // exists, a PERMISSION_DENIED error is returned.
+  //
+  // If the requested [Product][google.cloud.retail.v2.Product] does not exist,
+  // a NOT_FOUND error is returned.
+  string name = 1 [
+    (google.api.field_behavior) = REQUIRED,
+    (google.api.resource_reference) = { type: "retail.googleapis.com/Product" }
+  ];
+}
+
+// Request message for [UpdateProduct][] method.
+message UpdateProductRequest {
+  // Required. The product to update/create.
+  //
+  // If the caller does not have permission to update the
+  // [Product][google.cloud.retail.v2.Product], regardless of whether or not it
+  // exists, a PERMISSION_DENIED error is returned.
+  //
+  // If the [Product][google.cloud.retail.v2.Product] to update does not exist,
+  // a NOT_FOUND error is returned.
+  Product product = 1 [(google.api.field_behavior) = REQUIRED];
+
+  // Indicates which fields in the provided
+  // [Product][google.cloud.retail.v2.Product] to update. The immutable and
+  // output only fields are NOT supported. If not set, all supported fields (the
+  // fields that are neither immutable nor output only) are updated.
+  //
+  // If an unsupported or unknown field is provided, an INVALID_ARGUMENT error
+  // is returned.
+  google.protobuf.FieldMask update_mask = 2;
+}
+
+// Request message for [DeleteProduct][] method.
+message DeleteProductRequest {
+  // Required. Full resource name of [Product][google.cloud.retail.v2.Product],
+  // such as
+  // "projects/*/locations/global/catalogs/default_catalog/branches/default_branch/products/some_product_id".
+  //
+  // If the caller does not have permission to delete the
+  // [Product][google.cloud.retail.v2.Product], regardless of whether or not it
+  // exists, a PERMISSION_DENIED error is returned.
+  //
+  // If the [Product][google.cloud.retail.v2.Product] to delete does not exist,
+  // a NOT_FOUND error is returned.
+  string name = 1 [
+    (google.api.field_behavior) = REQUIRED,
+    (google.api.resource_reference) = { type: "retail.googleapis.com/Product" }
+  ];
+}
diff --git a/proto-google-cloud-retail-v2/src/main/proto/google/cloud/retail/v2/purge_config.proto b/proto-google-cloud-retail-v2/src/main/proto/google/cloud/retail/v2/purge_config.proto
new file mode 100644
index 00000000..d9cf6b82
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/proto/google/cloud/retail/v2/purge_config.proto
@@ -0,0 +1,79 @@
+// Copyright 2020 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+syntax = "proto3";
+
+package google.cloud.retail.v2;
+
+import "google/api/annotations.proto";
+import "google/api/field_behavior.proto";
+
+option csharp_namespace = "Google.Cloud.Retail.V2";
+option go_package = "google.golang.org/genproto/googleapis/cloud/retail/v2;retail";
+option java_multiple_files = true;
+option java_outer_classname = "PurgeConfigProto";
+option java_package = "com.google.cloud.retail.v2";
+option objc_class_prefix = "RETAIL";
+option php_namespace = "Google\\Cloud\\Retail\\V2";
+option ruby_package = "Google::Cloud::Retail::V2";
+
+// Metadata related to the progress of the Purge operation.
+// This will be returned by the google.longrunning.Operation.metadata field.
+message PurgeMetadata {}
+
+// Request message for PurgeUserEvents method.
+message PurgeUserEventsRequest {
+  // Required. The resource name of the catalog under which the events are
+  // created. The format is
+  // "projects/${projectId}/locations/global/catalogs/${catalogId}"
+  string parent = 1 [(google.api.field_behavior) = REQUIRED];
+
+  // Required. The filter string to specify the events to be deleted with a
+  // length limit of 5,000 characters. Empty string filter is not allowed. The
+  // eligible fields for filtering are:
+  //
+  // * `eventType`: Double quoted
+  // [UserEvent.event_type][google.cloud.retail.v2.UserEvent.event_type] string.
+  // * `eventTime`: in ISO 8601 "zulu" format.
+  // * `visitorId`: Double quoted string. Specifying this will delete all
+  //   events associated with a visitor.
+  // * `userId`: Double quoted string. Specifying this will delete all events
+  //   associated with a user.
+  //
+  // Examples:
+  //
+  // * Deleting all events in a time range:
+  //   `eventTime > "2012-04-23T18:25:43.511Z"
+  //   eventTime < "2012-04-23T18:30:43.511Z"`
+  // * Deleting specific eventType in time range:
+  //   `eventTime > "2012-04-23T18:25:43.511Z" eventType = "detail-page-view"`
+  // * Deleting all events for a specific visitor:
+  //   `visitorId = "visitor1024"`
+  //
+  // The filtering fields are assumed to have an implicit AND.
+  string filter = 2 [(google.api.field_behavior) = REQUIRED];
+
+  // Actually perform the purge.
+  // If `force` is set to false, the method will return the expected purge count
+  // without deleting any user events.
+  bool force = 3;
+}
+
+// Response of the PurgeUserEventsRequest. If the long running operation is
+// successfully done, then this message is returned by the
+// google.longrunning.Operations.response field.
+message PurgeUserEventsResponse {
+  // The total count of events purged as a result of the operation.
+  int64 purged_events_count = 1;
+}
diff --git a/proto-google-cloud-retail-v2/src/main/proto/google/cloud/retail/v2/user_event.proto b/proto-google-cloud-retail-v2/src/main/proto/google/cloud/retail/v2/user_event.proto
new file mode 100644
index 00000000..ca7083e5
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/proto/google/cloud/retail/v2/user_event.proto
@@ -0,0 +1,227 @@
+// Copyright 2020 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+syntax = "proto3";
+
+package google.cloud.retail.v2;
+
+import "google/api/annotations.proto";
+import "google/api/field_behavior.proto";
+import "google/cloud/retail/v2/common.proto";
+import "google/cloud/retail/v2/product.proto";
+import "google/protobuf/timestamp.proto";
+import "google/protobuf/wrappers.proto";
+
+option csharp_namespace = "Google.Cloud.Retail.V2";
+option go_package = "google.golang.org/genproto/googleapis/cloud/retail/v2;retail";
+option java_multiple_files = true;
+option java_outer_classname = "UserEventProto";
+option java_package = "com.google.cloud.retail.v2";
+option objc_class_prefix = "RETAIL";
+option php_namespace = "Google\\Cloud\\Retail\\V2";
+option ruby_package = "Google::Cloud::Retail::V2";
+
+// UserEvent captures all metadata information Retail API needs to know about
+// how end users interact with customers' website.
+message UserEvent {
+  // Required. User event type. Allowed values are:
+  //
+  // * `add-to-cart`: Products being added to cart.
+  // * `category-page-view`: Special pages such as sale or promotion pages
+  //   viewed.
+  // * `detail-page-view`: Products detail page viewed.
+  // * `home-page-view`: Homepage viewed.
+  // * `purchase-complete`: User finishing a purchase.
+  // * `search`: Product search.
+  // * `shopping-cart-page-view`: User viewing a shopping cart.
+  string event_type = 1 [(google.api.field_behavior) = REQUIRED];
+
+  // Required. A unique identifier for tracking visitors.
+  //
+  // For example, this could be implemented with an HTTP cookie, which should be
+  // able to uniquely identify a visitor on a single device. This unique
+  // identifier should not change if the visitor log in/out of the website.
+  //
+  // The field must be a UTF-8 encoded string with a length limit of 128
+  // characters. Otherwise, an INVALID_ARGUMENT error is returned.
+  string visitor_id = 2 [(google.api.field_behavior) = REQUIRED];
+
+  // Only required for
+  // [UserEventService.ImportUserEvents][google.cloud.retail.v2.UserEventService.ImportUserEvents]
+  // method. Timestamp of when the user event happened.
+  google.protobuf.Timestamp event_time = 3;
+
+  // A list of identifiers for the independent experiment groups this user event
+  // belongs to. This is used to distinguish between user events associated with
+  // different experiment setups (e.g. using Retail API, using different
+  // recommendation models).
+  repeated string experiment_ids = 4;
+
+  // Highly recommended for user events that are the result of
+  // [PredictionService.Predict][google.cloud.retail.v2.PredictionService.Predict].
+  // This field enables accurate attribution of recommendation model
+  // performance.
+  //
+  // The value must be a valid
+  // [PredictResponse.attribution_token][google.cloud.retail.v2.PredictResponse.attribution_token]
+  // for user events that are the result of
+  // [PredictionService.Predict][google.cloud.retail.v2.PredictionService.Predict].
+  //
+  // This token enables us to accurately attribute page view or purchase back to
+  // the event and the particular predict response containing this
+  // clicked/purchased product. If user clicks on product K in the
+  // recommendation results, pass
+  // [PredictResponse.attribution_token][google.cloud.retail.v2.PredictResponse.attribution_token]
+  // as a URL parameter to product K's page. When recording events on product
+  // K's page, log the
+  // [PredictResponse.attribution_token][google.cloud.retail.v2.PredictResponse.attribution_token]
+  // to this field.
+  string attribution_token = 5;
+
+  // The main product details related to the event.
+  //
+  // This field is required for the following event types:
+  //
+  // * `add-to-cart`
+  // * `detail-page-view`
+  // * `purchase-complete`
+  //
+  // In a `search` event, this field represents the products returned to the end
+  // user on the current page (the end user may have not finished broswing the
+  // whole page yet). When a new page is returned to the end user, after
+  // pagination/filtering/ordering even for the same query, a new `search` event
+  // with different
+  // [product_details][google.cloud.retail.v2.UserEvent.product_details] is
+  // desired. The end user may have not finished broswing the whole page yet.
+  repeated ProductDetail product_details = 6;
+
+  // Extra user event features to include in the recommendation model.
+  //
+  // The key must be a UTF-8 encoded string with a length limit of 5,000
+  // characters. Otherwise, an INVALID_ARGUMENT error is returned.
+  //
+  // For product recommendation, an example of extra user information is
+  // traffic_channel, i.e. how user arrives at the site. Users can arrive
+  // at the site by coming to the site directly, or coming through Google
+  // search, and etc.
+  map<string, CustomAttribute> attributes = 7;
+
+  // The id or name of the associated shopping cart. This id is used
+  // to associate multiple items added or present in the cart before purchase.
+  //
+  // This can only be set for `add-to-cart`, `purchase-complete`, or
+  // `shopping-cart-page-view` events.
+  string cart_id = 8;
+
+  // A transaction represents the entire purchase transaction.
+  //
+  // Required for `purchase-complete` events. Other event types should not set
+  // this field. Otherwise, an INVALID_ARGUMENT error is returned.
+  PurchaseTransaction purchase_transaction = 9;
+
+  // The user's search query.
+  //
+  // The value must be a UTF-8 encoded string with a length limit of 5,000
+  // characters. Otherwise, an INVALID_ARGUMENT error is returned.
+  //
+  // Required for `search` events. Other event types should not set this field.
+  // Otherwise, an INVALID_ARGUMENT error is returned.
+  string search_query = 10;
+
+  // The categories associated with a category page.
+  //
+  // To represent full path of category, use '>' sign to separate different
+  // hierarchies. If '>' is part of the category name, please replace it with
+  // other character(s).
+  //
+  // Category pages include special pages such as sales or promotions. For
+  // instance, a special sale page may have the category hierarchy:
+  // "pageCategories" : ["Sales > 2017 Black Friday Deals"].
+  //
+  // Required for `category-page-view` events. Other event types should not set
+  // this field. Otherwise, an INVALID_ARGUMENT error is returned.
+  repeated string page_categories = 11;
+
+  // User information.
+  UserInfo user_info = 12;
+
+  // Complete URL (window.location.href) of the user's current page.
+  //
+  // When using the client side event reporting with JavaScript pixel and Google
+  // Tag Manager, this value is filled in automatically. Maximum length 5,000
+  // characters.
+  string uri = 13;
+
+  // The referrer URL of the current page.
+  //
+  // When using the client side event reporting with JavaScript pixel and Google
+  // Tag Manager, this value is filled in automatically.
+  string referrer_uri = 14;
+
+  // A unique id of a web page view.
+  //
+  // This should be kept the same for all user events triggered from the same
+  // pageview. For example, an item detail page view could trigger multiple
+  // events as the user is browsing the page. The `pageViewId` property should
+  // be kept the same for all these events so that they can be grouped together
+  // properly.
+  //
+  // When using the client side event reporting with JavaScript pixel and Google
+  // Tag Manager, this value is filled in automatically.
+  string page_view_id = 15;
+}
+
+// Detailed product information associated with a user event.
+message ProductDetail {
+  // Required. [Product][google.cloud.retail.v2.Product] information.
+  //
+  // Only [Product.id][google.cloud.retail.v2.Product.id] field is used when
+  // ingesting an event, all other product fields are ignored as we will look
+  // them up from the catalog.
+  Product product = 1 [(google.api.field_behavior) = REQUIRED];
+
+  // Quantity of the product associated with the user event.
+  //
+  // For example, this field will be 2 if two products are added to the shopping
+  // cart for `purchase-complete` event. Required for `add-to-cart` and
+  // `purchase-complete` event types.
+  google.protobuf.Int32Value quantity = 2;
+}
+
+// A transaction represents the entire purchase transaction.
+message PurchaseTransaction {
+  // The transaction ID with a length limit of 128 characters.
+  string id = 1;
+
+  // Required. Total non-zero revenue or grand total associated with the
+  // transaction. This value include shipping, tax, or other adjustments to
+  // total revenue that you want to include as part of your revenue
+  // calculations.
+  float revenue = 2 [(google.api.field_behavior) = REQUIRED];
+
+  // All the taxes associated with the transaction.
+  float tax = 3;
+
+  // All the costs associated with the products. These can be manufacturing
+  // costs, shipping expenses not borne by the end user, or any other costs,
+  // such that:
+  //
+  // * Profit = [revenue][google.cloud.retail.v2.PurchaseTransaction.revenue] -
+  // [tax][google.cloud.retail.v2.PurchaseTransaction.tax] -
+  // [cost][google.cloud.retail.v2.PurchaseTransaction.cost]
+  float cost = 4;
+
+  // Required. Currency code. Use three-character ISO-4217 code.
+  string currency_code = 5 [(google.api.field_behavior) = REQUIRED];
+}
diff --git a/proto-google-cloud-retail-v2/src/main/proto/google/cloud/retail/v2/user_event_service.proto b/proto-google-cloud-retail-v2/src/main/proto/google/cloud/retail/v2/user_event_service.proto
new file mode 100644
index 00000000..a73b63e1
--- /dev/null
+++ b/proto-google-cloud-retail-v2/src/main/proto/google/cloud/retail/v2/user_event_service.proto
@@ -0,0 +1,188 @@
+// Copyright 2020 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+syntax = "proto3";
+
+package google.cloud.retail.v2;
+
+import "google/api/annotations.proto";
+import "google/api/client.proto";
+import "google/api/field_behavior.proto";
+import "google/api/httpbody.proto";
+import "google/cloud/retail/v2/import_config.proto";
+import "google/cloud/retail/v2/purge_config.proto";
+import "google/cloud/retail/v2/user_event.proto";
+import "google/longrunning/operations.proto";
+
+option csharp_namespace = "Google.Cloud.Retail.V2";
+option go_package = "google.golang.org/genproto/googleapis/cloud/retail/v2;retail";
+option java_multiple_files = true;
+option java_outer_classname = "UserEventServiceProto";
+option java_package = "com.google.cloud.retail.v2";
+option objc_class_prefix = "RETAIL";
+option php_namespace = "Google\\Cloud\\Retail\\V2";
+option ruby_package = "Google::Cloud::Retail::V2";
+
+// Service for ingesting end user actions on the customer website.
+service UserEventService {
+  option (google.api.default_host) = "retail.googleapis.com";
+  option (google.api.oauth_scopes) =
+      "https://www.googleapis.com/auth/cloud-platform";
+
+  // Writes a single user event.
+  rpc WriteUserEvent(WriteUserEventRequest) returns (UserEvent) {
+    option (google.api.http) = {
+      post: "/v2/{parent=projects/*/locations/*/catalogs/*}/userEvents:write"
+      body: "user_event"
+    };
+  }
+
+  // Writes a single user event from the browser. This uses a GET request to
+  // due to browser restriction of POST-ing to a 3rd party domain.
+  //
+  // This method is used only by the Retail API JavaScript pixel and Google Tag
+  // Manager. Users should not call this method directly.
+  rpc CollectUserEvent(CollectUserEventRequest) returns (google.api.HttpBody) {
+    option (google.api.http) = {
+      get: "/v2/{parent=projects/*/locations/*/catalogs/*}/userEvents:collect"
+    };
+  }
+
+  // Deletes permanently all user events specified by the filter provided.
+  // Depending on the number of events specified by the filter, this operation
+  // could take hours or days to complete. To test a filter, use the list
+  // command first.
+  rpc PurgeUserEvents(PurgeUserEventsRequest)
+      returns (google.longrunning.Operation) {
+    option (google.api.http) = {
+      post: "/v2/{parent=projects/*/locations/*/catalogs/*}/userEvents:purge"
+      body: "*"
+    };
+    option (google.longrunning.operation_info) = {
+      response_type: "google.cloud.retail.v2.PurgeUserEventsResponse"
+      metadata_type: "google.cloud.retail.v2.PurgeMetadata"
+    };
+  }
+
+  // Bulk import of User events. Request processing might be
+  // synchronous. Events that already exist are skipped.
+  // Use this method for backfilling historical user events.
+  //
+  // Operation.response is of type ImportResponse. Note that it is
+  // possible for a subset of the items to be successfully inserted.
+  // Operation.metadata is of type ImportMetadata.
+  rpc ImportUserEvents(ImportUserEventsRequest)
+      returns (google.longrunning.Operation) {
+    option (google.api.http) = {
+      post: "/v2/{parent=projects/*/locations/*/catalogs/*}/userEvents:import"
+      body: "*"
+    };
+    option (google.longrunning.operation_info) = {
+      response_type: "google.cloud.retail.v2.ImportUserEventsResponse"
+      metadata_type: "google.cloud.retail.v2.ImportMetadata"
+    };
+  }
+
+  // Triggers a user event rejoin operation with latest product catalog. Events
+  // will not be annotated with detailed product information if product is
+  // missing from the catalog at the time the user event is ingested, and these
+  // events are stored as unjoined events with a limited usage on training and
+  // serving. This API can be used to trigger a 'join' operation on specified
+  // events with latest version of product catalog. It can also be used to
+  // correct events joined with wrong product catalog.
+  rpc RejoinUserEvents(RejoinUserEventsRequest)
+      returns (google.longrunning.Operation) {
+    option (google.api.http) = {
+      post: "/v2/{parent=projects/*/locations/*/catalogs/*}/userEvents:rejoin"
+      body: "*"
+    };
+    option (google.longrunning.operation_info) = {
+      response_type: "RejoinUserEventsResponse"
+      metadata_type: "RejoinUserEventsMetadata"
+    };
+  }
+}
+
+// Request message for WriteUserEvent method.
+message WriteUserEventRequest {
+  // Required. The parent catalog resource name, such as
+  // "projects/1234/locations/global/catalogs/default_catalog".
+  string parent = 1 [(google.api.field_behavior) = REQUIRED];
+
+  // Required. User event to write.
+  UserEvent user_event = 2 [(google.api.field_behavior) = REQUIRED];
+}
+
+// Request message for CollectUserEvent method.
+message CollectUserEventRequest {
+  // Required. The parent catalog name, such as
+  // "projects/1234/locations/global/catalogs/default_catalog".
+  string parent = 1 [(google.api.field_behavior) = REQUIRED];
+
+  // Required. URL encoded UserEvent proto with a length limit of 2,000,000
+  // characters.
+  string user_event = 2 [(google.api.field_behavior) = REQUIRED];
+
+  // The URL including cgi-parameters but excluding the hash fragment with a
+  // length limit of 5,000 characters. This is often more useful than the
+  // referer URL, because many browsers only send the domain for 3rd party
+  // requests.
+  string uri = 3;
+
+  // The event timestamp in milliseconds. This prevents browser caching of
+  // otherwise identical get requests. The name is abbreviated to reduce the
+  // payload bytes.
+  int64 ets = 4;
+}
+
+// Request message for RejoinUserEvents method.
+message RejoinUserEventsRequest {
+  // The scope of user events to be rejoined with the latest product catalog.
+  // If the rejoining aims at reducing number of unjoined events, set
+  // UserEventRejoinScope to UNJOINED_EVENTS.
+  // If the rejoining aims at correcting product catalog information in joined
+  // events, set UserEventRejoinScope to JOINED_EVENTS.
+  // If all events needs to be rejoined, set UserEventRejoinScope to
+  // USER_EVENT_REJOIN_SCOPE_UNSPECIFIED.
+  enum UserEventRejoinScope {
+    // Rejoin all events with the latest product catalog, including both joined
+    // events and unjoined events.
+    USER_EVENT_REJOIN_SCOPE_UNSPECIFIED = 0;
+
+    // Only rejoin joined events with the latest product catalog.
+    JOINED_EVENTS = 1;
+
+    // Only rejoin unjoined events with the latest product catalog.
+    UNJOINED_EVENTS = 2;
+  }
+
+  // Required. The parent catalog resource name, such as
+  // "projects/1234/locations/global/catalogs/default_catalog".
+  string parent = 1 [(google.api.field_behavior) = REQUIRED];
+
+  // The type of the user event rejoin to define the scope and range of the user
+  // events to be rejoined with the latest product catalog. Defaults to
+  // USER_EVENT_REJOIN_SCOPE_UNSPECIFIED if this field is not set, or set to an
+  // invalid integer value.
+  UserEventRejoinScope user_event_rejoin_scope = 2;
+}
+
+// Response message for RejoinUserEvents method.
+message RejoinUserEventsResponse {
+  // Number of user events that were joined with latest product catalog.
+  int64 rejoined_user_events_count = 1;
+}
+
+// Metadata for RejoinUserEvents method.
+message RejoinUserEventsMetadata {}
diff --git a/renovate.json b/renovate.json
new file mode 100644
index 00000000..96762e4d
--- /dev/null
+++ b/renovate.json
@@ -0,0 +1,73 @@
+{
+  "extends": [
+    ":separateMajorReleases",
+    ":combinePatchMinorReleases",
+    ":ignoreUnstable",
+    ":prImmediately",
+    ":updateNotScheduled",
+    ":automergeDisabled",
+    ":ignoreModulesAndTests",
+    ":maintainLockFilesDisabled",
+    ":autodetectPinVersions"
+  ],
+  "packageRules": [
+    {
+      "packagePatterns": [
+        "^com.google.guava:"
+      ],
+      "versionScheme": "docker"
+    },
+    {
+      "packagePatterns": [
+        "*"
+      ],
+      "semanticCommitType": "deps",
+      "semanticCommitScope": null
+    },
+    {
+      "packagePatterns": [
+        "^org.apache.maven",
+        "^org.jacoco:",
+        "^org.codehaus.mojo:",
+        "^org.sonatype.plugins:",
+        "^com.coveo:",
+        "^com.google.cloud:google-cloud-shared-config"
+      ],
+      "semanticCommitType": "build",
+      "semanticCommitScope": "deps"
+    },
+    {
+      "packagePatterns": [
+        "^com.google.cloud:google-cloud-retail",
+        "^com.google.cloud:libraries-bom",
+        "^com.google.cloud.samples:shared-configuration"
+      ],
+      "semanticCommitType": "chore",
+      "semanticCommitScope": "deps"
+    },
+    {
+      "packagePatterns": [
+        "^junit:junit",
+        "^com.google.truth:truth",
+        "^org.mockito:mockito-core",
+        "^org.objenesis:objenesis"
+      ],
+      "semanticCommitType": "test",
+      "semanticCommitScope": "deps"
+    },
+    {
+      "packagePatterns": [
+        "^com.google.cloud:google-cloud-"
+      ],
+      "ignoreUnstable": false
+    },
+    {
+      "packagePatterns": [
+        "^com.fasterxml.jackson.core"
+      ],
+      "groupName": "jackson dependencies"
+    }
+  ],
+  "semanticCommits": true,
+  "masterIssue": true
+}
diff --git a/samples/install-without-bom/pom.xml b/samples/install-without-bom/pom.xml
new file mode 100644
index 00000000..dc31e463
--- /dev/null
+++ b/samples/install-without-bom/pom.xml
@@ -0,0 +1,84 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <groupId>com.google.cloud</groupId>
+  <artifactId>retail-install-without-bom</artifactId>
+  <packaging>jar</packaging>
+  <name>Google Cloud Retail Install Without Bom</name>
+  <url>https://github.com/googleapis/java-retail</url>
+
+  <!--
+    The parent pom defines common style checks and testing strategies for our samples.
+    Removing or replacing it should not affect the execution of the samples in anyway.
+  -->
+  <parent>
+    <groupId>com.google.cloud.samples</groupId>
+    <artifactId>shared-configuration</artifactId>
+    <version>1.0.12</version>
+  </parent>
+
+  <properties>
+    <maven.compiler.target>1.8</maven.compiler.target>
+    <maven.compiler.source>1.8</maven.compiler.source>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+  </properties>
+
+
+  <dependencies>
+    <!-- [START retail_install_without_bom] -->
+    <dependency>
+      <groupId>com.google.cloud</groupId>
+      <artifactId>google-cloud-retail</artifactId>
+      <version>0.0.0</version>
+    </dependency>
+    <!-- [END retail_install_without_bom] -->
+
+    <dependency>
+      <groupId>junit</groupId>
+      <artifactId>junit</artifactId>
+      <version>4.13</version>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>com.google.truth</groupId>
+      <artifactId>truth</artifactId>
+      <version>1.0.1</version>
+      <scope>test</scope>
+    </dependency>
+  </dependencies>
+
+  <!-- compile and run all snippet tests -->
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.codehaus.mojo</groupId>
+        <artifactId>build-helper-maven-plugin</artifactId>
+        <version>3.1.0</version>
+        <executions>
+          <execution>
+            <id>add-snippets-source</id>
+            <goals>
+              <goal>add-source</goal>
+            </goals>
+            <configuration>
+              <sources>
+                <source>../snippets/src/main/java</source>
+              </sources>
+            </configuration>
+          </execution>
+          <execution>
+            <id>add-snippets-tests</id>
+            <goals>
+              <goal>add-test-source</goal>
+            </goals>
+            <configuration>
+              <sources>
+                <source>../snippets/src/test/java</source>
+              </sources>
+            </configuration>
+          </execution>
+        </executions>
+      </plugin>
+    </plugins>
+  </build>
+</project>
diff --git a/samples/pom.xml b/samples/pom.xml
new file mode 100644
index 00000000..44a373f5
--- /dev/null
+++ b/samples/pom.xml
@@ -0,0 +1,56 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <groupId>com.google.cloud</groupId>
+  <artifactId>google-cloud-retail-samples</artifactId>
+  <version>0.0.1-SNAPSHOT</version><!-- This artifact should not be released -->
+  <packaging>pom</packaging>
+  <name>Google Cloud Retail Samples Parent</name>
+  <url>https://github.com/googleapis/java-retail</url>
+  <description>
+    Java idiomatic client for Google Cloud Platform services.
+  </description>
+
+  <!--
+    The parent pom defines common style checks and testing strategies for our samples.
+    Removing or replacing it should not affect the execution of the samples in anyway.
+  -->
+  <parent>
+    <groupId>com.google.cloud.samples</groupId>
+    <artifactId>shared-configuration</artifactId>
+    <version>1.0.18</version>
+  </parent>
+
+  <properties>
+    <maven.compiler.target>1.8</maven.compiler.target>
+    <maven.compiler.source>1.8</maven.compiler.source>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+  </properties>
+
+  <modules>
+    <module>install-without-bom</module>
+    <module>snapshot</module>
+    <module>snippets</module>
+  </modules>
+
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-deploy-plugin</artifactId>
+        <version>2.8.2</version>
+        <configuration>
+          <skip>true</skip>
+        </configuration>
+      </plugin>
+      <plugin>
+        <groupId>org.sonatype.plugins</groupId>
+        <artifactId>nexus-staging-maven-plugin</artifactId>
+        <version>1.6.8</version>
+        <configuration>
+          <skipNexusStagingDeployMojo>true</skipNexusStagingDeployMojo>
+        </configuration>
+      </plugin>
+    </plugins>
+  </build>
+</project> 
diff --git a/samples/snapshot/pom.xml b/samples/snapshot/pom.xml
new file mode 100644
index 00000000..63e740d2
--- /dev/null
+++ b/samples/snapshot/pom.xml
@@ -0,0 +1,83 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <groupId>com.google.cloud</groupId>
+  <artifactId>retail-snapshot</artifactId>
+  <packaging>jar</packaging>
+  <name>Google Cloud Retail Snapshot Samples</name>
+  <url>https://github.com/googleapis/java-retail</url>
+
+  <!--
+    The parent pom defines common style checks and testing strategies for our samples.
+    Removing or replacing it should not affect the execution of the samples in anyway.
+  -->
+  <parent>
+    <groupId>com.google.cloud.samples</groupId>
+    <artifactId>shared-configuration</artifactId>
+    <version>1.0.12</version>
+  </parent>
+
+  <properties>
+    <maven.compiler.target>1.8</maven.compiler.target>
+    <maven.compiler.source>1.8</maven.compiler.source>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+  </properties>
+
+  <!-- {x-version-update-start::current} -->
+  <dependencies>
+    <dependency>
+      <groupId>com.google.cloud</groupId>
+      <artifactId>google-cloud-retail</artifactId>
+      <version>0.0.0</version>
+    </dependency>
+  <!-- {x-version-update-end} -->
+
+    <dependency>
+      <groupId>junit</groupId>
+      <artifactId>junit</artifactId>
+      <version>4.13</version>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>com.google.truth</groupId>
+      <artifactId>truth</artifactId>
+      <version>1.0.1</version>
+      <scope>test</scope>
+    </dependency>
+  </dependencies>
+
+  <!-- compile and run all snippet tests -->
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.codehaus.mojo</groupId>
+        <artifactId>build-helper-maven-plugin</artifactId>
+        <version>3.1.0</version>
+        <executions>
+          <execution>
+            <id>add-snippets-source</id>
+            <goals>
+              <goal>add-source</goal>
+            </goals>
+            <configuration>
+              <sources>
+                <source>../snippets/src/main/java</source>
+              </sources>
+            </configuration>
+          </execution>
+          <execution>
+            <id>add-snippets-tests</id>
+            <goals>
+              <goal>add-test-source</goal>
+            </goals>
+            <configuration>
+              <sources>
+                <source>../snippets/src/test/java</source>
+              </sources>
+            </configuration>
+          </execution>
+        </executions>
+      </plugin>
+    </plugins>
+  </build>
+</project>
\ No newline at end of file
diff --git a/samples/snippets/pom.xml b/samples/snippets/pom.xml
new file mode 100644
index 00000000..0d132dae
--- /dev/null
+++ b/samples/snippets/pom.xml
@@ -0,0 +1,47 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <groupId>com.google.cloud</groupId>
+  <artifactId>retail-snippets</artifactId>
+  <packaging>jar</packaging>
+  <name>Google Cloud Retail Snippets</name>
+  <url>https://github.com/googleapis/java-retail</url>
+
+  <!--
+    The parent pom defines common style checks and testing strategies for our samples.
+    Removing or replacing it should not affect the execution of the samples in anyway.
+  -->
+  <parent>
+    <groupId>com.google.cloud.samples</groupId>
+    <artifactId>shared-configuration</artifactId>
+    <version>1.0.12</version>
+  </parent>
+
+  <properties>
+    <maven.compiler.target>1.8</maven.compiler.target>
+    <maven.compiler.source>1.8</maven.compiler.source>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+  </properties>
+
+  <dependencies>
+    <!-- TODO: switch to libraries-bom after this artifact is included -->
+    <dependency>
+      <groupId>com.google.cloud</groupId>
+      <artifactId>google-cloud-retail</artifactId>
+      <version>0.0.0</version>
+    </dependency>
+
+    <dependency>
+      <groupId>junit</groupId>
+      <artifactId>junit</artifactId>
+      <version>4.13</version>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>com.google.truth</groupId>
+      <artifactId>truth</artifactId>
+      <version>1.0.1</version>
+      <scope>test</scope>
+    </dependency>
+  </dependencies>
+</project>
diff --git a/synth.metadata b/synth.metadata
new file mode 100644
index 00000000..e2cff5fe
--- /dev/null
+++ b/synth.metadata
@@ -0,0 +1,37 @@
+{
+  "sources": [
+    {
+      "git": {
+        "name": ".",
+        "remote": "sso://devrel/cloud/libraries/java/repo-splitter",
+        "sha": "7e5c8c380dfbdfee028d2fce8dc7a93e5c729192"
+      }
+    },
+    {
+      "git": {
+        "name": "googleapis",
+        "remote": "https://github.com/googleapis/googleapis.git",
+        "sha": "53eb2512a55caabcbad1898225080a2a3dfcb6aa",
+        "internalRef": "346818879"
+      }
+    },
+    {
+      "git": {
+        "name": "synthtool",
+        "remote": "https://github.com/googleapis/synthtool.git",
+        "sha": "352f25621c28d2fa0784984ea0ed5ea697aa1525"
+      }
+    }
+  ],
+  "destinations": [
+    {
+      "client": {
+        "source": "googleapis",
+        "apiName": "retail",
+        "apiVersion": "v2",
+        "language": "java",
+        "generator": "bazel"
+      }
+    }
+  ]
+}
\ No newline at end of file
diff --git a/synth.py b/synth.py
new file mode 100644
index 00000000..43b47374
--- /dev/null
+++ b/synth.py
@@ -0,0 +1,32 @@
+# Copyright 2020 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""This script is used to synthesize generated parts of this library."""
+
+import synthtool as s
+import synthtool.gcp as gcp
+import synthtool.languages.java as java
+
+service = 'retail'
+versions = ['v2']
+
+for version in versions:
+  java.bazel_library(
+      service=service,
+      version=version,
+      proto_path=f'google/cloud/{service}/{version}',
+      bazel_target=f'//google/cloud/{service}/{version}:google-cloud-{service}-{version}-java',
+  )
+
+java.common_templates()
\ No newline at end of file
diff --git a/versions.txt b/versions.txt
new file mode 100644
index 00000000..7789aa3f
--- /dev/null
+++ b/versions.txt
@@ -0,0 +1,6 @@
+# Format:
+# module:released-version:current-version
+
+google-cloud-retail:0.0.0:0.0.1-SNAPSHOT
+proto-google-cloud-retail-v2:0.0.0:0.0.1-SNAPSHOT
+grpc-google-cloud-retail-v2:0.0.0:0.0.1-SNAPSHOT
\ No newline at end of file