diff --git a/googleapis/cloud/documentai/v1beta2/document_understanding.pb.go b/googleapis/cloud/documentai/v1beta2/document_understanding.pb.go
index 5558872a19..5a68014c8c 100644
--- a/googleapis/cloud/documentai/v1beta2/document_understanding.pb.go
+++ b/googleapis/cloud/documentai/v1beta2/document_understanding.pb.go
@@ -1436,7 +1436,7 @@ var file_google_cloud_documentai_v1beta2_document_understanding_proto_rawDesc =
 	0x52, 0x55, 0x4e, 0x4e, 0x49, 0x4e, 0x47, 0x10, 0x03, 0x12, 0x0d, 0x0a, 0x09, 0x53, 0x55, 0x43,
 	0x43, 0x45, 0x45, 0x44, 0x45, 0x44, 0x10, 0x04, 0x12, 0x0d, 0x0a, 0x09, 0x43, 0x41, 0x4e, 0x43,
 	0x45, 0x4c, 0x4c, 0x45, 0x44, 0x10, 0x05, 0x12, 0x0a, 0x0a, 0x06, 0x46, 0x41, 0x49, 0x4c, 0x45,
-	0x44, 0x10, 0x06, 0x32, 0xa3, 0x05, 0x0a, 0x1c, 0x44, 0x6f, 0x63, 0x75, 0x6d, 0x65, 0x6e, 0x74,
+	0x44, 0x10, 0x06, 0x32, 0xa0, 0x05, 0x0a, 0x1c, 0x44, 0x6f, 0x63, 0x75, 0x6d, 0x65, 0x6e, 0x74,
 	0x55, 0x6e, 0x64, 0x65, 0x72, 0x73, 0x74, 0x61, 0x6e, 0x64, 0x69, 0x6e, 0x67, 0x53, 0x65, 0x72,
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@@ -1473,27 +1473,27 @@ var file_google_cloud_documentai_v1beta2_document_understanding_proto_rawDesc =
 	0x01, 0x2a, 0x5a, 0x33, 0x22, 0x2e, 0x2f, 0x76, 0x31, 0x62, 0x65, 0x74, 0x61, 0x32, 0x2f, 0x7b,
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 }
 
 var (
diff --git a/googleapis/cloud/workflows/type/engine_call.pb.go b/googleapis/cloud/workflows/type/engine_call.pb.go
new file mode 100644
index 0000000000..aa05e72209
--- /dev/null
+++ b/googleapis/cloud/workflows/type/engine_call.pb.go
@@ -0,0 +1,676 @@
+// Copyright 2021 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.
+
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.26.0
+// 	protoc        v3.12.2
+// source: google/cloud/workflows/type/engine_call.proto
+
+package _type
+
+import (
+	reflect "reflect"
+	sync "sync"
+
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	timestamppb "google.golang.org/protobuf/types/known/timestamppb"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+// The state of a function call.
+type EngineCallLog_State int32
+
+const (
+	// Function call state is unspecified or unknown.
+	EngineCallLog_STATE_UNSPECIFIED EngineCallLog_State = 0
+	// Function call is starting.
+	EngineCallLog_BEGUN EngineCallLog_State = 1
+	// Function call has completed successfully.
+	EngineCallLog_SUCCEEDED EngineCallLog_State = 2
+	// Function call did not succeed because an exception was raised.
+	EngineCallLog_EXCEPTION_RAISED EngineCallLog_State = 3
+)
+
+// Enum value maps for EngineCallLog_State.
+var (
+	EngineCallLog_State_name = map[int32]string{
+		0: "STATE_UNSPECIFIED",
+		1: "BEGUN",
+		2: "SUCCEEDED",
+		3: "EXCEPTION_RAISED",
+	}
+	EngineCallLog_State_value = map[string]int32{
+		"STATE_UNSPECIFIED": 0,
+		"BEGUN":             1,
+		"SUCCEEDED":         2,
+		"EXCEPTION_RAISED":  3,
+	}
+)
+
+func (x EngineCallLog_State) Enum() *EngineCallLog_State {
+	p := new(EngineCallLog_State)
+	*p = x
+	return p
+}
+
+func (x EngineCallLog_State) String() string {
+	return protoimpl.X.EnumStringOf(x.Descriptor(), protoreflect.EnumNumber(x))
+}
+
+func (EngineCallLog_State) Descriptor() protoreflect.EnumDescriptor {
+	return file_google_cloud_workflows_type_engine_call_proto_enumTypes[0].Descriptor()
+}
+
+func (EngineCallLog_State) Type() protoreflect.EnumType {
+	return &file_google_cloud_workflows_type_engine_call_proto_enumTypes[0]
+}
+
+func (x EngineCallLog_State) Number() protoreflect.EnumNumber {
+	return protoreflect.EnumNumber(x)
+}
+
+// Deprecated: Use EngineCallLog_State.Descriptor instead.
+func (EngineCallLog_State) EnumDescriptor() ([]byte, []int) {
+	return file_google_cloud_workflows_type_engine_call_proto_rawDescGZIP(), []int{0, 0}
+}
+
+// Logged during a workflow execution if the customer has requested call
+// logging.
+type EngineCallLog struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// The execution ID of the execution where the call occurred.
+	ExecutionId string `protobuf:"bytes,1,opt,name=execution_id,json=executionId,proto3" json:"execution_id,omitempty"`
+	// The point in time when the activity occurred.
+	ActivityTime *timestamppb.Timestamp `protobuf:"bytes,2,opt,name=activity_time,json=activityTime,proto3" json:"activity_time,omitempty"`
+	// The state of the function execution.
+	State EngineCallLog_State `protobuf:"varint,3,opt,name=state,proto3,enum=google.cloud.workflows.type.EngineCallLog_State" json:"state,omitempty"`
+	// The name of the step in which the call took place, truncated if necessary.
+	Step string `protobuf:"bytes,4,opt,name=step,proto3" json:"step,omitempty"`
+	// The name of the target of the call, truncated if necessary.
+	Callee string `protobuf:"bytes,5,opt,name=callee,proto3" json:"callee,omitempty"`
+	// Types that are assignable to Details:
+	//	*EngineCallLog_Begun_
+	//	*EngineCallLog_Succeeded_
+	//	*EngineCallLog_ExceptionRaised_
+	Details isEngineCallLog_Details `protobuf_oneof:"details"`
+}
+
+func (x *EngineCallLog) Reset() {
+	*x = EngineCallLog{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_google_cloud_workflows_type_engine_call_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *EngineCallLog) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*EngineCallLog) ProtoMessage() {}
+
+func (x *EngineCallLog) ProtoReflect() protoreflect.Message {
+	mi := &file_google_cloud_workflows_type_engine_call_proto_msgTypes[0]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use EngineCallLog.ProtoReflect.Descriptor instead.
+func (*EngineCallLog) Descriptor() ([]byte, []int) {
+	return file_google_cloud_workflows_type_engine_call_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *EngineCallLog) GetExecutionId() string {
+	if x != nil {
+		return x.ExecutionId
+	}
+	return ""
+}
+
+func (x *EngineCallLog) GetActivityTime() *timestamppb.Timestamp {
+	if x != nil {
+		return x.ActivityTime
+	}
+	return nil
+}
+
+func (x *EngineCallLog) GetState() EngineCallLog_State {
+	if x != nil {
+		return x.State
+	}
+	return EngineCallLog_STATE_UNSPECIFIED
+}
+
+func (x *EngineCallLog) GetStep() string {
+	if x != nil {
+		return x.Step
+	}
+	return ""
+}
+
+func (x *EngineCallLog) GetCallee() string {
+	if x != nil {
+		return x.Callee
+	}
+	return ""
+}
+
+func (m *EngineCallLog) GetDetails() isEngineCallLog_Details {
+	if m != nil {
+		return m.Details
+	}
+	return nil
+}
+
+func (x *EngineCallLog) GetBegun() *EngineCallLog_Begun {
+	if x, ok := x.GetDetails().(*EngineCallLog_Begun_); ok {
+		return x.Begun
+	}
+	return nil
+}
+
+func (x *EngineCallLog) GetSucceeded() *EngineCallLog_Succeeded {
+	if x, ok := x.GetDetails().(*EngineCallLog_Succeeded_); ok {
+		return x.Succeeded
+	}
+	return nil
+}
+
+func (x *EngineCallLog) GetExceptionRaised() *EngineCallLog_ExceptionRaised {
+	if x, ok := x.GetDetails().(*EngineCallLog_ExceptionRaised_); ok {
+		return x.ExceptionRaised
+	}
+	return nil
+}
+
+type isEngineCallLog_Details interface {
+	isEngineCallLog_Details()
+}
+
+type EngineCallLog_Begun_ struct {
+	// Appears at the start of a call.
+	Begun *EngineCallLog_Begun `protobuf:"bytes,6,opt,name=begun,proto3,oneof"`
+}
+
+type EngineCallLog_Succeeded_ struct {
+	// Appears when a call returns successfully.
+	Succeeded *EngineCallLog_Succeeded `protobuf:"bytes,7,opt,name=succeeded,proto3,oneof"`
+}
+
+type EngineCallLog_ExceptionRaised_ struct {
+	// Appears when a call returns because an exception was raised.
+	ExceptionRaised *EngineCallLog_ExceptionRaised `protobuf:"bytes,8,opt,name=exception_raised,json=exceptionRaised,proto3,oneof"`
+}
+
+func (*EngineCallLog_Begun_) isEngineCallLog_Details() {}
+
+func (*EngineCallLog_Succeeded_) isEngineCallLog_Details() {}
+
+func (*EngineCallLog_ExceptionRaised_) isEngineCallLog_Details() {}
+
+// Information about an argument to a called function.
+type EngineCallLog_CallArg struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// A function argument, serialized to a string. This may be truncated for
+	// size reasons.
+	Argument string `protobuf:"bytes,1,opt,name=argument,proto3" json:"argument,omitempty"`
+}
+
+func (x *EngineCallLog_CallArg) Reset() {
+	*x = EngineCallLog_CallArg{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_google_cloud_workflows_type_engine_call_proto_msgTypes[1]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *EngineCallLog_CallArg) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*EngineCallLog_CallArg) ProtoMessage() {}
+
+func (x *EngineCallLog_CallArg) ProtoReflect() protoreflect.Message {
+	mi := &file_google_cloud_workflows_type_engine_call_proto_msgTypes[1]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use EngineCallLog_CallArg.ProtoReflect.Descriptor instead.
+func (*EngineCallLog_CallArg) Descriptor() ([]byte, []int) {
+	return file_google_cloud_workflows_type_engine_call_proto_rawDescGZIP(), []int{0, 0}
+}
+
+func (x *EngineCallLog_CallArg) GetArgument() string {
+	if x != nil {
+		return x.Argument
+	}
+	return ""
+}
+
+// Information about the start of a call.
+type EngineCallLog_Begun struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// The arguments passed to the function.
+	Args []*EngineCallLog_CallArg `protobuf:"bytes,1,rep,name=args,proto3" json:"args,omitempty"`
+}
+
+func (x *EngineCallLog_Begun) Reset() {
+	*x = EngineCallLog_Begun{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_google_cloud_workflows_type_engine_call_proto_msgTypes[2]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *EngineCallLog_Begun) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*EngineCallLog_Begun) ProtoMessage() {}
+
+func (x *EngineCallLog_Begun) ProtoReflect() protoreflect.Message {
+	mi := &file_google_cloud_workflows_type_engine_call_proto_msgTypes[2]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use EngineCallLog_Begun.ProtoReflect.Descriptor instead.
+func (*EngineCallLog_Begun) Descriptor() ([]byte, []int) {
+	return file_google_cloud_workflows_type_engine_call_proto_rawDescGZIP(), []int{0, 1}
+}
+
+func (x *EngineCallLog_Begun) GetArgs() []*EngineCallLog_CallArg {
+	if x != nil {
+		return x.Args
+	}
+	return nil
+}
+
+// Information about the end of a successful call.
+type EngineCallLog_Succeeded struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// The time when the call started.
+	CallStartTime *timestamppb.Timestamp `protobuf:"bytes,1,opt,name=call_start_time,json=callStartTime,proto3" json:"call_start_time,omitempty"`
+	// The result of the call, if the call succeeded, serialized to a string.
+	// This may be truncated for size reasons.
+	Response string `protobuf:"bytes,2,opt,name=response,proto3" json:"response,omitempty"`
+}
+
+func (x *EngineCallLog_Succeeded) Reset() {
+	*x = EngineCallLog_Succeeded{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_google_cloud_workflows_type_engine_call_proto_msgTypes[3]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *EngineCallLog_Succeeded) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*EngineCallLog_Succeeded) ProtoMessage() {}
+
+func (x *EngineCallLog_Succeeded) ProtoReflect() protoreflect.Message {
+	mi := &file_google_cloud_workflows_type_engine_call_proto_msgTypes[3]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use EngineCallLog_Succeeded.ProtoReflect.Descriptor instead.
+func (*EngineCallLog_Succeeded) Descriptor() ([]byte, []int) {
+	return file_google_cloud_workflows_type_engine_call_proto_rawDescGZIP(), []int{0, 2}
+}
+
+func (x *EngineCallLog_Succeeded) GetCallStartTime() *timestamppb.Timestamp {
+	if x != nil {
+		return x.CallStartTime
+	}
+	return nil
+}
+
+func (x *EngineCallLog_Succeeded) GetResponse() string {
+	if x != nil {
+		return x.Response
+	}
+	return ""
+}
+
+// Information about the end of a failed call.
+type EngineCallLog_ExceptionRaised struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// The time when the call started.
+	CallStartTime *timestamppb.Timestamp `protobuf:"bytes,1,opt,name=call_start_time,json=callStartTime,proto3" json:"call_start_time,omitempty"`
+	// The exception message which terminated the call, truncated if necessary.
+	Exception string `protobuf:"bytes,2,opt,name=exception,proto3" json:"exception,omitempty"`
+	// The name of the step where the failure originates, if known. Truncated
+	// if necessary.
+	Origin string `protobuf:"bytes,3,opt,name=origin,proto3" json:"origin,omitempty"`
+}
+
+func (x *EngineCallLog_ExceptionRaised) Reset() {
+	*x = EngineCallLog_ExceptionRaised{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_google_cloud_workflows_type_engine_call_proto_msgTypes[4]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *EngineCallLog_ExceptionRaised) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*EngineCallLog_ExceptionRaised) ProtoMessage() {}
+
+func (x *EngineCallLog_ExceptionRaised) ProtoReflect() protoreflect.Message {
+	mi := &file_google_cloud_workflows_type_engine_call_proto_msgTypes[4]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use EngineCallLog_ExceptionRaised.ProtoReflect.Descriptor instead.
+func (*EngineCallLog_ExceptionRaised) Descriptor() ([]byte, []int) {
+	return file_google_cloud_workflows_type_engine_call_proto_rawDescGZIP(), []int{0, 3}
+}
+
+func (x *EngineCallLog_ExceptionRaised) GetCallStartTime() *timestamppb.Timestamp {
+	if x != nil {
+		return x.CallStartTime
+	}
+	return nil
+}
+
+func (x *EngineCallLog_ExceptionRaised) GetException() string {
+	if x != nil {
+		return x.Exception
+	}
+	return ""
+}
+
+func (x *EngineCallLog_ExceptionRaised) GetOrigin() string {
+	if x != nil {
+		return x.Origin
+	}
+	return ""
+}
+
+var File_google_cloud_workflows_type_engine_call_proto protoreflect.FileDescriptor
+
+var file_google_cloud_workflows_type_engine_call_proto_rawDesc = []byte{
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+}
+
+var (
+	file_google_cloud_workflows_type_engine_call_proto_rawDescOnce sync.Once
+	file_google_cloud_workflows_type_engine_call_proto_rawDescData = file_google_cloud_workflows_type_engine_call_proto_rawDesc
+)
+
+func file_google_cloud_workflows_type_engine_call_proto_rawDescGZIP() []byte {
+	file_google_cloud_workflows_type_engine_call_proto_rawDescOnce.Do(func() {
+		file_google_cloud_workflows_type_engine_call_proto_rawDescData = protoimpl.X.CompressGZIP(file_google_cloud_workflows_type_engine_call_proto_rawDescData)
+	})
+	return file_google_cloud_workflows_type_engine_call_proto_rawDescData
+}
+
+var file_google_cloud_workflows_type_engine_call_proto_enumTypes = make([]protoimpl.EnumInfo, 1)
+var file_google_cloud_workflows_type_engine_call_proto_msgTypes = make([]protoimpl.MessageInfo, 5)
+var file_google_cloud_workflows_type_engine_call_proto_goTypes = []interface{}{
+	(EngineCallLog_State)(0),              // 0: google.cloud.workflows.type.EngineCallLog.State
+	(*EngineCallLog)(nil),                 // 1: google.cloud.workflows.type.EngineCallLog
+	(*EngineCallLog_CallArg)(nil),         // 2: google.cloud.workflows.type.EngineCallLog.CallArg
+	(*EngineCallLog_Begun)(nil),           // 3: google.cloud.workflows.type.EngineCallLog.Begun
+	(*EngineCallLog_Succeeded)(nil),       // 4: google.cloud.workflows.type.EngineCallLog.Succeeded
+	(*EngineCallLog_ExceptionRaised)(nil), // 5: google.cloud.workflows.type.EngineCallLog.ExceptionRaised
+	(*timestamppb.Timestamp)(nil),         // 6: google.protobuf.Timestamp
+}
+var file_google_cloud_workflows_type_engine_call_proto_depIdxs = []int32{
+	6, // 0: google.cloud.workflows.type.EngineCallLog.activity_time:type_name -> google.protobuf.Timestamp
+	0, // 1: google.cloud.workflows.type.EngineCallLog.state:type_name -> google.cloud.workflows.type.EngineCallLog.State
+	3, // 2: google.cloud.workflows.type.EngineCallLog.begun:type_name -> google.cloud.workflows.type.EngineCallLog.Begun
+	4, // 3: google.cloud.workflows.type.EngineCallLog.succeeded:type_name -> google.cloud.workflows.type.EngineCallLog.Succeeded
+	5, // 4: google.cloud.workflows.type.EngineCallLog.exception_raised:type_name -> google.cloud.workflows.type.EngineCallLog.ExceptionRaised
+	2, // 5: google.cloud.workflows.type.EngineCallLog.Begun.args:type_name -> google.cloud.workflows.type.EngineCallLog.CallArg
+	6, // 6: google.cloud.workflows.type.EngineCallLog.Succeeded.call_start_time:type_name -> google.protobuf.Timestamp
+	6, // 7: google.cloud.workflows.type.EngineCallLog.ExceptionRaised.call_start_time:type_name -> google.protobuf.Timestamp
+	8, // [8:8] is the sub-list for method output_type
+	8, // [8:8] is the sub-list for method input_type
+	8, // [8:8] is the sub-list for extension type_name
+	8, // [8:8] is the sub-list for extension extendee
+	0, // [0:8] is the sub-list for field type_name
+}
+
+func init() { file_google_cloud_workflows_type_engine_call_proto_init() }
+func file_google_cloud_workflows_type_engine_call_proto_init() {
+	if File_google_cloud_workflows_type_engine_call_proto != nil {
+		return
+	}
+	if !protoimpl.UnsafeEnabled {
+		file_google_cloud_workflows_type_engine_call_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*EngineCallLog); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_google_cloud_workflows_type_engine_call_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*EngineCallLog_CallArg); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_google_cloud_workflows_type_engine_call_proto_msgTypes[2].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*EngineCallLog_Begun); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_google_cloud_workflows_type_engine_call_proto_msgTypes[3].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*EngineCallLog_Succeeded); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_google_cloud_workflows_type_engine_call_proto_msgTypes[4].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*EngineCallLog_ExceptionRaised); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+	}
+	file_google_cloud_workflows_type_engine_call_proto_msgTypes[0].OneofWrappers = []interface{}{
+		(*EngineCallLog_Begun_)(nil),
+		(*EngineCallLog_Succeeded_)(nil),
+		(*EngineCallLog_ExceptionRaised_)(nil),
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_google_cloud_workflows_type_engine_call_proto_rawDesc,
+			NumEnums:      1,
+			NumMessages:   5,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_google_cloud_workflows_type_engine_call_proto_goTypes,
+		DependencyIndexes: file_google_cloud_workflows_type_engine_call_proto_depIdxs,
+		EnumInfos:         file_google_cloud_workflows_type_engine_call_proto_enumTypes,
+		MessageInfos:      file_google_cloud_workflows_type_engine_call_proto_msgTypes,
+	}.Build()
+	File_google_cloud_workflows_type_engine_call_proto = out.File
+	file_google_cloud_workflows_type_engine_call_proto_rawDesc = nil
+	file_google_cloud_workflows_type_engine_call_proto_goTypes = nil
+	file_google_cloud_workflows_type_engine_call_proto_depIdxs = nil
+}
diff --git a/regen.txt b/regen.txt
index e9962b4ee4..87f17ac709 100644
--- a/regen.txt
+++ b/regen.txt
@@ -1 +1 @@
-e932524ec49b16571834457aef007406075c3a56
\ No newline at end of file
+c47ff19bccfcd8a8eeb2929821dcc926d95339f1
\ No newline at end of file