fix: add retries import

synth.py

@@ -65,6 +65,24 @@
     "\n\g<0>",
 )
 
+# TODO(busunkim): Remove once https://github.com/googleapis/gapic-generator-python/pull/555 is merged
+s.replace(
+    "google/**/base.py",
+    """from google\.api_core import gapic_v1\s+# type: ignore""",
+    """from google.api_core import gapic_v1  # type: ignore
+from google.api_core import retry as retries  # type: ignore""",
+)
+
+# fix bad indentation
+s.replace(
+    "google/**/*service.py",
+    """(\s+)settings resource.
+\s+If empty all mutable fields will be updated.""",
+    """\g<1>settings resource.
+\g<1>If empty all mutable fields will be updated.""",
+)
+
+
 # ----------------------------------------------------------------------------
 # Add templated files
 # ----------------------------------------------------------------------------