fixed missing bracket

Author: daniel-sanche

gapic/templates/%namespace/%name_%version/%sub/services/%service/_mixins.py.j2

@@ -3,7 +3,7 @@
     {% if "ListOperations" in api.mixin_api_methods %}
     def list_operations(
         self,
-        request: Optional[Union[operations_pb2.ListOperationsRequest, dict] = None,
+        request: Optional[Union[operations_pb2.ListOperationsRequest, dict]] = None,
         *,
         retry: OptionalRetry = gapic_v1.method.DEFAULT,
         timeout: Union[float, object] = gapic_v1.method.DEFAULT,
@@ -61,7 +61,7 @@
     {% if "GetOperation" in api.mixin_api_methods %}
     def get_operation(
         self,
-        request: Optional[Union[operations_pb2.GetOperationRequest, dict] = None,
+        request: Optional[Union[operations_pb2.GetOperationRequest, dict]] = None,
         *,
         retry: OptionalRetry = gapic_v1.method.DEFAULT,
         timeout: Union[float, object] = gapic_v1.method.DEFAULT,
@@ -118,7 +118,7 @@
     {% if "DeleteOperation" in api.mixin_api_methods %}
     def delete_operation(
         self,
-        request: Optional[Union[operations_pb2.DeleteOperationRequest, dict] = None,
+        request: Optional[Union[operations_pb2.DeleteOperationRequest, dict]] = None,
         *,
         retry: OptionalRetry = gapic_v1.method.DEFAULT,
         timeout: Union[float, object] = gapic_v1.method.DEFAULT,
@@ -171,7 +171,7 @@
     {% if "CancelOperation" in api.mixin_api_methods %}
     def cancel_operation(
         self,
-        request: Optional[Union[operations_pb2.CancelOperationRequest, dict] = None,
+        request: Optional[Union[operations_pb2.CancelOperationRequest, dict]] = None,
         *,
         retry: OptionalRetry = gapic_v1.method.DEFAULT,
         timeout: Union[float, object] = gapic_v1.method.DEFAULT,
@@ -223,7 +223,7 @@
     {% if "WaitOperation" in api.mixin_api_methods %}
     def wait_operation(
         self,
-        request: Optional[Union[operations_pb2.WaitOperationRequest, dict] = None,
+        request: Optional[Union[operations_pb2.WaitOperationRequest, dict]] = None,
         *,
         retry: OptionalRetry = gapic_v1.method.DEFAULT,
         timeout: Union[float, object] = gapic_v1.method.DEFAULT,
@@ -291,7 +291,7 @@
     {% if "SetIamPolicy" in api.mixin_api_methods %}
     def set_iam_policy(
         self,
-        request: Optional[Union[iam_policy_pb2.SetIamPolicyRequest, dict] = None,
+        request: Optional[Union[iam_policy_pb2.SetIamPolicyRequest, dict]] = None,
         *,
         retry: OptionalRetry = gapic_v1.method.DEFAULT,
         timeout: Union[float, object] = gapic_v1.method.DEFAULT,
@@ -414,7 +414,7 @@
     {% if "GetIamPolicy" in api.mixin_api_methods %}
     def get_iam_policy(
         self,
-        request: Optional[Union[iam_policy_pb2.GetIamPolicyRequest, dict] = None,
+        request: Optional[Union[iam_policy_pb2.GetIamPolicyRequest, dict]] = None,
         *,
         retry: OptionalRetry = gapic_v1.method.DEFAULT,
         timeout: Union[float, object] = gapic_v1.method.DEFAULT,
@@ -538,7 +538,7 @@
     {% if "TestIamPermissions" in api.mixin_api_methods %}
     def test_iam_permissions(
         self,
-        request: Optional[Union[iam_policy_pb2.TestIamPermissionsRequest, dict] = None,
+        request: Optional[Union[iam_policy_pb2.TestIamPermissionsRequest, dict]] = None,
         *,
         retry: OptionalRetry = gapic_v1.method.DEFAULT,
         timeout: Union[float, object] = gapic_v1.method.DEFAULT,
@@ -604,7 +604,7 @@
     {% if "GetLocation" in api.mixin_api_methods %}
     def get_location(
         self,
-        request: Optional[Union[locations_pb2.GetLocationRequest, dict] = None,
+        request: Optional[Union[locations_pb2.GetLocationRequest, dict]] = None,
         *,
         retry: OptionalRetry = gapic_v1.method.DEFAULT,
         timeout: Union[float, object] = gapic_v1.method.DEFAULT,
@@ -661,7 +661,7 @@
     {% if "ListLocations" in api.mixin_api_methods %}
     def list_locations(
         self,
-        request: Optional[Union[locations_pb2.ListLocationsRequest, dict] = None,
+        request: Optional[Union[locations_pb2.ListLocationsRequest, dict]] = None,
         *,
         retry: OptionalRetry = gapic_v1.method.DEFAULT,
         timeout: Union[float, object] = gapic_v1.method.DEFAULT,