public OperationCallSettings.Builder<DeleteSourceRequest, Empty, OperationMetadata>
        deleteSourceOperationSettings() {
      return deleteSourceOperationSettings;
    }
Returns the builder for the settings used for calls to deleteSource.
java-vmmigration/google-cloud-vmmigration/src/main/java/com/google/cloud/vmmigration/v1/stub/VmMigrationStubSettings.java