       optional :gcs_source, :message, 0, "google.cloud.automl.v0beta0.GcsSource"     end     add_message "google.cloud.automl.v0beta0.OutputConfig" do       oneof :destination do         optional :gcs_destination, :message, 0, "google.cloud.automl.v0beta0.GcsDestination"         optional :bigquery_destination, :message, 0, "google.cloud.automl.v0beta0.BigQueryDestination"       end     end     add_message "google.cloud.automl.v0beta0.BatchPredictOutputConfig" do       oneof :destination do         optional :gcs_destination, :message, 0, "google.cloud.automl.v0beta0.GcsDestination"         optional :bigquery_destination, :message, 0, "google.cloud.automl.v0beta0.BigQueryDestination"       end     end     add_message "google.cloud.automl.v0beta0.ModelExportOutputConfig"