private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.translate.v3.GcsOutputDestination,
            com.google.cloud.translate.v3.GcsOutputDestination.Builder,
            com.google.cloud.translate.v3.GcsOutputDestinationOrBuilder>
        getGcsDestinationFieldBuilder() {
      if (gcsDestinationBuilder_ == null) {
        if (!(destinationCase_ == 1)) {
          destination_ = com.google.cloud.translate.v3.GcsOutputDestination.getDefaultInstance();
        }
        gcsDestinationBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.translate.v3.GcsOutputDestination,
                com.google.cloud.translate.v3.GcsOutputDestination.Builder,
                com.google.cloud.translate.v3.GcsOutputDestinationOrBuilder>(
                (com.google.cloud.translate.v3.GcsOutputDestination) destination_,
                getParentForChildren(),
                isClean());
        destination_ = null;
      }
      destinationCase_ = 1;
      onChanged();
      return gcsDestinationBuilder_;
    }
<pre>
Google Cloud Storage destination to write the output.
</pre>

<code>.google.cloud.translation.v3.GcsOutputDestination gcs_destination = 1;</code>
java-translate/proto-google-cloud-translate-v3/src/main/java/com/google/cloud/translate/v3/DatasetOutputConfig.java