private void maybeForceBuilderInitialization() {
      if (com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders) {
        getDocumentInputConfigFieldBuilder();
        getDocumentOutputConfigFieldBuilder();
        getGlossaryConfigFieldBuilder();
      }
    }
<pre>
A document translation request.
</pre>

Protobuf type {@code google.cloud.translation.v3.TranslateDocumentRequest}
java-translate/proto-google-cloud-translate-v3/src/main/java/com/google/cloud/translate/v3/TranslateDocumentRequest.java