private void maybeForceBuilderInitialization() {
      if (com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders) {
        getInputConfigFieldBuilder();
        getFeaturesFieldBuilder();
        getImageContextFieldBuilder();
        getOutputConfigFieldBuilder();
      }
    }
<pre>
An offline file annotation request.
</pre>

Protobuf type {@code google.cloud.vision.v1p3beta1.AsyncAnnotateFileRequest}
java-vision/proto-google-cloud-vision-v1p3beta1/src/main/java/com/google/cloud/vision/v1p3beta1/AsyncAnnotateFileRequest.java