private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.vision.v1p4beta1.OutputConfig,
            com.google.cloud.vision.v1p4beta1.OutputConfig.Builder,
            com.google.cloud.vision.v1p4beta1.OutputConfigOrBuilder>
        getOutputConfigFieldBuilder() {
      if (outputConfigBuilder_ == null) {
        outputConfigBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.vision.v1p4beta1.OutputConfig,
                com.google.cloud.vision.v1p4beta1.OutputConfig.Builder,
                com.google.cloud.vision.v1p4beta1.OutputConfigOrBuilder>(
                getOutputConfig(), getParentForChildren(), isClean());
        outputConfig_ = null;
      }
      return outputConfigBuilder_;
    }
<pre>
Required. The desired output location and metadata (e.g. format).
</pre>

<code>
.google.cloud.vision.v1p4beta1.OutputConfig output_config = 2 [(.google.api.field_behavior) = REQUIRED];
</code>
java-vision/proto-google-cloud-vision-v1p4beta1/src/main/java/com/google/cloud/vision/v1p4beta1/AsyncBatchAnnotateImagesRequest.java