public Builder mergeOutputConfig(com.google.cloud.vision.v1.OutputConfig value) {
      if (outputConfigBuilder_ == null) {
        if (((bitField0_ & 0x00000002) != 0)
            && outputConfig_ != null
            && outputConfig_ != com.google.cloud.vision.v1.OutputConfig.getDefaultInstance()) {
          getOutputConfigBuilder().mergeFrom(value);
        } else {
          outputConfig_ = value;
        }
      } else {
        outputConfigBuilder_.mergeFrom(value);
      }
      if (outputConfig_ != null) {
        bitField0_ |= 0x00000002;
        onChanged();
      }
      return this;
    }
<pre>
Required. The desired output location and metadata (e.g. format).
</pre>

<code>
.google.cloud.vision.v1.OutputConfig output_config = 2 [(.google.api.field_behavior) = REQUIRED];
</code>
java-vision/proto-google-cloud-vision-v1/src/main/java/com/google/cloud/vision/v1/AsyncBatchAnnotateImagesRequest.java