private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.translate.v3.BatchDocumentOutputConfig,
            com.google.cloud.translate.v3.BatchDocumentOutputConfig.Builder,
            com.google.cloud.translate.v3.BatchDocumentOutputConfigOrBuilder>
        getOutputConfigFieldBuilder() {
      if (outputConfigBuilder_ == null) {
        outputConfigBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.translate.v3.BatchDocumentOutputConfig,
                com.google.cloud.translate.v3.BatchDocumentOutputConfig.Builder,
                com.google.cloud.translate.v3.BatchDocumentOutputConfigOrBuilder>(
                getOutputConfig(), getParentForChildren(), isClean());
        outputConfig_ = null;
      }
      return outputConfigBuilder_;
    }
<pre>
Required. Output configuration.
If 2 input configs match to the same file (that is, same input path),
we don't generate output for duplicate inputs.
</pre>

<code>
.google.cloud.translation.v3.BatchDocumentOutputConfig output_config = 5 [(.google.api.field_behavior) = REQUIRED];
</code>
java-translate/proto-google-cloud-translate-v3/src/main/java/com/google/cloud/translate/v3/BatchTranslateDocumentRequest.java