// Right now the TF executor dialect is still needed to build NodeDef.
    module.getContext()
        ->getOrLoadDialect<mlir::tf_executor::TensorFlowExecutorDialect>();
  }

  std::optional<std::string> TranslateInternal();

  // Returns TFLite buffer populated with constant value if the operation is
  // TFLite constant operation. Otherwise, returns an empty buffer. Emits error