}
    return {};
  };
}

// Returns quantization spec for LSTMs based on their operator properties.
template <typename LstmOp>
std::unique_ptr<quant::OpQuantSpec> GetLstmOpQuantSpec(LstmOp op) {
  operator_property::OpVariant lstm_variant;
  operator_property::OperatorProperty lstm_property;
  if (failed(GetLstmProperty(op, &lstm_variant, &lstm_property))) {
    return nullptr;
  }