Save a QASM file equivalent to the circuit.

        Args:
            file_path: The location of the file where the qasm will be written.
            header: A multi-line string that is placed in a comment at the top
                of the QASM. Defaults to a cirq version specifier.
            precision: Number of digits to use when representing numbers.
            qubit_order: Determines how qubits are ordered in the QASM
                register.

def save_qasm(self,
                  file_path: Union[str, bytes, int],
                  header: Optional[str] = None,
                  precision: int = 10,
                  qubit_order: ops.QubitOrderOrList = ops.QubitOrder.DEFAULT,
                  ) -> None:
        """Save a QASM file equivalent to the circuit.

        Args:
            file_path: The location of the file where the qasm will be written.
            header: A multi-line string that is placed in a comment at the top
                of the QASM. Defaults to a cirq version specifier.
            precision: Number of digits to use when representing numbers.
            qubit_order: Determines how qubits are ordered in the QASM
                register.
        """
        self._to_qasm_output(header, precision, qubit_order).save(file_path)