code: def to_qasm(self,
                  header: Optional[str] = None,
                  precision: int = 10,
                  qubit_order: ops.QubitOrderOrList = ops.QubitOrder.DEFAULT,
                  ) -> str:
          
          return str(self._to_qasm_output(header, precision, qubit_order))
docs: Returns QASM equivalent to the circuit.
  
          Args:
              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.