qiskit/circuit/compositegate.py
def q_if(self, *qregs):
        """Add controls to this gate."""
        self.data = [gate.q_if(qregs) for gate in self.data]
        return self
def q_if(self, *qregs):
        """Add controls to this gate."""
        self.data = [gate.q_if(qregs) for gate in self.data]
        return self
Add controls to this gate.