qiskit/quantum_info/operators/channel/quantum_channel.py
def to_operator(self):
        """Try to convert channel to a unitary representation Operator."""
        mat = _to_operator(self.rep, self._data, *self.dim)
        return Operator(mat, self.input_dims(), self.output_dims())
def to_operator(self):
        """Try to convert channel to a unitary representation Operator."""
        mat = _to_operator(self.rep, self._data, *self.dim)
        return Operator(mat, self.input_dims(), self.output_dims())
Try to convert channel to a unitary representation Operator.