def __and__(self, other: AbstractControlValues) -> AbstractControlValues:
        """Returns a cartesian product of all control values predicates in `self` x `other`.

        The `and` of two control values `cv1` and `cv2` represents a control value object
        acting on the union of qubits represented by `cv1` and `cv2`. For example:

        >>> cv1 = cirq.ProductOfSums([(0, 1), 2])
        >>> cv2 = cirq.SumOfProducts([[0, 0], [1, 1]])
        >>> assert cirq.num_qubits(cv1 & cv2) == cirq.num_qubits(cv1) + cirq.num_qubits(cv2)

        Args:
          other: An instance of `AbstractControlValues`.

        Returns:
          An instance of `AbstractControlValues` that represents the cartesian product of
          control values represented by `self` and `other`.
        """
        return SumOfProducts(
            tuple(x + y for (x, y) in itertools.product(self.expand(), other.expand()))
        )
Returns a cartesian product of all control values predicates in `self` x `other`.

        The `and` of two control values `cv1` and `cv2` represents a control value object
        acting on the union of qubits represented by `cv1` and `cv2`. For example:

        >>> cv1 = cirq.ProductOfSums([(0, 1), 2])
        >>> cv2 = cirq.SumOfProducts([[0, 0], [1, 1]])
        >>> assert cirq.num_qubits(cv1 & cv2) == cirq.num_qubits(cv1) + cirq.num_qubits(cv2)

        Args:
          other: An instance of `AbstractControlValues`.

        Returns:
          An instance of `AbstractControlValues` that represents the cartesian product of
          control values represented by `self` and `other`.
        
cirq-core/cirq/ops/control_values.py