def _has_mixture_(self) -> bool:
        """Whether this value has a mixture representation.

        This method is used by the global `cirq.has_mixture` method.  If this
        method is not present, or returns NotImplemented, it will fallback
        to using _mixture_ with a default value, or False if neither exist.

        Returns:
          True if the value has a mixture representation, Falseotherwise.
        """
Whether this value has a mixture representation.

        This method is used by the global `cirq.has_mixture` method.  If this
        method is not present, or returns NotImplemented, it will fallback
        to using _mixture_ with a default value, or False if neither exist.

        Returns:
          True if the value has a mixture representation, Falseotherwise.
        
cirq-core/cirq/protocols/mixture_protocol.py