Set the framer in use for the receiving side of the
        connection.  The framer state will be reset next time the
        framer is used.

def recv_framer(self, value):
        """
        Set the framer in use for the receiving side of the
        connection.  The framer state will be reset next time the
        framer is used.
        """

        if not isinstance(value, framers.Framer):
            raise ValueError("framer must be an instance of tendril.Framer")

        self._recv_framer = value