def __init__(self, operator_session_id_ref):
        """Initialize with a reference to the operator_session_id variable.

        Args:
            operator_session_id_ref: A reference or container holding the operator's session ID
        """
        super().__init__()
        self.operator_session_id_ref = operator_session_id_ref
Initialize with a reference to the operator_session_id variable.

        Args:
            operator_session_id_ref: A reference or container holding the operator's session ID
        
examples/phone-chatbot/daily-pstn-call-transfer/bot.py