(self)
return None
Get the heartbeat interval if it is set.

        Returns:
            The heartbeat interval if it is set, otherwise :obj:`None`.
Get the heartbeat interval if it is set.
Get the heartbeat interval if it is set .
def get_heartbeat_interval(self) -> Optional[int]:
        """Get the heartbeat interval if it is set.

        Returns:
            The heartbeat interval if it is set, otherwise :obj:`None`.
        """
        return None
def get_heartbeat_interval ( self ) -> Optional [ int ] : return None