def remove_node(self, addr):
        """
        For the removed node, this method is for the cleaning job including
        shutting down the backup storage for the removed node.
        """
        if self.addrs not in addr: return
        
        self.addrs.remove(addr)
        self.backup_stores[addr].shutdown()
        del self.backup_stores[addr]
dataset/ETHPy150Open chineking/cola/cola/core/mq/node.py/LocalMessageQueueNode.remove_node/swapped operands of `not in`