def close(self, all_fds=False):
        raise NotImplementedError()
Returns the name of the cql index
dataset/ETHPy150Open RobotWebTools/rosbridge_suite/rosbridge_server/src/tornado/ioloop.py/IOLoop.close--crossover with--dataset/ETHPy150Open datastax/python-driver/cassandra/cqlengine/columns.py/Column.db_index_name