def hint(self, index):
        self.__check_okay_to_chain()
        if index is None:
            self.__hint = None
            return self

        self.__hint = helpers._index_document(index)
        return self
Pool's folder is deleted after Pool's deletion.
dataset/ETHPy150Open blynch/CloudMemeBackend/pymongo/cursor.py/Cursor.hint--crossover with--dataset/ETHPy150Open F-Secure/see/see/context/resources/test/qemu_test.py/PoolDeleteTest.test_delete_pool_folder