def enqueue_item(self, _id):
        raise NotImplementedError("This method must be implemented.")
Returns the index of the first occurrence of the specified value in
dataset/ETHPy150Open dimagi/commcare-hq/hqscripts/generic_queue.py/GenericEnqueuingOperation.enqueue_item--crossover with--dataset/ETHPy150Open enthought/traitsui/traitsui/editors/table_editor.py/ReversedList.index