def loop_head(self):
        raise NotImplementedError
Test whether the proposed transaction is permitted.  Raise an exception
dataset/ETHPy150Open numba/numba/numba/targets/arrayobj.py/Indexer.loop_head--crossover with--dataset/ETHPy150Open django-oscar/django-oscar-accounts/src/oscar_accounts/abstract_models.py/PostingManager.verify_transfer