def is_persistent(self, record):
        cache_key = self._get_cache_key(record)
        return cache_key in self.persistent
Returns the previous output for the input at index.
dataset/ETHPy150Open lektor/lektor/lektor/db.py/RecordCache.is_persistent--crossover with--dataset/ETHPy150Open ricmoo/pycoind/pycoind/blockchain/transaction.py/Transaction.previous_output