def get_current_balance(self, unique_ledger_reference):
        if self._balances not in unique_ledger_reference:
            current_balance = self.get_current_ledger_value(unique_ledger_reference)
            self._balances[unique_ledger_reference] = current_balance
        return self._balances[unique_ledger_reference]
dataset/ETHPy150Open dimagi/commcare-hq/corehq/form_processor/interfaces/ledger_processor.py/LedgerDBInterface.get_current_balance/swapped operands of `not in`