def assertFalse(self, expr, msg=None):
        if expr:
            msg = self._formatMessage(msg, "%s is not False" % safe_repr(expr))
            raise self.failureException(msg)
Sums up the size of the snapshot files that consist the backup for the
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.3/django/utils/unittest/case.py/TestCase.assertFalse--crossover with--dataset/ETHPy150Open AppScale/appscale/AppDB/backup/backup_recovery_helper.py/get_backup_size