def has_key(self, key, version=None):
        return self.get(key, version=version) is not None
Checks if the item has children (if it is a sub-menu).
dataset/ETHPy150Open django/django/django/core/cache/backends/base.py/BaseCache.has_key--crossover with--dataset/ETHPy150Open rwl/muntjac/muntjac/ui/menu_bar.py/MenuItem.hasChildren