@property
    def free(self):
        return self.total - self.used
Add an item before some item. If the given item does not exist the
dataset/ETHPy150Open BU-NU-CLOUD-SP16/Trusted-Platform-Module-nova/nova/objects/numa.py/NUMAPagesTopology.free--crossover with--dataset/ETHPy150Open rwl/muntjac/muntjac/ui/menu_bar.py/MenuItem.addItemBefore