def __missing__(self, key):
        if self.default_factory is None:
            raise KeyError(key)
        else:
            ret = self[key] = self.default_factory(name=key)
            return ret
def set_values(self, values):
    self._locker.lock("emit_size_spin_button_value_changed")
    self._locker.lock("prevent_removal_below_min_size")