def clear(self): raise FrozenInstanceError()
def pop(self, key, **kwargs): raise FrozenInstanceError()
def __delattr__(self, name): raise FrozenInstanceError()
def __setattr__(self, name, value): raise FrozenInstanceError()
def __delitem__(self, key): raise FrozenInstanceError()
def __setitem__(self, key, value): raise FrozenInstanceError()