def merge_control(self, control):
        assert bool(control.multiple) >= bool(self.multiple)
        # usually, isinstance(control, self.__class__)
        self.items.extend(control.items)
dataset/ETHPy150Open deanhiller/databus/webapp/play1.3.x/samples-and-tests/i-am-a-developer/mechanize/ClientForm.py/ListControl.merge_control/operator `==` -> `>=`