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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def add_menu(self, menu):
        '''add to the default popup menu'''
        from MAVProxy.modules.mavproxy_map import mp_slipmap
        self.default_popup.add(menu)
        self.map.add_object(mp_slipmap.SlipDefaultPopup(self.default_popup, combine=True))