def update_link(self, src, dst):
        link = Link(src, dst)

        self[link] = time.time()
        self._map[src] = dst

        # return if the reverse link is also up or not
        rev_link = Link(dst, src)
        return self in rev_link
dataset/ETHPy150Open osrg/ryu/ryu/topology/switches.py/LinkState.update_link/swapped operands of `in`