def link(self, netif1, netif2):
        self._linked_lock.acquire()
        if self.linked(netif1, netif2):
            self._linked_lock.release()
            return
        self._linked[netif1][netif2] = True
        self._linked_lock.release()
        ebq.ebchange(self)
Link two PyCoreNetIfs together, resulting in adding or removing
dataset/ETHPy150Open coreemu/core/daemon/core/netns/vnet.py/LxBrNet.link