(self, pkt, pay)
return pkt+pay
DEV: called right after the current layer is build.
DEV: called right after the current layer is build.
DEV : called right after the current layer is build .
def post_build(self, pkt, pay):
        """DEV: called right after the current layer is build."""
        return pkt+pay
def post_build ( self , pkt , pay ) : return pkt + pay