code: def send(self, stanza):
          
          if self.uplink:
              self.uplink.send(stanza)
          else:
              raise NoRouteError("No route for stanza")
docs: Send a stanza somwhere.
  
          The default implementation sends it via the `uplink` if it is defined
          or raises the `NoRouteError`.
  
          :Parameters:
              - `stanza`: the stanza to send.
          :Types:
              - `stanza`: `pyxmpp.stanza.Stanza`