code: def announced_networks(self):
          
          return [(Element.from_href(ne.get('announced_ne_ref')),
                   Element.from_href(ne.get('announced_rm_ref')))
                   for ne in self.data.get('announced_ne_setting')]
docs: Show all announced networks for the BGP configuration.
          Returns tuple of advertised network, routemap. Route
          map may be None.
          ::
          
              for advertised in engine.bgp.advertisements:
                  net, route_map = advertised
          
          :return: list of tuples (advertised_network, route_map).