<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def list_route_advertised_from_bgp_speaker(self, speaker_id, **_params):
 """Fetches a list of all routes advertised by BGP speaker."""

        return self.get((self.bgp_speaker_path % speaker_id) +
                        "/get_advertised_routes", params=_params)