docs: def unpublish(self, daap_server):
          """
          Unpublish a given server.
  
          If the server was not published, this method will not do anything.
  
          :param DAAPServer daap_server: DAAP Server instance to publish.
          """
  
          if daap_server not in self.daap_servers:
              return
  
          self.zeroconf.unregister_service(self.daap_servers[daap_server])
  
          del self.daap_servers[daap_server]