code: def services_resolved(self):
          
          self._disconnect_service_signals()
  
          services_regex = re.compile(self._device_path + '/service[0-9abcdef]{4}$')
          managed_services = [
              service for service in self._object_manager.GetManagedObjects().items()
              if services_regex.match(service[0])]
          self.services = [Service(
              device=self,
              path=service[0],
              uuid=service[1]['org.bluez.GattService1']['UUID']) for service in managed_services]
  
          self._connect_service_signals()
docs: Called when all device's services and characteristics got resolved.