docs: def is_instance_running(self, instance_id):
          """Checks if the instance is up and running.
  
          :param str instance_id: instance identifier
  
          :return: bool - True if running, False otherwise
          """
  
          # Here, it's always better if we update the instance.
          instance = self._load_instance(instance_id, force_reload=True)
          return instance.status == 'ACTIVE'