code: def __call__(self, instance):
      instance._lock_at_dump = False
      output_list = luigi.task.flatten(instance.output())
      return self._run_with_lock(
          partial(self._func, self=instance), output_list
      )
  
imports: from functools import partial
  import luigi
label_desc: Use image node_id 2 for calling the RunWithLock obj's underlying member method code with example usage: obj.__call__(instance) and returns: self