code: def aggregation(self):
      return {"acc": mean}
  
imports: import inspect
  import lm_eval.datasets.unscramble.unscramble
  from lm_eval.base import Task, rf
  from lm_eval.metrics import mean
label_desc: Use image node_id 11 for calling the WordUnscrambleTask obj's underlying member method code with example usage: obj.aggregation() and returns: dict