code: def aggregation(self):
      return {"r@1": mean, "r@2": mean, "mrr": mean}
  
imports: import numpy
  import inspect
  import lm_eval.datasets.mutual.mutual
  from lm_eval.base import Task, rf
  from lm_eval.metrics import mean
label_desc: Use image node_id 14 for calling the MuTualBase obj's underlying member method code with example usage: obj.aggregation() and returns: dict