code: def higher_is_better(self):
      return {"ppl": False, "acc": True}
  
imports: from lm_eval.base import Task, rf
  from lm_eval.metrics import mean, perplexity
label_desc: Use image node_id 11 for calling the LambadaBase obj's underlying member method code with example usage: obj.higher_is_better() and returns: dict