code: def get_used_features(log: Dict) -> List[str]:
      return first((gen_dict_extract("features", log)))
  
file_path: fklearn/src/fklearn/tuning/utils.py
imports: from typing import Any, Dict, Generator, List
  from toolz.curried import reduce, partial, pipe, first, curry
  from fklearn.metrics.pd_extractors import extract
  from fklearn.types import LogListType, LogType, ExtractorFnType, ValidatorReturnType, EvalReturnType
label_desc: Use image node_id 3 for calling a global function with example usage: get_used_features(log) and returns: first