code: def chk_warn(obj, fix=False):
      rep = Report(KeyError)
      if not "anotherkey" in obj:
          rep.problem_level = 30
          rep.problem_msg = 'no "anotherkey"'
          if fix:
              obj["anotherkey"] = "a string"
              rep.fix_msg = 'added "anotherkey"'
      return obj, rep
  
file_path: nibabel/nibabel/tests/test_batteryrunners.py
imports: import logging
  from io import StringIO
  import pytest
  from ..batteryrunners import BatteryRunner, Report
label_desc: Use image node_id 3 for calling a global function with example usage: chk_warn(obj, fix) and returns: obj,  rep