code: def mean(self):
      if self.count == 0:
          return 0.0
      return self.total_time / self.count
  
imports: import hashlib
  import inspect
  import logging
  import time
  import typing
  from functools import wraps
label_desc: Use image node_id 4 for calling the _TimerItem obj's underlying member method code with example usage: obj.mean() and returns: unknown, int