class_docstr: Group of timers.
code: def __call__(self, name):
      if name not in self.timers:
          self.timers[name] = _Timer(name)
      return self.timers[name]
  
imports: import os
  import sys
  import time
  import torch
  from apex.transformer.microbatches import build_num_microbatches_calculator
  from .arguments import parse_args
label_desc: Use image node_id 2 for calling the Timers obj's underlying member method code with example usage: obj.__call__(name) and returns: self