code: def _set_timers():
      """Initialize timers."""
      global _GLOBAL_TIMERS
      _ensure_var_is_not_initialized(_GLOBAL_TIMERS, "timers")
      _GLOBAL_TIMERS = Timers()
  
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 13 for calling a global function with example usage: _set_timers() without return types