code: def _StopAt0(coord, n):
      if n[0] == 0:
          coord.request_stop()
      else:
          n[0] -= 1
  
imports: import sys
  import threading
  import time
  from tensorflow.python.framework import errors_impl
  from tensorflow.python.platform import test
  from tensorflow.python.training import coordinator
label_desc: Use image node_id 6 for calling a global function with example usage: _StopAt0(coord, n) without return types