code: def _check_blocking(run, blocking, state):
      if blocking:
          _handle_blocking(run, blocking, state)
          return False
      return None
  
imports: import logging
  import os
  import signal
  import time
  from guild import lock
  from guild import op_util
  from guild import util
  from guild import var
label_desc: Use image node_id 21 for calling a global function with example usage: _check_blocking(run, blocking, state) and returns: None, False