code: def _check_state_can_start(run, state):
      if not state.can_start_cb:
          return None
      return state.can_start_cb(run, state)
  
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 24 for calling a global function with example usage: _check_state_can_start(run, state) and returns: state, None