code: def _output_summary_for_run(run, op):
      if not op.callbacks or not op.callbacks.init_output_summary:
          return None
      return op.callbacks.init_output_summary(op, run)
  
imports: import logging
  import os
  import subprocess
  import time
  from guild import config
  from guild import exit_code
  from guild import log
  from guild import op_dep
  from guild import op_util
  from guild import run
  from guild import util
label_desc: Use image node_id 21 for calling a global function with example usage: _output_summary_for_run(run, op) and returns: op, None