code: def unobserved_option(args, run):
      """Ignore all observers for this run."""
      run.unobserved = True
  
imports: from typing import Callable
  import inspect
  import re
  from sacred.run import Run
  from sacred.commands import print_config
  from sacred.utils import convert_camel_case_to_snake_case
label_desc: Use image node_id 9 for calling a global function with example usage: unobserved_option(args, run) without return types