code: def _flag_name(action):
      for opt in action.option_strings:
          if opt.startswith("--"):
              return opt[2:]
      return None
  
imports: import argparse
  import json
  import logging
  import sys
  from guild import entry_point_util
  from guild import flag_util
  from guild import log
  from guild import python_util
  from guild import util
label_desc: Use image node_id 19 for calling a global function with example usage: _flag_name(action) and returns: None, opt