code: def _set_merge_parser_arg(_parser):
      """
      config parser argument for merging
      """
  
      _parser.add_argument(
          "-m", "--merge-file", help="indicate merge yaml file"
      )
  
imports: import sys
  import argparse
  from argparse import Namespace
  import os, shutil
  import getopt
  from ruamel.yaml import YAML, yaml_object
  from ruamel.yaml.comments import CommentedSeq, CommentedMap
  from ruamel.yaml.tokens import CommentToken
label_desc: Use image node_id 22 for calling a global function with example usage: _set_merge_parser_arg(_parser) without return types