code: def add_parser(experiments_subparsers, parent_parser):
      EXPERIMENTS_CLEAN_HELP = (
          "Cleanup experiments temporary internal files."
      )
      experiments_clean_parser = experiments_subparsers.add_parser(
          "clean",
          parents=[parent_parser],
          description=append_doc_link(
              EXPERIMENTS_CLEAN_HELP, "exp/clean"
          ),
          help=EXPERIMENTS_CLEAN_HELP,
          formatter_class=formatter.RawDescriptionHelpFormatter,
      )
      experiments_clean_parser.set_defaults(func=CmdExperimentsClean)
  
file_path: dvc/dvc/commands/experiments/clean.py
imports: from dvc.cli import formatter
  from dvc.cli.command import CmdBase
  from dvc.cli.utils import append_doc_link
  from dvc.log import logger
label_desc: Use image node_id 1 for calling a global function with example usage: add_parser(experiments_subparsers, parent_parser) without return types