code: def add_parser(subparsers, parent_parser):
      VERSION_HELP = (
          "Display the DVC version and system/environment information."
      )
      version_parser = subparsers.add_parser(
          "version",
          parents=[parent_parser],
          description=append_doc_link(VERSION_HELP, "version"),
          help=VERSION_HELP,
          formatter_class=formatter.RawDescriptionHelpFormatter,
          aliases=["doctor"],
      )
      version_parser.set_defaults(func=CmdVersion)
  
file_path: dvc/dvc/commands/version.py
imports: from dvc.cli import formatter
  from dvc.cli.command import CmdBaseNoRepo
  from dvc.cli.utils import append_doc_link
  from dvc.log import logger
  from dvc.ui import ui
label_desc: Use image node_id 1 for calling a global function with example usage: add_parser(subparsers, parent_parser) without return types