code: def register_subcommand(parser: _SubParsersAction):
      env_parser = parser.add_parser(
          "env", help="Print information about the environment."
      )
      env_parser.set_defaults(func=EnvironmentCommand)
  
file_path: hub-client/src/huggingface_hub/commands/env.py
imports: from argparse import _SubParsersAction
  from ..utils import dump_environment_info
  from .None import BaseHuggingfaceCLICommand
label_desc: Use image node_id 2 for calling the EnvironmentCommand obj's underlying member method code with example usage: obj.register_subcommand(parser) without return types