docstr: Stage files that have changed.
docstr_tok: ["Stage","files","that","have","changed","."]
code: def track_changed_files(self) -> None:
      """Stage files that have changed."""
      if not self.files_to_track:
          return
      logger.debug("Staging files: %s", self.files_to_track)
      return self.add(self.files_to_track)
  
file_path: dvc/dvc/repo/scm_context.py
imports: import logging
  import shlex
  from contextlib import contextmanager
  from functools import wraps
  from typing import TYPE_CHECKING, Any, Dict, Iterable, Iterator, List, Optional, Set, Union
  from dvc.log import logger
  from dvc.utils import relpath
  from dvc.utils.collections import ensure_list
label_desc: Use image node_id 5 for calling the SCMContext obj's underlying member method code with example usage: obj.track_changed_files() and returns: self