code: def _file_is_new(self, filepath):
      return filepath not in self._watched_modules
  
imports: import collections
  import os
  import sys
  import types
  from typing import Callable, Dict, List, Optional, Set
  from streamlit import config, file_util
  from streamlit.folder_black_list import FolderBlackList
  from streamlit.logger import get_logger
  from streamlit.source_util import get_pages
  from streamlit.watcher.path_watcher import NoOpPathWatcher, get_default_path_watcher_class
label_desc: Use image node_id 8 for calling the LocalSourcesWatcher obj's underlying member method code with example usage: obj._file_is_new(filepath) and returns: unknown