code: def __files_exist(cls, files: _typing.Iterable[str]) -> bool:
      return all([os.path.exists(file) for file in files])
  
file_path: AutoGL/autogl/datasets/_data_source.py
imports: import os
  import typing
label_desc: Use image node_id 7 for calling the OnlineDataSource obj's underlying member method code with example usage: obj.__files_exist(cls, files) and returns: all