def METHOD_NAME(export_dir):
  """Checks if the model path contains session bundle model.
  Args:
    export_dir: string path to model checkpoint, for example 'model/00000123'
  Returns:
    true if path contains session bundle model files, ie META_GRAPH_DEF_FILENAME
  """
  meta_graph_filename = os.path.join(export_dir,
                                     constants.META_GRAPH_DEF_FILENAME)
  return file_io.file_exists(meta_graph_filename)