code: def _ProcessFileSource(self, source):
      
  
      if source.path_type != rdf_paths.PathSpec.PathType.OS:
        raise ValueError("Only supported path type is OS.")
  
      paths = artifact_utils.InterpolateListKbAttributes(
          source.base_source.attributes["paths"], self.knowledge_base,
          self.ignore_interpolation_errors)
  
      file_finder_action = rdf_file_finder.FileFinderAction.Stat()
      request = rdf_file_finder.FileFinderArgs(
          paths=paths, pathtype=source.path_type, action=file_finder_action)
      action = file_finder.FileFinderOSFromClient
  
      yield action, request
docs: Glob paths and return StatEntry objects.