docs: def AddPathInfo(self, path_info):
      """Updates existing path information of the path record."""
  
      if self._path_type != path_info.path_type:
        message = "Incompatible path types: `%s` and `%s`"
        raise ValueError(message % (self._path_type, path_info.path_type))
      if self._components != path_info.components:
        message = "Incompatible path components: `%s` and `%s`"
        raise ValueError(message % (self._components, path_info.components))
  
      if path_info.timestamp in self._path_infos:
        raise ValueError("PathInfo with timestamp %r was added before." %
                         path_info.timestamp)
  
      new_path_info = path_info.Copy()
      if new_path_info.timestamp is None:
        new_path_info.timestamp = rdfvalue.RDFDatetime.Now()
      self._path_infos[new_path_info.timestamp] = new_path_info