docs: def _FilterOutPathInfoDuplicates(path_infos):
    """Filters out duplicates from passed PathInfo objects.
  
    Args:
      path_infos: An iterable with PathInfo objects.
  
    Returns:
      A list of PathInfo objects with duplicates removed. Duplicates are
      removed following this logic: they're sorted by (ctime, mtime, atime,
      inode number) in the descending order and then the first one is taken
      and the others are dropped.
    """
    pi_dict = {}
  
    for pi in path_infos:
      path_key = (pi.path_type, pi.GetPathID())
      pi_dict.setdefault(path_key, []).append(pi)
  
    def _SortKey(pi):
      return (
          pi.stat_entry.st_ctime,
          pi.stat_entry.st_mtime,
          pi.stat_entry.st_atime,
          pi.stat_entry.st_ino,
      )
  
    for pi_values in pi_dict.values():
      if len(pi_values) > 1:
        pi_values.sort(key=_SortKey, reverse=True)
  
    return [v[0] for v in pi_dict.values()]