private static @NotNull Pair<StoredContent, Long> getActualContentNoAcquire(@NotNull VirtualFile f) {
    ContentAndTimestamps result = f.getUserData(SAVED_DOCUMENT_CONTENT_AND_STAMP_KEY);
    if (result == null) {
      return Pair.create(StoredContent.transientContent(f), f.getTimeStamp());
    }
    return Pair.create(result.content, result.registeredTimestamp);
  }
private static @NotNull Pair<StoredContent, Long> getActualContentNoAcquire(@NotNull VirtualFile f)