@Override
  public @Nullable CharSequence getFlavor(@NotNull IndexedFile file) {
    VirtualFile vFile = file.getFile();
    VirtualFileSystem fs = vFile.getFileSystem();
    if (!(fs instanceof JarFileSystem)) return null;
    VirtualFile root = ((JarFileSystem)fs).getRootByEntry(vFile);
    return root == null ? null : root.getNameSequence();
  }
@Override
  public @Nullable CharSequence getFlavor(@NotNull IndexedFile file)