@NotNull
  private static CellAppearanceEx forVirtualFilePointer(@NotNull final LightFilePointer filePointer) {
    final VirtualFile file = filePointer.getFile();
    return file != null ? FileAppearanceService.getInstance().forVirtualFile(file)
                        : FileAppearanceService.getInstance().forInvalidUrl(filePointer.getPresentableUrl());
  }
@NotNull
  private static CellAppearanceEx forVirtualFilePointer(@NotNull final LightFilePointer filePointer)