@Override
  public List<String> getUrlFor(PsiElement element, PsiElement originalElement) {
    final VirtualFile helpFile = getHelpFile(originalElement);
    if (helpFile == null || !(helpFile.getFileSystem() instanceof LocalFileSystem)) {
      return null;
    }
    return Collections.singletonList(helpFile.getUrl());
  }
@Override
  public List<String> getUrlFor(PsiElement element, PsiElement originalElement)