private static boolean spacesOnly(@Nullable TreeElement node) {
    if (node == null) return false;

    if (isWhitespaceOrEmpty(node)) return true;
    PsiElement psi = node.getPsi();
    if (psi == null) {
      return false;
    }
    Language language = psi.getLanguage();
    return WhiteSpaceFormattingStrategyFactory.getStrategy(language).containsWhitespacesOnly(node);
  }
private static boolean spacesOnly(@Nullable TreeElement node)