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);
}