private static void processErrorNode(PsiBuilder psiBuilder, LighterASTNode node, XmlBuilder builder) {
    assert node.getTokenType() == TokenType.ERROR_ELEMENT;
    String message = PsiBuilderImpl.getErrorMessage(node);
    assert message != null;
    builder.error(message, node.getStartOffset(), node.getEndOffset());
  }
private static void processErrorNode(PsiBuilder psiBuilder, LighterASTNode node, XmlBuilder builder)