CssTree t = css(fromString(css), allowSubstitutions);
String msg;
{
StringBuilder msgBuf = new StringBuilder();
t.formatTree(mc, 0, msgBuf);
msg = msgBuf.toString();
}
CssSchema cssSchema = CssSchema.getDefaultCss21Schema(mq);
new CssValidator(cssSchema, HtmlSchema.getDefault(mq), mq)