Source
int addRule(String selector, String style, [int index]) {
if (index != null) {
return _blink.BlinkCSSStyleSheet.instance.addRule_Callback_3_(unwrap_jso(this), selector, style, index);
}
return _blink.BlinkCSSStyleSheet.instance.addRule_Callback_2_(unwrap_jso(this), selector, style);
}