1. DomName('CSSGroupingRule.deleteRule')
  2. DocsEditable()
  3. Experimental()
void deleteRule(int index)

Source 

@DomName('CSSGroupingRule.deleteRule')
@DocsEditable()
@Experimental() // untriaged
void deleteRule(int index) => _blink.BlinkCSSGroupingRule.instance.deleteRule_Callback_1_(this, index);