1. @DomName('WebGL2RenderingContext.isEnabled')
  2. @DocsEditable()
  3. @Experimental()
bool isEnabled(int cap)

Source 

@DomName('WebGL2RenderingContext.isEnabled')
@DocsEditable()
@Experimental() // untriaged
bool isEnabled(int cap) => _blink.BlinkWebGL2RenderingContext.instance
    .isEnabled_Callback_1_(this, cap);