1. DomName('WebGL2RenderingContext.isRenderbuffer')
  2. DocsEditable()
  3. Experimental()
bool isRenderbuffer(Renderbuffer renderbuffer)

Source 

@DomName('WebGL2RenderingContext.isRenderbuffer')
@DocsEditable()
@Experimental() // untriaged
bool isRenderbuffer(Renderbuffer renderbuffer) => _blink.BlinkWebGL2RenderingContext.instance.isRenderbuffer_Callback_1_(this, renderbuffer);