1. @DomName('WebGL2RenderingContext.getInternalformatParameter')
  2. @DocsEditable()
  3. @Experimental()
Object getInternalformatParameter(int target, int internalformat, int pname)

Source 

@DomName('WebGL2RenderingContext.getInternalformatParameter')
@DocsEditable()
@Experimental() // untriaged
Object getInternalformatParameter(
        int target, int internalformat, int pname) =>
    (_blink.BlinkWebGL2RenderingContext.instance
        .getInternalformatParameter_Callback_3_(
            this, target, internalformat, pname));