1. DomName('WebGL2RenderingContext.getError')
  2. DocsEditable()
  3. Experimental()
int getError()

Source 

@DomName('WebGL2RenderingContext.getError')
@DocsEditable()
@Experimental() // untriaged
int getError() => _blink.BlinkWebGL2RenderingContext.instance.getError_Callback_0_(this);