1. @DomName('WebGLRenderingContext.polygonOffset')
  2. @DocsEditable()
void polygonOffset(num factor, num units)

Source 

@DomName('WebGLRenderingContext.polygonOffset')
@DocsEditable()
void polygonOffset(num factor, num units) =>
    _blink.BlinkWebGLRenderingContext.instance
        .polygonOffset_Callback_2_(this, factor, units);