code: func (c *Overlay) HighlightRectWithParams(v *OverlayHighlightRectParams) (*gcdmessage.ChromeResponse, error) {
  	return gcdmessage.SendDefaultRequest(c.target, c.target.GetSendCh(), &gcdmessage.ParamRequest{Id: c.target.GetId(), Method: "Overlay.highlightRect", Params: v})
  }
docs: // HighlightRectWithParams - Highlights given rectangle. Coordinates are absolute with respect to the main frame viewport.