code: func (c *Emulation) SetVisibleSizeWithParams(v *EmulationSetVisibleSizeParams) (*gcdmessage.ChromeResponse, error) {
  	return gcdmessage.SendDefaultRequest(c.target, c.target.GetSendCh(), &gcdmessage.ParamRequest{Id: c.target.GetId(), Method: "Emulation.setVisibleSize", Params: v})
  }
docs: // SetVisibleSizeWithParams - Resizes the frame/viewport of the page. Note that this does not affect the frame's container (e.g. browser window). Can be used to produce screenshots of the specified size. Not supported on Android.