code: func (c *Cast) StartTabMirroringWithParams(v *CastStartTabMirroringParams) (*gcdmessage.ChromeResponse, error) {
  	return gcdmessage.SendDefaultRequest(c.target, c.target.GetSendCh(), &gcdmessage.ParamRequest{Id: c.target.GetId(), Method: "Cast.startTabMirroring", Params: v})
  }
docs: // StartTabMirroringWithParams - Starts mirroring the tab to the sink.