code: func (c *Target) ActivateTargetWithParams(v *TargetActivateTargetParams) (*gcdmessage.ChromeResponse, error) {
  	return gcdmessage.SendDefaultRequest(c.target, c.target.GetSendCh(), &gcdmessage.ParamRequest{Id: c.target.GetId(), Method: "Target.activateTarget", Params: v})
  }
docs: // ActivateTargetWithParams - Activates (focuses) the target.