code: func (F *Frisby) SetDatas(datas map[string]string) *Frisby {
  	if F.Req.Data == nil {
  		F.Req.Data = make(map[string]string)
  	}
  	for key, value := range datas {
  		F.Req.Data[key] = value
  	}
  	return F
  }
docs: // Set several Form data for the coming request