func (api *GSLBAPI) findOrCreateBy(gslbName string) (*sacloud.GSLB, error) {

	req := &sacloud.Request{}
	req.AddFilter("Name", gslbName)
	res, err := api.Find()
	if err != nil {
		return nil, err
	}

	//すでに登録されている場合
	var gslbItem *sacloud.GSLB
	if res.Count > 0 {
		gslbItem = &res.CommonServiceGSLBItems[0]
	} else {
		gslbItem = sacloud.CreateNewGSLB(gslbName)
	}

	return gslbItem, nil
}
func (api *GSLBAPI) New(name string) *sacloud.GSLB {
	return sacloud.CreateNewGSLB(name)
}