func getFeedData(feedId : String) -> Promise<FeedDataTemplate> {
        //Fetch FeedData
}

func getDetailData(feedId : String) -> Promise<DetailModel> {
        //Fetch Detail data
}

let promise1 = self.apiManager.getFeedData(feedId: "FeedID")
let promise2 = self.apiManager.getDetailData(feedId: "FeedID")


firstly {
    when(fulfilled: feedDataPromise, labelDataPromise)
}.then { result1, result2 in

     //Merge two datas and show
    self.mergeAndShowData(feed:result1, label:result2)
}