我开始使用Typescript2.5，现在我在Angulartypescript定义文件中收到以下代码消息:interfaceIHttpPromiseextendsIPromise{success(callback:IHttpPromiseCallback):IHttpPromise;error(callback:IHttpPromiseCallback):IHttpPromise;then(successCallback:(response:IHttpPromiseCallbackArg)=>IPromise,errorCallback?:(response:IHttpPromise