when studying Mini Program, I found that webstorm has no relevant code hint plug-ins, only an old code snippet plug-in, so I want to write a d.ts by myself. The problem now is that there can be hints, but if the parameter is a function, it cannot complete the function body, for example:
index.d.ts

interface AppObj {
    onLaunch?(): void;
    onShow?(): void;
    onHide?(): void;
    onError?(): void;
    onPageNotFound?(): void;
    globalData?: Object;
}
declare function App(obj: AppObj):void;

index.js

App({
    onLa
})

if you enter onLa in js and press tab , you can complete it to onLaunch , but I want to complete it into the form of onLaunch () {} or onLaunch: function () {} or onLaunch: () = > {} , how to edit d.ts