=== tests/cases/compiler/indexer2.ts ===
interface IHeapObjectProperty {}
>IHeapObjectProperty : IHeapObjectProperty

interface IDirectChildrenMap { 
>IDirectChildrenMap : IDirectChildrenMap

        hasOwnProperty(objectId: number) : boolean; 
>hasOwnProperty : (objectId: number) => boolean
>objectId : number

        [objectId: number] : IHeapObjectProperty[]; 
>objectId : number
>IHeapObjectProperty : IHeapObjectProperty
}    
var directChildrenMap = <IDirectChildrenMap>{}; 
>directChildrenMap : IDirectChildrenMap
><IDirectChildrenMap>{} : IDirectChildrenMap
>IDirectChildrenMap : IDirectChildrenMap
>{} : { [x: number]: undefined; }