=== tests/cases/conformance/types/typeAliases/classDoesNotDependOnBaseTypes.ts ===
var x: StringTree;
>x : string | StringTreeCollection
>StringTree : string | StringTreeCollection

if (typeof x !== "string") {
>typeof x !== "string" : boolean
>typeof x : string
>x : string | StringTreeCollection
>"string" : string

    x[0] = "";
>x[0] = "" : string
>x[0] : string | StringTreeCollection
>x : StringTreeCollection
>0 : number
>"" : string

    x[0] = new StringTreeCollection;
>x[0] = new StringTreeCollection : StringTreeCollection
>x[0] : string | StringTreeCollection
>x : StringTreeCollection
>0 : number
>new StringTreeCollection : StringTreeCollection
>StringTreeCollection : typeof StringTreeCollection
}

type StringTree = string | StringTreeCollection;
>StringTree : string | StringTreeCollection
>StringTreeCollection : StringTreeCollection

class StringTreeCollectionBase {
>StringTreeCollectionBase : StringTreeCollectionBase

    [n: number]: StringTree;
>n : number
>StringTree : string | StringTreeCollection
}

class StringTreeCollection extends StringTreeCollectionBase { }
>StringTreeCollection : StringTreeCollection
>StringTreeCollectionBase : StringTreeCollectionBase