=== tests/cases/compiler/addMoreCallSignaturesToBaseSignature2.ts ===
interface Foo {
>Foo : Foo

    (bar:number): string;
>bar : number
}

interface Bar extends Foo {
>Bar : Bar
>Foo : Foo

    (key: string): string;
>key : string
}

var a: Bar;
>a : Bar
>Bar : Bar

var kitty = a(1);
>kitty : string
>a(1) : string
>a : Bar
>1 : number