TypeScript/tests/baselines/reference/specializedSignatureInInterface.types

=== tests/cases/compiler/specializedSignatureInInterface.ts ===
interface A {
>A : A

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

interface B extends A {
>B : B
>A : A

  (key:'foo'):string;
>key : 'foo'

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