=== tests/cases/compiler/b.ts ===
///<reference path="a.ts"/>
declare module E {
>E : typeof E

    class foobar extends D.bar {
>foobar : foobar
>D.bar : any
>D : typeof D
>bar : D.bar

        foo();
>foo : () => any
    }
}
=== tests/cases/compiler/a.ts ===
/*! Keep this pinned comment */
declare module C {
>C : typeof C

    function foo();
>foo : () => any
}

// Don't keep this comment.
declare module D {
>D : typeof D

    class bar { }
>bar : bar
}