=== tests/cases/compiler/b.ts ===
///<reference path="a.ts"/>
declare function foobar(a: typeof foo): typeof bar;
>foobar : (a: () => any) => () => any
>a : () => any
>foo : () => any
>bar : () => any

=== tests/cases/compiler/a.ts ===
/*! Keep this pinned comment */
declare function foo();
>foo : () => any

// Don't keep this comment.
declare function bar();
>bar : () => any