=== tests/cases/compiler/b.ts ===
///<reference path="a.ts"/>
declare class E extends C {
>E : Symbol(E, Decl(b.ts, 0, 0))
>C : Symbol(C, Decl(a.ts, 0, 0))
}
=== tests/cases/compiler/a.ts ===
/*! Keep this pinned comment */
declare class C {
>C : Symbol(C, Decl(a.ts, 0, 0))
}

// Don't keep this comment.
declare class D {
>D : Symbol(D, Decl(a.ts, 2, 1))
}