=== tests/cases/compiler/partiallyAmbientFundule.ts ===
declare module foo {
>foo : Symbol(foo, Decl(partiallyAmbientFundule.ts, 0, 0), Decl(partiallyAmbientFundule.ts, 2, 1))

    export function x(): any;
>x : Symbol(x, Decl(partiallyAmbientFundule.ts, 0, 20))
}
function foo () { } // Legal, because module is ambient
>foo : Symbol(foo, Decl(partiallyAmbientFundule.ts, 0, 0), Decl(partiallyAmbientFundule.ts, 2, 1))