=== tests/cases/compiler/functionOverloads10.ts ===
function foo(foo:string, bar:number);
>foo : { (foo: string, bar: number): any; (foo: string): any; }
>foo : string
>bar : number

function foo(foo:string);
>foo : { (foo: string, bar: number): any; (foo: string): any; }
>foo : string

function foo(foo:any){ }
>foo : { (foo: string, bar: number): any; (foo: string): any; }
>foo : any