// @target: es2015
// @noImplicitAny: true

declare function f1();

declare function f2(): any;

function f3(x) {
}

function f4(x: any) {
    return x;
}

function f5(x: any): any {
    return x;
}

function f6(x: string, y: number);
function f6(x: string, y: string): any;
function f6(x: string, y) {
    return null;
}