TypeScript flip function

flip.ts

function flip<A, B, C>(f: (a0: A, a1: B) => C): (b0: B, b1: A) => C {
    return (b0: B, b1: A) => {
        return f(b1, b0);
    }
}

// ==== TEST ====

const x: string = 'test';
const y: number = 1;

function f(arg1: string, arg2: number): string {
    return arg1 + String(arg2);
}

const g = flip(f);

console.log(
    f(x, y) === g(y, x)
);