function f1(res: string) {
  console.log("F1: " + res);
  return 1;
}

function f2(res: number) {
  console.log("F1: " + res);
  return { hoho: "xd" };
}

function f3(abc: { hoho: string }) {
  return { uu: "XD" };
}

declare function compose<TResult, TArg, TResult1>(f2: (arg: TResult1) => TResult, f1: (arg: TArg) => TResult1): (arg: TArg) => TResult;
declare function compose<TResult, TArg, TResult1, TResult2>(f3: (arg: TResult2) => TResult, f2: (arg: TResult1) => TResult2, f1: (arg: TArg) => TResult1): (arg: TArg) => TResult;


const xd = compose(f2, f1);
const xd2 = compose(f3, f2, f1);