如何获取泛型函数的返回类型？

function myGenericFunction<T>(arg: T): T {
  return arg;
}

const result = myGenericFunction(123);
type ResultType = typeof result;

type ReturnType<T> = T extends (...args: any[]) => infer R ? R : never;

function myGenericFunction<T>(arg: T): T {
  return arg;
}

type ResultType = ReturnType<typeof myGenericFunction>;

function myGenericFunction<T>(arg: T): T {
  return arg;
}

type ResultType = ReturnType<typeof myGenericFunction>;