如何使用可选参数定义泛型接口

interface MyGenericInterface<T, U?> {
  property1: T;
  property2?: U;
  method1(arg1: T): void;
  method2?(arg1: U): void;
}

interface MyGenericInterface<T, U?> {
  property1: T;
  property2?: U;
  method1(arg1: T): void;
  method2?(arg1: U): void;
}

class MyClass<T, U> implements MyGenericInterface<T, U> {
  property1: T;
  property2?: U;

  constructor(prop1: T, prop2?: U) {
    this.property1 = prop1;
    this.property2 = prop2;
  }

  method1(arg1: T): void {
    console.log(arg1);
  }

  method2?(arg1: U): void {
    console.log(arg1);
  }
}

const myInstance = new MyClass<string, number>("Hello", 123);
myInstance.method1("World"); // Output: World
myInstance.method2(456); // Output: 456