HarmonyOS 接口回调的写法

请参考示例代码：

export interface MyInterDemo {
  func_1: () => void;
  func_2: () => boolean;
  func_3: (arg: string) => void;
}

@Entry
@Component
struct TestInterfacePage {

  testInter(inter: MyInterDemo) {
    console.log('testInter');
    inter.func_1();
    inter.func_2();
    inter.func_3('hello');
  }

  build() {
    Row() {
      Column() {
        Button('Test interface')
          .onClick(() => {
            let demo: MyInterDemo = {
              func_1: () => {
                console.log('func_1');
              },
              func_2: () => {
                console.log('func_2');
                return true;
              },
              func_3: (arg: string) => {
                console.log('func_3:' + arg);
              }
            }
            this.testInter(demo);
          })
      }
      .width('100%')
    }
    .height('100%')
  }
}