子组件使用@Link修饰成员变量时，如何通过父组件传值

@Entry 
@Component 
struct Player { 
  @State isPlaying: boolean = false 
  build() { 
 
    Column() { 
      PlayButton({ buttonPlaying: $isPlaying }) 
      Text(`Player is ${this.isPlaying ? '' : 'not'} playing`) 
        .fontSize(18) 
      Button('Parent:' + this.isPlaying) 
        .margin(15) 
        .onClick(() => { 
          this.isPlaying = !this.isPlaying; 
        }) 
    } 
  } 
}

@Component 
struct PlayButton { 
  @Link buttonPlaying: boolean 
 
  build() { 
    Column() { 
      Button(this.buttonPlaying ? 'pause' : 'play') 
        .margin(20) 
        .onClick(() => { 
          this.buttonPlaying = !this.buttonPlaying; 
        }) 
    } 
  } 
}