HarmonyOS 为什么运行结果是parent child parent 能解释一下吗

运行代码如下：

@Component
struct Child {
  label: string = `Child`
  @Builder customBuilder() {}
  @Builder customChangeThisBuilder() {}
  @BuilderParam customBuilderParam: () => void = this.customBuilder;
  @BuilderParam customChangeThisBuilderParam: () => void = this.customChangeThisBuilder;
  build() {
    Column() {
      this.customBuilderParam()
      this.customChangeThisBuilderParam()
    }
  }
}

@Entry
@Component
struct Parent {
  label: string = `Parent`
  @Builder componentBuilder() {
    Text(`${this.label}`)
  }
  build() {
    Column() {
      this.componentBuilder()
      Child({ customBuilderParam: this.componentBuilder, customChangeThisBuilderParam: ():void=>{this.componentBuilder()} })
    }
  }
}