HarmonyOS 如何在 class 中表示两个自定义组件的父类或者泛型

class Data { 
  aa: number = 11; 
} 
 
class Model { 
  aa: string = '11'; 
} 
 
type UnionData = Data | Model 
 
@Entry 
@Component 
struct DatauionPage { 
  array: UnionData[] = [new Data(), new Data(), new Data()]; 
 
  @Builder 
  componentCloser(data: UnionData) { 
    if (data instanceof Data) { 
      Text(data.aa + '').fontSize(50) 
    } 
  } 
 
  build() { 
    Row() { 
      Column() { 
        ForEachCom({ arrayList: this.array, closer: this.componentCloser }) 
      } 
      .width('100%') 
    } 
    .height('100%') 
  } 
} 
 
@Component 
export struct ForEachCom { 
  arrayList: UnionData[] = [new Data(), new Data(), new Data()]; 
  @BuilderParam closer: (data: UnionData) => void = this.componentCloser 
 
  @Builder 
  componentCloser() { 
  } 
 
  build() { 
    Column() { 
      ForEach(this.arrayList, (item: UnionData) => { 
        Row() { 
          this.closer(item) 
        }.width('100%').height(200).backgroundColor('#eee') 
      }) 
    } 
  } 
}
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