HarmonyOS dialog在非组件类中无法弹出

简单示例如下：

class Model {
  title: string
  handler: ()=>void
}

@Component
struct Page {
  dataSource: DataSource // 外部传入
  models: Model[] = this.dataSource.initData()
  build {
  Column() {
    List() {
      ForEach(this.models,(model: Model,index) => {
        ListItem() { Text(model.title) }
        .onClick(() => { model.handler() })
      })
    }
    .width('100%')
    .height('100%')
  }
}

class DataSource {
  dialog?: CustomDialogController
  initData(): Model[] {
    //....构造一个models数组，这里仅举一例
    const model1 = New Model('名称',() => {
      /// 在此处构造CustomDialogController，并使用open弹出
      this.dialog = new CustomDialogController({
        builder: some,
        customStyle: true,
        alignment: DialogAlignment.Bottom
      })
      this.dialog.open()
    })
  }
}