HarmonyOS ArkTS如何判断一个值在枚举类型中

可参考如下示例来判断一个值是否在枚举类型中：

import { promptAction } from '@kit.ArkUI';

@Entry
@Component
struct Index {
  @State message: boolean = false;

  get() {
    this.message = Object.values(MyType).includes('4' as ESObject as MyType)

  }

  build() {
    Column() {
      Button('点击').onClick(() => {
        this.get()
        promptAction.showToast({ message: `判断结果：${this.message}` })
      })
    }.width('100%').height('100%').justifyContent(FlexAlign.Center)
  }
}

export enum MyType {
  type1 = '1',
  type2 = '2',
  type3 = '3',
}