HarmonyOS ArrayList 遇到问题

Error message:The forEach method cannot be bound, 调用的对象是ArrayList

export class LUBCUAAgreementInfo {
  id?: number
  type?: string
}

export class LUBCUAUnifyAuthSceneInfoResult {
  id?: number
  sceneCode?: string
  agreementInfoDTOS?: ArrayList<LUBCUAAgreementInfo>
}

调用代码

@Component
export struct LUBCUALoginView {
  @Prop agreementData?: LUBCUAUnifyAuthSceneInfoResult

  aboutToAppear(): void {
    this.agreementData?.agreementInfoDTOS?.forEach((value: LUBCUAAgreementInfo, index: number) => {

    })
  }
}