TimePickerFormat is not defined

@Entry  
@Component  
struct a {  
  @State isMilitaryTime: boolean = false  
  private selectedTime: Date = new Date('2022-07-22T08:00:00')  
  
  build() {  
    Column() {  
      Button('切换12小时制/24小时制')  
        .margin({ top: 30, bottom: 30 })  
        .onClick(() => {  
          this.isMilitaryTime = !this.isMilitaryTime  
        })  
      TimePicker({  
        selected: this.selectedTime,  
        format:TimePickerFormat.HOUR_MINUTE_SECOND  
      })  
        .useMilitaryTime(this.isMilitaryTime)  
        .onChange((value: TimePickerResult) => {  
          this.selectedTime.setHours(value.hour, value.minute)  
          console.info('select current date is: ' + JSON.stringify(value))  
        })  
  
    }.width('100%')  
  }  
}