订阅emitter分享，谁有更好的办法？

sendAccountSubscription(){ 
  let event: emitter.InnerEvent = { 
    eventId: this.emitterId 
  } 
  let eventData: emitter.EventData = { 
    data: { 
      'isAccountants': true 
    } 
  } 
  emitter.emit(event, eventData); 
  this.isSaveCon = -1; 
}

getSubscription(){ 
  let innerEvent: emitter.InnerEvent = { 
    eventId: this.emitterId 
  }; 
  emitter.once(innerEvent, (eventData: emitter.EventData) => { 
    let isAccountants:boolean = eventData.data!['isAccountants']; 
    HiLog.i(TAG, 'int isAccountants' + JSON.stringify(isAccountants)); 
    if (isAccountants) { 
      this.destinationBackPress(); 
    } 
  }); 
}