在這種情況下，最好的方法是鏈接 Observables 并SEARCH_QUERY_COMPLETE在所有訂閱完成后分派操作？我注意到這forkJoin已被棄用......const launchSearchQuery = () => {    mainDispatch({      type: ActionTypes.LAUNCH_SEARCH_QUERY,    });    if (mainState.searchSection.searchQuery !== "") {      // get order details      orderDetailRepository.getOrderDetails(mainState.searchSection.searchQuery).subscribe((response) => {        searchResultCards.push(mapSearchResultCard(response, DashboardSectionTitles.ORDER_DETAILS));      });      // get customer details      customerDetailRepository.getCustomerDetails(mainState.searchSection.searchQuery).subscribe((response) => {        searchResultCards.push(mapSearchResultCard(response, DashboardSectionTitles.CUSTOMER_DETAILS));      });      // get equipment details      equipmentDetailRepository.getEquipmentDetails(mainState.searchSection.searchQuery).subscribe((response) => {        searchResultCards.push(mapSearchResultCard(response, DashboardSectionTitles.EQUIPMENT_DETAILS));      });      // get equipment return details      equipmentReturnDetailRepository        .getEquipmentReturnDetails(mainState.searchSection.searchQuery)        .subscribe((response) => {          searchResultCards.push(mapSearchResultCard(response, DashboardSectionTitles.EQUIPMENT_RETURN_DETAILS));        });    }        // !!! only execute this when all subscriptions are completed !!!    mainDispatch({        type: ActionTypes.SEARCH_QUERY_COMPLETE,        payload: searchResultCards,    });  };這是藍圖getOrderDetailsexport interface IOrderDetailRepository {  getOrderDetails: (query: string) => Observable<IOrderDetail[]>;}