private List<LprInfo> getWaitlistMasterLprs(
     Map<String, Set<String>> rgIdToAoIds, ContextInfo context)
     throws MissingParameterException, InvalidParameterException, OperationFailedException,
         PermissionDeniedException {
   List<LprInfo> waitListLprs = new ArrayList<>();
   for (String rgId : rgIdToAoIds.keySet()) {
     List<LprInfo> lprs = lprService.getLprsByLui(rgId, context);
     for (LprInfo lpr : lprs) {
       if (LprServiceConstants.WAITLIST_RG_LPR_TYPE_KEY.equals(lpr.getTypeKey())) {
         waitListLprs.add(lpr);
       }
     }
   }
   return waitListLprs;
 }