docs: private boolean checkZoneRequirement(HashMap<Integer, Integer> requiredRepFactor, int zoneId) {
          if(requiredRepFactor.containsKey(zoneId)) {
              if(requiredRepFactor.get(zoneId) == 0) {
                  return false;
              } else {
                  requiredRepFactor.put(zoneId, requiredRepFactor.get(zoneId) - 1);
                  return true;
              }
          }
          return false;
  
      }