code: protected Map<String, Object> getServiceHandlers(boolean allowCreate) {
          if (serviceHandlers == null) {
              if (allowCreate) {
                  serviceHandlers = new ConcurrentHashMap<String, Object>(3, 0.9f, 1);
              }
          }
          return serviceHandlers;
      }
docs: Return map of service handlers and optionally created it if it doesn't exist.
  
  @param allowCreate Should the map be created if it doesn't exist?
  @return Map of service handlers