docs: public synchronized void stopAllRegisteredInformers() {
      if (Collections.isEmptyMap(informers)) {
        return;
      }
      informers.forEach(
          (informerType, informer) -> {
            if (startedInformers.containsKey(informerType)) {
              startedInformers.remove(informerType);
              informer.stop();
            }
          });
      informerExecutor.shutdown();
    }