docs: @Override
      public CacheConfiguration<K, V> addCacheEntryListenerConfiguration(
              CacheEntryListenerConfiguration<K, V> cacheEntryListenerConfiguration) {
  
          checkNotNull(cacheEntryListenerConfiguration, "CacheEntryListenerConfiguration can't be null");
          if (!getListenerConfigurations().add(cacheEntryListenerConfiguration)) {
              throw new IllegalArgumentException("A CacheEntryListenerConfiguration can "
                      + "be registered only once");
          }
          return this;
      }