docs: public CacheSimpleConfig setCacheLoaderFactory(String cacheLoaderFactory) {
          if (cacheLoader != null && cacheLoaderFactory != null) {
              throw new IllegalStateException("Cannot set cacheLoaderFactory to '" + cacheLoaderFactory
                      + "', because cacheLoader is already set to '" + cacheLoader + "'.");
          }
          this.cacheLoaderFactory = cacheLoaderFactory;
          return this;
      }