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