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