@Override
  public Map<String, String> toConfig(Config jobConfig) {
    Map<String, String> tableConfig = new HashMap<>(super.toConfig(jobConfig));
    addTableConfig(GUAVA_CACHE, SerdeUtils.serialize("Guava cache", cache), tableConfig);
    return Collections.unmodifiableMap(tableConfig);
  }
Specify a pre-configured Guava cache instance to be used for caching table.
@param cache Guava cache instance
@return this descriptor
samza-api/src/main/java/org/apache/samza/table/descriptors/GuavaCacheTableDescriptor.java