/**
     * The web configuration ID associated with this request header.
     */
    public String webConfigId;

    /**
     * The user who created this request header.
     */
    public String createdBy;

    /**
     * The timestamp when this request header was created.
     */
    public String createdTime;

    /**
     * The version number for optimistic locking.
     */
    public String versionNo;

      "index" : {
        "creation_date" : "1509021050413",
        "number_of_shards" : "5",
        "number_of_replicas" : "1",
        "uuid" : "Oh0_KGaLRLGjpIm2zjB83Q",
        "version" : {
          "created" : "6000051"
        },
        "provided_name" : "fess_config.crawling_info"
      }
    }
  }

      return this;
    }

    /**
     * Returns a newly-created {@code ImmutableList} based on the contents of the {@code Builder}.
     */
    @Override
    public ImmutableList<E> build() {
      forceCopy = true;
      return asImmutableList(contents, size);
    }

    /**
     * Returns a newly-created {@code ImmutableList} based on the contents of the {@code Builder},

 *   <li>notification of evicted (or otherwise removed) entries
 *   <li>accumulation of cache access statistics
 * </ul>
 *
 * <p>These features are all optional; caches can be created using all or none of them. By default,
 * cache instances created by {@code CacheBuilder} will not perform any type of eviction.
 *
 * <p>Usage example:
 *
 * {@snippet :
 * LoadingCache<Key, Graph> graphs = CacheBuilder.newBuilder()

      "index" : {
        "creation_date" : "1509021060038",
        "number_of_shards" : "5",
        "number_of_replicas" : "1",
        "uuid" : "LRohRohXTCGxGdsabXPNnQ",
        "version" : {
          "created" : "6000051"
        },
        "provided_name" : "fess_log.favorite_log"
      }
    }
  }

      "index" : {
        "creation_date" : "1509021056434",
        "number_of_shards" : "5",
        "number_of_replicas" : "1",
        "uuid" : "Zrp1Be7PS1ySzKAjlrpICg",
        "version" : {
          "created" : "6000051"
        },
        "provided_name" : "fess_config.request_header"
      }
    }
  }

      "index" : {
        "creation_date" : "1509021049746",
        "number_of_shards" : "5",
        "number_of_replicas" : "1",
        "uuid" : "0xToIxg0R1KjZqA0ynv9PQ",
        "version" : {
          "created" : "6000051"
        },
        "provided_name" : "fess_config.bad_word"
      }
    }
  }

      "index" : {
        "creation_date" : "1509021057304",
        "number_of_shards" : "5",
        "number_of_replicas" : "1",
        "uuid" : "gofu2g1ATH6L2rVweOWmtg",
        "version" : {
          "created" : "6000051"
        },
        "provided_name" : "fess_config.thumbnail_queue"
      }
    }
  }

    @Required
    @Size(max = 1000)
    public String fileConfigId;

    /** The user who created this file authentication configuration (maximum 1000 characters). */
    @Size(max = 1000)
    public String createdBy;

    /** The timestamp when this file authentication configuration was created. */
    @ValidateTypeFailure
    public Long createdTime;

    /**

     */
    @Required
    @Size(max = 1000)
    public String webConfigId;

    /**
     * The user who created this authentication configuration.
     */
    @Size(max = 1000)
    public String createdBy;

    /**
     * The timestamp when this authentication configuration was created.
     */
    @ValidateTypeFailure
    public Long createdTime;

    /**