/** The key of the configuration. e.g.  */
    String search_engine_PASSWORD = "search_engine.password";

    /** The key of the configuration. e.g. 10000 */
    String search_engine_heartbeat_interval = "search_engine.heartbeat_interval";

    /** The key of the configuration. e.g. aes */
    String APP_CIPHER_ALGORISM = "app.cipher.algorism";

    /** The key of the configuration. e.g. ___change__me___ */