/** The key of the configuration. e.g. 10 */
    String SUGGEST_POPULAR_WORD_QUERY_FREQ = "suggest.popular.word.query.freq";

    /** The key of the configuration. e.g. 1 */
    String SUGGEST_MIN_HIT_COUNT = "suggest.min.hit.count";

    /** The key of the configuration. e.g. _default */
    String SUGGEST_FIELD_CONTENTS = "suggest.field.contents";

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