public void setKinds(final Kind[] kinds) {
        this.kinds = kinds;
    }

    /**
     * Sets the empty source map.
     * @param emptySource The empty source map to set.
     */
    public void setEmptySource(final Map<String, Object> emptySource) {
        this.emptySource = emptySource;
    }

    /**
     * Sets the ID of the suggest item.
     * @param id The ID to set.
     */

        // Take newer values from item2
        mergedItem.setTimestamp(item2.getTimestamp());
        mergedItem.setUserBoost(item2.getUserBoost());
        mergedItem.setEmptySource(item2.toEmptyMap());

        // Sum frequencies
        mergedItem.setQueryFreq(item1.getQueryFreq() + item2.getQueryFreq());
        mergedItem.setDocFreq(item1.getDocFreq() + item2.getDocFreq());