this.docFreq = docFreq;
    }

    /**
     * Sets the user boost of the suggest item.
     * @param userBoost The user boost to set.
     */
    public void setUserBoost(final float userBoost) {
        this.userBoost = userBoost;
    }

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

        // Merge kinds
        mergedItem.setKinds(mergeKinds(item1.getKinds(), item2.getKinds()));

        // 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());

        item.setFields(fields.toArray(new String[fields.size()]));
        item.setDocFreq(docFreq);
        item.setQueryFreq(queryFreq);
        item.setUserBoost(userBoost);
        item.setTags(tags.toArray(new String[tags.size()]));
        item.setRoles(roles.toArray(new String[roles.size()]));
        item.setLanguages(languages.toArray(new String[languages.size()]));

        assertEquals(200L, item.getQueryFreq());

        // Test document frequency
        item.setDocFreq(150L);
        assertEquals(150L, item.getDocFreq());

        // Test user boost
        item.setUserBoost(2.0f);
        assertEquals(2.0f, item.getUserBoost(), 0.001f);

        // Test readings
        String[][] newReadings = { { "read1", "read2" }, { "read3" } };
        item.setReadings(newReadings);