}

    /**
     * Sets the prefix used for highlight field names in search results.
     *
     * @param highlightPrefix the prefix string to use for highlight fields
     */
    public void setHighlightPrefix(final String highlightPrefix) {
        this.highlightPrefix = highlightPrefix;
    }

    /**
     * Gets the current highlight prefix used for highlight field names.
     *

        queryHelper.setAdditionalQuery("additional query");
        assertEquals("additional query", queryHelper.getAdditionalQuery());
    }

    public void test_setHighlightPrefix() {
        queryHelper.setHighlightPrefix("highlight_");
        assertEquals("highlight_", queryHelper.getHighlightPrefix());
    }

    public void test_getHighlightPrefix() {
        assertEquals("hl_", queryHelper.getHighlightPrefix());
    }