}

    /**
     * Sets the facet cache duration in seconds.
     *
     * @param facetCacheDuration the cache duration in seconds
     */
    public void setFacetCacheDuration(final long facetCacheDuration) {
        this.facetCacheDuration = facetCacheDuration;
    }

    /**
     * Hook class for customizing action processing.

        viewHelper.setOriginalHighlightTagPre("<mark>");
        viewHelper.setOriginalHighlightTagPost("</mark>");
        viewHelper.setCacheTemplateName("cache");
        viewHelper.setFacetCacheDuration(600L);
    }

    @Test
    public void test_TextFragment() {
        ViewHelper.TextFragment fragment = new ViewHelper.TextFragment("prefix", "start", "end", "suffix");