if (list.isEmpty()) {
            return null;
        }
        if (list.size() >= 2) {
            String msg = "The size of selected list is over 1: " + list.size();
            throw new FetchingOverSafetySizeException(msg, 1); // immediately caught by caller and translated
        }
        return list.get(0);
    }

    @Override

labels.search=Search
labels.similar_doc_result_status=Similar results are displayed.
labels.search_result_status=Results <b>{2}</b><span class="hidden-phone"> -</span> <b>{3}</b> of <b>{1}</b> for <b>{0}</b>
labels.search_result_status_over=Results <b>{2}</b><span class="hidden-phone"> -</span> <b>{3}</b> of about <b>{1}</b> for <b>{0}</b>
labels.search_result_time=({0} sec)
labels.prev_page=Prev
labels.next_page=Next

labels.search=Search
labels.similar_doc_result_status=Similar results are displayed.
labels.search_result_status=Results <b>{2}</b><span class="hidden-phone"> -</span> <b>{3}</b> of <b>{1}</b> for <b>{0}</b>
labels.search_result_status_over=Results <b>{2}</b><span class="hidden-phone"> -</span> <b>{3}</b> of about <b>{1}</b> for <b>{0}</b>
labels.search_result_time=({0} sec)
labels.prev_page=Prev
labels.next_page=Next

labels.menu_related_content=Related Content
labels.menu_related_query=Related Query
labels.menu_plugin=Plugin
labels.menu_storage=Storage
labels.similar_doc_result_status=Similar results are displayed.
labels.search_result_status_over=Results <b>{2}</b><span class="hidden-phone"> -</span> <b>{3}</b> of about <b>{1}</b> for <b>{0}</b>
labels.search_related_queries=Related Words:
labels.search_result_similar=Similar Results ({0})

d({bind:function(e,t,n){return this.on(e,null,t,n)},unbind:function(e,t){return this.off(e,null,t)},delegate:function(e,t,n,r){return this.on(t,e,n,r)},undelegate:function(e,t,n){return 1===arguments.length?this.off(e,"**"):this.off(t,e||"**",n)},hover:function(e,t){return this.mouseenter(e).mouseleave(t||e)}}),E.each("blur focus focusin focusout resize scroll click dblclick mousedown mouseup mousemove mouseover mouseout mouseenter mouseleave change select submit keydown keypress keyup contextmenu".split("...