public function count($siteId, $language)
    {
        $qa = $this->createAggregationQueryBuilderWithSiteIdAndLanguage($siteId, $language);
        $qa->match(array('deleted' => false));
        $elementName = 'node';
        $qa->sort(array('createdAt' => 1));
        $qa->group(array(
            '_id' => array('nodeId' => '$nodeId'),
            $elementName => array('$last' => '$$ROOT')
        ));

        return $this->countDocumentAggregateQuery($qa);
    }
public function count($siteId, $language)
    {
        $qa = $this->createAggregationQueryBuilderWithSiteIdAndLanguage($siteId, $language);
        $qa->match(array('deleted' => false));
        $elementName = 'node';
        $qa->sort(array('createdAt' => 1));
        $qa->group(array(
            '_id' => array('nodeId' => '$nodeId'),
            $elementName => array('$last' => '$$ROOT')
        ));

        return $this->countDocumentAggregateQuery($qa);
    }
@param string  $siteId
@param string  $language

@return int