code: public function countNotDeletedByLanguage($contentId, $language)
      {
          $qa = $this->createAggregationQueryWithLanguage($language);
          $qa->match(
              array(
                  'contentId' => $contentId,
                  'deleted'   => false,
              )
          );
  
          return $this->countDocumentAggregateQuery($qa);
      }
docs: @param string $contentId
  @param string $language
  
  @return array