code: public function findOnePublished($contentId, $language, $siteId)
      {
          $qa = $this->createAggregationQueryWithLanguageAndPublished($language);
          $filter['contentId'] = $contentId;
          $qa->match($filter);
  
          return $this->singleHydrateAggregateQuery($qa);
      }
docs: @param string $contentId
  @param string $language
  @param string $siteId
  
  @return ContentInterface