/**
  * Returns all version data for the given $contentId
  *
  * @param mixed $contentId
  *
  * @return string[][]
  */
 public function listVersions($contentId)
 {
     $query = $this->queryBuilder->createVersionInfoFindQuery();
     $query->where($query->expr->eq($this->dbHandler->quoteColumn('contentobject_id', 'ezcontentobject_version'), $query->bindValue($contentId, null, \PDO::PARAM_INT)));
     return $this->listVersionsHelper($query);
 }