public function deleteObjectWordsLink($contentId)
{
$query = $this->dbHandler->createDeleteQuery();
$query->deleteFrom($this->dbHandler->quoteTable('ezsearch_object_word_link'))->where($query->expr->eq($this->dbHandler->quoteColumn('contentobject_id'), ':contentId'));
$stmt = $query->prepare();
$stmt->execute(['contentId' => $contentId]);
}