public function deleteSeries(int $seriesId) : bool
{
$this->db->beginTransaction();
$this->db->delete('hull_blog_series_items', ['parent' => $seriesId]);
$this->db->delete('hull_blog_series_items', ['series' => $seriesId]);
$this->db->delete('hull_blog_series', ['seriesid' => $seriesId]);
\Airship\clear_cache();
return $this->db->commit();
}