public function updateBlockTypeSetHandle($btsHandle)
    {
        $btsHandle = (string) $btsHandle;
        $app = Application::getFacadeApplication();
        $db = $app->make(Connection::class);
        $db->update('BlockTypeSets', ['btsHandle' => $btsHandle], ['btsID' => $this->getBlockTypeSetID()]);
        $this->btsHandle = $btsHandle;
    }