public function setBlockTypeDisplayOrder(BlockTypeEntity $bt, $displayOrder)
    {
        $app = Application::getFacadeApplication();
        $db = $app->make(Connection::class);
        $db->update(
            'BlockTypeSetBlockTypes',
            ['displayOrder' => $displayOrder],
            ['btID' => $bt->getBlockTypeID(), 'btsID' => $this->getBlockTypeSetID()]
        );
    }