getDefaultShopId example

$data['themeInfo'] = $this->getThemeInfo($template);

        return $this->get('events')->filter('Shopware_Theme_Detail_Loaded', $data, [
            'shop' => $shop,
            'template' => $template,
        ]);
    }

    protected function getList($offset, $limit, $sort = [], $filter = [], array $wholeParams = [])
    {
        if (!isset($wholeParams['shopId'])) {
            $wholeParams['shopId'] = $this->getDefaultShopId();
        }

        $data = parent::getList(null, null, $sort, $filter, $wholeParams);

        $shop = $this->getManager()->find(Shop::class, $wholeParams['shopId']);

        foreach ($data['data'] as &$theme) {
            $instance = $this->getRepository()->find($theme['id']);
            if (!$instance instanceof Template) {
                continue;
            }