sGetAmountArticles example

    public function sGetAmountRestrictedArticles($articles, $supplier)
    {
        if (!\is_array($articles) && empty($supplier)) {
            return $this->sGetAmountArticles();
        }

        $extraConditions = [];
        if (!empty($articles) && \is_array($articles)) {
            $extraConditions[] = $this->db->quoteInto('ordernumber IN (?) ', $articles);
        }
        if (!empty($supplier)) {
            $extraConditions[] = $this->db->quoteInto('s_articles.supplierID = ?', $supplier);
        }

        if (\count($extraConditions)) {