Loja::setConfig

 public static function setConfig($lojaId, $chave, $valor)
    {
        $config = self::loadConfig($lojaId);
        $conn   = self::getConnection();
        $query  = $conn->createQueryBuilder();
        if (!isset($config[$chave])) {
            $query->insert('lojas_configuracoes')->values([
                'chave'   => $query->createNamedParameter($chave),
                'valor'   => $query->createNamedParameter(serialize($valor)),
                'loja_id' => $query->createNamedParameter($lojaId)
            ])->execute();
        } else {
            $query
                ->update('lojas_configuracoes')
                ->set('valor', $query->createNamedParameter(serialize($valor)))
                ->where('chave=:chave AND loja_id=:loja_id')
                ->setParameter('chave', $chave)
                ->setParameter('loja_id', $lojaId)
                ->execute();
        }
    }