protected function extractSorting($config)
    {
        $sorting = $config->getSorting();

        $sortBy  = key($sorting);
        $sortDir = current($sorting) ?: DCGE::MODEL_SORTING_ASC;

        return array($sortBy, $sortDir);
    }
protected function extractSorting($config)
    {
        $sorting = $config->getSorting();

        $sortBy  = key($sorting);
        $sortDir = current($sorting) ?: DCGE::MODEL_SORTING_ASC;

        return array($sortBy, $sortDir);
    }
Extract the sorting from the given config.

@param ConfigInterface $config The configuration to be applied.

@return array