src/Resources/contao/classes/Grid16Layout.php
public function addGrid16CSS(\PageModel $objPage, \LayoutModel $objLayout, \PageRegular $objPageRegular)
    {
        /*
         * vor internen laden
         * $GLOBALS['TL_CSS'][]  = 'assets/contao-grid16/css/grid-1120-16-pixel.min.css';
         * nach den anderen
         * $GLOBALS['TL_HEAD'][] = '<link ...>';
         */      
        
        $arrFrameworkGrid16 = \StringUtil::deserialize($objLayout->frameworkGrid16);
        
        // Add the Grid16 CSS framework style sheets
        if (is_array($arrFrameworkGrid16))
        {
            foreach ($arrFrameworkGrid16 as $strFile)
            {
                if ($objLayout->loadingOrderGrid16 == 'before_framework') 
                {
                    $GLOBALS['TL_CSS'][] = 'bundles/bugbustergrid16/' . basename($strFile, '.css') . '.min.css';
                }
                else 
                {
                    $GLOBALS['TL_HEAD'][] = '<link rel="stylesheet" href="bundles/bugbustergrid16/' . basename($strFile, '.css') . '.min.css">';
                }
                
            }
        }
        
        return;
    }
public function addGrid16CSS(\PageModel $objPage, \LayoutModel $objLayout, \PageRegular $objPageRegular)
    {
        /*
         * vor internen laden
         * $GLOBALS['TL_CSS'][]  = 'assets/contao-grid16/css/grid-1120-16-pixel.min.css';
         * nach den anderen
         * $GLOBALS['TL_HEAD'][] = '<link ...>';
         */      
        
        $arrFrameworkGrid16 = \StringUtil::deserialize($objLayout->frameworkGrid16);
        
        // Add the Grid16 CSS framework style sheets
        if (is_array($arrFrameworkGrid16))
        {
            foreach ($arrFrameworkGrid16 as $strFile)
            {
                if ($objLayout->loadingOrderGrid16 == 'before_framework') 
                {
                    $GLOBALS['TL_CSS'][] = 'bundles/bugbustergrid16/' . basename($strFile, '.css') . '.min.css';
                }
                else 
                {
                    $GLOBALS['TL_HEAD'][] = '<link rel="stylesheet" href="bundles/bugbustergrid16/' . basename($strFile, '.css') . '.min.css">';
                }
                
            }
        }
        
        return;
    }
Hook loadDataContainer, add Grid16 CSS

@param PageModel   $objPage
@param LayoutModel $objLayout
@param PageRegular $objPageRegular