kernel/lib/Asset.php
public function stylesheets() : array {
	    
	    $sDefaultPath = 'http://'.$_SERVER['HTTP_HOST'].'/getCss?';
	    $aCss = func_get_args();
	    $aReturns = array();
	    
	    foreach($aCss as $aCssCombination) {
	        
	        $sCssPath = $sDefaultPath;
	        
	        foreach ($aCssCombination as $sCssToAdd) {
	            
	            $sCssPath = $sCssToAdd.'&';
	        }
	    
    	    if (defined('ASSET_VERSION') && ASSET_VERSION) {

                $sCssPath = ASSET_VERSION;
    	    }
	        
	        $aReturns[] = $sCssPath;
	    }
	    
	    return $aReturns;
	}
public function stylesheets() : array {
	    
	    $sDefaultPath = 'http://'.$_SERVER['HTTP_HOST'].'/getCss?';
	    $aCss = func_get_args();
	    $aReturns = array();
	    
	    foreach($aCss as $aCssCombination) {
	        
	        $sCssPath = $sDefaultPath;
	        
	        foreach ($aCssCombination as $sCssToAdd) {
	            
	            $sCssPath = $sCssToAdd.'&';
	        }
	    
    	    if (defined('ASSET_VERSION') && ASSET_VERSION) {

                $sCssPath = ASSET_VERSION;
    	    }
	        
	        $aReturns[] = $sCssPath;
	    }
	    
	    return $aReturns;
	}
get URL of your javascripts

@access public
@return array
@internal param array $aCss [many can be passed]

@tutoriel