static public function getNamespaces($type=null)
	{
	    static::initNamespace();
	    
	    if ($type) {
	        $nss = [];
	        foreach (static::$namespaces as $k => $v) {
	            $nss[$k] = $v . ucfirst($type) . '\\';
	        }
	        return $nss;
	    } else {
	        return static::$namespaces;
	    }
	}