protected function combineFiles()
    {
        if (Director::isDev() && $this->owner->config()->combine_files) {
            
            // Obtain Tools:
            
            $tools = ViewTools::singleton();
            
            // Combine Files:
            
            $tools->combineFiles($this->owner->config()->combined_js,  $this->owner->getRequiredJSFiles());
            $tools->combineFiles($this->owner->config()->combined_css, $this->owner->getRequiredCSSFiles());
            
        }
    }