protected function parseThemes()
    {
        foreach ($this->themesDirs as $dir) {
            $absDir = $this->fileLocator->locate($dir);
            $finder = Finder::create()->files()->in($absDir)->name('*.css');
            foreach ($finder as $file) {
                $this->addTheme($file->getBasename('.css'), $file->getPathname());
            }
        }
        #save to cache if env prod
        if ($this->env == 'prod') {
            $this->cacheDriver->save(static::CACHE_THEMES_NAME, $this->getThemes());
        }
    }