public function getThumbnail($fullImageTag = true)
    {
        $app = Application::getFacadeApplication();
        $config = $app->make('config');
        $type = ThumbnailType::getByHandle($config->get('concrete.icons.file_manager_listing.handle'));
        if (file_exists(DIR_AL_ICONS . '/' . $this->getExtension() . '.svg')) {
            $url = REL_DIR_AL_ICONS . '/' . $this->getExtension() . '.svg';
        } else {
            $url = AL_ICON_DEFAULT;
        }
        if ($fullImageTag == true) {
            return sprintf(
                '<img src="%s" width="%s" height="%s" class="img-responsive ccm-generic-thumbnail" alt="%s">',
                $url,
                $type->getWidth(),
                $type->getHeight(),
                t(/* i18n: %s is a file type */ '%s file icon', mb_strtoupper($this->getExtension()))
            );
        } else {
            return $url;
        }
    }