public static function generate_css($atts, $widget_number = null)
{
$atts['subtype'] = 'css';
$css = apply_filters('tw_cache_get', false, $atts);
if (false === $css) {
$css = self::get_testimonials_html_css($atts, $widget_number);
$css = apply_filters('tw_cache_set', $css, $atts);
}
if (!empty($css)) {
self::$css = array_merge($css, self::$css);
add_action('wp_footer', array(__CLASS__, 'get_testimonials_css'), 20);
}
}
