static function add_actions()
 {
     add_action('delete_post', function ($post_id) {
         $post = get_post($post_id);
         $image_types = array('image/jpeg', 'image/png', 'image/gif', 'image/jpg');
         if ($post->post_type == 'attachment' && in_array($post->post_mime_type, $image_types)) {
             TimberImageHelper::delete_resized_files_from_url($post->guid);
             TimberImageHelper::delete_letterboxed_files_from_url($post->guid);
         }
     });
 }