/**
  * displays a section subheader
  *
  * note: the header is displayed by WP; this is only what would go under that
  */
 public function options_section($section)
 {
     $parts = explode('_', $section['id']);
     $name = Participants_db::make_anchor(end($parts));
     printf('<a id="%1$s" name="%1$s" class="%2$s" ></a>', $name, Participants_Db::$prefix . 'anchor');
     if (isset(self::$section_description[$name])) {
         printf('<div class="section-description" ><h4>%s</h4></div>', self::$section_description[$name]);
     }
 }