/**
  * @param string $plugintype Plugin type (always 'theme')
  * @param string $pluginname Plugin name (name of theme)
  * @param backup_optigroup $optigroup Group that will contain this data
  * @param backup_course_structure_step $step Backup step that this is part of
  */
 public function __construct($plugintype, $pluginname, $optigroup, $step)
 {
     parent::__construct($plugintype, $pluginname, $optigroup, $step);
     $this->coursetheme = backup_plan_dbops::get_theme_from_courseid($this->task->get_courseid());
 }