phpbb\install\helper\iohandler\iohandler_base::set_progress PHP Method

    public function set_progress($task_lang_key, $task_number)
    {
        $this->current_task_name = '';
        if (!empty($task_lang_key)) {
            $this->current_task_name = $this->language->lang($task_lang_key);
        }
        $this->current_task_progress = $task_number;
    }

 /**
  * {@inheritdoc}
  */
 public function set_progress($task_lang_key, $task_number)
 {
     parent::set_progress($task_lang_key, $task_number);
     $this->send_response();
 }