protected function checkSettings()
    {
        if (empty($this->settings['additional']['detailPid'])) {
            $this->settings['additional']['detailPid'] = $GLOBALS['TSFE']->id;
        }

        if (empty($this->settings['additional']['listPid'])) {
            $this->settings['additional']['listPid'] = $GLOBALS['TSFE']->id;
        }

        if (empty($this->settings['associationID'])) {
            $this->addFlashMessage(
          'Please set a association',
          'Configuration Error',
          FlashMessage::ERROR
        );
        }
    }