public function getAdditionalInformation()
    {
        $site = $this->getSite();
        if (is_null($site)) {
            return 'Invalid site configuration for scheduler please re-create the task!';
        }

        $information = 'Site: ' . $this->getSite()->getLabel();
        if (!empty($this->indexingConfigurationsToReIndex)) {
            $information .= ', Indexing Configurations: ' . implode(', ',
                    $this->indexingConfigurationsToReIndex);
        }

        return $information;
    }