private function getVersionList()
    {
        /* @var \Concrete\Core\Form\Service\Widget\DateTime $dt */
        $dt = $this->app->make('helper/form/date_time');

        $startDate = $dt->translate('startDate', null, true);
        $endDate = $dt->translate('endDate', null, true);

        $versionList = new GlobalVersionList();
        $versionList->sortByDateApprovedDesc();

        if ($startDate !== null) {
            $versionList->filterByApprovedAfter($startDate);
        }

        if ($endDate !== null) {
            $versionList->filterByApprovedBefore($endDate);
        }

        return $versionList;
    }