public function run()
{
// retrieve all pending page workflow progresses
$list = PageProgress::getPendingWorkflowProgressList();
$r = $list->get();
foreach ($r as $w) {
$wp = $w->getWorkflowProgressObject();
$wo = $wp->getWorkflowObject();
if ($wo instanceof EmptyWorkflow) {
$wp->delete();
}
}
}
