/**
  * [[@doctodo method_description:isPassedDue]].
  *
  * @return [[@doctodo return_type:isPassedDue]] [[@doctodo return_description:isPassedDue]]
  */
 public function isPassedDue()
 {
     if (empty($this->end)) {
         return false;
     }
     $dueDate = DateHelper::endOfDay($this->end);
     return DateHelper::inPast($dueDate);
 }