/**
  * @param BlackoutSeries $blackoutSeries
  * @return array|BlackoutItemView[]
  */
 private function GetConflictingBlackouts($blackoutSeries)
 {
     $conflictingBlackouts = array();
     $blackouts = $blackoutSeries->AllBlackouts();
     foreach ($blackouts as $blackout) {
         $existingBlackouts = $this->reservationViewRepository->GetBlackoutsWithin($blackout->Date());
         foreach ($existingBlackouts as $existingBlackout) {
             if ($existingBlackout->SeriesId == $blackoutSeries->Id()) {
                 continue;
             }
             if ($blackoutSeries->ContainsResource($existingBlackout->ResourceId) && $blackout->Date()->Overlaps($existingBlackout->Date)) {
                 $conflictingBlackouts[] = $existingBlackout;
             }
         }
     }
     return $conflictingBlackouts;
 }