private function completeSettlements($settlementIds, AppMailer $mailer)
 {
     //Load reports because its status will be changed in setAsCompplete
     $settlements = Settlement::find($settlementIds)->load('report', 'oweeUser', 'owedUser');
     foreach ($settlements as $settlement) {
         $settlement->setAsComplete();
         $mailer->sendSettlementConfirmation(\Auth::user(), $settlement);
     }
     session()->flash("message", "Settlement(s) completed");
 }