public function get_sharevaluationoperationform()
 {
     $toReturn = collect();
     $operations = Operation::groupBy('to_share_id')->get();
     for ($i = 1; $i <= 10; $i++) {
         $row = collect();
         // date
         $date = '12/12/2015';
         $row->put('date', $date);
         // vehicle
         $vehicle = 'vehicle 1';
         $row->put('vehicle', $vehicle);
         // value
         $value = '56';
         $row->put('value', $value);
         $toReturn->push($row);
     }
     return $toReturn;
 }