public function add(WaxModel $model)
 {
     $this->load();
     //reassigning so that changes in the model reflect correctly
     foreach ($this as $index => $row) {
         if ($row->{$model->primary_key} && $row->{$model->primary_key} == $model->pk()) {
             $reassign = $index;
         }
     }
     if ($reassign) {
         $this->rowset[$reassign] = new WaxModelProxy($model);
     } else {
         $this->rowset[] = new WaxModelProxy($model);
     }
 }