Inheritance: extends Illuminate\Database\Eloquent\Model
 /**
  * Delete summary
  *
  * @param  integer $id
  * @param  integer $summaryId
  *
  * @return view
  */
 public function deleteSummary($id, $summaryId)
 {
     $summary = Summary::find($summaryId);
     if ($summary->user_id == Auth::user()->id) {
         $summary->delete();
     }
     Session::flash('flash_success', trans('crm-launcher::success.summary_deleted'));
     return back();
 }