App\Repositories\AuditRepository::model PHP Method

    public function model()
    {
        return 'App\\Models\\Audit';
    }

 public function purge()
 {
     Audit::log(Auth::user()->id, trans('admin/audit/general.audit-log.category'), trans('admin/audit/general.audit-log.msg-purge'));
     $purge_retention = config('audit.purge_retention');
     $purge_date = (new \DateTime())->modify("- {$purge_retention} day");
     $auditsToDelete = $this->audit->pushCriteria(new AuditCreatedBefore($purge_date))->all();
     foreach ($auditsToDelete as $audit) {
         // The AuditRepository located at $this->audit is changed to a instance of the
         // QueryBuilder when we run a query as done above. So we had to revert to some
         // Magic to get a handle of the model...
         //            $this->audit->delete($audit->id);
         $this->app->make($this->audit->model())->destroy($audit->id);
     }
     return \Redirect::route('admin.audit.index');
 }