Indatus\Ranger\ApiDatabase\QueryBuilding\ApiQueryBuilder::checkBuilderType PHP Method

    protected function checkBuilderType($builder)
    {
        //keeps clients from setting the builder to anything that isn't an Eloquent
        //Builder or an Model
        if (!$builder instanceof Builder && !$builder instanceof Model) {
            throw new Exception('builder must be instance of Illuminate\\Database\\Eloquent\\Model or Illuminate\\Database\\Eloquent\\Builder');
        }
    }