Neomerx\JsonApi\Contracts\Encoder\Parameters\SortParameterInterface::isAscending PHP Метод

    public function isAscending();

 /**
  * @param Builder $builder
  * @param SortParameterInterface $param
  */
 protected function sortBy(Builder $builder, SortParameterInterface $param)
 {
     $column = $this->getQualifiedSortColumn($builder, $param->getField());
     $order = $param->isAscending() ? 'asc' : 'desc';
     $builder->orderBy($column, $order);
 }