/**
  * @param \Phalcon\Mvc\Model\Query\Builder $builder
  * @param $params
  */
 private static function setColumns($builder, $params)
 {
     $columns = \PPA\Rest\Utils\Params::getColumns($params);
     $excludeColumns = \PPA\Rest\Utils\Params::getExcludeColumns($params);
     if ($columns) {
         $builder->columns($columns);
     }
     if ($excludeColumns) {
         self::setExcludeColumns($builder, $excludeColumns);
     }
 }