NilPortugues\Sql\QueryBuilder\Manipulation\Select::groupBy PHP Метод

    public function groupBy(array $columns)
    {
        $this->groupBy = $columns;
        return $this;
    }

 /**
  * @param string[] $columns
  *
  * @return Select
  */
 public function groupBy(array $columns)
 {
     return $this->select->groupBy($columns);
 }