protected function setOrderBy(string $column, string $order = null): void
    {
        $orderBy = $column;

        if (null !== $order) {
            $orderBy .= ' ' . $order;
        }

        $this->orderBy[] = $orderBy;
    }
protected function setOrderBy(string $column, string $order = null): void
    {
        $orderBy = $column;

        if (null !== $order) {
            $orderBy .= ' ' . $order;
        }

        $this->orderBy[] = $orderBy;
    }
protected function setOrderBy ( string $ column , string $ order = null ) : void { $ orderBy = $ column ; if ( null !== $ order ) { $ orderBy .= ' ' . $ order ; } $ this -> orderBy [ ] = $ orderBy ; }
Set an order by condition.

@param string      $column
@param string|null $order

@return void
Set an order by condition .