public function totalRow($display = null)
    {
        $this->grid->addTotalRow($this->name, $display);

        return $this;
    }
public function totalRow($display = null)
    {
        $this->grid->addTotalRow($this->name, $display);

        return $this;
    }
public function totalRow ( $ display = null ) { $ this -> grid -> addTotalRow ( $ this -> name , $ display ) ; return $ this ; }
Add column to total-row.

@param null $display

@return $this
Add column to total - row .