public function refreshColumnDimensions()
    {
        $currentColumnDimensions = $this->getColumnDimensions();
        $newColumnDimensions = array();

        foreach ($currentColumnDimensions as $objColumnDimension) {
            $newColumnDimensions[$objColumnDimension->getColumnIndex()] = $objColumnDimension;
        }

        $this->columnDimensions = $newColumnDimensions;

        return $this;
    }