foreach ($this->pixelColumns as $columnIndex => $columns) {
            $colDmns = $columns[0]->getDimensions();
            $colWidth = $colDmns->getInnerWidth();
            if (Math::comp($this->preferredWidths[$columnIndex], $colWidth) > 0) {
                $pixelNeeded[$columnIndex] = Math::sub($this->preferredWidths[$columnIndex], $colWidth);