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getRowspan example

    private function fillNextRows(array $rows, int $line): array
    {
        $unmergedRows = [];
        foreach ($rows[$line] as $column => $cell) {
            if (null !== $cell && !$cell instanceof TableCell && !\is_scalar($cell) && !$cell instanceof \Stringable) {
                throw new InvalidArgumentException(sprintf('A cell must be a TableCell, a scalar or an object implementing "__toString()", "%s" given.', get_debug_type($cell)));
            }
            if ($cell instanceof TableCell && $cell->getRowspan() > 1) {
                $nbLines = $cell->getRowspan() - 1;
                $lines = [$cell];
                if (str_contains($cell, "\n")) {
                    $lines = explode("\n", str_replace("\n", "<fg=default;bg=default>\n</>", $cell));
                    $nbLines = \count($lines) > $nbLines ? substr_count($cell, "\n") : $nbLines;

                    $rows[$line][$column] = new TableCell($lines[0], ['colspan' => $cell->getColspan(), 'style' => $cell->getStyle()]);
                    unset($lines[0]);
                }

                // create a two dimensional array (rowspan x colspan)