Space between rows not working

[Sebuahhobi]

Space between rows not working

I need nothing space between rows.
I was set spaceBetweenRows = 1, burt not work.

My code:
`
List bytes = [];
final generator = Generator(paper, profile, spaceBetweenRows: 1);
bytes += generator.setGlobalFont(PosFontType.fontB);

  bytes += generator.text('** $namaToko **', styles: const PosStyles(bold: true, align: PosAlign.center));
  bytes += generator.text('${data.dateCreate} ${data.timeCreate}', styles: const PosStyles(align: PosAlign.left));
  bytes += generator.feed(2);
  bytes += generator.text('STRUK PEMBELIAN', styles: const PosStyles(bold: false, align: PosAlign.center));

  bytes += generator.row([
    PosColumn(
      text: 'NO RESI',
      width: 3,
      styles: const PosStyles(
        fontType: PosFontType.fontB,
      ),
    ),
    PosColumn(
      text: ':',
      width: 1,
      styles: const PosStyles(
        fontType: PosFontType.fontB,
      ),
    ),
    PosColumn(
      text: data.transaksiID,
      width: 8,
      styles: const PosStyles(
        fontType: PosFontType.fontB,
      ),
    ),
  ]);
  bytes += generator.row([
    PosColumn(
      text: 'NOMOR TUJUAN',
      width: 3,
      styles: const PosStyles(
        fontType: PosFontType.fontB,
      ),
    ),
    PosColumn(
      text: ':',
      width: 1,
      styles: const PosStyles(
        fontType: PosFontType.fontB,
      ),
    ),
    PosColumn(
      text: data.nomorTujuan,
      width: 8,
      styles: const PosStyles(
        fontType: PosFontType.fontB,
      ),
    ),
  ]);
  bytes += generator.text('NO RESI : ${data.transaksiID}', styles: const PosStyles(bold: false, align: PosAlign.left, fontType: PosFontType.fontB));
  bytes += generator.text('NOMOR TUJUAN : ${data.nomorTujuan}', styles: const PosStyles(bold: false, align: PosAlign.left, fontType: PosFontType.fontB));
  bytes += generator.feed(5);
  return bytes;

`

I saw an example of a drawing that could be tight with no space between the rows. How do you do that?