pdfmake RTL

i did all steps described in
https://datatables.net/forums/discussion/62113/how-to-reverse-excel-pdf-columns-order-to-rtl#latest
but not worked for me as i attashed to you

i did it as discribed

columnDefs: [
{
targets: '_all',
render: function(data, type, row) {
if (type === 'PDF') {
return data.split(' ').reverse().join(' ');
}
return data;
}
}

but not worked for me