showRange method
Shows or hides rows and columns in the given range. TRUE by default.
Workbook workbook = new Workbook();
Worksheet sheet = workbook.worksheets[0];
Range range = sheet.getRangeByName('A1:A2');
range.showRange(false);
List<int> bytes = workbook.saveAsStream();
File('Number.xlsx').writeAsBytes(bytes);
workbook.dispose();
Implementation
void showRange(bool? isVisible) {
showRows(isVisible);
showColumns(isVisible);
}