prevPage method
Go previous page and refresh data
Implementation
void prevPage({bool noRefresh = false}) {
  if (_data.page <= 1) return;
  _data.page = _data.page - 1;
  notifyListeners();
  if (noRefresh) return;
  refresh();
}Go previous page and refresh data
void prevPage({bool noRefresh = false}) {
  if (_data.page <= 1) return;
  _data.page = _data.page - 1;
  notifyListeners();
  if (noRefresh) return;
  refresh();
}