getSelectedIndices method
Gets the selected indices as a sorted list.
If nothing is selected and fallbackIndex is provided,
returns a list with just that index.
Implementation
List<int> getSelectedIndices({int? fallbackIndex}) {
if (_selected.isEmpty) {
if (fallbackIndex != null) {
return [fallbackIndex];
}
return [];
}
return _selected.toList()..sort();
}