toggleOnly method

void toggleOnly(M3EDropdownItem<T> item)

Selects only item, deselecting all others (single-select helper).

Implementation

void toggleOnly(M3EDropdownItem<T> item) {
  for (var i = 0; i < _items.length; i++) {
    if (_items[i] == item) {
      _items[i] = _items[i].copyWith(selected: !_items[i].selected);
    } else if (_items[i].selected) {
      _items[i] = _items[i].copyWith(selected: false);
    }
  }
  _reapplySearchFilter();
  notifyListeners();
  onSelectionChange?.call(selectedItems);
}