public SimpleItemListModel<T> setChoiceMode(final ChoiceMode choiceMode) {
        if (choiceMode != null) {
            this.choiceMode = choiceMode;
            pruneSelected();
            triggerChange(ChangeType.COMPLETE);
        }
        return this;
    }
Sets the (visual) choice mode to use. For single-choice modes, the model ensures that max.
 one item is selected at any time.
main/src/main/java/cgeo/geocaching/ui/SimpleItemListModel.java