p：pickList和Omnifaces转换器问题

Question

我对素数p：pickList以及与o：converter结合使用有疑问

我已经设置了ManagedBean和JSF页面

@ViewScoped
@Named
public class FormDesignerEditController implements Serializable {

    private DualListModel<FormComponentElement> formComponentElementList;
    private FormComponentElement selectedFormComponentElement;

    private List<FormComponentElement> targetAllList = new ArrayList<FormComponentElement>();
    private List<FormComponentElement> sourceList = new ArrayList<FormComponentElement>();
    private List<FormComponentElement> targetList = new ArrayList<FormComponentElement>();

    @PostConstruct
    public void init() {

        formComponentElementList = new DualListModel<FormComponentElement>();

        // Source
        sourceList = new ArrayList<FormComponentElement>();
        sourceList = formDesignerService.createAvailableFormElements();

        // Target
        targetList = new ArrayList<FormComponentElement>();
        targetAllList = formDesignerService.createFormSettingsElements();

        // Set List
        formComponentElementList.setSource(targetList);
        formComponentElementList.setTarget(sourceList);

    }

以下是选择列表：https://pastebin.com/XcAj3guj