chosenbox not work in listbox (in listcell) with MVVM

throw exception org.zkoss.zk.ui.UiException: Listitem's parent must be Listbox, not <Chosenbox lC6Pi8>

{SAMPLE CODE BELOW}

ZUL page code as :-

<listcell >
<chosenbox model="@load(vm.entityMasterList)">
</chosenbox>
</listcell>

ViewModel code as :-
public ListModel getEntityMasterList()

{ return ListModels.toListSubModel(new ListModelList(entityMasterList),new CustomerSortComparator(),10); }

/**

• Class CustomerSortComparator
• @author Administrator
  *
  */
  class CustomerSortComparator implements Comparator<Object>
  Unknown macro: { public int compare(Object key, Object value) { String idx = Objects.toString(key); if (idx.isEmpty()) return 0; return idx != null && value != null && idx.length() > 0 && Objects.toString(((CtEntityMaster)value).getEntityCode().toUpperCase()).startsWith(idx.toUpperCase()) ? 0 : 1; } }