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Número dinâmico de dropdowns Java Wicket


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Estou a tentar criar várias dropdown na framework Wicket, mas não sei como implementar um numeor dinâmico de dropdowns porque na view só defino uma...

add(new DropDownChoice("authors",
				 new PropertyModel(author, "name"),
				 similiarAuthors, new IChoiceRenderer() {
					 public Object getDisplayValue(Object t) {
						 return t.toString();
					 public String getIdValue(Object t, int i) {
						 if (i < 0) {
							 i = 0;
						 return String.valueOf(similiarAuthors.get(i).getId());

este pequeno snippet é suposto ser utilizado dentro de um loop para criar dinâmicamente dropdown com informação da lista similiarAuthors.

Eu não estou a conseguir porque apenas consigo definir na View uma dropdown de cada vez:

		 <div wicket:id="label_selectBox"/>
			 <select wicket:id="authors"/>	
Edited by RicardoCostaTW
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Descobri uma forma usando fragments.

código da view:

<wicket:fragment wicket:id="fragment1">
			    <select wicket:id="authors"/>

Código do model:

Loop loop = new Loop("list", dropDowns.size()) {
	    protected void populateItem(LoopItem li) {

		    int index = li.getIndex()+1;

		    String fragmentId = "fragment1";
		    li.add(new Fragment1("panel", fragmentId, dropDowns, index));


public class Fragment1 extends Fragment {
    public Fragment1(String id, String markupId, List<DropDownChoice> dropDowns, int index) {
	    super(id, markupId, MixBook.this);
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