I am looking to build a 1-2 level left navigation where the first level is a
list of categories and the 2nd is a list of optional sub categories. 


I have tried various ways of designing this in wicket such as a DataView for
level 1 and another DataView for level 2 which is inside a wicket enclosure.
The problem I encountered here is that level 2 component already exists when
it come to outputting the 2nd item in level 1.


Any thoughts on design or an example (as I have yet been unable to find one)
would be greatly appreciated.





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