TreePanel#onInitialize() is not being called from AbstractGridRow#onBeforeRender(). - WicketStuff-wicket7

[durairaj t]

I'm upgrading wicketstuff from wicket 5 to 7, one of the TreePanel
functionality is not working.

 it was TreePanel#onBeforeRender() in wicket5 and AbstractGridRow
#onBeforeRender().

Component component = get(column.getId()); returns BaseTreeColumn object
with the null child object  in AbstractGridRow#onRender(). it should have
child objects[junctionLink,nodeComponent,icon].


 any help?