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IPageLink has been removed because it was superseded by IPageProvider. Its last usage has been removed from InlineFrame
org.apache.wicket.markup.html.form.EnumChoiceRenderer#postprocess() is removed WICKET-5470
WICKET-5470 shown that org.apache.wicket.markup.html.form.EnumChoiceRenderer#postprocess() is not really needed and the same can be achieved by overriding #getDisplayValue() method and doing the processing after calling super.getDisplayValue().
Additionally now the specialization of EnumChoiceRenderer can provide completely custom implementation of #getDisplayValue().
Using keyboard UP and DOWN keys will loop thru the AutoCompleter's options WICKET-5275
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