Cannot mock final SortableDataProvider.getSortState

[Eric J. Van der Velden]

Hello,

SortableDataProvider, in
package org.apache.wicket.extensions.markup.html.repeater.util, has a final
method getSortState().

I cannot mock this method.

I have copied SortableDataProvider under a different name, and subclassed
this one,but I do not like this.

The same happens with final LoadableDetachableModel.getObject(), but in
this case I could mock LoadableDetachableModel.load().

So why are these methods final, and how do programmers test the provider?

Thank you!