Wt

using WAbstractTableModel::setHeaderData does cause the 2-argument version to be exposed in QueryModel, but default arguments to virtual functions have to be repeated if we want to use the 3-argument version.

Default arguments on virtual functions are a bad idea in general, and mixing overloading and inheritance can also be a world of pain, but we're stuck with it now.

This regression in Wt 4.5.1 was reported on the blog.