GTK C++ API: How to create a StringSorter with descending order?

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1

I’m using a StringSorter object to sort a list of filenames. From the output I’m getting, looks like this sorter object sorts the filename objects in an ascending order. But now, I want to sort the items in a descending order. How can I do that?

I was looking at the class reference for StringSorter and I was unable to find something that tells me how can I sort the items in a descending order.

https://gnome.pages.gitlab.gnome.org/gtkmm/classGtk_1_1StringSorter.html

2

Here is an example to demonstrate the StringSorter class:
GtkColumnViewDemo