Sets the current name in the file selector, as if entered by the user.
Note that the name passed in here is a UTF-8 string rather than a filename. This function is meant for such uses as a suggested name in a
“Save As...” dialog. You can pass “Untitled.doc” or a similarly suitable suggestion for the
If you want to preselect a particular existing file, you should use [method@Gtk.FileChooser.set_file] instead.
Please see the documentation for those functions for an example of using [method@Gtk.FileChooser.set_current_name] as well.
the filename to use, as a UTF-8 string