gtk/gtk.go
func (v *FileChooser) SetFilter(filter *FileFilter) {
	C.gtk_file_chooser_set_filter(v.native(), filter.native())
}
func (v *FileChooser) SetFilter(filter *FileFilter) {
	C.gtk_file_chooser_set_filter(v.native(), filter.native())
}
// SetFilter is a wrapper around gtk_file_chooser_set_filter().