gtk/gtk.go
func (v *TextBuffer) GetIterAtMark(mark *TextMark) *TextIter {
	var iter C.GtkTextIter
	C.gtk_text_buffer_get_iter_at_mark(v.native(), &iter, (*C.GtkTextMark)(mark))
	return (*TextIter)(&iter)
}
func (v *TextBuffer) GetIterAtMark(mark *TextMark) *TextIter {
	var iter C.GtkTextIter
	C.gtk_text_buffer_get_iter_at_mark(v.native(), &iter, (*C.GtkTextMark)(mark))
	return (*TextIter)(&iter)
}
// GetIterAtMark() is a wrapper around gtk_text_buffer_get_iter_at_mark().