gtk/text_view.go
func (v *TextView) GetLineAtY(y int) (*TextIter, int) {
	var iter TextIter
	var line_top C.gint
	iiter := (C.GtkTextIter)(iter)
	C.gtk_text_view_get_line_at_y(v.native(), &iiter, C.gint(y), &line_top)
	return &iter, int(line_top)
}
func (v *TextView) GetLineAtY(y int) (*TextIter, int) {
	var iter TextIter
	var line_top C.gint
	iiter := (C.GtkTextIter)(iter)
	C.gtk_text_view_get_line_at_y(v.native(), &iiter, C.gint(y), &line_top)
	return &iter, int(line_top)
}
// GetLineAtY is a wrapper around gtk_text_view_get_line_at_y().