gtk/menu_shell.go
func (v *MenuShell) Insert(child IMenuItem, position int) {
	C.gtk_menu_shell_insert(v.native(), child.toWidget(), C.gint(position))
}
func (v *MenuShell) Insert(child IMenuItem, position int) {
	C.gtk_menu_shell_insert(v.native(), child.toWidget(), C.gint(position))
}
// Insert is a wrapper around gtk_menu_shell_insert().