gtk/actionbar_since_3_12.go
func (a *ActionBar) PackStart(child IWidget) {
	C.gtk_action_bar_pack_start(a.native(), child.toWidget())
}
func (a *ActionBar) PackStart(child IWidget) {
	C.gtk_action_bar_pack_start(a.native(), child.toWidget())
}
//gtk_action_bar_pack_start(GtkActionBar *action_bar,GtkWidget *child)