func (v *Container) ChildNotify(child IWidget, childProperty string) {
	cstr := C.CString(childProperty)
	defer C.free(unsafe.Pointer(cstr))
	C.gtk_container_child_notify(v.native(), child.toWidget(),
		(*C.gchar)(cstr))
}
func (v *Container) ChildNotify(child IWidget, childProperty string) {
	cstr := C.CString(childProperty)
	defer C.free(unsafe.Pointer(cstr))
	C.gtk_container_child_notify(v.native(), child.toWidget(),
		(*C.gchar)(cstr))
}
// TODO: gtk_container_child_get_valist
// TODO: gtk_container_child_set_valist
// ChildNotify is a wrapper around gtk_container_child_notify().