gtk/gtk.go
func (v *Container) ChildSetProperty(child IWidget, name string, value interface{}) error {
	gv, e := glib.GValue(value)
	if e != nil {
		return e
	}
	cstr := C.CString(name)
	defer C.free(unsafe.Pointer(cstr))

	C.gtk_container_child_set_property(v.native(), child.toWidget(), (*C.gchar)(cstr), (*C.GValue)(unsafe.Pointer(gv.Native())))
	return nil
}
func (v *Container) ChildSetProperty(child IWidget, name string, value interface{}) error {
	gv, e := glib.GValue(value)
	if e != nil {
		return e
	}
	cstr := C.CString(name)
	defer C.free(unsafe.Pointer(cstr))

	C.gtk_container_child_set_property(v.native(), child.toWidget(), (*C.gchar)(cstr), (*C.GValue)(unsafe.Pointer(gv.Native())))
	return nil
}
// ChildSetProperty is a wrapper around gtk_container_child_set_property().