gtk/widget.go
func (v *Allocation) native() *C.GtkAllocation {
	return (*C.GtkAllocation)(unsafe.Pointer(&v.GdkRectangle))
}
func (v *Allocation) native() *C.GtkAllocation {
	return (*C.GtkAllocation)(unsafe.Pointer(&v.GdkRectangle))
}
// Native returns a pointer to the underlying GtkAllocation.