cmp/internal/value/pointer_unsafe.go
func PointerOf(v reflect.Value) Pointer {
	// The proper representation of a pointer is unsafe.Pointer,
	// which is necessary if the GC ever uses a moving collector.
	return Pointer{unsafe.Pointer(v.Pointer()), v.Type()}
}
func PointerOf(v reflect.Value) Pointer {
	// The proper representation of a pointer is unsafe.Pointer,
	// which is necessary if the GC ever uses a moving collector.
	return Pointer{unsafe.Pointer(v.Pointer()), v.Type()}
}
// PointerOf returns a Pointer from v, which must be a
// reflect.Ptr, reflect.Slice, or reflect.Map.