// FIXME: it seems 'index' has to be non-zero, we should enforce that if that really is the case
// FIXME: it seems 'size' has not be non-zero, we should enforce that if that really is the case
// FIXME: it seems 'index' has to be non-zero, we should enforce that if that really is the case
// FIXME: it seems 'size' has not be non-zero, we should enforce that if that really is the case