@Override
    public int hashCode() {
        int hash = 0;
        hash += (name != null ? name.hashCode() : 0)
                + (releaseForm != null ? releaseForm.hashCode() : 0)
                + (ages != null ? ages.hashCode() : 0)
                + (quantityPerPack != null ? quantityPerPack.hashCode() : 0);
        return hash;
    }