@Override
    public void deserialize(Buffer buf) {
        questId = buf.readUShort();
        if (questId < 0 || questId > 65535)
            throw new RuntimeException("Forbidden value on questId = " + questId + ", it doesn't respect the following condition : questId < 0 || questId > 65535");
        stepId = buf.readUShort();
        if (stepId < 0 || stepId > 65535)
            throw new RuntimeException("Forbidden value on stepId = " + stepId + ", it doesn't respect the following condition : stepId < 0 || stepId > 65535");
    }