Thank you for the contribution. It has been approved.

I am a big fan of DDD, here is one of the packages we use at my work place: https://github.com/funeralzone/valueobjects .
really helpful and friendly ValueObjects package.

There are a few suggestions I would make to your project however: try and not commit your IDE preference folder to git anymore (.idea), as it is not an actual contribution and it hardens collaboration while when practicing DDD you shouldn't need getters and setters in particular on your entities and your architecture should illustrate your bounded contexts first.

All of that, this is a nice first step into educating yourself and helping others grasp some of the concepts useful with DDD.

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