Value classes are a great addition to our developer toolbox. They help us reduce the count of instances and spare some work for the garbage collector, while allowing us to rely on meaningful types that reflect our business abstractions. However, extending
AnyVal comes with a certain set of conditions that the class must fulfill. For example, a value class may only have one primary constructor that takes one public
val as a single parameter. Furthermore, this parameter cannot be a value class. We saw that value classes can define methods via
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