implement these missing warnings as described in [1]:

Compilation warnings

javac may provide some helpful warnings about interactions with other features:

- A 'finalize' method of a value class shouldn't be declared, will never be invoked by the JVM

(we should probably add a comment to Object::finalize stating that finalization is not supported for value classes)

- A concrete Serializable class that meets all of the following conditions cannot be serialized or deserialized: 1) is either a value class or an identity class that extends a Serializable abstract value class, 2) doesn't declare/inherit a writeReplace method of the appropriate form for serialization to use, 3) isn't a record, and 4) isn't a primitive wrapper class

[1] https://bugs.openjdk.org/browse/JDK-8317277