We can't say with certainty how an unspecified in-the-future library might work, so I'm going to use serde as a stand-in.

You can implement `Serialize` for a wrapper type and still serialize `SomeOtherTypeWithSomeSerialization` (which might be used by the type being wrapper directly or indirectly) differently. It might not be derivable, of course, but "I don't want the default" sort of makes that a given.