Immutable interfaces?

[buko]

Very cool plugin. Good work.

I'm wondering if you'd be interesting in supporting immutable interfaces? In this model:

• All Jaxb classes of name [Type] are renamed to [Type]Impl
• All Impl classes implement an interface (in a different package) and that interface is immutable.

The goal here would be to support "practical immutability" for only certain consumers -- ie message handlers. This also supports efficient pooling and reuse of objects (once we figure out how to reinitialize a JAXB object.)