Idea for spying final classes

[rogerdpack]

I notice that with Mockito, assuming a logger instance is "final", you can't do 

logger = spy(logger); 

but you can do 

logger = mock(Logger.class);

So I had this idea...if the target of a spy is final, but not the class itself, maybe Mockito could create a "delegate" full object, to kind of wrap the final instance?  Just an idea.

Cheers!