Attribute Dictionary & V4.0

[Rod Widdowson]

> As a general matter, the main trick Java 8 added is that you can now add methods to interfaces that 
> have default implementations so it's possible to compatibly change them in some cases without 
> breaking anybody's code. 

Yea, I think I meant that I couldn't see how that could be used in this case - with the added twist that once we put an
implementation into an Interface (which is by its nature an API) we have to stand by it somehow.

But I think that I also meant that until we had a need we wouldn't know whether it worked or not, and that even if it didn't there
were other ways of achieving what we need.

Certainly default implementations will be a very useful tool for the duration of V4...

R