Hi,
nothing special from me this time.
The API looks verbose (it's the Java thing ;) but I would not trade builder
to new Jsonb(). Examples are clear.
Not sure whether JsonbConfig should be an interface instead of a class.
Minor thing but IMO API should consist only interfaces & exception classes.
One small comment on style: public (as well as any other) modifier is
useless in interfaces and should be removed.
Cheers,
Przemyslaw