This Roo script
creates an error "Type mismatch: cannot convert from Class<ConcurrencyException> to Class<? extends Throwable>" in the method:
of the topdomain.application.web.advices.ConcurrencyExceptionManager class.
ConcurrencyException being part of io.springlets.web.mvc.util.concurrency.
As this was my first entry into using Roo 2 it's not obvious how to fix it. At any rate created code should compile and if there insufficient data Roo should refuse to go forward.