> def foobar2 = 'foo'
> + 'bar2'
> which compiles but gives a runtime error:
> MissingMethodException: No signature of method:
> Since + here is the unary plus operator which while seldom used in that
> fashion is a valid operator.
> Strangely, the foobar2 example parses and runs successfully on Groovy 3
> foobar2 to 'foo'. I'll have to check if that is a bug or "feature".