Boolean constants don't support ".class" like Numbers do.

Using the groovysh, one can use the ".class" or ".getClass()" methods on numbers and Strings like so

>println "String".class
>go
class java.lang.String

>println 1.0.class
>go
class java.lang.BigDecimal

but not boolean's
>println true.class
groovysh script: 1: could not use 'true' at 1:9: literal connot directly follow another expression
println true.class
^

This strikes me as inconsistent especially since
>b = true
>println b.class
>go
class java.lang.Boolean

works.