Question on Java Enums:
This document: https://github.com/jruby/jruby/wiki/CallingJavaFromJRuby says you can call .each on Java Enums.
I am not seeing that. 
When I have this code:
```
 puts "ancestors"
          puts command_enum.ancestors
          command_enum.each {|enum| puts enum}
```
I get this:
```
ancestors
Java::OrgOpenhabCoreLibraryTypes::StopMoveType
Java::OrgOpenhabCoreTypes::PrimitiveType
Java::OrgOpenhabCoreTypes::Command
Java::OrgOpenhabCoreTypes::Type
Java::JavaLang::Enum
Java::JavaLang::Comparable
Comparable
Java::JavaIo::Serializable
Java::JavaLang::Object
ConcreteJavaProxy
JavaProxy
JavaProxyMethods
Object
PP::ObjectMixin
Kernel
BasicObject
NoMethodError: undefined method `each' for Java::OrgOpenhabCoreLibraryTypes::StopMoveType:Class
```