Use of ObjectSpace may be a JRuby conflict

The current mod_declare used in declarations may conflict with JRuby because it uses ObjectSpace (which JRuby disables by default):

      def mod_declare(klass, declaration, configs={}, &block)
        options = {}
        options[:arity] = arity(block) if block_given?

        subclass = declare(klass, declaration, configs, options)

        if block_given?
          mod = Module.new
          mod.module_eval %Q{
            ACTION = ObjectSpace._id2ref(#{block.object_id})
            def process(*args)
              results = super
              case ACTION.arity
              when 0 then ACTION.call
              when 1 then ACTION.call(self)
              else ACTION.call(self, *args)
              end
              results
            end
          }
          subclass.send(:include, mod)
        end
        subclass.instance
      end

I haven't tested for a conflict, but this is another suggestion that mod_declare is going about things in the wrong way.