use include so we can test with is_a

using the well documented included/extend trick

lib/parfait/layout.rb

@@ -21,7 +21,22 @@
 # Together they turn the object into a hash like structure
 
 module Parfait
-  class Layout < List
+  class Layout < Object
+    include Indexed
+    self.offset(0)
+
+    def each
+      # not sure how to do this with define_method, because of the double block issue.
+      # probably some clever way around that, but not important
+      index = 1
+      while index <= self.get_length
+        item = get(index)
+        yield item
+        index = index + 1
+      end
+      self
+    end
+
     attribute :object_class
 
     def initialize( object_class )