# File lib/rudy/metadata.rb, line 156
156:     def self.included(obj)
157:       obj.send :include, Rudy::Metadata::InstanceMethods
158:       
159:       # Add common storable fields. 
160:       [COMMON_FIELDS, :position].flatten.each do |n|
161:         obj.field n
162:       end
163:       
164:     end