extended (DataMapper::Model)

    # File lib/dm-core/model.rb, line 130
        def self.extended(model)
          descendants << model

          model.instance_variable_set(:@valid,         false)
          model.instance_variable_set(:@base_model,    model)
          model.instance_variable_set(:@storage_names, {})
          model.instance_variable_set(:@default_order, {})
          model.instance_variable_set(:@descendants,   descendants.class.new(model, descendants))

          extra_extensions.each { |mod| model.extend(mod)         }
          extra_inclusions.each { |mod| model.send(:include, mod) }
        end