pseudo code for client urn settings

string_is_widget_setting.rb

class StringIsWidgetSetting < String
  attr_reader :widget

  def initialize(field, widget)
    super(widget.send(field))
    @widget = widget
  end

  def method_missing(method_name, *args, &block)
    widget.method_missing(method_name, args, block)
  end
end


# in Widget
def client_urn
  @client_urn ||= StringIsWidgetSetting.new(:client_urn, self)
end