to_message (OpenID::Extension)

    # File lib/openid/extension.rb, line 21
        def to_message(message = nil)
          if message.nil?
    #         warnings.warn('Passing None to Extension.toMessage is deprecated. '
    #                       'Creating a message assuming you want OpenID 2.',
    #                       DeprecationWarning, stacklevel=2)
            Message.new(OPENID2_NS)
          end
          message = Message.new if message.nil?

          implicit = message.is_openid1()

          message.namespaces.add_alias(@ns_uri, @ns_alias, implicit)
          # XXX python ignores keyerror if m.ns.getAlias(uri) == alias

          message.update_args(@ns_uri, get_extension_args)
          return message
        end