add_extension (OpenID::Server::OpenIDResponse)

    # File lib/openid/server.rb, line 902
          def add_extension(extension_response)
            # Add an extension response to this response message.
            #
            # extension_response:: An object that implements the
            #     #OpenID::Extension interface for adding arguments to an OpenID
            #     message.
            extension_response.to_message(@fields)
          end