get_extension_args (OpenID::AX::FetchResponse)

    # File lib/openid/extensions/ax.rb, line 394
          def get_extension_args(request = nil)
            aliases = NamespaceMap.new
            zero_value_types = []

            if request
              # Validate the data in the context of the request (the
              # same attributes should be present in each, and the
              # counts in the response must be no more than the counts
              # in the request)
              @data.keys.each{|type_uri|
                unless request.member? type_uri
                  raise IndexError, "Response attribute not present in request: #{type_uri.inspect}"
                end
              }

              request.attributes.each{|attr_info|
                # Copy the aliases from the request so that reading
                # the response in light of the request is easier
                if attr_info.ns_alias.nil?
                  aliases.add(attr_info.type_uri)
                else
                  aliases.add_alias(attr_info.type_uri, attr_info.ns_alias)
                end
                values = @data[attr_info.type_uri]
                if values.empty? # @data defaults to []
                  zero_value_types << attr_info
                end
                if attr_info.count != UNLIMITED_VALUES and attr_info.count < values.size
                  raise Error, "More than the number of requested values were specified for #{attr_info.type_uri.inspect}"
                end
              }
            end

            kv_args = _get_extension_kv_args(aliases)

            # Add the KV args into the response with the args that are
            # unique to the fetch_response
            ax_args = new_args

            zero_value_types.each{|attr_info|
              name = aliases.get_alias(attr_info.type_uri)
              kv_args['type.' + name] = attr_info.type_uri
              kv_args['count.' + name] = '0'
            }
            update_url = (request and request.update_url or @update_url)
            ax_args['update_url'] = update_url unless update_url.nil?
            ax_args.update(kv_args)
            return ax_args
          end