# File lib/aws/iam/mfa_device_collection.rb, line 109
      def each_item response, &block
        response.mfa_devices.each do |item|

          if item.serial_number =~ /^arn:/
            mfa_device = VirtualMfaDevice.new_from(:list_mfa_devices, item,
                                                   item.serial_number,
                                                   :config => config)
          else
            mfa_device = MFADevice.new(user, item.serial_number)
          end

          yield(mfa_device)

        end
      end