code: function amqpObjectType( instance ) {
      if ( instance && instance.subscribeRaw )
          return 'Queue';
      if ( instance && instance.cleanup )
          return 'Exchange';
      if ( instance && instance.addListener )
          return 'Connection';
      return null;
  }
docs: /* amqpObjectType
  Helper function that identifies object types from the node amqp module
  Could probably do better, but do not want to require amqp locally so trying to avoid
  instanceof.