Example Vert.x EventBus Service Proxy Issues

ambassador_service-proxy.js

  AmbassadorsService.createProxy = function(vertx, ebAddress) {
    var __args = arguments;
    
    // The `__args[0]._jdel` object is `undefined`...
    if (__args.length === 2 && typeof __args[0] === 'object' && __args[0]._jdel && typeof __args[1] === 'string') {
      if (closed) {
        throw new Error('Proxy is closed');
      }
      j_eb.send(j_address, {"vertx":__args[0], "ebAddress":__args[1]}, {"action":"createProxy"});
      return;
    } else throw new TypeError('function invoked with invalid arguments');
  };

In the example generated code above, when I call createProxy(eb, addr) the if statement never evaluates to true because the __args[0]._jdel object is always undefined.