How to use the @hpcc-js/marshaller.RoxieResult function in @hpcc-js/marshaller

new FormField().fieldID("st").value("MA"),
                        new FormField().fieldID("zip").value("01826")
                    ]),
                new WUResult(ec)
                    .wu(
                        new WU(ec)
                            .url("http://192.168.3.22:8010")
                            .wuid("W20171201-153452")
                    )
                    .resultName("Result 1")
                ,
                new LogicalFile(ec)
                    .url("http://192.168.3.22:8010")
                    .logicalFile("progguide::exampledata::peopleaccts")
                ,
                new RoxieResult(ec)
                    .service(vmRoxie)
                    .resultName("Accounts")
            ]) {
                datasources.push(datasource);
            }
        }
    }