Having trouble understanding how npm soap package works - api

Question

I'm using the npm soap package to connect to a SOAP API and call methods, and I'm not grasping how this is supposed to work.
For instance, in the API documentation, it gives this as an example:
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ser="http://xxx">
<soapenv:Header/>
<soapenv:Body>
<ser:setSessionParameters>
<viewSettings>
<forceLogoutSession>yes</forceLogoutSession>
<rollingPeriod>Minutes30</rollingPeriod>
<shiftStart>21600000</shiftStart>
<statisticsRange>CurrentDay</statisticsRange>
<timeZone>-28800000</timeZone>
<idleTimeOut>1800</idleTimeOut>
</viewSettings>
</ser:setSessionParameters>
</soapenv:Body>
</soapenv:Envelope>
And if I use a REST tool to send this content to the API endpoint, it works as expected.
In my code, if I invoke this method call:
var x = client.describe();
console.log(x.WsSupervisorService.WsSupervisorPort.setSessionParameters);
I get this response:
{
input: {
viewSettings: {
appType: 'xs:string',
forceLogoutSession: 'xs:boolean',
rollingPeriod: 'rollingPeriod|xs:string|Minutes5,Minutes10,Minutes15,Minutes30,Hour1,Hours2,Hours3,Today',
shiftStart: 'xs:int',
statisticsRange: 'statisticsRange|xs:string|RollingHour,CurrentDay,CurrentWeek,CurrentMonth,Lifetime,CurrentShift',
timeZone: 'xs:int',
targetNSAlias: 'tns',
targetNamespace: 'http://xxx'
},
targetNSAlias: 'tns',
targetNamespace: 'http://xxx'
},
output: {
targetNSAlias: 'tns',
targetNamespace: 'http://xxx'
}
}
But this fails:
client.setSessionParameters({
input: {
viewSettings: {
forceLogoutSession: true,
rollingPeriod: 'Minutes30',
shiftStart: 216000000,
statisticsRange: 'CurrentDay',
timeZone: -288000000,
idleTimeOut: 1800
}
}
});
...yielding this error:
{ [Error: env:Client: Endpoint {http://xxx/}WsSupervisorPort does not contain operation meta data for: setSessionParameters] stack: [Getter] }
I'm at a loss here. Any help would be hugely appreciated!

Answer 1

Simply try:
client.setSessionParameters({
viewSettings: {
forceLogoutSession: true,
rollingPeriod: 'Minutes30',
shiftStart: 216000000,
statisticsRange: 'CurrentDay',
timeZone: -288000000,
idleTimeOut: 1800
}
});