RequestHeader for Flexmonster.Datasource?

Hi there!

A bit time-sensitive, but here's my situation: I'm trying to implement the trial version of the Flexmonster PivotGrid (been trying Microsoft Analysis Services OR JSON version, since I'm using an OLAP cube) and I realize that I can't connect to my cube without some custom headers attached. Looking through the API reference for the Report object's Datasource object, I noticed the helpful "requestHeader" property that seems to be exactly what I need. Using the Angular implementation, I tried to assign new headers directly to the definition of the datasource like so:

this.flexDataSource = {
  catalog: 'XXXX',
  cube: 'XXXX',
  dataSourceType: 'json',    // I've been trying 'microsoft analysis services' too, since I got both trial keys to try out
  proxyUrl: analysisServicesUrl + '/read',
  requestHeader: newHeaders    <-------------!!!
};

The problem is I'm getting error that reads: "Type '{ catalog: string; cube: string; dataSourceType: string; proxyUrl: string; requestHeader: { 'Authorization': string; 'Blahblahblah': string; }; }' is not assignable to type 'DataSource'. Object literal may only specify known properties, and 'requestHeader' does not exist in type 'DataSource'".

Looking at the library for "Flexmonster.Datasource" (interface Datasource in flexmonster.types.d.ts), I do not see the property "requestHeader" at all (nor "subquery", which I also need). Is this a version issue or am I just implementing this wrong in my Angular application? Please help!

Thanks,
 
Jon