Generating model through a report

I'm trying to generate a model with the method below from the ModelGeneration class:

generateModel ( Model[] models, String sName, int nModelType, Group group, ModelGenerationOptions options )

It fails because my "models" parameter is a standard javascript array, rather than a com.aris.modeling.common.serverremoteapi.cscommon.webreportbase.reportObjects.IModel[] interface. (see attached screenshot for error message)

How can I create a proper Model[] array of my own so that this method will work? Using ArisData.getSelectedModels() is not enough as I need to be able to select the right models on runtime.