docs: function loadModel(modelHandle, sModelName, oModel) {
      debuglog(" loading " + sModelName + " ....");
      //var oMdl = readFileAsJSON('./' + modelPath + '/' + sModelName + ".model.json") as IModel;
      var oMdl = makeMdlMongo(modelHandle, sModelName, oModel);
      return loadModelDataMongo(modelHandle, oMdl, sModelName, oModel);
  }