return ServiceController.extend({

      name: 'TestExtension.ServiceController',

      // The values in this object are the validation needed for the current service.
      options: {
        common: {
          requireLoggedInPPS: true
        }
      },

      get: function () {
        var id = this.request.getParameter('id');
        return TestModel.get(id);
      }

<http://TestExtension.Service.ss|TestExtension.Service.ss>

assets/services

function service(request, response) {
  'use strict';

  try {
    require('TestExtension.ServiceController').handle(request, response);
  } catch (ex) {
    console.log('TestExtension.ServiceController ', ex);
    var controller = require('ServiceController');
    controller.response = response;
    controller.request = request;
    controller.sendError(ex);
  }
}