_ _

function Widget1DataService($q, $http) {
  var dataPromise;
  this.getData = getData;

  function getData(date) {
    if (dataPromise) return dataPromise;
    dataPromise = $q.all([
                    $http.post("/products/count/today", date),
                    $http.post("/out/today", date)
                ]).then(function(response) {
                    return {
                      data1: response[0],
                      data2: response[1]
                    };
               });
    return dataPromise;
  }  
}

Widget1DataService.getData(...)
  .then(function(data) {
    $scope.widgetData = data;
  });

class Hero {
  ...
  public alterEgo?: string;
  constructor(..., _alterEgo?: string) {
    this.alterEgo = _alterEgo; 
  }
}

/**
   * 
   * @param $element
   * @param {ClientService} ClientService
   */
  constructor($element, ClientService) {

        $element.on('click', () => {
            ClientService.getClientsList().then((clients)=> {
                console.log(clients);
            })
        });
    }