How to use the kinvey-nativescript-sdk.Kinvey.DataStore function in kinvey-nativescript-sdk

"luggage",
    "name",
    "price",
    "seats",
    "imageUrl"
];

@Injectable()
export class CarService {
    private static cloneUpdateModel(car: Car): object {
        // tslint:disable-next-line:ban-comma-operator
        return editableProperties.reduce((a, e) => (a[e] = car[e], a), { _id: car.id });
    }

    private allCars: Array = [];
    private carsStore = Kinvey.DataStore.collection("cars");

    getCarById(id: string): Car {
        if (!id) {
            return;
        }

        return this.allCars.filter((car) => {
            return car.id === id;
        })[0];
    }

    load(): Observable {
        return new Observable((observer: any) => {
            this.login().then(() => {
                return this.carsStore.sync();
            }).then(() => {