How to use the angularfire2.AngularFire function in angularfire2

this.spinnerService = spinnerService;
    }
    PortfolioService.prototype.getCompanies = function (user) {
        this.log.info('PortfolioService.getCompanies');
        this.log.error('PortfolioService.getCompanies');
        return this.af.database.list(this.config.baseUrls.portfolio + "/" + user, {
            query: {
                orderByChild: 'order',
            }
        });
    };
    PortfolioService = __decorate([
        // TODO: move to shared?
        core_1.Injectable(),
        __param(0, core_1.Inject(index_1.APP_CONFIG)), 
        __metadata('design:paramtypes', [Object, log_service_1.LogService, angularfire2_1.AngularFire, spinner_service_1.SpinnerService])
    ], PortfolioService);
    return PortfolioService;
}());
exports.PortfolioService = PortfolioService;

this.config = config;
        this.af = af;
        this.spinnerService = spinnerService;
    }
    WatchListService.prototype.getCompanies = function (user) {
        return this.af.database.list(this.config.baseUrls.watchList + "/" + user, {
            query: {
                orderByChild: 'order',
            }
        });
    };
    WatchListService = __decorate([
        // TODO: move to shared?
        core_1.Injectable(),
        __param(0, core_1.Inject(index_1.APP_CONFIG)), 
        __metadata('design:paramtypes', [Object, angularfire2_1.AngularFire, spinner_service_1.SpinnerService])
    ], WatchListService);
    return WatchListService;
}());
exports.WatchListService = WatchListService;

var AuthGuard = (function () {
    function AuthGuard(af, router) {
        this.af = af;
        this.router = router;
    }
    AuthGuard.prototype.canActivate = function () {
        // debugger;
        // if (this.af.auth) { return true; }
        // this.router.navigate(['/login']);
        // return false;
        return true;
    };
    AuthGuard = __decorate([
        core_1.Injectable(), 
        __metadata('design:paramtypes', [angularfire2_1.AngularFire, router_1.Router])
    ], AuthGuard);
    return AuthGuard;
}());
exports.AuthGuard = AuthGuard;

var TeamService = (function () {
    function TeamService(af) {
        this.af = af;
    }
    TeamService.prototype.getTeam = function () {
        return this.af.database.list('about/team', { query: { orderByChild: 'order' } });
    };
    TeamService = __decorate([
        core_1.Injectable(), 
        __metadata('design:paramtypes', [angularfire2_1.AngularFire])
    ], TeamService);
    return TeamService;
}());
exports.TeamService = TeamService;

};
    AppComponent.prototype.update = function (key, name) {
        this.items.update(key, { name: name });
    };
    AppComponent.prototype.deleteItem = function (key) {
        this.items.remove(key);
    };
    AppComponent.prototype.deleteEverything = function () {
        this.items.remove();
    };
    AppComponent = __decorate([
        core_1.Component({
            selector: 'my-app',
            template: "\n  <ul>\n    <li>\n      <input type="\&quot;text\&quot;">\n      <button>Update</button>\n      <button>Delete</button>\n    </li>\n  </ul>\n  <input type="\&quot;text\&quot;">\n  <button>Add</button>\n  <button>Delete All</button>\n  ",
        }), 
        __metadata('design:paramtypes', [angularfire2_1.AngularFire])
    ], AppComponent);
    return AppComponent;
}());
exports.AppComponent = AppComponent;

var CompaniesService = (function () {
    function CompaniesService(af) {
        this.af = af;
    }
    CompaniesService.prototype.getCompanies = function () {
        return this.af.database.list('companies');
    };
    CompaniesService.prototype.getCompany = function (symbol) {
        return this.af.database.object("companies/" + symbol);
    };
    CompaniesService = __decorate([
        core_1.Injectable(), 
        __metadata('design:paramtypes', [angularfire2_1.AngularFire])
    ], CompaniesService);
    return CompaniesService;
}());
exports.CompaniesService = CompaniesService;

var TermsService = (function () {
    function TermsService(af) {
        this.af = af;
    }
    TermsService.prototype.getTerms = function () {
        return this.af.database.list('glossary');
    };
    TermsService = __decorate([
        core_1.Injectable(), 
        __metadata('design:paramtypes', [angularfire2_1.AngularFire])
    ], TermsService);
    return TermsService;
}());
exports.TermsService = TermsService;

var SectorsService = (function () {
    function SectorsService(config, af) {
        this.config = config;
        this.af = af;
    }
    SectorsService.prototype.getSectors = function () {
        return this.af.database.list(this.config.baseUrls.sectors);
    };
    SectorsService.prototype.getSector = function (id) {
        return this.af.database.object(this.config.baseUrls.sectors + "/" + id);
    };
    SectorsService = __decorate([
        core_1.Injectable(),
        __param(0, core_1.Inject(index_1.APP_CONFIG)), 
        __metadata('design:paramtypes', [Object, angularfire2_1.AngularFire])
    ], SectorsService);
    return SectorsService;
}());
exports.SectorsService = SectorsService;

var StockService = (function () {
    function StockService(af) {
        this.af = af;
    }
    StockService.prototype.getStockExchanges = function () {
        return this.af.database.list('stock-exchanges');
    };
    StockService.prototype.getStockExchange = function (symbol) {
        return this.af.database.object("stock-exchanges/" + symbol);
    };
    StockService.prototype.updategetStockExchange = function (stockFirebaesObject, update) {
        stockFirebaesObject.update(update);
    };
    StockService = __decorate([
        core_1.Injectable(), 
        __metadata('design:paramtypes', [angularfire2_1.AngularFire])
    ], StockService);
    return StockService;
}());
exports.StockService = StockService;

var AppComponent = (function () {
    function AppComponent(af) {
        this.item = af.database.object('/item');
        //this.add("hello Pakitan");
    }
    AppComponent.prototype.add = function (value) {
        this.item.set({ name: value });
    };
    AppComponent = __decorate([
        core_1.Component({
            selector: 'my-app',
            template: "\n  <h1>{{ (item | async)?.name }}</h1>\n  ",
        }), 
        __metadata('design:paramtypes', [angularfire2_1.AngularFire])
    ], AppComponent);
    return AppComponent;
}());
exports.AppComponent = AppComponent;