generator-fountain-angular2/generators/service/templates/src/app/service.ts

Yeoman Fountain generator to scaffold a webapp with Angular 2 written in ES6 (Babel), TypeScript through Webpack or SystemJS including tools Gulp 4, ESLint, Browsersync and Karma

import {Injectable} from '@angular/core';

@Injectable()
export class <%- className %> {
  getData() {
    return 1 + 2;
  }
}