Method callback

tests/helpers/fixturify-project.js:245–252

(engine)

   */
  addEngine(name, version = '0.0.0', options = { allowCachingPerBundle: false, enableLazyLoading: false }) {
    const callback = (engine) => {
      engine.pkg.keywords.push('ember-engine');

      // call original callback if it exists
      if (typeof options.callback === 'function') {
        options.callback(engine);
      }
    };

    if (options.enableLazyLoading) {
      return this.addAddon(name, version, {