open-vault/ui/app/routes/vault/cluster/access/control-groups.js

import Ember from 'ember';
import UnloadModel from 'vault/mixins/unload-model-route';
const { inject } = Ember;

export default Ember.Route.extend(UnloadModel, {
  version: inject.service(),

  beforeModel() {
    return this.get('version').fetchFeatures().then(() => {
      return this._super(...arguments);
    });
  },

  model() {
    return this.get('version').hasFeature('Control Groups') ? this.store.createRecord('control-group') : null;
  },
});