Function treeForStyles

tests/unit/broccoli/ember-app-test.js:142–144

()

        packageRoot: 'foo',
        name: 'foo',
        treeForStyles() {
          return addonFooStyles.path();
        },
      });
      let addonFoo = new AddonFoo(app, project);
      app.project.addons.push(addonFoo);