CustomApp not working anymore? about react-admin HOT 3 CLOSED

import { routerReducer } from 'react-router-redux';
import { adminReducer } from 'admin-on-rest';
import { reducer as formReducer } from 'redux-form';

export default combineReducers({
  routing: routerReducer,
  form: formReducer,
  admin: adminReducer([{ name: 'resource1' }, { name:  'resource2' }]),
});