// This is your main reducer.js file
import { combineReducers } from 'redux';

export features, { isFeatureEnabled as isFeatureEnabledSelector } from './features';
// ...other reducers

export default combineReducers({
  features,
  // ...other reducers
});

// This is the important part, access to `features` reducer should only happens via this selector.
// Then you can always change where/how the features are stored.
export isFeatureEnabled({ features }, featureName) {
  return isFeatureEnabledSelector(features, featureName);
}