mastodon/app/assets/javascripts/components/reducers/index.jsx

import { combineReducers } from 'redux-immutable';
import timelines           from './timelines';
import meta                from './meta';
import compose             from './compose';
import follow              from './follow';
import notifications       from './notifications';

export default combineReducers({
  timelines,
  meta,
  compose,
  follow,
  notifications
});