text: // @flow
  import { combineReducers } from 'redux';
  import { connectRouter } from 'connected-react-router';
  import counter from './counter';
  import type { Action } from './types';
  
  export default function createRootReducer(history: History) {
    return combineReducers<Object, Action>({
      router: connectRouter(history),
      counter
    });
  }
  