old_contents: export {configureStore, createDefaultMiddleware} from "./configureStore";
  export {createReducer} from "./createReducer";
  
  export {default as createNextState} from "immer";
  export {combineReducers} from "redux";
  export {default as createSelector} from "selectorator";
new_contents: export {configureStore, defaultMiddleware} from "./configureStore";
  export {createReducer} from "./createReducer";
  
  export {default as createNextState} from "immer";
  export {combineReducers} from "redux";
  export {default as createSelector} from "selectorator";
  
subject: Remove createDefaultMiddleware