How to use

Map

in

lodash

const reducer: Reducer<State> =
 (state: State = initialState, action: Action) => {
 switch (action.type) {
  case 'FETCH_USER_FULFILLED':
   return state.set('myInfo', fromJS(action.data));
  default:
   return state;
 }
}

if (_.isString(value) && BUILTIN_CONFIGS.has(value)) {
 const builtin = BUILTIN_CONFIGS.get(value);
 if (_.isArray(builtin) || _.isString(builtin)) {
  return configObjects.push(flattenConfig(builtin, configObjects));