How to use the overmind/config.merge function in overmind

// import * as deployment from './namespaces/deployment';
import * as editor from './namespaces/editor';
import * as explore from './namespaces/explore';
import * as files from './namespaces/files';
// import * as git from './namespaces/git';
// import * as live from './namespaces/live';
// import * as patron from './namespaces/patron';
import * as preferences from './namespaces/preferences';
// import * as profile from './namespaces/profile';
import * as server from './namespaces/server';
// import * as userNotifications from './namespaces/userNotifications';
import * as workspace from './namespaces/workspace';
import { onInitialize } from './onInitialize';
import { state } from './state';

export const config = merge(
  {
    onInitialize,
    effects,
    state,
    actions,
  },
  namespaced({
    preferences,
    // userNotifications,
    // patron,
    editor,
    // live,
    // workspace,
    // dashboard,
    // deployment,
    files,

import * as deployment from './namespaces/deployment';
import * as editor from './namespaces/editor';
import * as explore from './namespaces/explore';
import * as files from './namespaces/files';
import * as git from './namespaces/git';
import * as live from './namespaces/live';
import * as patron from './namespaces/patron';
import * as preferences from './namespaces/preferences';
import * as profile from './namespaces/profile';
import * as server from './namespaces/server';
import * as userNotifications from './namespaces/userNotifications';
import * as workspace from './namespaces/workspace';
import { onInitialize } from './onInitialize';
import { state } from './state';

export const config = merge(
  {
    onInitialize,
    effects,
    state,
    actions,
  },
  namespaced({
    preferences,
    userNotifications,
    patron,
    editor,
    live,
    workspace,
    dashboard,
    dashboard_new,
    deployment,

import { IConfig } from 'overmind'
import { merge, namespaced } from 'overmind/config'
import state from './state'
import onInitialize from './onInitialize'
import * as actions from './actions'
import * as effects from './effects'
import { createHook } from 'overmind-react'

export const config = merge(
  {
    onInitialize,
    state,
    actions,
    effects,
  },
  namespaced({
    foo: {
      actions: {
        foo: () => {},
      },
    },
  })
)

declare module 'overmind' {