text: import { forEachValue } from '../util'
  
  // Base data struct for store's module, package with some attribute and method
  export default class Module {
    constructor (rawModule, runtime) {
      this.runtime = runtime
      // Store some children item
      this._children = Object.create(null)
      // Store the origin module object which passed by programmer
      this._rawModule = rawModule
      const rawState = rawModule.state
  
      // Store the origin module's state
      this.state = (typeof rawState === 'function' ? rawState() : rawState) || {}
    }
  
    get namespaced () {
      return !!this._rawModule.namespaced
    }
  
    addChild (key, module) {
      this._children[key] = module
    }
  
    removeChild (key) {
      delete this._children[key]
    }
  
    getChild (key) {
      console.log('===============获取child==================')
      console.log(this._children)
      return this._children[key]
    }
  
    update (rawModule) {
      this._rawModule.namespaced = rawModule.namespaced
      if (rawModule.actions) {
        this._rawModule.actions = rawModule.actions
      }
      if (rawModule.mutations) {
        this._rawModule.mutations = rawModule.mutations
      }
      if (rawModule.getters) {
        this._rawModule.getters = rawModule.getters
      }
    }
  
    forEachChild (fn) {
      forEachValue(this._children, fn)
    }
  
    forEachGetter (fn) {
      if (this._rawModule.getters) {
        forEachValue(this._rawModule.getters, fn)
      }
    }
  
    forEachAction (fn) {
      if (this._rawModule.actions) {
        forEachValue(this._rawModule.actions, fn)
      }
    }
  
    forEachMutation (fn) {
      if (this._rawModule.mutations) {
        forEachValue(this._rawModule.mutations, fn)
      }
    }
  }
  