code: function initExtensions(type, instance, base) {
      let cache = pluginCache;
      if (process.env.APP_TYPE === 'quick') {
          if (!appGlobal.okamPluginCache) {
              appGlobal.okamPluginCache = pluginCache;
          }
          cache = appGlobal.okamPluginCache;
      }
  
      let existedBase = cache.baseClasses[type];
      if (!existedBase) {
          let plugins = cache.usedExtensions[type];
          let args = [{}];
          plugins && Array.prototype.push.apply(args, plugins);
          args.push(base);
  
          existedBase = mixin.apply(this, args);
          cache.baseClasses[type] = existedBase;
      }
  
      return mixin.apply(this, [instance, existedBase]);
  }
docs: Initialize the extensions
  
  @inner
  @param {string} type the type to initialize
  @param {Object} instance the instance to init
  @param {Object} base the instance base to inherit
  @return {Object}