code: function (res, cb) {
              var subModules = res.subModules;
              if (subModules && subModules.length > 0) {
                  if (!this._smList) {
                      this._smList = [];
                  }
                  this._smList = this._smList.concat(res.subModules);
              }
              this.$callback(cb, res);
          }
docs: Internal callback method called when all sub-modules requested in loadSubModules have been loaded.
  @param {Array} res array of the sub-module public interfaces
  @param {aria.core.CfgBeans:Callback} cb callback to be called at the end of this method
  @private