code: function(options){
        var storage;
  
        var StorageType = options.storageType || this.storageType;
        if (_.isFunction(StorageType)){
          storage = new StorageType();
        } else {
          storage = StorageType;
        }
  
        this.storage = storage;
      }
docs: Internal method to initialize storage either from the type's `storageType` or the instance `options.storageType`.