docs: function () {
              var res = this._persistentStorage;
              if (res == null) {
                  if (this.data) {
                      res = this.data[Aria.FRAMEWORK_PREFIX + "persist::" + this.tplClasspath];
                      if (res == null) {
                          res = {};
                          this.data[Aria.FRAMEWORK_PREFIX + "persist::" + this.tplClasspath] = res;
                      }
                  } else {
                      res = {};
                  }
                  this._persistentStorage = res;
              }
              return res;
          }