code: public function load()
      {
          $storage = $this->getStorage();
          if ($storage) {
              $data = $storage->get($this->userId, $this->getStorageKey());
              if ($data) {
                  $this->state = json_decode($data, true);
              } else {
                  $this->state = [];
              }
              $success = is_array($this->state);
          } else {
              $success = false;    
          }
          return $success;
      }
docs: Loads the extended state from the storage
  @return bool