@Override
  public void loadState(@NotNull Element state) {
    myState = XmlSerializer.deserialize(state, State.class);
    try {
      migrateOldShelfInfo(state, false);
      migrateOldShelfInfo(state, true);
    }
    catch (IOException e) {
      LOG.error(e);
    }
  }
@Override
  public void loadState(@NotNull Element state)