@Override
  @Nullable
  public Object getData(@NotNull @NonNls String dataId) {
    if (PlatformCoreDataKeys.BGT_DATA_PROVIDER.is(dataId)) {
      final MessageNode item = getSelectedItem();
      return item != null? (DataProvider)id -> getSlowData(id, item) : null;
    }
    return null;
  }
@Override
  @Nullable
  public Object getData(@NotNull @NonNls String dataId)