@Override
public void onLoadFailed(Exception e) {
cb.onDataFetcherFailed(sourceKey, e, loadData.fetcher, DataSource.DATA_DISK_CACHE);
}
@Override
public void onDataReady(Object data) {
cb.onDataFetcherReady(sourceKey, data, loadData.fetcher, DataSource.DATA_DISK_CACHE, sourceKey);
}