@Override
  protected void doSetStoreFiles(Collection<StoreFileInfo> files) throws IOException {
    throw new UnsupportedOperationException(
      "Should not call this method on " + getClass().getSimpleName());
  }
A store file tracker used for migrating between store file tracker implementations.
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/storefiletracker/MigrationStoreFileTracker.java