presto-raptor-legacy/src/main/java/io/prestosql/plugin/raptor/legacy/storage/OrcPageSource.java/OrcPageSource/finish
class OrcPageSource:    @Override
    public CompletableFuture<Collection<Slice>> finish()
    {
        checkState(shardRewriter.isPresent(), "shardRewriter is missing");
        return shardRewriter.get().rewrite(rowsToDelete);
    }