presto-orc/src/main/java/io/prestosql/orc/writer/ByteColumnWriter.java/ByteColumnWriter/getColumnStripeStatistics
class ByteColumnWriter:    @Override
    public Map<OrcColumnId, ColumnStatistics> getColumnStripeStatistics()
    {
        checkState(closed);
        return ImmutableMap.of(columnId, ColumnStatistics.mergeColumnStatistics(rowGroupColumnStatistics));
    }