presto-orc/src/main/java/io/prestosql/orc/OrcWriterStats.java/OrcWriterStats/toString
class OrcWriterStats:    @Override
    public String toString()
    {
        return toStringHelper(this)
                .add("allFlush", allFlush)
                .add("maxRowsFlush", maxRowsFlush)
                .add("maxBytesFlush", maxBytesFlush)
                .add("dictionaryFullFlush", dictionaryFullFlush)
                .add("closedFlush", closedFlush)
                .add("writerSizeInBytes", writerSizeInBytes.get())
                .toString();
    }