presto-hive/src/main/java/io/prestosql/plugin/hive/HiveBucketFunction.java/HiveBucketFunction/toString
class HiveBucketFunction:    @Override
    public String toString()
    {
        return toStringHelper(this)
                .add("version", bucketingVersion)
                .add("bucketCount", bucketCount)
                .add("typeInfos", typeInfos)
                .toString();
    }