presto-cassandra/src/main/java/io/prestosql/plugin/cassandra/SizeEstimate.java/SizeEstimate/toString
class SizeEstimate:    @Override
    public String toString()
    {
        return toStringHelper(this)
                .add("rangeStart", rangeStart)
                .add("rangeEnd", rangeEnd)
                .add("meanPartitionSize", meanPartitionSize)
                .add("partitionsCount", partitionsCount)
                .toString();
    }