presto-cassandra/src/main/java/io/prestosql/plugin/cassandra/SizeEstimate.java/SizeEstimate/SizeEstimate
class SizeEstimate:    public SizeEstimate(String rangeStart, String rangeEnd, long meanPartitionSize, long partitionsCount)
    {
        this.rangeStart = requireNonNull(rangeStart, "rangeStart is null");
        this.rangeEnd = requireNonNull(rangeEnd, "rangeEnd is null");
        this.meanPartitionSize = meanPartitionSize;
        this.partitionsCount = partitionsCount;
    }