presto-thrift-api/src/main/java/io/prestosql/plugin/thrift/api/PrestoThriftSplitBatch.java/PrestoThriftSplitBatch/toString
class PrestoThriftSplitBatch:    @Override
    public String toString()
    {
        return toStringHelper(this)
                .add("numberOfSplits", splits.size())
                .add("nextToken", nextToken)
                .toString();
    }