presto-main/src/main/java/io/prestosql/operator/LookupJoinPageBuilder.java/LookupJoinPageBuilder/reset
class LookupJoinPageBuilder:    public void reset()
    {
        // be aware that probeIndexBuilder will not clear its capacity
        probeIndexBuilder.clear();
        buildPageBuilder.reset();
        estimatedProbeBlockBytes = 0;
        isSequentialProbeIndices = true;
    }