presto-main/src/main/java/io/prestosql/operator/EmptyLookupSource.java/EmptyLookupSource/getNextJoinPosition
class EmptyLookupSource:    @Override
    public long getNextJoinPosition(long currentJoinPosition, int probePosition, Page allProbeChannelsPage)
    {
        throw new UnsupportedOperationException();
    }