Description

Currently, ToParentBlockJoinQuery's explain() returns the explanation for the highest-scoring child document, regardless of the ScoreMode. If the ScoreMode is ScoreMode.Max, this makes sense. However, for other ScoreModes (Min, Avg, Total), this output is not as helpful for the user. We should make the explain output for ToParentBlockJoinQuery depend on the ScoreMode used in the query.