diegoceccarelli commented on a change in pull request #300: SOLR-11831: Skip 
second grouping step if group.limit is 1 (aka Las Vegas Patch)
URL: https://github.com/apache/lucene-solr/pull/300#discussion_r273634722
 
 

 ##########
 File path: 
solr/core/src/java/org/apache/solr/search/grouping/distributed/shardresultserializer/SearchGroupsResultTransformer.java
 ##########
 @@ -34,17 +41,37 @@
 /**
  * Implementation for transforming {@link SearchGroup} into a {@link 
NamedList} structure and visa versa.
  */
-public class SearchGroupsResultTransformer implements 
ShardResultTransformer<List<Command>, Map<String, 
SearchGroupsFieldCommandResult>> {
+public abstract class SearchGroupsResultTransformer implements 
ShardResultTransformer<List<Command>, Map<String, 
SearchGroupsFieldCommandResult>> {
 
 Review comment:
   https://github.com/bloomberg/lucene-solr/pull/231 sketches the idea, what do 
you think? 

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