public override int HandleMap(IndexItem indexItem, IEnumerable mapResults, IndexWriteOperation writer, TransactionOperationContext indexContext, IndexingStatsScope stats) { if (_enumerationWrappers.TryGetValue(CurrentIndexingScope.Current.SourceCollection, out AnonymousObjectToBlittableMapResultsEnumerableWrapper wrapper) == false) { _enumerationWrappers[CurrentIndexingScope.Current.SourceCollection] = wrapper = new AnonymousObjectToBlittableMapResultsEnumerableWrapper(this, indexContext); } wrapper.InitializeForEnumeration(mapResults, indexContext, stats); return(PutMapResults(indexItem.LowerId, indexItem.Id, wrapper, indexContext, stats)); }