apeforest commented on a change in pull request #14836: Refactor AGInfo and 
Imperative
URL: https://github.com/apache/incubator-mxnet/pull/14836#discussion_r305028021
 
 

 ##########
 File path: src/io/iter_sparse_batchloader.h
 ##########
 @@ -100,15 +100,15 @@ class SparseBatchLoader : public BatchLoader, public 
SparseIIterator<TBlobBatch>
     return false;
   }
 
-  virtual const TBlobBatch &Value(void) const {
+  virtual const TBlobBatch& Value(void) const {
 
 Review comment:
   I think both styles are fine: 
https://google.github.io/styleguide/cppguide.html#Pointer_and_Reference_Expressions
   
   No need to change this

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