@Override
    public Mutation[] getMutationsForCoprocs() {
      return null;
    }
Batch of mutations for replay. Base class is shared with {@link MutationBatchOperation} as most
of the logic is same.
@deprecated Since 3.0.0, will be removed in 4.0.0. Now we will not use this operation to apply
            edits at secondary replica side.
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java