default void postReplicationSinkBatchMutate(
    ObserverContext<RegionServerCoprocessorEnvironment> ctx, AdminProtos.WALEntry walEntry,
    Mutation mutation) throws IOException {

  }
This will be called after replication sink mutations are executed on the sink table as part of
batch call.
@param ctx      the environment to interact with the framework and region server.
@param walEntry wal entry from which mutation is formed.
@param mutation mutation to be applied at sink cluster.
@throws IOException if something goes wrong.
hbase-server/src/main/java/org/apache/hadoop/hbase/coprocessor/RegionServerObserver.java