@Override
  public long getShippedBytes() {
    return shippedBytesCounter.value();
  }
This is the metric source for table level replication metrics. We can easy monitor some useful
table level replication metrics such as ageOfLastShippedOp and shippedBytes
hbase-hadoop-compat/src/main/java/org/apache/hadoop/hbase/replication/regionserver/MetricsReplicationTableSourceImpl.java