protected ReplicationSourceShipper createNewShipper(String walGroupId,
    ReplicationSourceWALReader walReader) {
    return new ReplicationSourceShipper(conf, walGroupId, this, walReader);
  }
Instantiation method used by region servers
@param conf      configuration to use
@param fs        file system to use
@param manager   replication manager to ping to
@param server    the server for this region server
@param queueData the id and offsets of our replication queue
@param clusterId unique UUID for the cluster
@param metrics   metrics for replication source
hbase-server/src/main/java/org/apache/hadoop/hbase/replication/regionserver/ReplicationSource.java