@Override
  public String toString() {
    StringBuilder builder = new StringBuilder("id : ").append(id);
    builder.append(", enabled : " + enabled);
    builder.append(", config : " + config);
    builder.append(", syncReplicationState : " + syncReplicationState);
    return builder.toString();
  }
The POJO equivalent of ReplicationProtos.ReplicationPeerDescription.
<p>
To developer, here we do not store the new sync replication state since it is just an
intermediate state and this class is public.
hbase-client/src/main/java/org/apache/hadoop/hbase/replication/ReplicationPeerDescription.java