@Override
  public Future<Void> addReplicationPeerAsync(String peerId, ReplicationPeerConfig peerConfig,
    boolean enabled) throws IOException {
    return admin.addReplicationPeer(peerId, peerConfig, enabled);
  }
The {@link Admin} implementation which is based on an {@link AsyncAdmin}.
hbase-client/src/main/java/org/apache/hadoop/hbase/client/AdminOverAsyncAdmin.java