@Override
  public String toString() {
    StringBuilder sb = new StringBuilder();
    sb.append("ReplicaMetadataResponse[");
    sb.append("ServerErrorCode=").append(getError());
    if (replicaMetadataResponseInfoList != null) {
      sb.append(" ReplicaMetadataResponseInfo ");
      for (ReplicaMetadataResponseInfo replicaMetadataResponseInfo : replicaMetadataResponseInfoList) {
        sb.append(replicaMetadataResponseInfo.toString());
      }
    }
    sb.append("]");
    return sb.toString();
  }
The response for a ReplicaMetadataRequest. This returns the new entries found
and the new token that could be used for future searches
ambry-protocol/src/main/java/com/github/ambry/protocol/ReplicaMetadataResponse.java