public String toString() {
    StringBuilder sb = new StringBuilder();
    sb.append("[Token=").append(token);
    sb.append(", ").append(" PartitionId=").append(partitionId);
    sb.append(", ").append(" HostName=").append(hostName);
    sb.append(", ").append(" ReplicaPath=").append(replicaPath);
    sb.append(", ").append(" ReplicaType=").append(replicaType).append("]");
    return sb.toString();
  }
Contains the token, hostname, replica path for a local partition. This is used
by replica metadata request to specify token in a partition
ambry-protocol/src/main/java/com/github/ambry/protocol/ReplicaMetadataRequestInfo.java