public ConcurrentMap<String, Pair<Long, FindToken>> retrieve() {
      String localReplicaMountPath = localReplica.getReplicaPath();
      File replicaTokenFile = new File(localReplicaMountPath, REMOTE_TOKEN_FILE_NAME);
      if (replicaTokenFile.exists()) {
        try {
          FileInputStream fileInputStream = new FileInputStream(replicaTokenFile);
          return tokenSerde.deserializeTokens(fileInputStream);
        } catch (IOException e) {
          logger.error("IO error while retrieving tokens from disk {}", replicaTokenFile.getAbsolutePath(), e);
          return new ConcurrentHashMap<>();
        }
      } else {
        return new ConcurrentHashMap<>();
      }
    }
Retrieve the remote peers and their tokens.
@return the hash map from the replicas to the tokens
ambry-store/src/main/java/com/github/ambry/store/RemoteTokenTracker.java