@Override
  public String toString() {
    return "TtlUpdateRequest[" + "BlobID=" + blobId + ", " + "PartitionId=" + blobId.getPartition() + ", " + "ClientId="
        + clientId + ", " + "CorrelationId=" + correlationId + ", " + "AccountId=" + blobId.getAccountId() + ", "
        + "ContainerId=" + blobId.getContainerId() + ", " + "ExpiresAtMs=" + expiresAtMs + ", " + "OperationTimeMs="
        + operationTimeInMs + "]";
  }
@return the time of the operation (in ms)
ambry-protocol/src/main/java/com/github/ambry/protocol/TtlUpdateRequest.java