mongoc_client_session_advance_cluster_time (mongoc_client_session_t *session,
                                            const bson_t *cluster_time);

Advance the cluster time for a session. Has an effect only if the new cluster time is greater than the session’s current cluster time.

Use mongoc_client_session_advance_operation_time() and mongoc_client_session_advance_cluster_time() to copy the operationTime and clusterTime from another session, ensuring subsequent operations in this session are causally consistent with the last operation in the other session