bool

       MongoDB, Inc

       2009-present, MongoDB, Inc.

1.30.4                                            Jun 08, 2025              MONGOC_BULKWRITE_APPEND_UPDATEONE(3)

       Adds a single-document update for the namespace ns. Returns true on success. Returns false and sets error
       if an error occured.

          bool
          mongoc_bulkwrite_append_updateone (mongoc_bulkwrite_t *self,
                                             const char *ns,
                                             const bson_t *filter,
                                             const bson_t *update,
                                             const mongoc_bulkwrite_updateoneopts_t *opts /* May be NULL */,
                                             bson_error_t *error);