void

       MongoDB, Inc

       2009-present, MongoDB, Inc.

1.30.4                                            Jun 08, 2025                  MONGOC_WRITE_CONCERN_SET_WTAG(3)

       Sets  the write tag that must be satisfied for the write to indicate success. Write tags are preset write
       concerns configured on your MongoDB server. See  mongoc_write_concern_t  for  more  information  on  this
       setting.

       Beginning  in  version  1.9.0, this function can now alter the write concern after it has been used in an
       operation. Previously, using the struct with an operation would mark it  as  "frozen"  and  calling  this
       function would log a warning instead instead of altering the write concern.

       • write_concern: A mongoc_write_concern_t.

       • tag: A string containing the write tag.

          void
          mongoc_write_concern_set_wtag (mongoc_write_concern_t *write_concern,
                                         const char *tag);