void

       MongoDB, Inc

       2009-present, MongoDB, Inc.

1.30.4                                            Jun 08, 2025                   MONGOC_BULKWRITEOPTS_SET_LET(3)

let  is  a map of parameter names and values to apply to all operations within the bulk write. Value must
       be constant or closed expressions that do not reference document fields. Parameters can then be  accessed
       as variables in an aggregate expression context (e.g. "$$var").

          void
          mongoc_bulkwriteopts_set_let (mongoc_bulkwriteopts_t *self, const bson_t *let);