mongoc_create_indexes(3) on Linux
The text 882fcd70b2f8, as Debian 11 (Bullseye) shipped it.
Creating Indexes To create indexes on a MongoDB collection, execute the createIndexes command with a command function like mongoc_database_write_command_with_opts or mongoc_collection_write_command_with_opts. See the MongoDB Manual entry for the createIndexes command for details.