getOptions method
When a writeConcern is given a Db object must be specified
Implementation
Map<String, Object> getOptions(Db db) {
return <String, Object>{
if (writeConcern != null)
keyWriteConcern: writeConcern!.asMap(db.masterConnection.serverStatus),
if (!ordered) keyOrdered: ordered,
if (comment != null) keyComment: comment!
};
}