A change to support multiple versions of the bson module concurrently led to the use of duck typing the ObjectId type. In this situations we cannot depend strictly on duck-typing, but must ensure values exists and are the correct type before attempting to use them, lest we experience {{TypeError}}s

• https://github.com/mongodb/js-bson/blob/master/lib/objectid.js#L88
• https://github.com/mongodb/js-bson/blob/master/lib/objectid.js#L341