Since I wanted to store my documents using an UUID instead the native Mongo ID object, I found quickly the pkFactory configuration parameter

As a user of custom UUID objects, I found two problems that were hard to solve. I believe mentioning these in the documentation would be useful.

1. Serialization. This one is easy to solve. Just add a .toJSON() function

2. Deserialization. I am stuck here. I am casting to my own UUID class manually. However the driver can notice Binary.SUBTYPE_UUID objects.

A configuration parameter taking the constructor method for a custom UUID class would greatly reduce the burden for a programmer.