reactivemongo.api.ChangeStreams.FullDocumentStrategy
In this strategy, in addition to the default behavior, Update change events will be joined with the *current* version of the related document (which is thus not necessarily the value at the time of the event).
In this strategy, in addition to the default behavior, Update change events will be joined with the *current* version of the related document (which is thus not necessarily the value at the time of the event).