Can't refresh domain class instance from the database in statefull mode

I'm creating this issue after failing to find a solution from [Stackoverflow](https://stackoverflow.com/questions/64083488/how-to-refresh-object-from-database-unsing-gorm-for-mongodb).

Since the `refresh` method is not implemented on Gorm for Mongo and the method `get(id)` would return the same cached instance, is it possible to refresh a domain class instance from the database?

The issue names GORM for Mongo's refresh and get methods in stateful mode, but no source files or tests. Start by reproducing the cached-instance behavior and tracing those entry points; done requires resolving whether database refresh is supported, with behavior covered by an appropriate test or documented limitation.

Written by the indexing model from the issue text.