The class was never functional and now it was removed in GemStone 3.3:
Warning: This package depends on the following classes:
Process
You must resolve these dependencies before you will be able to load these definitions:
Process>>properties
Loaded -> Grease-GemStone-Core-dkh.56 --- filetree:///opt/git/Grease/repository [6a76165:dev] --- cache
Can afford to just remove the method completely ...