| Class | VersionTests | Undocumented | 
| Class | VersionedSubClass | Undocumented | 
| Class | SecondVersionedSubClass | Undocumented | 
| Class | VersionedSubSubClass | Undocumented | 
| Class | VersionedDiamondSubClass | Undocumented | 
| Class | AybabtuTests | styles._aybabtugets all of classes in the inheritance hierarchy of its argument that are 
strictly betweenVersionedand the class itself. | 
| Class | MyEphemeral | Undocumented | 
| Class | EphemeralTests | Undocumented | 
| Class | Pickleable | Undocumented | 
| Class | NotPickleable | A class that is not pickleable. | 
| Class | CopyRegistered | A class that is pickleable only because it is registered with the copyregmodule. | 
| Class | CopyRegisteredLoaded | CopyRegisteredafter unserialization. | 
| Function | reduceCopyRegistered | Externally implement __reduce__forCopyRegistered. | 
| Class | A | dummy class | 
| Class | B | dummy class | 
| Function | funktion | Undocumented | 
| Class | PicklingTests | Test pickling of extra object types. | 
| Class | StringIOTransitionTests | When pickling a cStringIO in Python 2, it should unpickle as a BytesIO or a StringIO in Python 3, depending on the type of its contents. | 
| Class | EvilSourceror | Undocumented | 
| Class | NonDictState | Undocumented | 
| Class | AOTTests | No class docstring; 4/9 methods documented | 
| Class | CrefUtilTests | Tests for crefutil. | 
Externally implement __reduce__ for CopyRegistered.
| Parameters | cr | The CopyRegisteredinstance. | 
| Returns | a 2-tuple of callable and argument list, in this case CopyRegisteredLoadedand no arguments. | |