BaseClassListNE: `SubClassRef` ("," `SubClassRef`)*
SubClassRef: (`ClassID` | `MultiClassID`) ["<" `ValueList` ">"]
DefmID: `TokIdentifier`
BaseClassListNE: `SubClassRef` ("," `SubClassRef`)*
SubClassRef: (`ClassID` | `MultiClassID`) ["<" `ValueList` ">"]
DefmID: `TokIdentifier`