InterpreterProxy>>isIndexable: oop appears to operate inconsistently 
with its ObjectMemory counterpart, operating directly on classes 
rather than on instances of the classes, as do its counterparts 
isWords, etc.  Perhaps it should be rendered thus:


InterpreterProxy>>isIndexable: oop
	^oop class isVariable

instead of the present:

InterpreterProxy>>isIndexable: oop
	^oop isVariable

?