minor fix to typedef/using
progress on Iterator/Owner refactoring work - so we can keep iteratorreps iwth teh right onwner on cloning - vector all copies/assignemnts of patchable backendDataStructures through AssignFrom and start losing operator= and X(&X&) ctors from backend data strucutre patchable containers and from the concrete container reps (they will use a special ctor for cloning soon)