This requires a definition for an association rather than
the named association end. While there is some
justification for this, we prefer the practice of adding a
definition for the named associated end; the latter is
better aligned with programming language
implementations, where the defined association end (not
the association) will become a property.
Require definition for association end rather than
Changed, when model is changed (with few afford, if possible)
Issues withdrawn due to EA limitation.