UML14 — UML 2 Super/Activities/assocition end specialization consistency

ActivityGroup::edgeContents and ActivityGroup::nodeContents are redefined by subclasses ActivityPartition (Figure 183), InterruptibleActivityRegion (Figure 191), and StructuredActivityNode (Figure 192), but the opposites of these properties are subsetted instead. Would make more sense to apply either redefinition or subset constraints to both ends of the associations rather than a mixture of both?

see above