<<rule>> Delete: Multiplicity-One Bidirectional Self-Reference
<<preserve>>
fromContainerClass : EClass
<<preserve>>
fromOppositeReference : EReference
<<delete>>
oldMultiplicityOneReference : EReference
<<delete>> upperBound = "1"
<<delete>>
eOpposite
<<delete>>
eType
<<delete>>
eOpposite
<<delete>>
eContainingClass
eStructuralFeatures