<<rule>> Delete: Bidirectional Self-Reference
<<preserve>>
fromContainerClass : EClass
<<preserve>>
fromOppositeReference : EReference
<<delete>> containment = "false"
<<create>> containment = oppositeReference_containment
<<delete>>
oldMultiplicityManyReference : EReference
<<delete>> containment = "false"
<<delete>>
eOpposite
<<delete>>
eType
<<delete>>
eOpposite
<<delete>>
eContainingClass
eStructuralFeatures