<<rule>> Create: Multiplicity-Many Containment Reference

<<preserve>> toContainedClass : EClass <<preserve>> toContainerClass : EClass <<create>> newContainmentReference : EReference <<create>> unique = "true" <<create>> upperBound = value > 1 <<create>> containment = "true" <<forbid, post>> postContainerReference : EReference <<create>> eType <<forbid, post>> eOpposite <<forbid, post>> eOpposite <<create>> eContainingClass eStructuralFeatures