@Test
    def void testSimpleSubclassingExtension() {
        // Create an Organization
        val organization = pb.organization.name("Axway").build

        // Create Organization EClass subclass named DynamicEClass in a new EPackage(extended) 
        val account = eb.eAttribute.name("account").eType(EcorePackage.Literals.ESTRING).build
        val dynamicEClass = eb.eClass.name("DynamicEClass").eStructuralFeatures(account).eSuperTypes(ParticipantPackage.eINSTANCE.organization).build
        val extendedPackage = eb.ePackage.name("extended").eClassifiers(dynamicEClass).build

        // Create an instance of the "extendedOrganization"
        val extendedOrganization = extendedPackage.EFactoryInstance.create(dynamicEClass)

        organization.eClass.EAllStructuralFeatures.forEach [
            extendedOrganization.eSet(it, organization.eGet(it))
        ]

        // Set value for the extension
        extendedOrganization.eSet(account, "an account")
        assertEquals("an account", ms.oclEvaluate("self.account", extendedOrganization))

        extendedOrganization.eSet(account, "another account")
        assertEquals("another account", ms.oclEvaluate("self.account", extendedOrganization))
    }