@Override
    protected List<IEObjectDescription> computeExportedObjects()
    {
        [...]
        while (allProperContents.hasNext())
        {
            EObject content = allProperContents.next();

            // ignore certain objects
            if (objectsToIgnore.contains(content))
                continue;

            // add objects to ignore list because we handle them ourselves
            if (content instanceof ExistingEntityType)
            {
                existingTypeDeclarations.add((ExistingEntityType) content);
                Iterator<EObject> it = EcoreUtil.getAllProperContents(content, false);
                while (it.hasNext())
                    objectsToIgnore.add(it.next());
            }

            // business as usual
            if (!strategy.createEObjectDescriptions(content, acceptor))
                allProperContents.prune();
        }

        // find entity types to be exported
        [...]

        // export them
        for (String entityTypeName : toRead)
        {
            EntityType et = Utils.getEntityType(entityTypeName);
            // Wrap it <------ EntityTypeWrapper implements the EObject interface generated by Xtext
            // every entity type has a "singleton" wrapper. it always gets the same wrapper when asking getInstance()
            EntityTypeWrapper wrapper = EntityTypeWrapper.getInstance(typeToParent.get(entityTypeName), et);

            // Dangling Object prevention
            if (!getResource().getContents().contains(wrapper))
                getResource().getContents().add(wrapper);

            exportedEObjects.add(new EObjectDescription(QualifiedName.create(entityTypeName), wrapper, null));
            for (EntityTypeAttribute eta : wrapper.getAttributes())
                exportedEObjects.add(new EObjectDescription(QualifiedName.create(et.name, eta.getName()), eta, null));
        }

        return exportedEObjects;
    }