accept(new CheckRequiredProvidedMultiplicityVisitor(this));
accept(new CheckExternallyRequiredVisitor(this));
accept(new CheckExternallyProvidedVisitor(this));
accept(new CheckRequiredProvidedMultiplicityVisitor(this));
accept(new CheckExternallyRequiredVisitor(this));
accept(new CheckExternallyProvidedVisitor(this));