}

    private BindingPredicate mapSubject(ModelReference<?> subjectReference, ModelActionRole role) {
        if (!role.isSubjectViewAvailable() && !subjectReference.isUntyped()) {
            throw new IllegalStateException(String.format("Cannot bind subject '%s' to role '%s' because it is targeting a type and subject types are not yet available in that role", subjectReference, role));
        }