+
+ @Override
+ public Collection<MustDefinition> getMustConstraints() {
+ return ImmutableSet.of();
+ }
+
+ @Override
+ public Optional<? extends QualifiedBound> getWhenCondition() {
+ return Optional.empty();
+ }
+
+ @Override
+ public AnyxmlEffectiveStatement asEffectiveStatement() {
+ throw new UnsupportedOperationException();
+ }