@Override
public void addReference(Tree.TreeAlternative reference) {
if (super.getReference() != null) {
throw new InternalException("addReference shouldn't be used twice");
}
super.addReference(reference);
}
public ImplicitNewElement(
Tree.TreeAlternative reference,
Grammar grammar,
List<AlternativeTransformationElement> transformationElements) {
super(grammar);
if (transformationElements == null) {
throw new InternalException("transformationElements may not be null");
}
if (reference == null) {
throw new InternalException("reference may not be null");
}
super.addReference(reference);
this.transformationElements = transformationElements;
}