"valueOf",
}));
public void completeProperty_Prop(Application model, Assignment assignment, ContentAssistContext context, ICompletionProposalAcceptor acceptor) {
super.completeProperty_Prop(model, assignment, context, acceptor);
IdRef idRef = (IdRef)model.getValue();
String idName = idRef.getVal().getName();
// TODO: if idName is null, no reference was found
Set<String> proposals = builtins.getCompletions(idName);
if (proposals.isEmpty()) {
proposals = COMMON_FEATURES;
}