In XxxBean_Roo_ManagedBean.aj, the completeYyy(java.lang.String query) method calls EntityManager#toString

project --topLevelPackage com.example
jpa setup --database HYPERSONIC_IN_MEMORY --provider HIBERNATE 
entity jpa --class ~.domain.Thing
field string name
web jsf setup 
web jsf all --package ~.web
entity jpa --class ~.domain.Owner
focus --class ~.domain.Thing
field reference --fieldName owner --type ~.domain.Owner

public List<Owner> ThingBean.completeOwner(java.lang.String query) {
        List<Owner> suggestions = new ArrayList<Owner>();
        for (Owner owner : Owner.findAllOwners()) {
            String ownerStr = owner.getEntityManager() +  " "  + owner.getId() +  " "  + owner.getVersion();
            if (ownerStr.toLowerCase().startsWith(query.toLowerCase())) {
                suggestions.add(owner);
            }
        }
        return suggestions;
}