@Override
 protected void doFilter(String fieldId, Collection c) {
   if (Hibernate.isInitialized(c)) {
     super.doFilter(fieldId, c);
   }
 }
 @Override
 protected void doFilter(String fieldId, Filterable f) {
   if (Hibernate.isInitialized(f)) {
     super.doFilter(fieldId, f);
   }
 }