// TODO can we speed this up?
 public boolean hasConstructorChanged(int ctorId) {
   // need to find the constructor that id is for
   MethodMember mm = typeDescriptor.getConstructor(ctorId);
   return hasConstructorChanged(mm);
 }
 public boolean hasConstructorChanged(String descriptor) {
   MethodMember mm = typeDescriptor.getConstructor(descriptor);
   return hasConstructorChanged(mm);
 }