@Override
      public ImmutablePerson next() {
        if (!hasNext()) {
          throw new NoSuchElementException("At index " + index + " while size is " + size);
        }
        return get(index++);
      }
Returns an iterator over generated entries. Number of elements depends on
internal constants like {@link #FIRST_NAMES}.

@return iterator with valid entries
criteria/common/test/org/immutables/criteria/personmodel/PersonGenerator.java