public function getPersonImages($criteria = null, ConnectionInterface $con = null)
    {
        $partial = $this->collPersonImagesPartial && !$this->isNew();
        if (null === $this->collPersonImages || null !== $criteria  || $partial) {
            if ($this->isNew() && null === $this->collPersonImages) {
                // return empty collection
                $this->initPersonImages();
            } else {
                $collPersonImages = ChildPersonImageQuery::create(null, $criteria)
                    ->filterByPerson($this)
                    ->find($con);

                if (null !== $criteria) {
                    if (false !== $this->collPersonImagesPartial && count($collPersonImages)) {
                        $this->initPersonImages(false);

                        foreach ($collPersonImages as $obj) {
                            if (false == $this->collPersonImages->contains($obj)) {
                                $this->collPersonImages->append($obj);
                            }
                        }

                        $this->collPersonImagesPartial = true;
                    }

                    reset($collPersonImages);

                    return $collPersonImages;
                }

                if ($partial && $this->collPersonImages) {
                    foreach ($this->collPersonImages as $obj) {
                        if ($obj->isNew()) {
                            $collPersonImages[] = $obj;
                        }
                    }
                }

                $this->collPersonImages = $collPersonImages;
                $this->collPersonImagesPartial = false;
            }
        }

        return $this->collPersonImages;
    }