public function getUserCustomerRelations($criteria = null, PropelPDO $con = null)
    {
        $partial = $this->collUserCustomerRelationsPartial && !$this->isNew();
        if (null === $this->collUserCustomerRelations || null !== $criteria  || $partial) {
            if ($this->isNew() && null === $this->collUserCustomerRelations) {
                // return empty collection
                $this->initUserCustomerRelations();
            } else {
                $collUserCustomerRelations = UserCustomerRelationQuery::create(null, $criteria)
                    ->filterByUser($this)
                    ->find($con);
                if (null !== $criteria) {
                    if (false !== $this->collUserCustomerRelationsPartial && count($collUserCustomerRelations)) {
                      $this->initUserCustomerRelations(false);

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

                      $this->collUserCustomerRelationsPartial = true;
                    }

                    $collUserCustomerRelations->getInternalIterator()->rewind();

                    return $collUserCustomerRelations;
                }

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

                $this->collUserCustomerRelations = $collUserCustomerRelations;
                $this->collUserCustomerRelationsPartial = false;
            }
        }

        return $this->collUserCustomerRelations;
    }