/**
  * Get the associated ChildInvTypes object
  *
  * @param  ConnectionInterface $con Optional Connection object.
  * @return ChildInvTypes The associated ChildInvTypes object.
  * @throws PropelException
  */
 public function getInvTypes(ConnectionInterface $con = null)
 {
     if ($this->aInvTypes === null && $this->typeid !== null) {
         $this->aInvTypes = ChildInvTypesQuery::create()->findPk($this->typeid, $con);
         // Because this foreign key represents a one-to-one relationship, we will create a bi-directional association.
         $this->aInvTypes->setInvMetaTypes($this);
     }
     return $this->aInvTypes;
 }