/**
  * Exclude object from result
  *
  * @param   ChildOrder $order Object to remove from the list of results
  *
  * @return $this|ChildOrderQuery The current query, for fluid interface
  */
 public function prune($order = null)
 {
     if ($order) {
         $this->addUsingAlias(OrderTableMap::COL_ID, $order->getId(), Criteria::NOT_EQUAL);
     }
     return $this;
 }