/**
  * Adds an object to the instance pool.
  *
  * Propel keeps cached copies of objects in an instance pool when they are retrieved
  * from the database. In some cases you may need to explicitly add objects
  * to the cache in order to ensure that the same objects are always returned by find*()
  * and findPk*() calls.
  *
  * @param \LegacyProductAttributes\Model\LegacyCartItemAttributeCombination $obj A \LegacyProductAttributes\Model\LegacyCartItemAttributeCombination object.
  * @param string $key             (optional) key to use for instance map (for performance boost if key was already calculated externally).
  */
 public static function addInstanceToPool($obj, $key = null)
 {
     if (Propel::isInstancePoolingEnabled()) {
         if (null === $key) {
             $key = serialize(array((string) $obj->getCartItemId(), (string) $obj->getAttributeId()));
         }
         // if key === null
         self::$instances[$key] = $obj;
     }
 }
 /**
  * Exclude object from result
  *
  * @param   ChildLegacyCartItemAttributeCombination $legacyCartItemAttributeCombination Object to remove from the list of results
  *
  * @return ChildLegacyCartItemAttributeCombinationQuery The current query, for fluid interface
  */
 public function prune($legacyCartItemAttributeCombination = null)
 {
     if ($legacyCartItemAttributeCombination) {
         $this->addCond('pruneCond0', $this->getAliasedColName(LegacyCartItemAttributeCombinationTableMap::CART_ITEM_ID), $legacyCartItemAttributeCombination->getCartItemId(), Criteria::NOT_EQUAL);
         $this->addCond('pruneCond1', $this->getAliasedColName(LegacyCartItemAttributeCombinationTableMap::ATTRIBUTE_ID), $legacyCartItemAttributeCombination->getAttributeId(), Criteria::NOT_EQUAL);
         $this->combine(array('pruneCond0', 'pruneCond1'), Criteria::LOGICAL_OR);
     }
     return $this;
 }