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