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