/**
  * Filter the query by a related LeasingEventLeads object
  *
  * @param   LeasingEventLeads|PropelObjectCollection $leasingEventLeads  the related object to use as filter
  * @param     string $comparison Operator to use for the column comparison, defaults to Criteria::EQUAL
  *
  * @return                 LeasingNationalityQuery The current query, for fluid interface
  * @throws PropelException - if the provided filter is invalid.
  */
 public function filterByLeasingEventLeads($leasingEventLeads, $comparison = null)
 {
     if ($leasingEventLeads instanceof LeasingEventLeads) {
         return $this->addUsingAlias(LeasingNationalityPeer::ID, $leasingEventLeads->getNationalityId(), $comparison);
     } elseif ($leasingEventLeads instanceof PropelObjectCollection) {
         return $this->useLeasingEventLeadsQuery()->filterByPrimaryKeys($leasingEventLeads->getPrimaryKeys())->endUse();
     } else {
         throw new PropelException('filterByLeasingEventLeads() only accepts arguments of type LeasingEventLeads or PropelCollection');
     }
 }