/**
  * Filter the query by a related LeasingUnit object
  *
  * @param   LeasingUnit|PropelObjectCollection $leasingUnit The related object(s) to use as filter
  * @param     string $comparison Operator to use for the column comparison, defaults to Criteria::EQUAL
  *
  * @return                 LeasingUnitFeaturesQuery The current query, for fluid interface
  * @throws PropelException - if the provided filter is invalid.
  */
 public function filterByLeasingUnit($leasingUnit, $comparison = null)
 {
     if ($leasingUnit instanceof LeasingUnit) {
         return $this->addUsingAlias(LeasingUnitFeaturesPeer::UNIT_ID, $leasingUnit->getId(), $comparison);
     } elseif ($leasingUnit instanceof PropelObjectCollection) {
         if (null === $comparison) {
             $comparison = Criteria::IN;
         }
         return $this->addUsingAlias(LeasingUnitFeaturesPeer::UNIT_ID, $leasingUnit->toKeyValue('PrimaryKey', 'Id'), $comparison);
     } else {
         throw new PropelException('filterByLeasingUnit() only accepts arguments of type LeasingUnit or PropelCollection');
     }
 }