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