/**
  * @param      int $metadataProfileId
  * @param      string $key
  * @param      PropelPDO $con the connection to use
  * @return     MetadataProfileField
  */
 public static function retrieveByMetadataProfileAndKey($metadataProfileId, $key, PropelPDO $con = null)
 {
     $criteria = new Criteria();
     $criteria->add(MetadataProfileFieldPeer::METADATA_PROFILE_ID, $metadataProfileId);
     $criteria->add(MetadataProfileFieldPeer::KEY, $key);
     return MetadataProfileFieldPeer::doSelectOne($criteria, $con);
 }