RESULT = $session->getByKeyf( $object, $table, [ $keytype, $keyvalue ], $freshness )
Identical to getByKey() but takes the “freshness” of the entry into account. The section “$freshness” on page 73 provides additional information.
@driver = $session->getByKeyf( "GA_CompoundDriver::Bridge-Generic-Driver", "drivers", [ "INT", 10 ], 120 );