RESULT = $session->getByKey( $object, $table,
     [ $keytype, $keyvalue ] )

The getByKey() function gets the entry in the named table from the object, indexed by its key.

Tables are properties that can contain arrays of values.

 @driver = $session->getByKey(
   "GA_CompoundDriver::Bridge-Generic-Driver",
   "drivers", [ "INT", 10 ] );