$direction = $session->getArgDirection( $class, $operation, $argname )
The getArgDirection() function gets a flag to indicate whether the specified operation argument is an IN or OUT argument:
IN arguments are denoted by the value 0 and refer to argument values passed from the script to the Domain Manager.
OUT arguments are denoted by the value 1 and refer to variables into which the operation puts result information.
Nearly all arguments to all operations of all classes are IN arguments.Note:
OUT arguments are not supported by the remote access protocol, which is beyond the scope of the API, dmctl, and ASL.
$direction = $session->getArgDirection( "Router", "getFan", "identifier" );