/**
* Set dummy callback so that filterMarking() is triggered.
*
* @param String $name
* @param String $title
* @param String $sourceObject
* @param String $keyField
* @param String $labelField
*/
function __construct($name, $title, $sourceObject = "Group", $keyField = "ID", $labelField = "Title")
{
parent::__construct($name, $title, $sourceObject, $keyField, $labelField);
$this->value = 'unchanged';
$this->filterCallback = 'dummyTrigger';
}
