public function __construct($oCaller, $sWidgetTitle, array $aArguments = array())
{
$aArguments = $aArguments + array('classname' => 'admin_page_framework_widget', 'description' => '');
parent::__construct($oCaller->oProp->sClassName, $sWidgetTitle, $aArguments);
$this->oCaller = $oCaller;
}