src/Easy/Element/Element.php
public function getParameter($eventHandlerName){
    	$formObj = $this->getFormObj();
        $eventHandler = $this->eventHandlers->get($eventHandlerName);
        if (!$eventHandler) return null;
        //echo $evthandler->redirectPage."<br>";
        return Expression::evaluateExpression($eventHandler->parameter, $formObj);
    }
public function getParameter($eventHandlerName){
    	$formObj = $this->getFormObj();
        $eventHandler = $this->eventHandlers->get($eventHandlerName);
        if (!$eventHandler) return null;
        //echo $evthandler->redirectPage."<br>";
        return Expression::evaluateExpression($eventHandler->parameter, $formObj);
    }
Get parameter

@param string $eventHandlerName
@return mixed