<?php

class Qs_Exception_EmptyPropertyException extends Exception
{
    /**
     * @param object $instance
     * @param string $propertyName
     */
    public function __construct($instance, $propertyName)
    {
        $class = get_class($instance);
        $message = "Required property '{$class}->{$propertyName}' is missing";
        return parent::__construct($message);
    }
}