--- /dev/null
+<?php
+/**
+ * Zend Framework (http://framework.zend.com/)
+ *
+ * @link http://github.com/zendframework/zf2 for the canonical source repository
+ * @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license http://framework.zend.com/license/new-bsd New BSD License
+ */
+
+namespace Zend\Stdlib;
+
+interface ParameterObjectInterface
+{
+ /**
+ * @param string $key
+ * @param mixed $value
+ * @return void
+ */
+ public function __set($key, $value);
+
+ /**
+ * @param string $key
+ * @return mixed
+ */
+ public function __get($key);
+
+ /**
+ * @param string $key
+ * @return bool
+ */
+ public function __isset($key);
+
+ /**
+ * @param string $key
+ * @return void
+ */
+ public function __unset($key);
+}