Add the Chronological

vendor/sabre/xml/lib/Element.php

@@ -0,0 +1,22 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Sabre\Xml;
+
+/**
+ * This is the XML element interface.
+ *
+ * Elements are responsible for serializing and deserializing part of an XML
+ * document into PHP values.
+ *
+ * It combines XmlSerializable and XmlDeserializable into one logical class
+ * that does both.
+ *
+ * @copyright Copyright (C) 2009-2015 fruux GmbH (https://fruux.com/).
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+interface Element extends XmlSerializable, XmlDeserializable
+{
+}