--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/vendor/sabre/vobject/lib/Component/VTimeZone.php	Sat Jan 13 09:06:10 2018 -0500
@@ -0,0 +1,67 @@
+<?php
+
+namespace Sabre\VObject\Component;
+
+use Sabre\VObject;
+
+/**
+ * The VTimeZone component
+ *
+ * This component adds functionality to a component, specific for VTIMEZONE
+ * components.
+ *
+ * @copyright Copyright (C) 2011-2015 fruux GmbH (https://fruux.com/).
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class VTimeZone extends VObject\Component {
+
+    /**
+     * Returns the PHP DateTimeZone for this VTIMEZONE component.
+     *
+     * If we can't accurately determine the timezone, this method will return
+     * UTC.
+     *
+     * @return \DateTimeZone
+     */
+    function getTimeZone() {
+
+        return VObject\TimeZoneUtil::getTimeZone((string)$this->TZID, $this->root);
+
+    }
+
+    /**
+     * A simple list of validation rules.
+     *
+     * This is simply a list of properties, and how many times they either
+     * must or must not appear.
+     *
+     * Possible values per property:
+     *   * 0 - Must not appear.
+     *   * 1 - Must appear exactly once.
+     *   * + - Must appear at least once.
+     *   * * - Can appear any number of times.
+     *
+     * @var array
+     */
+    function getValidationRules() {
+
+        return array(
+            'TZID' => 1,
+
+            'LAST-MODIFICATION' => '?',
+            'TZURL' => '?',
+
+            // At least 1 STANDARD or DAYLIGHT must appear, or more. But both
+            // cannot appear in the same VTIMEZONE.
+            //
+            // The validator is not specific yet to pick this up, so these
+            // rules are too loose.
+            'STANDARD' => '*',
+            'DAYLIGHT' => '*',
+        );
+
+    }
+
+}
+