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administrator/components/com_contenthistory/helpers/contenthistory.php

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+<?php
+
+/**
+ * @package     Joomla.Administrator
+ * @subpackage  com_contenthistory
+ *
+ * @copyright   (C) 2013 Open Source Matters, Inc. <https://www.joomla.org>
+ * @license     GNU General Public License version 2 or later; see LICENSE.txt
+ *
+ * @phpcs:disable PSR1.Classes.ClassDeclaration.MissingNamespace
+ */
+
+// phpcs:disable PSR1.Files.SideEffects
+\defined('_JEXEC') or die;
+// phpcs:enable PSR1.Files.SideEffects
+
+/**
+ * Categories helper.
+ *
+ * @since       3.2
+ *
+ * @deprecated  4.3 will be removed in 6.0
+ *              Use \Joomla\Component\Contenthistory\Administrator\Helper\ContenthistoryHelper instead
+ */
+class ContenthistoryHelper extends \Joomla\Component\Contenthistory\Administrator\Helper\ContenthistoryHelper
+{
+}