function activate_xliff()
 {
     $message = __('XLIFF is now included in WPML\'s Translation Management. Please deactivate and uninstall XLIFF Plugin, in order to use the new xliff features.', 'wpml-translation-management');
     $args = array('id' => 'wpml_xliff_legacy', 'group' => 'translation_management_modules_check', 'msg' => $message, 'type' => 'error', 'admin_notice' => true, 'hide' => false);
     if (defined("WPML_XLIFF_VERSION") && WPML_XLIFF_VERSION < '0.9.8') {
         if (is_admin()) {
             ICL_AdminNotifier::add_message($args);
         }
     } else {
         if ($this->is_module_valid("WPML_Translation_Management_XLIFF", $args)) {
             if (is_admin()) {
                 $this->remove_message_by_id("wpml_xliff_legacy");
             }
             WPML_Translation_Management_XLIFF::get_instance();
         }
     }
 }