* @uses mw.Upload
* @uses mw.Upload.BookletLayout
* @extends OO.ui.ProcessDialog
+ *
+ * @constructor
+ * @param {Object} [config] Configuration options
* @cfg {Function} [bookletClass=mw.Upload.BookletLayout] Booklet class to be
* used for the steps
* @cfg {Object} [booklet] Booklet constructor configuration