Cannot get PanelManager to load in WAB app

JustinBridwell2

I am trying to utilize PanelManager in my WAB widget. My WAB version is very old (1.2). I am trying to add it as follows:

define([
//dojo AMD modules
...

//dojox AMD modules
..

//dGrid AMD modules
...

//dijit AMD modules
...

//esri AMD modules
...

//jimu web appbuilder AMD modules
'jimu/BaseWidget',
'jimu/utils',
'jimu/WidgetManager'
'jimu/ PanelManager '

],
function (
//dojo AMD modules
...

//dojox AMD modules
...

//dgrid AMD modules
...

//dijit AMD modules
...

//esri AMD modules
...

//jimu web appbuilder AMD modules
BaseWidget,
utils,
...

WidgetManager
PanelManager

) {

// Code goes her

Notice that there are spaces when I add 'jimu/ PanelManager '. This is exactly the way the documentation