 	$tabButtons = {}
 
 	buttons = new ReactiveVar {}
+
+	extraGroups = {}
 
 	animating = false
 	open = new ReactiveVar false

	getVisibleGroup = ->
		visibleGroup.get()

	setTemplate: setTemplate
	setData: setData
	getTemplate: getTemplate


	showGroup: showGroup
	getVisibleGroup: getVisibleGroup
	addGroup: addGroup
