     @enum {string}
   ###
   @CLS:
-    HIDDEN: 'hidden'
+    OPEN: 'open'
 
   ###*
     @param {Object} params

    @override
    @param {Element} element
  ###
  decorateInternal: (element) ->
    toggleId = goog.dom.dataset.get element, 'toggle'
    @toggleElement = @dom.one "##{toggleId}"

    ###
      Do not use ACTION event as propagation must be stopped. If you would stop
      propagation on ACTION event, CLICK event would be fired on body and popup

  ###
  toggle: ->
    if @shown
      goog.dom.classes.add @element, wzk.ui.popup.Popup.CLS.OPEN
    else
      goog.dom.classes.remove @element, wzk.ui.popup.Popup.CLS.OPEN
