     options                  = @getOptions()
     containerSize            = @tabHandleContainer.$().outerWidth(no) - options.lastTabHandleMargin
     containerMarginInPercent = 100 * options.lastTabHandleMargin / containerSize
-    
+
     for handle in @handles when not handle.isHidden()
       visibleHandles.push handle
       visibleTotalSize += handle.$().outerWidth no

        title   : paneInstance.options.name
        hidden  : paneInstance.options.hiddenHandle
        view    : paneInstance.options.tabHandleView
      paneInstance.tabHandle = newTabHandle
      @listenTo
        KDEventTypes : "click"

    options.maxHandleWidth      ?= 128
    options.minHandleWidth      ?= 30
    options.lastTabHandleMargin ?= 0
    options.sortable            ?= no
    @handles                     = []
    @panes                       = []
    @selectedIndex               = []
