protected internal DockPane(IDockContent content, FloatWindow floatWindow, bool show)
        {
            if (floatWindow == null)
                throw new ArgumentNullException("floatWindow");

            InternalConstruct(content, DockState.Float, false, Rectangle.Empty, floatWindow.NestedPanes.GetDefaultPreviousPane(this), DockAlignment.Right, 0.5, show);
        }

        internal void RemoveFloatWindow(FloatWindow floatWindow)
        {
            if (!FloatWindows.Contains(floatWindow))
                return;

            FloatWindows.Remove(floatWindow);
            if (FloatWindows.Count != 0)
                return;

            if (ParentForm == null) 
                return;

            ParentForm.Focus();
        }

        internal void AddFloatWindow(FloatWindow floatWindow)
        {
            if (FloatWindows.Contains(floatWindow))
                return;

            FloatWindows.Add(floatWindow);
        }

 public DockPane CreateDockPane(IDockContent content, FloatWindow floatWindow, bool show)
 {
     return new DockPane(content, floatWindow, show);
 }

		internal void RemoveFloatWindow(FloatWindow floatWindow)
		{
			if (!FloatWindows.Contains(floatWindow))
				return;

			FloatWindows.Remove(floatWindow);
		}

 public FloatingWindow(FloatWindow floatWindow)
 {
     _floatWindow = floatWindow;
 }

 public VS2013DockPane(IDockContent content, FloatWindow floatWindow, bool show)
     : base(content, floatWindow, show)
 {
 }

 internal void RemoveFloatWindow(FloatWindow floatWindow)
 {
     if(!this.FloatWindows.Contains(floatWindow)){
         return;
     }
     this.FloatWindows.Remove(floatWindow);
 }

 internal void AddFloatWindow(FloatWindow floatWindow)
 {
     if(this.FloatWindows.Contains(floatWindow)){
         return;
     }
     this.FloatWindows.Add(floatWindow);
 }