"wx.Sizer is the abstract base class used for laying out subwindows in
a window. You cannot use wx.Sizer directly; instead, you will have to
use one of the sizer classes derived from it such as `wx.BoxSizer`,
-`wx.StaticBoxSizer`, `wx.NotebookSizer`, `wx.GridSizer`, `wx.FlexGridSizer`
-and `wx.GridBagSizer`.
+`wx.StaticBoxSizer`, `wx.GridSizer`, `wx.FlexGridSizer` and
+`wx.GridBagSizer`.
The concept implemented by sizers in wxWidgets is closely related to
layout tools in other GUI toolkits, such as Java's AWT, the GTK