wxNotebook question

[Gandalf]

How can I hide/show a page (wxNotebookPage) invisible of a wx.wxNotebook
instance?
There is a GetPage() method which returns a wxNotebookPage but I could
not find
any documentation in the help about this class. I thought there will be
a 'SetVisible'
or 'SetTabvisible' method but it seems to be a proxy for the root
control on that page.
So I cannot even get method names by dir(self.notebook.GetPage(0)).

Thanks in advance