WebView.GetNativeBackend

Hello!
In wxPython 2.8 I used hack to use gtkwebkit (http://wiki.wxpython.org/wxGTKWebKit). Now I begin to use wxPython 3.0 with wx.html2.WebView. The method GetNativeBackend is described in the documentation but GetNativeBackend returns empty pySwigObject.

Can I get native backend?