How to use the cefpython3.cefpython.WindowUtils.OnSetFocus function in cefpython3

def OnFocusIn(self, widget, data):
        # This function is currently not called by any of code, but if you would like
        # for browser to have automatic focus add such line:
        # self.mainWindow.connect('focus-in-event', self.OnFocusIn)
        cefpython.WindowUtils.OnSetFocus(self.container.get_window().handle, 0, 0, 0)

def on_set_focus(self, event):
        """OS_WIN only."""
        cefpython.WindowUtils.OnSetFocus(self.GetHandle(), 0, 0, 0)
        event.Skip()

def focusInEvent(self, event):
        cefpython.WindowUtils.OnSetFocus(int(self.centralWidget().winIdFixed()), 0, 0, 0)

def OnSetFocus(self, event):
        """OS_WIN only."""
        cefpython.WindowUtils.OnSetFocus(self.GetHandle(), 0, 0, 0)
        event.Skip()

def OnSetFocus(self, event):
        cefpython.WindowUtils.OnSetFocus(self.GetHandleForBrowser(), 0, 0, 0)

def on_set_focus(self, event):
        cef.WindowUtils.OnSetFocus(self.Handle, 0, 0, 0)
        event.Skip()

def focusInEvent(self, event):
        cefpython.WindowUtils.OnSetFocus(int(self.centralWidget().winId()), 0, 0, 0)

def OnSetFocus(self, event):
        cefpython.WindowUtils.OnSetFocus(self.GetHandleForBrowser(), 0, 0, 0)