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

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

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

def on_size(self, event):
        if not self.browser or self.hidden:
            return
        if platform.system() == "Windows":
            cef.WindowUtils.OnSize(self.Handle, 0, 0, 0)
        else:
            (x, y) = (0, 0)
            (width, height) = event.GetSize()
            self.browser.SetBounds(x, y, width, height)
        self.browser.NotifyMoveOrResizeStarted()

def on_size(self, event):
        """OS_WIN only. Handle the the size event"""
        cefpython.WindowUtils.OnSize(self.GetHandle(), 0, 0, 0)
        event.Skip()

def OnSize(self, widget, sizeAlloc):
        cefpython.WindowUtils.OnSize(self.container.get_window().handle, 0, 0, 0)

def OnSize(self, _):
        if not self.browser:
            return
        if WINDOWS:
            cef.WindowUtils.OnSize(self.browser_panel.GetHandle(),
                                   0, 0, 0)
        elif LINUX:
            (x, y) = (0, 0)
            (width, height) = self.browser_panel.GetSize().Get()
            self.browser.SetBounds(x, y, width, height)
        self.browser.NotifyMoveOrResizeStarted()

def OnSize(self, _):
        if not self.browser:
            return
        if WINDOWS:
            cef.WindowUtils.OnSize(self.browser_panel.GetHandle(),
                                   0, 0, 0)
        elif LINUX:
            (x, y) = (0, 0)
            (width, height) = self.browser_panel.GetSize().Get()
            self.browser.SetBounds(x, y, width, height)
            self.sw.get_window().move_resize(x,y,width,height)
        self.browser.NotifyMoveOrResizeStarted()