docs: def group_num(self):
          """Current group number.
  
          :getter: Returns current group number
          :setter: Sets current group number
          :type: int
          """
          xkb_state = XkbStateRec()
          XkbGetState(self._display, XkbUseCoreKbd, byref(xkb_state))
          return xkb_state.group