docs: def get_view_mode_id(self, view_mode):
          '''Attempts to return a view_mode_id for a given view_mode
          taking into account the current skin. If not view_mode_id can
          be found, None is returned. 'thumbnail' is currently the only
          suppported view_mode.
          '''
          view_mode_ids = VIEW_MODES.get(view_mode.lower())
          if view_mode_ids:
              return view_mode_ids.get(xbmc.getSkinDir())
          return None