code: def _build_lv_grid_dict(network):
      
  
      lv_grid_dict = {}
      for lv_grid in network.mv_grid.lv_grids:
          lv_grid_dict[lv_grid.id] = lv_grid
      return lv_grid_dict
docs: Creates dict of LV grids
  
      LV grid ids are used as keys, LV grid references as values.
  
      Parameters
      ----------
      network: :class:`~.grid.network.Network`
          The eDisGo container object
  
      Returns
      -------
      :obj:`dict`
          Format: {:obj:`int`: :class:`~.grid.grids.LVGrid`}