structure CommonUpdate =
struct
  (* unimplemented *)
  fun getSaveSquaresMsg model = (model, [])

  fun getLoadSquaresMsg model = (model, [])

  fun getExportSquaresMsg model = (model, [])

  fun useSquaresInNormalMode (model, squares) = (model, [])

  fun squaresLoadError model = (model, [])
end