SpUtil.getObjList报错：Expected a value of type 'Never', but got one of type 'Message'

[ParadiseWitch]

使用SpUtil.getObjList报错，Message.fromJson是使用json_annotation自动生成的

SpUtil.getObjList(getSPKey(), (v) {
  return Message.fromJson(v as Map<String, dynamic>);
})

运行时报错：

The following TypeErrorImpl was thrown while handling a gesture:
Expected a value of type 'Never', but got one of type 'Message'