- [ ] Use `Null_Object` instead `Null_Car` - [ ] Add example with S3 and [{paws}](https://paws-r.github.io/docs/s3/) * [del](https://paws-r.github.io/docs/s3/delete_objects.html) * [get](https://paws-r.github.io/docs/s3/get_object.html), also use [head](https://paws-r.github.io/docs/s3/head_object.html) to check whether the file already exists in its newest version * [list](https://paws-r.github.io/docs/s3/list_objects_v2.html) * [add](https://paws-r.github.io/docs/s3/put_object.html) - [ ] Collepse / Tab examples in Rmd file
