dominictarr/level-sublevel — pull request #6 by juliangruber (2013-04-09 07:29:50+00:00)
Title: prevent sublevel being installed multiple times

This way, every plugin that needs `level-sublevel` internally can just do

```js
module.exports = function (db) {
db = SubLevel(db)
// ...
}
```

And that is safe! So you no longer have to teach people about sublevel in order to use some of your modules.