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# `keys()`

The keys method returns all of the collection's keys:

```js
const collection = collect([
  {
    club: 'Liverpool',
    nickname: 'The Reds',
  },
]);

keys = collection.keys();

// ['club', 'nickname']
```

[View source on GitHub](https://github.com/ecrmnn/collect.js/blob/master/src/methods/keys.js)