# FlatMapIterator

`import { FlatMapIterator } from "destack:iter";`

Iterator that maps each value to an iterable and yields its values.

```ds title="FlatMapIterator"
export struct FlatMapIterator<I, T, V, J>
```

[language/library/src/iter/iterator.ds:142:154](https://github.com/destack-sh/destack/blob/main/language/library/src/iter/iterator.ds#L142-L154)