# Extend

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

Collection extended from an iterable sequence.

```ds title="Extend"
export newtype interface Extend<T, const A: Access = "exclusive"> {
    extend(values: Iterable<T, void>): void;
}
```

[language/library/src/iter/iterator.ds:66:69](https://github.com/destack-sh/destack/blob/main/language/library/src/iter/iterator.ds#L66-L69)

## Members

### `extend(values: Iterable<T, void>): void`

Append `values`.