# span

`import { span } from "destack:telemetry";`

Run `body` inside one span.

```ds title="span"
export function span<T>(name: &'a readonly string, body: (Span) => T, options?: SpanOptions | undefined): T
```

[language/library/src/telemetry/trace.ds:191:193](https://github.com/destack-sh/destack/blob/main/language/library/src/telemetry/trace.ds#L191-L193)