# observationClose

`import { observationClose } from "destack:runtime";`

Close one runtime observation subscription.

```ds title="observationClose"
export declare function observationClose(handle: ObservationHandle): Result<void, HostError>
```

[language/library/src/runtime/observation.ds:84](https://github.com/destack-sh/destack/blob/main/language/library/src/runtime/observation.ds#L84)