---
title: "callAsFunction(updateDescription:)"
framework: declaredagerange
role: symbol
role_heading: Instance Method
path: "declaredagerange/significantupdateaction/callasfunction(updatedescription:)"
---

# callAsFunction(updateDescription:)

Shows the significant update acknowledgment interface.

## Declaration

```swift
func callAsFunction(updateDescription: String) async throws
```

## Parameters

- `updateDescription`: A clear description of what changed in your app and why acknowledgment is required.

## Discussion

Discussion Call this method when you need to inform people about significant changes to your app that require their acknowledgment and consent before proceeding. For a code example, refer to showSignificantUpdateAcknowledgment. note: An error if the request fails.