---
title: NotificationCenter.Publisher.Failure
framework: foundation
role: symbol
role_heading: Type Alias
path: foundation/notificationcenter/publisher/failure
---

# NotificationCenter.Publisher.Failure

The kind of errors this publisher might publish.

## Declaration

```swift
typealias Failure = Never
```

## See Also

### Declaring Publisher Topography

- [NotificationCenter.Publisher.Output](foundation/notificationcenter/publisher/output.md)