---
title: isIncluded
framework: combine
role: symbol
role_heading: Instance Property
path: combine/publishers/tryfilter/isincluded
---

# isIncluded

An error-throwing closure that indicates whether this filter should republish an element.

## Declaration

```swift
let isIncluded: (Upstream.Output) throws -> Bool
```

## See Also

### Inspecting publisher properties

- [upstream](combine/publishers/tryfilter/upstream.md)