---
title: createSubject
framework: combine
role: symbol
role_heading: Instance Property
path: combine/publishers/multicast/createsubject
---

# createSubject

A closure that returns a subject each time a subscriber attaches to the multicast publisher.

## Declaration

```swift
final let createSubject: () -> SubjectType
```

## See Also

### Inspecting publisher properties

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