---
title: b
framework: combine
role: symbol
role_heading: Instance Property
path: combine/publishers/merge4/b
---

# b

A second publisher to merge.

## Declaration

```swift
let b: B
```

## See Also

### Inspecting publisher properties

- [a](combine/publishers/merge4/a.md)
- [c](combine/publishers/merge4/c.md)
- [d](combine/publishers/merge4/d.md)