---
title: header
framework: swift
role: symbol
role_heading: Instance Property
path: swift/managedbuffer/header
---

# header

The stored Header instance.

## Declaration

```swift
final var header: Header
```

## Discussion

Discussion During instance creation, in particular during ManagedBuffer.create’s call to initialize, ManagedBuffer’s header property is as-yet uninitialized, and therefore reading the header property during ManagedBuffer.create is undefined.