---
title: "withUnsafeMutableMIDIPacketListPointer(_:)"
framework: coremidi
role: symbol
role_heading: Instance Method
path: "coremidi/midipacketlist/builder/withunsafemutablemidipacketlistpointer(_:)"
---

# withUnsafeMutableMIDIPacketListPointer(_:)

## Declaration

```swift
func withUnsafeMutableMIDIPacketListPointer<Result>(_ body: (inout UnsafeMutableMIDIPacketListPointer) -> Result) -> Result
```