---
title: append
framework: metalperformanceshadersgraph
role: symbol
role_heading: Instance Property
path: metalperformanceshadersgraph/mpsgraphexecutableserializationdescriptor/append
---

# append

Flag to append to an existing .mpsgraphpackage if found at provided url.

## Declaration

```swift
var append: Bool { get set }
```

## Discussion

Discussion If false, the exisiting .mpsgraphpackage will be overwritten.