---
title: "merge(partData:into:)"
framework: Assignables
role: symbol
role_heading: Instance Method
platforms: [iOS 17.5+, iPadOS 17.5+, Mac Catalyst 17.5+]
path: "assignables/mergeablepartscontainer/merge(partdata:into:)"
---

# merge(partData:into:)

Merges an individual part into the specified part of this object.

## Declaration

```swift
mutating func merge(partData: MergeablePartData, into partID: Self.PartID) async throws -> Bool
```

## Parameters

- `partData`: The part data to merge into this object.
- `partID`: The part ID of the part that the incoming data should be merged in.

## Return Value

Return Value true, if the merge caused a mutation.