---
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/assignabledocument/merge(partdata:into:)"
---

# merge(partData:into:)

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

## Declaration

```swift
@discardableResult mutating func merge(partData: MergeablePartData, into partID: AssignableDocument.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.

## See Also

### Merging the parts

- [merge(_:)](assignables/assignabledocument/merge(_:).md)
- [merge(other:)](assignables/assignabledocument/merge(other:).md)
- [merge(partID:partDataURL:)](assignables/assignabledocument/merge(partid:partdataurl:).md)