---
title: "makePart(for:)"
framework: Assignables
role: symbol
role_heading: Instance Method
platforms: [iOS 18.0+, iPadOS 18.0+, Mac Catalyst 18.0+]
path: "assignables/assignabledocument/makepart(for:)"
---

# makePart(for:)

Creates data for the part with the given identifier.

## Declaration

```swift
func makePart(for partID: AssignableDocument.PartID) throws -> MergeablePartData?
```

## Parameters

- `partID`: The identifier for the part you want to create.

## Return Value

Return Value Part data for the partID provided, if possible. Otherwise, nil.

## Discussion

Discussion In cases where this document is a partial one, i.e. it is missing some parts, you use this method to create data for the missing part. You then use merge(partData:into:) to merge the newly created data into this document.