---
title: conversionTypes
framework: adattributionkit
role: symbol
role_heading: Instance Property
path: adattributionkit/postbackupdate/conversiontypes
---

# conversionTypes

An array conversion type the system uses to determine which postbacks to update with this postback update.

## Declaration

```swift
let conversionTypes: [PostbackUpdate.ConversionType]?
```

## Discussion

Discussion If nil, the system updates all types of postbacks by default.