---
title: "subscript(_:)"
framework: appintentstesting
role: symbol
role_heading: Instance Subscript
path: "appintentstesting/intentdefinitions/definitioncollection/subscript(_:)"
---

# subscript(_:)

Retrieves a type definition using its identifier.

## Declaration

```swift
subscript(typeIdentifier: String) -> Definition { get }
```