---
title: "index(of:)"
framework: realitykit
role: symbol
role_heading: Instance Method
path: "realitykit/blendshapeweightsset/index(of:)"
---

# index(of:)

Returns the index where the specified blend shape weights data appears in the collection.

## Declaration

```swift
func index(of blendShapeName: String) -> BlendShapeWeightsSet.Index?
```