---
title: BNNSGraph.Builder.PoolingFunction.l2Norm
framework: accelerate
role: symbol
role_heading: Case
path: accelerate/bnnsgraph/builder/poolingfunction/l2norm
---

# BNNSGraph.Builder.PoolingFunction.l2Norm

A function for pooling that computes the square root of the sum of squares of each element in the pooling kernel.

## Declaration

```swift
case l2Norm
```