---
title: SecTransformCreateGroupTransform()
framework: security
role: symbol
role_heading: Function
path: security/sectransformcreategrouptransform()
---

# SecTransformCreateGroupTransform()

Creates an object that acts as a container for a set of connected transforms.

## Declaration

```swift
func SecTransformCreateGroupTransform() -> SecGroupTransform
```

## Return Value

Return Value A transform group object.

## Discussion

Discussion A SecGroupTransform is a container for all of the transforms that are in a directed graph. You can use this container as you would a single transform with the SecTransformExecute(_:_:), SecTransformExecuteAsync(_:_:_:) and SecTransformCopyExternalRepresentation(_:) functions.On the other hand, unlike a stand alone transform, you can’t use a transform group with the SecTransformConnectTransforms(_:_:_:_:_:_:), SecTransformSetAttribute(_:_:_:_:) or SecTransformGetAttribute(_:_:) functions. Attempting to do so produces undefined behavior.