OnChildAttachmentModified

The [OnChildAttached()](API\Runtime\GeometryFramework\Components\UDynamicMeshComponent\OnChildAttached) and [OnChildDetached()](API\Runtime\GeometryFramework\Components\UDynamicMeshComponent\OnChildDetached) implementations (from [USceneComponent](API\Runtime\Engine\Components\USceneComponent) API) broadcast this delegate.