**Is your feature request related to a problem? Please describe.** There is currently a Diffusers [example for using "Reference Only" with ControlNet.](https://github.com/huggingface/diffusers/blob/main/examples/community/stable_diffusion_controlnet_reference.py) But there is not yet one for XL. **Describe the solution you'd like** It would be great to have an example for SD XL. Please and thanks!