code: def create_unet_forward(original_forward):
      def UNetModel_forward(
          self, x, timesteps=None, context=None, *args, **kwargs
      ):
          if current_unet is not None:
              return current_unet.forward(
                  x, timesteps, context, *args, **kwargs
              )
  
          return original_forward(
              self, x, timesteps, context, *args, **kwargs
          )
  
      return UNetModel_forward
  
file_path: stable-diffusion-webui/modules/sd_unet.py
imports: import torch.nn
  from modules import script_callbacks, shared, devices
label_desc: Use image node_id 4 for calling a global function with example usage: create_unet_forward(original_forward) and returns: UNetModel_forward, original_forward, current_unet