code: def modelmerger(*args):
      try:
          results = extras.run_modelmerger(*args)
      except Exception as e:
          errors.report(
              "Error loading/saving model file", exc_info=True
          )
          sd_models.list_models()  # to remove the potentially missing models from the list
          return [
              *[
                  gr.Dropdown.update(
                      choices=sd_models.checkpoint_tiles()
                  )
                  for _ in range(4)
              ],
              f"Error merging checkpoints: {e}",
          ]
      return results
  
file_path: stable-diffusion-webui/modules/ui_checkpoint_merger.py
imports: import gradio
  from modules import sd_models, sd_vae, errors, extras, call_queue
  from modules.ui_components import FormRow
  from modules.ui_common import create_refresh_button
label_desc: Use image node_id 2 for calling a global function with example usage: modelmerger() and returns: results, list