code: def update_interp_description(value):
      interp_description_css = "<p style='margin-bottom: 2.5em'>{}</p>"
      interp_descriptions = {
          "No interpolation": interp_description_css.format(
              "No interpolation will be used. Requires one model; A. Allows for format conversion and VAE baking."
          ),
          "Weighted sum": interp_description_css.format(
              "A weighted sum will be used for interpolation. Requires two models; A and B. The result is calculated as A * (1 - M) + B * M"
          ),
          "Add difference": interp_description_css.format(
              "The difference between the last two models will be added to the first. Requires three models; A, B and C. The result is calculated as A + (B - C) * M"
          ),
      }
      return interp_descriptions[value]
  
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 1 for calling a global function with example usage: update_interp_description(value) and returns: interp_descriptions