code: def allowed_preview_extensions():
      return allowed_preview_extensions_with_extra(
          (shared.opts.samples_format,)
      )
  
imports: import functools
  import os.path
  import urllib.parse
  from pathlib import Path
  from modules import shared, ui_extra_networks_user_metadata, errors, extra_networks
  from modules.images import read_info_from_image, save_image_with_geninfo
  import gradio
  import json
  import html
  from fastapi.exceptions import HTTPException
  from modules.generation_parameters_copypaste import image_from_url_text
  from modules.ui_components import ToolButton
label_desc: Use image node_id 2 for calling a global function with example usage: allowed_preview_extensions() and returns: allowed_preview_extensions_with_extra