code: def link_preview(self, filename):
      quoted_filename = urllib.parse.quote(filename.replace("\\", "/"))
      mtime = os.path.getmtime(filename)
      return f"./sd_extra_networks/thumb?filename={quoted_filename}&mtime={mtime}"
  
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 4 for calling the ExtraNetworksPage obj's underlying member method code with example usage: obj.link_preview(filename) and returns: str, quoted_filename, str, mtime