code: def get_metadata(page: str = "", item: str = ""):
      from starlette.responses import JSONResponse
  
      page = next(
          iter([x for x in extra_pages if x.name == page]), None
      )
      if page is None:
          return JSONResponse({})
  
      metadata = page.metadata.get(item)
      if metadata is None:
          return JSONResponse({})
  
      return JSONResponse(
          {
              "metadata": json.dumps(
                  metadata, indent=4, ensure_ascii=False
              )
          }
      )
  
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 5 for calling a global function with example usage: get_metadata(page, item) and returns: JSONResponse, JSONResponse, JSONResponse