fix bogus metadata for extra networks appearing out of cache

    entry = existing_cache.get(title)

    if entry:

        cached_mtime = existing_cache[title].get("mtime", 0)

        cached_mtime = entry.get("mtime", 0)

        if ondisk_mtime > cached_mtime:

            entry = None

    if not entry:

        entry = func()

        if entry is None:

        value = func()

        if value is None:

            return None

        entry['mtime'] = ondisk_mtime

        entry = {'mtime': ondisk_mtime, 'value': value}

        existing_cache[title] = entry

        dump_cache()

    return entry

    return entry['value']

    if metadata is None:

        return JSONResponse({})

    return JSONResponse({"metadata": metadata})

    return JSONResponse({"metadata": json.dumps(metadata, indent=4, ensure_ascii=False)})

def get_single_card(page: str = "", tabname: str = "", name: str = ""):

        errors.display(e, "creating item for extra network")

        item = page.items.get(name)

    page.read_user_metadata(item)

    item_html = page.create_html_for_item(item, tabname)

    return JSONResponse({"html": item_html})

        shared.refresh_checkpoints()

    def create_item(self, name, index=None):

        checkpoint: sd_models.CheckpointInfo = sd_models.checkpoints_list.get(name)

        checkpoint: sd_models.CheckpointInfo = sd_models.checkpoint_aliases.get(name)

        path, ext = os.path.splitext(checkpoint.filename)

        return {

            "name": checkpoint.name_for_extra,

            "onclick": '"' + html.escape(f"""return selectCheckpoint({quote_js(name)})""") + '"',

            "local_preview": f"{path}.{shared.opts.samples_format}",

            "sort_keys": {'default': index, **self.get_sort_keys(checkpoint.filename)},

        }

    def list_items(self):