code: def create_theme_dropdown():
      import gradio as gr
  
      asset_path = pathlib.Path() / "themes"
      themes = []
      for theme_asset in os.listdir(str(asset_path)):
          themes.append(
              (
                  ThemeAsset(theme_asset),
                  gr.Theme.load(str(asset_path / theme_asset)),
              )
          )
  
      def make_else_if(theme_asset):
          return f"""
          else if (theme == '{str(theme_asset[0].version)}') {{
              var theme_css = `{theme_asset[1]._get_theme_css()}`
          }}"""
  
      head, tail = themes[0], themes[1:]
      if_statement = f"""
          if (theme == "{str(head[0].version)}") {{
              var theme_css = `{head[1]._get_theme_css()}`
          }} {" ".join(make_else_if(t) for t in tail)}
      """
  
      latest_to_oldest = sorted(
          [t[0] for t in themes], key=lambda asset: asset.version
      )[::-1]
      latest_to_oldest = [str(t.version) for t in latest_to_oldest]
  
      component = gr.Dropdown(
          choices=latest_to_oldest,
          value=latest_to_oldest[0],
          render=False,
          label="Select Version",
          container=False,
      )
  
      return (
          component,
          f"""
          (theme) => {{
              if (!document.querySelector('.theme-css')) {{
                  var theme_elem = document.createElement('style');
                  theme_elem.classList.add('theme-css');
                  document.head.appendChild(theme_elem);
              }} else {{
                  var theme_elem = document.querySelector('.theme-css');
              }}
              {if_statement}
              theme_elem.innerHTML = theme_css;
          }}
      """,
      )
  
label_desc: Use image node_id 1 for calling a global function with example usage: create_theme_dropdown() and returns: component,  str, if_statement, str, str, str, str, theme_asset, str