code: def set_is_pallets_theme(app):
      
      if app.config.is_pallets_theme is not None:
          return
  
      theme = getattr(app.builder, "theme", None)
  
      while theme is not None:
          if theme.name == "pocoo":
              app.config.is_pallets_theme = True
              break
  
          theme = theme.base
      else:
          app.config.is_pallets_theme = False
docs: Set the ``is_pallets_theme`` config to ``True`` if the current
      theme is a decedent of the ``pocoo`` theme.