docs: def _inline_image(image, mime_type=None):
      """
      Embeds the contents of a file directly inside your stylesheet, eliminating
      the need for another HTTP request. For small files such images or fonts,
      this can be a performance benefit at the cost of a larger generated CSS
      file.
      """
      file = StringValue(image).value
      mime_type = StringValue(mime_type).value or mimetypes.guess_type(file)[0]
      path = None
      if callable(STATIC_ROOT):
          try:
              _file, _storage = list(STATIC_ROOT(file))[0]
              path = _storage.open(_file)
          except:
              pass
      else:
          _path = os.path.join(STATIC_ROOT, file)
          if os.path.exists(_path):
              path = open(_path, 'rb')
      if path:
          url = 'data:' + mime_type + ';base64,' + base64.b64encode(path.read())
      url = url = '%s%s?_=%s' % (STATIC_URL, file, 'NA')
      inline = 'url("%s")' % escape(url)
      return StringValue(inline)