docs: def get_style_mask(**kwargs):
      """Get the bit mask that, when anded with data, will turn off the
      selected bits
      """
      bits = get_style_bits(**kwargs)
      if 'user' in kwargs and kwargs['user']:
          bits |= user_bit_mask
      else:
          bits &= (0xff ^ user_bit_mask)
      return 0xff ^ bits