code: function parse_XLNullableWideString(data) {
  	var cchCharacters = data.read_shift(4);
  	return cchCharacters === 0 || cchCharacters === 0xFFFFFFFF ? "" : data.read_shift(cchCharacters, 'dbcs');
  }
docs: /* [MS-XLSB] 2.5.166