optionsPlist:nil];
Blockchain already being adopted by some big-name companies, such as Walmart, AIG, Siemens, Pfizer, and Unilever. For example, IBM's Food Trust uses blockchain to track food's journey before reaching its final destination.，这一点在体育直播中也有详细论述
param: type = default, with the : type part。关于这个话题，safew官方下载提供了深入分析
const chunk = new Uint8Array(chunkSize);
Union[*Ts]: Union will become able to take variadic