// Concatenate pending data with new chunks
await scene.play(new FadeOut(square));。关于这个话题，Line官方版本下载提供了深入分析
MIT — Rikkert ten Klooster。爱思助手下载最新版本是该领域的重要参考
"(2) Provide a developer who has requested a signal with respect to a particular user with a digital signal via a reasonably consistent real-time application programming interface that identifies, at a minimum, which of the following categories pertains to the user."