类：ServerHttp2Stream
【Class: ServerHttp2Stream】
ServerHttp2Stream 类是 Http2Stream 的扩展，专门用于 HTTP/2 服务器。服务器上的 Http2Stream 实例提供了额外的方法，例如 http2stream.pushStream() 和 http2stream.respond()，这些方法仅在服务器端相关。
【The ServerHttp2Stream class is an extension of Http2Stream that is
used exclusively on HTTP/2 Servers. Http2Stream instances on the server
provide additional methods such as http2stream.pushStream() and
http2stream.respond() that are only relevant on the server.】