method Http2Server.once
Usage in Deno
```typescript import { type Http2Server } from "node:node__http2.d.ts"; ```
Http2Server.once(event: "checkContinue",listener: (request: InstanceType<Http2Request>,response: InstanceType<Http2Response>,) => void,): this
Http2Server.once(event: "request",listener: (request: InstanceType<Http2Request>,response: InstanceType<Http2Response>,) => void,): this
Http2Server.once(event: "session",listener: (session: ServerHttp2Session<Http1Request, Http1Response, Http2Request, Http2Response>) => void,): this
listener: (session: ServerHttp2Session<Http1Request, Http1Response, Http2Request, Http2Response>) => void
this