interface WSInitimport { type WSInit } from "https://deno.land/x/cav@0.2.3/ws.ts"; Initializer options for the webSocket() function. Type ParametersoptionalRecv = anyPropertiesoptionalrecv: Parser<any, Recv> | nullFor parsing received messages before calling any registered message listeners. If this is omitted, messages will be passed through to listeners without parsing, typed as any. If this parser returns undefined, no message event will be triggered.