method FullPacketCodec.prototype.readPacketimport { FullPacketCodec } from "https://deno.land/x/grm@0.8.0/mod.ts"; readPacket(reader: PromisedNetSockets | PromisedWebSockets): Promise<Buffer>Parametersreader: PromisedNetSockets | PromisedWebSocketsReturnsPromise<Buffer>