interface ServerSentEventMessageimport { type ServerSentEventMessage } from "https://deno.land/std@0.207.0/http/mod.ts"; Propertiesoptionalcomment: stringIgnored by the client. optionalevent: stringA string identifying the type of event described. optionaldata: stringThe data field for the message. Split by new lines. optionalid: string | numberThe event ID to set the EventSource object's last event ID value. optionalretry: numberThe reconnection time.