UpstreamMessageType type
Typen für Upstreamnachrichten
type UpstreamMessageType =
| "joinGroup"
| "leaveGroup"
| "sendToGroup"
| "sendEvent"
| "sequenceAck"
| "ping"
| "invoke"
| "cancelInvocation"
| "streamData"
| "streamEnd"
| "setGroupState"
| "subscribeGroupState"
| "unsubscribeGroupState"