Type Alias SendResult<TEnvelope>

SendResult:
    | {
        envelope: TEnvelope;
        kind: "applicationMessage";
        newState: ClientState;
    }
    | { envelope: TEnvelope; kind: "proposal"; pending: PendingState }
    | {
        envelope: TEnvelope;
        kind: "groupEvolution";
        pending: PendingState;
        welcome: MlsWelcomeMessage | undefined;
    }
    | { envelope: TEnvelope; kind: "selfUpdate"; pending: PendingState }