message: Remove undefined checks before pause/resume
diff: @@ -669,20 +669,15 @@ export class Container extends EventEmitterWithErrorHandling<IContainerEvents> i
  // Stop inbound message processing while we complete the snapshot
  try {
  - if (this.deltaManager !== undefined) {
  await this.deltaManager.inbound.systemPause();
  - }
  -
  await this.snapshotCore(tagMessage, fullTree);
  } catch (ex) {
  this.logger.logException({ eventName: "SnapshotExceptionError" }, ex);
  throw ex;
  } finally {
  - if (this.deltaManager !== undefined) {
  this.deltaManager.inbound.systemResume();
  }
  }
  - }
  public setAutoReconnect(reconnect: boolean) {
  if (reconnect && this.closed) {
  