@NotNull
  private LazyRefreshingSelfQueue<String> getQueue(final VcsRoot vcsRoot) {
    synchronized (myLock) {
      LazyRefreshingSelfQueue<String> queue = myRefreshingQueues.get(vcsRoot);
      if (queue != null) return queue;

      queue = new LazyRefreshingSelfQueue<>(
        () -> {
          int interval = VcsConfiguration.getInstance(myProject).CHANGED_ON_SERVER_INTERVAL;
          return interval > 0 ? interval * 60000L : ourRottenPeriod;
        },
        new MyShouldUpdateChecker(vcsRoot),
        new MyUpdater(vcsRoot)
      );
      myRefreshingQueues.put(vcsRoot, queue);
      return queue;
    }
  }
@NotNull
  private LazyRefreshingSelfQueue<String> getQueue(final VcsRoot vcsRoot)