protected String pendingToString() {
    ListenableFuture<? extends V> localInputFuture = delegateRef;
    ScheduledFuture<?> localTimer = timer;
    if (localInputFuture != null) {
      String message = "inputFuture=[" + localInputFuture + "]";
      if (localTimer != null) {
        long delay = localTimer.getDelay(TimeUnit.MILLISECONDS);
        // Negative delays look confusing in an error message
        if (delay > 0) {