}

    @Test
    @DisplayName("acquire after release reacquires underlying tree connection")
    void acquireAfterReleaseReacquires() {
        // After dropping to zero, acquire() should reacquire the underlying connection
        // Drop usage to zero
        handle.release();
        verify(treeConnection, times(1)).release();

            // If we do cache these we never get to the properly cached
            // standalone referral we might have.
            log.warn("Dropping self-referential referral " + dr);
            dr = null;
        }
        return dr;
    }

    /**
     * @param tf
     * @param domain
     * @param root
     * @param path

   *
   *   o REMOVE lines track entries that have been deleted.
   *
   * The journal file is appended to as cache operations occur. The journal may occasionally be
   * compacted by dropping redundant lines. A temporary file named "journal.tmp" will be used during
   * compaction; that file should be deleted if it exists when the cache is opened.
   */

  private val journalFile: Path

- Improved memory usage of `kube-scheduler` by dropping the `.metadata.managedFields` field that `kube-scheduler` doesn't require. ([#119556](https://github.com/kubernetes/kubernetes/pull/119556), [@linxiulei](https://github.com/linxiulei))

- `kubectl apply` now coerces `null` values for labels and annotations in manifests to empty string values, 
consistent with typed JSON metadata decoding, rather than dropping all labels and annotations ([#129257](https://github.com/kubernetes/kubernetes/pull/129257), [@liggitt](https://github.com/liggitt)) [SIG API Machinery]

### Feature

   * close or flush the reader.
   *
   * <p>This is identical to {@link #copy(Readable, Appendable)} but optimized for these specific
   * types. CharBuffer has poor performance when being written into or read out of so round tripping
   * all the bytes through the buffer takes a long time. With these specialized types we can just
   * use a char array.
   *
   * @param from the object to read from
   * @param to the object to write to

- Improved memory usage of kube-apiserver by dropping`.metadata.managedFields` field that self-requested informers of kube-apiserver didn't need. ([#124667](https://github.com/kubernetes/kubernetes/pull/124667), [@linxiulei](https://github.com/linxiulei)) [SIG API Machinery]

    return new ListenerCallQueue.Event<Listener>() {
      @Override
      public void call(Listener listener) {
        listener.stopping(from);
      }

      @Override
      public String toString() {
        return "stopping({from = " + from + "})";
      }
    };
  }

  private final Monitor monitor = new Monitor();

- Fixed a race condition in `kube-proxy` when using LocalModeNodeCIDR, to avoid dropping Services traffic if the object node is recreated when `kube-proxy` is starting. ([#118499](https://github.com/kubernetes/kubernetes/pull/118499), [@aojea](https://github.com/aojea))

     * Called when the service transitions to the {@linkplain State#STOPPING STOPPING} state. The
     * only valid values for {@code from} are {@linkplain State#STARTING STARTING} or {@linkplain
     * State#RUNNING RUNNING}. This occurs when {@link Service#stopAsync} is called.
     *
     * @param from The previous state that is being transitioned from.
     */
    public void stopping(State from) {}

    /**