res := make(DailyAllTierStats, len(t.lastDayStats))
	for tier, st := range t.lastDayStats {
		res[tier] = st.clone()
	}
	return res
}

// UpdateWorkers at the end of this function leaves n goroutines waiting for
// transition tasks
func (t *transitionState) UpdateWorkers(n int) {
	t.mu.Lock()
	defer t.mu.Unlock()
	if t.objAPI == nil { // Init hasn't been called yet.
		return
	}

// Special object test type for stale files situations.
type objTestStaleFilesType func(obj ObjectLayer, instanceType string, dirs []string, t *testing.T)

// ExecObjectLayerStaleFilesTest - executes object layer tests those leaves stale
// files/directories under .minio/tmp.  Creates Erasure ObjectLayer instance and runs test for Erasure layer.
func ExecObjectLayerStaleFilesTest(t *testing.T, objTest objTestStaleFilesType) {

}
```

## 12. Future Enhancements

1. **Directory Leases**: Extend lease support for directories
2. **Lease Key Persistence**: Save lease keys for reconnection
3. **Parent-Child Relationships**: Implement hierarchical leases
4. **Lease Sharing**: Support lease sharing across handles

  - A server-side apply request that makes unrelated changes to an object which has duplicate items in a keyed list no longer fails, and leaves the existing duplicate items as-is.

    return construct(array);
  }

  /**
   * Returns an immutable list containing the given elements, in order. If {@code elements} is a
   * {@link Collection}, this method behaves exactly as {@link #copyOf(Collection)}; otherwise, it
   * behaves exactly as {@code copyOf(elements.iterator()}.
   *
   * @throws NullPointerException if {@code elements} contains a null element
   */

   *
   * @throws UnsupportedOperationException always
   * @deprecated Unsupported operation.
   */
  @Deprecated
  @Override
  @DoNotCall("Always throws UnsupportedOperationException")
  public final void putAll(Map<? extends K, ? extends V> map) {
    throw new UnsupportedOperationException();
  }

  /**
   * Guaranteed to throw an exception and leave the map unmodified.

    }

    /**
     * Get all active leases
     *
     * @return map of lease keys to lease entries
     */
    public Map<Smb2LeaseKey, LeaseEntry> getAllLeases() {
        return new ConcurrentHashMap<>(leases);
    }

    /**
     * Clean up expired leases
     *
     * @param maxAgeMillis maximum age in milliseconds
     * @return number of leases cleaned up
     */

    return interruptible ? "waitFor" : "waitForUninterruptibly";
  }

  private String leave() {
    return "leave";
  }

  public final void testMutualExclusion() throws Exception {
    thread1.callAndAssertReturns(enter());
    thread2.callAndAssertBlocks(enter());
    thread1.callAndAssertReturns(leave());
    thread2.assertPriorCallReturns(enter());
  }

        Smb2LeaseKey key2 = leaseManager.requestLease(path2, Smb2LeaseState.SMB2_LEASE_WRITE_CACHING);

        // Clean up leases older than 5ms
        int cleaned = leaseManager.cleanupExpiredLeases(5);

        // At least the first lease should be cleaned
        assertTrue(cleaned >= 1);

        // Check if old lease was removed
        LeaseEntry entry1 = leaseManager.getLease(key1);
        if (cleaned == 2) {

    try {
      insert(e);
    } finally {
      monitor.leave();
    }
  }

  @CanIgnoreReturnValue
  @Override
  public @Nullable E poll() {
    Monitor monitor = this.monitor;
    if (monitor.enterIf(notEmpty)) {
      try {
        return extract();
      } finally {
        monitor.leave();
      }
    } else {
      return null;
    }
  }