* </ul>
 *
 * <p>Invalid:
 *
 * <ul>
 *   <li>Expired: time expired (key/value may still be set)
 *   <li>Collected: key/value was partially collected, but not yet cleaned up
 *   <li>Unset: marked as unset, awaiting cleanup or reuse
 * </ul>
 */
@GwtIncompatible
interface ReferenceEntry<K, V> {
  /** Returns the value reference from this entry. */
  @Nullable ValueReference<K, V> getValueReference();

## Deprecate a *path operation* { #deprecate-a-path-operation }

If you need to mark a *path operation* as <abbr title="obsolete, recommended not to use it">deprecated</abbr>, but without removing it, pass the parameter `deprecated`:

{* ../../docs_src/path_operation_configuration/tutorial006.py hl[16] *}

It will be clearly marked as deprecated in the interactive docs:

<img src="/img/tutorial/path-operation-configuration/image04.png">

-   [guava-discuss: For open-ended questions and discussion](https://groups.google.com/group/guava-discuss)

## IMPORTANT WARNINGS

1. APIs marked with the `@Beta` annotation at the class or method level
are subject to change. They can be modified in any way, or even
removed, at any time. If your code is a library itself (i.e. it is

        assertThrows(SmbUnsupportedOperationException.class, sut::watch);
        verify(tree, times(1)).close();
    }

    // SMB1 path: on error code 0x10B the handle should be marked closed
    @Test
    @DisplayName("watch() SMB1 marks handle closed on error 0x10B")
    void watch_smb1_marksClosed_onError10B() throws Exception {
        NotifyResponse resp = mock(NotifyResponse.class);

  ) {}

  /**
   * Invoked when a call no longer uses a connection.
   */
  open fun connectionReleased(
    connection: Connection,
    call: Call,
  ) {}

  /**
   * Invoked when a connection is marked for no new exchanges.
   */
  open fun noNewExchanges(connection: Connection) {}

  companion object {
    val NONE: ConnectionListener = object : ConnectionListener() {}
  }

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            // This is acceptable - not all JVM implementations support destroying SecretKey
            // The important part is that the storage is marked as destroyed
        }

        assertTrue(storage.isDestroyed(), "Storage should be marked as destroyed");

        // Operations should fail after destroy
        assertThrows(IllegalStateException.class, () -> {

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    /**
     * Tests to see if the file this SmbResource represents is marked as
     * hidden. This method will also return true for shares with names that
     * end with '$' such as <code>IPC$</code> or <code>C$</code>.
     *
     * @return <code>true</code> if the <code>SmbResource</code> is marked as being hidden
     * @throws CIFSException if an error occurs accessing the resource
     */

        byte[] dst = new byte[256];
        int bytesWritten = packet.writeTrailerWireFormat(dst, 0);

        assertTrue(bytesWritten > 68); // Should be larger due to scope
    }

    @Test
    @DisplayName("readTrailerWireFormat should read complete packet data")
    void testReadTrailerWireFormatSuccess() throws IOException {
        SessionRequestPacket writePacket =