the Go 1.23 behavior.

### Go 1.23

Go 1.23 changed the channels created by package time to be unbuffered
(synchronous), which makes correct use of the [`Timer.Stop`](/pkg/time/#Timer.Stop)
and [`Timer.Reset`](/pkg/time/#Timer.Reset) method results much easier.
The [`asynctimerchan` setting](/pkg/time/#NewTimer) disables this change.
There are no runtime metrics for this change,
This setting will be removed in Go 1.27.

    return new IdentityHashMap<>();
  }

  /**
   * Computes the difference between two maps. This difference is an immutable snapshot of the state
   * of the maps at the time this method is called. It will never change, even if the maps change at
   * a later time.
   *
   * <p>Since this method uses {@code HashMap} instances internally, the keys of the supplied maps

    return new IdentityHashMap<>();
  }

  /**
   * Computes the difference between two maps. This difference is an immutable snapshot of the state
   * of the maps at the time this method is called. It will never change, even if the maps change at
   * a later time.
   *
   * <p>Since this method uses {@code HashMap} instances internally, the keys of the supplied maps

   * @since 15.0
   */
  void awaitRunning();

  /**
   * Waits for the {@link Service} to reach the {@linkplain State#RUNNING running state} for no more
   * than the given time.
   *
   * @param timeout the maximum time to wait
   * @param unit the time unit of the timeout argument
   * @throws TimeoutException if the service has not reached the given state within the deadline

        // Prepare test data with zero values
        byte[] buffer = createValidBuffer("zerofile.txt", "ZEROFI~1.TXT", true);

        // Set zero values - for SMB times, 0 in wire format represents 0 in Java time
        SMBUtil.writeInt4(0, buffer, 0); // nextEntryOffset
        SMBUtil.writeInt4(0, buffer, 4); // fileIndex
        SMBUtil.writeInt8(0, buffer, 8); // creationTime - raw 0 in wire format

      checkArgument(value == null, "recordStats does not take values");
      checkArgument(spec.recordStats == null, "recordStats already set");
      spec.recordStats = true;
    }
  }

  /** Base class for parsing times with durations */
  private abstract static class DurationParser implements ValueParser {
    abstract void parseDuration(CacheBuilderSpec spec, long duration, TimeUnit unit);

    @Override

      checkArgument(value == null, "recordStats does not take values");
      checkArgument(spec.recordStats == null, "recordStats already set");
      spec.recordStats = true;
    }
  }

  /** Base class for parsing times with durations */
  private abstract static class DurationParser implements ValueParser {
    abstract void parseDuration(CacheBuilderSpec spec, long duration, TimeUnit unit);

    @Override

  /**
   * Clears fields that are no longer needed after this future has completed -- or at least all its
   * inputs have completed (more precisely, after {@link #handleAllCompleted()} has been called).
   * Often called multiple times (that is, both when the inputs complete and when the output
   * completes).
   *
   * <p>This is similar to our proposed {@code afterCommit} method but not quite the same. See the
   * description of CL 265462958.
   */

   * should use an explicit {@code break} or be certain that you will eventually remove all the
   * elements.
   *
   * <p>To cycle over the iterable {@code n} times, use the following: {@code
   * Iterables.concat(Collections.nCopies(n, iterable))}
   *
   * <p><b>Java 8+ users:</b> The {@code Stream} equivalent of this method is {@code

//	ChangeTime        |    n/a | unlimited |     int89
//	Devmajor/Devminor | uint21 |    uint21 |    uint57
//	------------------+--------+-----------+----------
//	string encoding   |  ASCII |     UTF-8 |    binary
//	sub-second times  |     no |       yes |        no
//	sparse files      |     no |       yes |       yes
//
// The table's upper portion shows the [Header] fields, where each format reports