return (totalLoadCount == 0) ? 0.0 : (double) loadExceptionCount / totalLoadCount;
  }

  /**
   * Returns the total number of nanoseconds the cache has spent loading new values. This can be
   * used to calculate the miss penalty. This value is increased every time {@code loadSuccessCount}
   * or {@code loadExceptionCount} is incremented.
   */
  @SuppressWarnings("GoodTime") // should return a java.time.Duration

    return (totalLoadCount == 0) ? 0.0 : (double) loadExceptionCount / totalLoadCount;
  }

  /**
   * Returns the total number of nanoseconds the cache has spent loading new values. This can be
   * used to calculate the miss penalty. This value is increased every time {@code loadSuccessCount}
   * or {@code loadExceptionCount} is incremented.
   */
  @SuppressWarnings("GoodTime") // should return a java.time.Duration

                </property>
                <file>
                    <missing>simple.xml</missing>
                </file>
            </activation>
            <properties>
                <profile.miss>activated-2</profile.miss>
            </properties>
        </profile>
    </profiles>

    abstract String atomicHelperTypeForTest();
  }

  /**
   * {@link AtomicHelper} based on {@link sun.misc.Unsafe}.
   *
   * <p>Static initialization of this class will fail if the {@link sun.misc.Unsafe} object cannot
   * be accessed.
   */
  @SuppressWarnings("SunApi") // b/345822163
  private static final class UnsafeAtomicHelper extends AtomicHelper {

    /**
     * User property to enable cache statistics display at the end of the build.
     * When set to true, detailed cache statistics including hit/miss ratios,
     * request type breakdowns, and retention policy effectiveness will be displayed
     * when the build completes.
     *
     * @since 4.1.0
     */

          stopwatch = Stopwatch.createStarted();
          startupTimers.put(service, stopwatch);
        }
        if (to.compareTo(RUNNING) >= 0 && stopwatch.isRunning()) {
          // N.B. if we miss the STARTING event then we may never record a startup time.
          stopwatch.stop();
          if (!(service instanceof NoOpService)) {

    or newer.

    ```kotlin
    implementation("com.squareup.okio:okio:1.17.3")
    ```

 *  Fix: Don't miss cancels when sending HTTP/2 request headers.
 *  Fix: Don't miss whole operation timeouts when calls redirect.
 *  Fix: Don't leak connections if web sockets have malformed responses or if `onOpen()` throws.

    // is called within doStart() so we know that the service cannot terminate or fail concurrently
    // with adding this listener so it is impossible to miss an event that we are interested in.
    addListener(
        new Listener() {
          @Override
          public void terminated(State from) {
            executor.shutdown();
          }

			prefix:         "miss/prefix",
			expectedNonRec: false,
			expectedRec:    false,
		},
		// case 2 - only one rule which matches prefix filter
		{

        assertNotNull(result.getEffectiveModel());
        assertEquals("activated-1", result.getEffectiveModel().getProperties().get("profile.file"));
        assertNull(result.getEffectiveModel().getProperties().get("profile.miss"));
    }