E e = (E) element;
      AvlNode<E> root = rootReference.get();
      if (!range.contains(e) || root == null) {
        return 0;
      }
      return root.count(comparator(), e);
    } catch (ClassCastException | NullPointerException e) {
      return 0;
    }
  }

  @CanIgnoreReturnValue
  @Override
  public int add(@ParametricNullness E element, int occurrences) {

    }

    public void test_parseProjectProperties() {
        try {
            new SystemHelper().parseProjectProperties(null);
            assertTrue(false);
        } catch (final FessSystemException e) {
            // ok
        }
    }

    public void test_refreshDesignJspFiles() {
        final VirtualHostHelper virtualHostHelper = new VirtualHostHelper();

    assertFalse("Expected no more permutations, but there was one.", permutations.hasNext());
    try {
      permutations.next();
      fail("Expected NoSuchElementException.");
    } catch (NoSuchElementException expected) {
    }
  }

  private <T> void assertPermutationsCount(int expected, Collection<List<T>> permutationSet) {
    assertEquals(expected, permutationSet.size());

    end
    dep ->> operation: Run dependency, e.g. DB session
    opt raise
        operation -->> dep: Raise Exception (e.g. HTTPException)
        opt handle
            dep -->> dep: Can catch exception, raise a new HTTPException, raise other exception
        end
        handler -->> client: HTTP error response
    end

    operation ->> client: Return response to client

- Install: `./gradlew install -Pgradle_installPath=/any/path`
- Use: `/any/path/bin/gradle taskName`.

It's also a good idea to run `./gradlew sanityCheck` before submitting your change because this will help catch code style issues.

> **NOTE:** Do **NOT** run `gradle build` on the local development environment,
> even if you have Gradle or Develocity build caching enabled for the project.

      Closer closer = Closer.create();
      try {
        FileInputStream in = closer.register(openStream());
        return ByteStreams.toByteArray(in, in.getChannel().size());
      } catch (Throwable e) {
        throw closer.rethrow(e);
      } finally {
        closer.close();
      }
    }

    @Override
    public String toString() {
      return "Files.asByteSource(" + file + ")";

   */
  private static int runSuppressionFailureTest(ByteSource in, ByteSink out) {
    try {
      in.copyTo(out);
      fail();
    } catch (IOException expected) {
      return expected.getSuppressed().length;
    }
    throw new AssertionError(); // can't happen
  }

  private static ByteSource newNormalByteSource() {

    protected Path getPath() {
      return fileThreadLocal.get();
    }

    public final void tearDown() throws IOException {
      try {
        java.nio.file.Files.delete(fileThreadLocal.get());
      } catch (IOException e) {
        logger.log(Level.WARNING, "Unable to delete file: " + fileThreadLocal.get(), e);
      }
      fileThreadLocal.remove();
    }
  }

  @AndroidIncompatible

        // TODO
        try {
            Class.forName("org.apache.commons.logging.LogFactory");
            return new JclLoggerAdapterFactory();
        } catch (final Throwable ignore) {
            return new JulLoggerAdapterFactory();
        }
    }

    /**
     * インスタンスを構築します。
     *
     * @param clazz
     *            ログ出力のカテゴリとなるクラス
     */

      return array[start + index];
    }

    @Override
    @SuppressWarnings("Java7ApiChecker")
    /*
     * This is an override that is not directly visible to callers, so NewApi will catch calls to
     * Collection.spliterator() where necessary.
     */
    @IgnoreJRERequirement
    public Spliterator.OfDouble spliterator() {
      return Spliterators.spliterator(array, start, end, 0);
    }