}
  }

  private class CycleDetectingReentrantReadLock extends ReentrantReadWriteLock.ReadLock {

    @Weak final CycleDetectingReentrantReadWriteLock readWriteLock;

    CycleDetectingReentrantReadLock(CycleDetectingReentrantReadWriteLock readWriteLock) {
      super(readWriteLock);
      this.readWriteLock = readWriteLock;
    }

    @Override
    public void lock() {

    }
  }

  private class CycleDetectingReentrantReadLock extends ReentrantReadWriteLock.ReadLock {

    @Weak final CycleDetectingReentrantReadWriteLock readWriteLock;

    CycleDetectingReentrantReadLock(CycleDetectingReentrantReadWriteLock readWriteLock) {
      super(readWriteLock);
      this.readWriteLock = readWriteLock;
    }

    @Override
    public void lock() {

  }

  public void testReentrantReadWriteLock_implDoesNotExposeShadowedLocks() {
    assertEquals(
        "Unexpected number of public methods in ReentrantReadWriteLock. "
            + "The correctness of CycleDetectingReentrantReadWriteLock depends on "
            + "the fact that the shadowed ReadLock and WriteLock are never used or "
            + "exposed by the superclass implementation. If the implementation has "

  }

  public void testReentrantReadWriteLock_implDoesNotExposeShadowedLocks() {
    assertEquals(
        "Unexpected number of public methods in ReentrantReadWriteLock. "
            + "The correctness of CycleDetectingReentrantReadWriteLock depends on "
            + "the fact that the shadowed ReadLock and WriteLock are never used or "
            + "exposed by the superclass implementation. If the implementation has "