}

  @Override
  public boolean containsKey(@Nullable Object key) {
    if (unfiltered.containsKey(key)) {
      @SuppressWarnings("unchecked") // k is equal to a K, if not one itself
      K k = (K) key;
      return keyPredicate.apply(k);
    }
    return false;
  }

  @Override
  public Collection<V> removeAll(@Nullable Object key) {

  }

  @Override
  public boolean containsKey(@Nullable Object key) {
    if (unfiltered.containsKey(key)) {
      @SuppressWarnings("unchecked") // k is equal to a K, if not one itself
      K k = (K) key;
      return keyPredicate.apply(k);
    }
    return false;
  }

  @Override
  public Collection<V> removeAll(@Nullable Object key) {

      return value;
    }
  }

  final @Nullable V getWithoutCaching(Object key) {
    checkNotNull(key);
    return backingMap.get(key);
  }

  final boolean containsKey(@Nullable Object key) {
    return getIfCached(key) != null || backingMap.containsKey(key);
  }

  final Set<K> unmodifiableKeySet() {
    return new AbstractSet<K>() {
      @Override
      public UnmodifiableIterator<K> iterator() {

      assertFalse(
          "Inverse should not contain entry " + reversed, inv.entrySet().contains(reversed));
      assertFalse(
          "Inverse should not contain key " + reversed.getKey(),
          inv.containsKey(reversed.getKey()));
      assertFalse(
          "Inverse should not contain value " + reversed.getValue(),
          inv.containsValue(reversed.getValue()));
      /*

        final Map<String, String[]> params = request.getParameterMap();
        if (logger.isDebugEnabled()) {
            logger.debug("params: {}", params);
        }
        return params.containsKey(ERROR) || params.containsKey(ID_TOKEN) || params.containsKey(CODE);
    }

    /**
     * Updates the user's group and role membership information.
     * @param user The Azure AD user to update.
     */

        assertTrue(result.containsKey(ConfigName.CONFIG));
        assertTrue(result.containsKey(ConfigName.CLIENT));
        assertTrue(result.containsKey(ConfigName.XPATH));
        assertTrue(result.containsKey(ConfigName.META));
        assertTrue(result.containsKey(ConfigName.VALUE));
        assertTrue(result.containsKey(ConfigName.SCRIPT));
        assertTrue(result.containsKey(ConfigName.FIELD));

  }

  @CollectionSize.Require(absent = ZERO)
  public void testHeadMapInclusive() {
    assertTrue(navigableMap.headMap(a.getKey(), true).containsKey(a.getKey()));
  }

  @CollectionSize.Require(absent = ZERO)
  public void testTailMapExclusive() {
    assertFalse(navigableMap.tailMap(a.getKey(), false).containsKey(a.getKey()));
  }

  }

  @CollectionSize.Require(absent = ZERO)
  public void testHeadMapInclusive() {
    assertTrue(navigableMap.headMap(a.getKey(), true).containsKey(a.getKey()));
  }

  @CollectionSize.Require(absent = ZERO)
  public void testTailMapExclusive() {
    assertFalse(navigableMap.tailMap(a.getKey(), false).containsKey(a.getKey()));
  }

    }

    @Override
    public void clear() {
      assertTrue(Thread.holdsLock(mutex));
      super.clear();
    }

    @Override
    public boolean containsKey(Object key) {
      assertTrue(Thread.holdsLock(mutex));
      return super.containsKey(key);
    }

    @Override
    public boolean containsValue(Object value) {
      assertTrue(Thread.holdsLock(mutex));
      return super.containsValue(value);
    }

    }

    @Override
    public boolean isEmpty() {
        return parent.isEmpty();
    }

    @Override
    public boolean containsKey(final Object key) {
        if (parent.containsKey(key)) {
            return true;
        }
        return parent.containsKey(toCamelCase(key));
    }

    @Override
    public boolean containsValue(final Object value) {
        return parent.containsValue(value);
    }