List<User> loadCalls = new ArrayList<>();

        // Control behavior
        boolean updateThrowsException = false;
        boolean deleteThrowsException = false;
        boolean changePasswordThrowsException = false;
        boolean loadThrowsException = false;
        boolean changePasswordResult = false;
        User loadResult = null;

        @Override

  private boolean inputStreamOpened;
  private boolean inputStreamClosed;

  TestByteSource(byte[] bytes, TestOption... options) {
    this.bytes = checkNotNull(bytes);
    this.options = ImmutableSet.copyOf(options);
  }

  @Override
  public boolean wasStreamOpened() {
    return inputStreamOpened;
  }

  @Override
  public boolean wasStreamClosed() {
    return inputStreamClosed;

type NetLocker interface {
	// Do read lock for given LockArgs.  It should return
	// * a boolean to indicate success/failure of the operation
	// * an error on failure of lock request operation.
	RLock(ctx context.Context, args LockArgs) (bool, error)

	// Do write lock for given LockArgs. It should return
	// * a boolean to indicate success/failure of the operation
	// * an error on failure of lock request operation.

        }

        @Override
        public boolean removeAll(Collection<?> c) {
          return removeEntriesIf(Maps.keyPredicateOnEntries(in(c)));
        }

        @Override
        public boolean retainAll(Collection<?> c) {
          return removeEntriesIf(Maps.keyPredicateOnEntries(not(in(c))));
        }

        @Override
        public boolean remove(@Nullable Object o) {

    }

    @Override
    public boolean contains(Object object) {
      return standardContains(object);
    }

    @Override
    public boolean containsAll(Collection<?> collection) {
      return standardContainsAll(collection);
    }

    @Override
    public boolean remove(Object object) {
      return standardRemove(object);
    }

    @Override
    public boolean removeAll(Collection<?> collection) {

  public void clear() {
    delegate().clear();
  }

  @Override
  public boolean containsEntry(@Nullable Object key, @Nullable Object value) {
    return delegate().containsEntry(key, value);
  }

  @Override
  public boolean containsKey(@Nullable Object key) {
    return delegate().containsKey(key);
  }

  @Override
  public boolean containsValue(@Nullable Object value) {
    return delegate().containsValue(value);
  }

  public void clear() {
    delegate().clear();
  }

  @Override
  public boolean containsEntry(@Nullable Object key, @Nullable Object value) {
    return delegate().containsEntry(key, value);
  }

  @Override
  public boolean containsKey(@Nullable Object key) {
    return delegate().containsKey(key);
  }

  @Override
  public boolean containsValue(@Nullable Object value) {
    return delegate().containsValue(value);
  }

  private val isConscryptPreferred: Boolean
    get() {
      val preferredProvider = Security.getProviders()[0].name
      return "Conscrypt" == preferredProvider
    }

  private val isOpenJSSEPreferred: Boolean
    get() {
      val preferredProvider = Security.getProviders()[0].name
      return "OpenJSSE" == preferredProvider
    }

  private val isBouncyCastlePreferred: Boolean
    get() {

  ContiguousSet<C> headSetImpl(C toElement, boolean inclusive) {
    return this;
  }

  @Override
  ContiguousSet<C> subSetImpl(
      C fromElement, boolean fromInclusive, C toElement, boolean toInclusive) {
    return this;
  }

  @Override
  ContiguousSet<C> tailSetImpl(C fromElement, boolean fromInclusive) {
    return this;
  }

  @Override
  public boolean contains(@Nullable Object object) {

    }

    @Override
    public boolean remove(@Nullable Object key) {
      if (!contains(key)) {
        return false;
      }
      removeFromBothMaps(key);
      return true;
    }

    @Override
    public boolean removeAll(Collection<?> keysToRemove) {
      return standardRemoveAll(keysToRemove);
    }

    @Override
    public boolean retainAll(Collection<?> keysToRetain) {