private final @Nullable Object[] passedArgs;
    private final @Nullable Object returnValue;
    private final AtomicInteger called = new AtomicInteger();

    InteractionTester(Class<T> interfaceType, Method method) {
      this.interfaceType = interfaceType;
      this.method = method;
      this.passedArgs = getParameterValues(method);
      this.returnValue = new FreshValueGenerator().generateFresh(method.getReturnType());
    }

    private final @Nullable Object[] passedArgs;
    private final @Nullable Object returnValue;
    private final AtomicInteger called = new AtomicInteger();

    InteractionTester(Class<T> interfaceType, Method method) {
      this.interfaceType = interfaceType;
      this.method = method;
      this.passedArgs = getParameterValues(method);
      this.returnValue = new FreshValueGenerator().generateFresh(method.getReturnType());
    }

    }

    this.values = values;
  }

  @Override
  final void collectOneValue(int index, @ParametricNullness V returnValue) {
    @RetainedLocalRef List<@Nullable Present<V>> localValues = values;
    if (localValues != null) {
      localValues.set(index, new Present<>(returnValue));
    }
  }

  @Override
  final void handleAllCompleted() {
    @RetainedLocalRef List<@Nullable Present<V>> localValues = values;