@CanIgnoreReturnValue
  public final double getAndAccumulate(int i, double x, DoubleBinaryOperator accumulatorFunction) {
    checkNotNull(accumulatorFunction);
    return getAndUpdate(i, oldValue -> accumulatorFunction.applyAsDouble(oldValue, x));
  }

  /**
   * Atomically updates the element at index {@code i} with the results of applying the given
   * function to the current and given values.
   *
   * @param i the index to update

   */
  @CanIgnoreReturnValue
  public final double getAndAccumulate(double x, DoubleBinaryOperator accumulatorFunction) {
    checkNotNull(accumulatorFunction);
    return getAndUpdate(oldValue -> accumulatorFunction.applyAsDouble(oldValue, x));
  }

  /**
   * Atomically updates the current value with the results of applying the given function to the
   * current and given values.
   *
   * @param x the update value