Get minimum using java lambda

Minimum.java

//Pick the cheapest plan
    final AdjustmentPlan plan =  plans.stream()
        .min(Comparator.comparing(AdjustmentPlan::getMultiplier))
        .orElse(null);

    final Double multiplier = plan != null ? plan.getMultiplier() : 1.0;

    List<String> exceptions = new ArrayList<>();

    if (plan != null && PlanType.EXCEPTION.equals(plan.getPlanType())) {
      exceptions.add(plan.getName());
    }

    final Double finalRate = dpsResponse.getPrice() * multiplier;