code: @Override
      public GetReservationPurchaseRecommendationResult getReservationPurchaseRecommendation(GetReservationPurchaseRecommendationRequest request) {
          request = beforeClientExecution(request);
          return executeGetReservationPurchaseRecommendation(request);
      }
docs: <p>
  Gets recommendations for which reservations to purchase. These recommendations could help you reduce your costs.
  Reservations provide a discounted hourly rate (up to 75%) compared to On-Demand pricing.
  </p>
  <p>
  AWS generates your recommendations by identifying your On-Demand usage during a specific time period and
  collecting your usage into categories that are eligible for a reservation. After AWS has these categories, it
  simulates every combination of reservations in each category of usage to identify the best number of each type of
  RI to purchase to maximize your estimated savings.
  </p>
  <p>
  For example, AWS automatically aggregates your Amazon EC2 Linux, shared tenancy, and c4 family usage in the US
  West (Oregon) Region and recommends that you buy size-flexible regional reservations to apply to the c4 family
  usage. AWS recommends the smallest size instance in an instance family. This makes it easier to purchase a
  size-flexible RI. AWS also shows the equal number of normalized units so that you can purchase any instance size
  that you want. For this example, your RI recommendation would be for <code>c4.large</code> because that is the
  smallest size instance in the c4 instance family.
  </p>
  
  @param getReservationPurchaseRecommendationRequest
  @return Result of the GetReservationPurchaseRecommendation operation returned by the service.
  @throws LimitExceededException
  You made too many calls in a short period of time. Try again later.
  @throws DataUnavailableException
  The requested data is unavailable.
  @throws InvalidNextTokenException
  The pagination token is invalid. Try again without a pagination token.
  @sample AWSCostExplorer.GetReservationPurchaseRecommendation
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/ce-2017-10-25/GetReservationPurchaseRecommendation"
  target="_top">AWS API Documentation</a>