@Override
    public DescribeReservedInstanceOfferingsResult describeReservedInstanceOfferings(DescribeReservedInstanceOfferingsRequest request) {
        request = beforeClientExecution(request);
        return executeDescribeReservedInstanceOfferings(request);
    }
<p>
Describes the available Amazon OpenSearch Service Reserved Instance offerings for a given Region. For more
information, see <a href="https://docs.aws.amazon.com/opensearch-service/latest/developerguide/ri.html">Reserved
Instances in Amazon OpenSearch Service</a>.
</p>

@param describeReservedInstanceOfferingsRequest
       Container for the request parameters to a <code>DescribeReservedInstanceOfferings</code> operation.
@return Result of the DescribeReservedInstanceOfferings operation returned by the service.
@throws ResourceNotFoundException
        An exception for accessing or deleting a resource that doesn't exist.
@throws ValidationException
        An exception for accessing or deleting a resource that doesn't exist.
@throws DisabledOperationException
        An error occured because the client wanted to access an unsupported operation.
@throws InternalException
        Request processing failed because of an unknown error, exception, or internal failure.
@sample AmazonOpenSearch.DescribeReservedInstanceOfferings
aws-java-sdk-opensearch/src/main/java/com/amazonaws/services/opensearch/AmazonOpenSearchClient.java