@Override
    public DescribeReleaseLabelResult describeReleaseLabel(DescribeReleaseLabelRequest request) {
        request = beforeClientExecution(request);
        return executeDescribeReleaseLabel(request);
    }
<p>
Provides Amazon EMR release label details, such as the releases available the Region where the API request is
run, and the available applications for a specific Amazon EMR release label. Can also list Amazon EMR releases
that support a specified version of Spark.
</p>

@param describeReleaseLabelRequest
@return Result of the DescribeReleaseLabel operation returned by the service.
@throws InternalServerException
        This exception occurs when there is an internal failure in the Amazon EMR service.
@throws InvalidRequestException
        This exception occurs when there is something wrong with user input.
@sample AmazonElasticMapReduce.DescribeReleaseLabel
@see <a href="http://docs.aws.amazon.com/goto/WebAPI/elasticmapreduce-2009-03-31/DescribeReleaseLabel"
     target="_top">AWS API Documentation</a>
aws-java-sdk-emr/src/main/java/com/amazonaws/services/elasticmapreduce/AmazonElasticMapReduceClient.java