@Override
    public ListInstanceGroupsResult listInstanceGroups(ListInstanceGroupsRequest request) {
        request = beforeClientExecution(request);
        return executeListInstanceGroups(request);
    }
<p>
Provides all available details about the instance groups in a cluster.
</p>

@param listInstanceGroupsRequest
       This input determines which instance groups to retrieve.
@return Result of the ListInstanceGroups 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.ListInstanceGroups
@see <a href="http://docs.aws.amazon.com/goto/WebAPI/elasticmapreduce-2009-03-31/ListInstanceGroups"
     target="_top">AWS API Documentation</a>
aws-java-sdk-emr/src/main/java/com/amazonaws/services/elasticmapreduce/AmazonElasticMapReduceClient.java