@Override
    public java.util.concurrent.Future<DescribeClusterVersionsResult> describeClusterVersionsAsync() {

        return describeClusterVersionsAsync(new DescribeClusterVersionsRequest());
    }
Simplified method form for invoking the DescribeClusterVersions operation.

@see #describeClusterVersionsAsync(DescribeClusterVersionsRequest)
aws-java-sdk-redshift/src/main/java/com/amazonaws/services/redshift/AmazonRedshiftAsyncClient.java