@Override
    public java.util.concurrent.Future<DescribeClusterSubnetGroupsResult> describeClusterSubnetGroupsAsync() {

        return describeClusterSubnetGroupsAsync(new DescribeClusterSubnetGroupsRequest());
    }
Simplified method form for invoking the DescribeClusterSubnetGroups operation.

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