@Override
    public java.util.concurrent.Future<DescribeClusterSubnetGroupsResult> describeClusterSubnetGroupsAsync(
            com.amazonaws.handlers.AsyncHandler<DescribeClusterSubnetGroupsRequest, DescribeClusterSubnetGroupsResult> asyncHandler) {

        return describeClusterSubnetGroupsAsync(new DescribeClusterSubnetGroupsRequest(), asyncHandler);
    }
Simplified method form for invoking the DescribeClusterSubnetGroups operation with an AsyncHandler.

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