@Override
    public java.util.concurrent.Future<DescribeClusterVersionsResult> describeClusterVersionsAsync(
            com.amazonaws.handlers.AsyncHandler<DescribeClusterVersionsRequest, DescribeClusterVersionsResult> asyncHandler) {

        return describeClusterVersionsAsync(new DescribeClusterVersionsRequest(), asyncHandler);
    }
Simplified method form for invoking the DescribeClusterVersions operation with an AsyncHandler.

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