public Task<DescribeReplicationInstancesResponse> DescribeReplicationInstancesAsync(DescribeReplicationInstancesRequest request, System.Threading.CancellationToken cancellationToken = default(CancellationToken))
{
var marshaller = new DescribeReplicationInstancesRequestMarshaller();
var unmarshaller = DescribeReplicationInstancesResponseUnmarshaller.Instance;
return InvokeAsync<DescribeReplicationInstancesRequest,DescribeReplicationInstancesResponse>(request, marshaller,
unmarshaller, cancellationToken);
}