Duplicate Dataflow

There should be an ability to copy the entire dataflow.

For example: we have run into the scenario several times where we would like to update the input source data. The original dataflow extract may have contained a static load from an excel file. We conducted multiple transforms using this excel file and the dataflow had dozens of cards attached. If we choose to change this source to a dynamic view we created in our data warehouse that updates daily, there is no way of testing to see if it breaks somewhere. If we copied the entire dataflow and then input the data warehouse source, we could test that dataflow prior to migrating the view into our original dataflow.