***Note from Migration:***
Original Title was: Enhance transformers that modify results to be able to use a previous result in a subsequent calculation
Enhance transformers that modify results to be able to use a previous result in a subsequent calculation. e.g. AttributeCreator could create a attributes "A" and "B", then create attribute "C" = "A" + "B" in the same transformer. This functionality would be especially useful in the InlineQuerier, to be able to build "views" (Output Ports) that could be used in subsequent OutputPort SQL Queries.