Allow multiple queries in data sources
It would be great to be able to use the response to a first request sent from a data source in subsequent requests. This is because APIs of real-world data sources often assume iterative requests. Example:
1. Call 'GetListofThings' -> response = list of IDs of all things
2. Call (in a loop) 'GetDetailsOnId(iD)'
Currently only two requests are possible: an authentication one and one to retrieve the data itself.