Thank you for your comment.
I would prefer to have both, so far I see none in the results.
I tested a simple example [e.g. making tea- kettle/teapot/teacup] and added the electricity mix flow in the excel file- input flows with its unique UUID from the database, which carries some default providers, however the code crashed. I imagine I need to change the path of that flow to be read, and somehow get the providers of that flow...
In that simple example, I don't see in the product system - model graph the link between the exchanges. I created a product system called 'tea with milk' and there is no connection between the three processes[ kettle/teapot/teacup].
In my understanding, I should be able to see the connection between the processes, since I defined which is an 'in' and which is an 'out' in the exchange level. However, I believe I need also the processLink class to be defined and it is not clear how....
Thank you for your time.