The graph code is getting bug so this PR also refactors it into it's own class.
Instead of all the flows starting and ending in the same nodes ("start" and "end"), link recirc_0 flows to their input port and link flows that output data to their output port
The graph code is getting bug so this PR also refactors it into it's own class.
Instead of all the flows starting and ending in the same nodes ("start" and "end"), link recirc_0 flows to their input port and link flows that output data to their output port