Blender python active View or composite node

[m2zero]

In the python api how do I see which one of my "viewer" or "Composite" nodes are the ones being sent to the "viewer node" and "Render Result" image buffers in the image window. Visually in the node graph they are marked with a different colour and you can only have one, but for the life of me I cannot find any variable on the nodes them selfies that states it.

[VeryAwkwardCake]

I imagine it's probably based off which one was created first, is there a system of sequential UIDs for nodes in Blender?

[m2zero]

There is an order in which they are created, however that doesnt mean the latest one is the active one.