A node which is a constant in a graph, typically used in dynamic graphs as leaves. The data is either a tensor or the default factory can make a tensor from it.

Like let except the right-hand-side of each let binding is wrapped in node/with-scope using the string name of the left-hand-side variable. The goal is to properly nest the names of all nodes and parameters in graph

   (let-scope
     [left (module/affine model 10 [5])
      right (module/affine model 10 [5])]
     (cg/+ left right))

Then the model has ("left/W","left/b", "right/W", "right/b")

fully qualified node name with scopes

everything in body gets the scope appended to default scope