pub fn loose(graph: &Graph, units: &[Unit]) -> Vec<(String, u64)>Expand description
The instances of graph no unit of units holds, each with the bits its links carry to the units’ instances,
heaviest first (then by path), those carrying none left out: a path between two units through an instance no unit
holds is no wire of the floorplan’s (unit_wires counts links between units’ instances alone) until its module is
dissolved into the graph (netlist::module_graph’s through).