Walks the step list and resolves all counts, producing a graph of
nodes, edges, and phases. Maintains a generalized stream model where
parallel tracks (from sources() or stratify()) are
stored as a list of active streams.
Walks the step list and resolves all counts, producing a graph of
nodes, edges, and phases. Maintains a generalized stream model where
parallel tracks (from sources() or stratify()) are
stored as a list of active streams.