* @param autoAssign Whether any of the rows in the graph have any
* auto-assign constraints
*/
private DepthFirstAnalysis recalculateDepthFirstAnalysis(Graph graph,
boolean autoAssign) {
DepthFirstAnalysis dfa;
// clear previous traversal data
graph.clearTraversal();
dfa = newDepthFirstAnalysis(graph, autoAssign);
// make sure that the graph is non-cyclic now
assert (dfa.hasNoCycles()): _loc.get("graph-not-cycle-free");
return dfa;
}