// implements Kosaraju's algorithm (https://en.wikipedia.org/wiki/Kosaraju%27s_algorithm)
public IDictionary <GraphNode <T>, T> KosarajuScc(DirectedGraph <T> graph)
{
_nodeToScc.Clear();
_visitOrder = new LinkedList <GraphNode <T> >();
foreach (var node in graph.Nodes)
{
Visit(graph, node);
}
graph.ClearNodeColors();
var inNeighbors = graph.GetInNeighbors();
foreach (var node in _visitOrder)
{
if (node.Color == Color.Colored)
{
continue;
}
ComponentVisit(node, node.Label, inNeighbors);
}
return(_nodeToScc);
}