public static IEnumerable <V> GetVertexPredecessors(
IDirectedGraph <V, E> graph,
V vertex)
{
var predecessors = new List <V>();
var edges = graph.IncomingEdgesOf(vertex);
foreach (var edge in edges)
{
predecessors.Add(GetOppositeVertex(graph, edge, vertex));
}
return(predecessors);
}
