public static void FillGraph(IGraph <int> graph, TestConfiguration conf)
        {
            if (String.IsNullOrEmpty(conf.TestFile))
            {
                GraphGenerator.FillGraph(graph, conf.Levels, conf.Descendants, conf.Precedents);
                return;
            }
            var sequencesToAdd = LoadSequencesFromFile(conf.TestFile);

            graph.AddSequences(sequencesToAdd);
        }