private static void PrintStep(PuzzleSolutionStep step)
 {
     Debug.WriteLine("{0}{1}\t\t\t{2}{3}", step.SourceBucketStep.Operation, step.SourceBucketStep.State, step.TargetBucketStep.Operation, step.TargetBucketStep.State);
 }
 public void AddStep(PuzzleSolutionStep step)
 {
     _solutionsSteps.Add(step);
 }