public abstract class GrafAbstrakcyjny<T, K> : IGraf<T, K>
    {
        protected readonly List<T> Wierzholki = new List<T>();
        protected readonly List<IPara<T>> Krawedzie = new List<IPara<T>>();
        protected readonly Dictionary<IPara<T>, K> Wagi = new Dictionary<IPara<T>, K>();
        protected List<IPara<T>> Skojarzenia = new List<IPara<T>>();
        protected Dictionary<IPara<T>, bool> OdwiedzoneKrawedzie = new Dictionary<IPara<T>, bool>();
        protected Dictionary<T, bool> OdwiedzoneWierzholki = new Dictionary<T, bool>();
        protected List<T> Zbior_V1 = new List<T>();
        protected List<T> Zbior_V2 = new List<T>();
        protected Dictionary<T, K> Etykiety = new Dictionary<T, K>();