@Override
    public Iterator vytvorIterator(eTypProhl typ) {
        if (typ == eTypProhl.HLOUBKA) {
            return new Iterator() {
                Prvek index = koren;
                IAbstrLIFO<Prvek> zasobnik = new AbstrLIFO<>();

                @Override
                public boolean hasNext() {
                    return (!zasobnik.jePrazdny() || index != null);
                }

                @Override
                public V next() {
                    while (index != null) {
                        zasobnik.vloz(index);
                        index = index.levy;
                    }
                    index = zasobnik.odeber();
                    V data = index.data;
                    index = index.pravy;
                    return data;
                }
            };
        } else {
            return new Iterator() {
                Prvek index = koren;
                IAbstrFIFO<Prvek> fronta = new AbstrFIFO<>();

                @Override
                public boolean hasNext() {
                    throw new UnsupportedOperationException("Not supported yet.");
                }

                @Override
                public V next() {
                    throw new UnsupportedOperationException("Not supported yet.");
                }
            };
        }
    }