public void GetAllOverlappingValues_IIntervalSearch()
        {
            var intervalSearch = new NullIntervalSearch <string>();

            Assert.Null(intervalSearch.GetAllOverlappingValues(1, 2));
        }
        public void GetAllOverlappingValues_IIntervalForest()
        {
            var intervalForest = new NullIntervalSearch <string>();

            Assert.Null(intervalForest.GetAllOverlappingValues(1, 2, 3));
        }