public void TestPortListToMap()
        {
            ImmutableHashSet <Port> input = ImmutableHashSet.Create(Port.Tcp(1000), Port.Udp(2000));
            ImmutableSortedDictionary <string, IDictionary <object, object> > expected =
                new Dictionary <string, IDictionary <object, object> >
            {
                ["1000/tcp"] = ImmutableDictionary.Create <object, object>(),
                ["2000/udp"] = ImmutableDictionary.Create <object, object>()
            }.ToImmutableSortedDictionary();

            Assert.AreEqual(expected, ImageToJsonTranslator.PortSetToMap(input));
        }