public void Clear()
        {
            var registry     = new UTinyRegistry();
            var builtInCount = registry.Count;

            var type    = registry.CreateType(UTinyId.New(), "TestType", UTinyTypeCode.Component);
            var typeRef = (UTinyType.Reference)type;

            Assert.AreEqual(builtInCount + 1, registry.Count);

            registry.Clear();
            Assert.AreEqual(builtInCount, registry.Count);
            Assert.IsNull(typeRef.Dereference(registry));
        }