public void ForgotAllTypesAndSerializers()
{
_loaders.Clear();
_newDescriptorSavers.Clear();
foreach (var p in _descriptorSet)
{
p.Key.ClearMappingToType();
}
_descriptorSet.Clear();
_type2DescriptorMap = new ConcurrentDictionary<Type, ITypeDescriptor>(EnumDefaultTypes(), ReferenceEqualityComparer<Type>.Instance);
}