Newtonsoft.Json.Utilities.ImmutableCollectionsUtils
Helper class for serializing immutable collections.
Note that this is used by all builds, even those that don't support immutable collections, in case the DLL is GACed
https://github.com/JamesNK/Newtonsoft.Json/issues/652
namespace Newtonsoft.Json.Utilities
{
internal static class ImmutableCollectionsUtils
{
}
}