internal Fixup(SerializationInstance instance, object o, SerializationFixup fix, ulong[] required_ids)
 {
     Completed   = false;
     Fix         = fix;
     Instance    = instance;
     Object      = o;
     RequiredIDs = new ulong[required_ids.Length];
     required_ids.CopyTo(RequiredIDs, 0);
 }
 internal ProxyFormatter(SerializationInstance instance, SerializationInfo info)
 {
     Instance = instance;
     Info     = info;
 }