public static void writeTruthMaintenanceSystem(
      MarshallerWriteContext context, EntryPoint wmep, ProtobufMessages.EntryPoint.Builder _epb)
      throws IOException {
    TruthMaintenanceSystem tms = ((NamedEntryPoint) wmep).getTruthMaintenanceSystem();
    ObjectHashMap justifiedMap = tms.getEqualityKeyMap();

    if (!justifiedMap.isEmpty()) {
      EqualityKey[] keys = new EqualityKey[justifiedMap.size()];
      org.drools.core.util.Iterator it = justifiedMap.iterator();
      int i = 0;
      for (org.drools.core.util.ObjectHashMap.ObjectEntry entry =
              (org.drools.core.util.ObjectHashMap.ObjectEntry) it.next();
          entry != null;
          entry = (org.drools.core.util.ObjectHashMap.ObjectEntry) it.next()) {
        EqualityKey key = (EqualityKey) entry.getKey();
        keys[i++] = key;
      }

      Arrays.sort(keys, EqualityKeySorter.instance);

      ProtobufMessages.TruthMaintenanceSystem.Builder _tms =
          ProtobufMessages.TruthMaintenanceSystem.newBuilder();

      // write the assert map of Equality keys
      for (EqualityKey key : keys) {
        ProtobufMessages.EqualityKey.Builder _key = ProtobufMessages.EqualityKey.newBuilder();
        _key.setStatus(key.getStatus());
        _key.setHandleId(key.getFactHandle().getId());

        if (key.size() > 1) {
          // add all the other key's if they exist
          FastIterator keyIter = key.fastIterator();
          for (DefaultFactHandle handle = key.getFirst().getNext();
              handle != null;
              handle = (DefaultFactHandle) keyIter.next(handle)) {
            _key.addOtherHandle(handle.getId());
          }
        }

        if (key.getBeliefSet() != null) {
          writeBeliefSet(context, key.getBeliefSet(), _key);
        }

        _tms.addKey(_key.build());
      }

      _epb.setTms(_tms.build());
    }
  }