return
	}
	err = en.WriteUint8(uint8(z.Type))
	if err != nil {
		err = msgp.WrapError(err, "Type")
		return
	}
	err = en.WriteUint8(uint8(z.Flags))
	if err != nil {
		err = msgp.WrapError(err, "Flags")
		return
	}
	err = en.WriteUint8(z.EcN)
	if err != nil {
		err = msgp.WrapError(err, "EcN")
		return
	}
	err = en.WriteUint8(z.EcM)
	if err != nil {

		err = en.Append(0xa2, 0x6e, 0x76)
		if err != nil {
			return
		}
		err = en.WriteInt(za0002.NumVersions)
		if err != nil {
			err = msgp.WrapError(err, "Tiers", za0001, "NumVersions")
			return
		}
		// write "no"
		err = en.Append(0xa2, 0x6e, 0x6f)
		if err != nil {
			return
		}
		err = en.WriteInt(za0002.NumObjects)
		if err != nil {
			err = msgp.WrapError(err, "Tiers", za0001, "NumObjects")

    }

    @Override
    protected ConcurrentMap<K, V> delegate() {
      return delegate;
    }

    void writeMapTo(ObjectOutputStream out) throws IOException {
      out.writeInt(delegate.size());
      for (Entry<K, V> entry : delegate.entrySet()) {
        out.writeObject(entry.getKey());
        out.writeObject(entry.getValue());
      }
      out.writeObject(null); // terminate entries

    }

    @Override
    protected ConcurrentMap<K, V> delegate() {
      return delegate;
    }

    void writeMapTo(ObjectOutputStream out) throws IOException {
      out.writeInt(delegate.size());
      for (Entry<K, V> entry : delegate.entrySet()) {
        out.writeObject(entry.getKey());
        out.writeObject(entry.getValue());
      }
      out.writeObject(null); // terminate entries