public static Object unmarshall(byte[] content, Environment env, ClassLoader classloader) {
    MarshallerReaderContext context = null;
    try {
      ByteArrayInputStream stream = new ByteArrayInputStream(content);
      MarshallingConfigurationImpl marshallingConfigurationImpl = null;
      if (env != null) {
        marshallingConfigurationImpl =
            new MarshallingConfigurationImpl(
                (ObjectMarshallingStrategy[])
                    env.get(EnvironmentName.OBJECT_MARSHALLING_STRATEGIES),
                false,
                false);
      } else {
        marshallingConfigurationImpl =
            new MarshallingConfigurationImpl(
                new ObjectMarshallingStrategy[] {
                  new SerializablePlaceholderResolverStrategy(
                      ClassObjectMarshallingStrategyAcceptor.DEFAULT)
                },
                false,
                false);
      }
      ObjectMarshallingStrategyStore objectMarshallingStrategyStore =
          marshallingConfigurationImpl.getObjectMarshallingStrategyStore();
      context =
          new MarshallerReaderContext(
              stream, null, null, objectMarshallingStrategyStore, null, env);
      if (classloader != null) {
        context.classLoader = classloader;
      } else {
        context.classLoader = ContentMarshallerHelper.class.getClassLoader();
      }
      ExtensionRegistry registry = PersisterHelper.buildRegistry(context, null);
      Header _header = PersisterHelper.readFromStreamWithHeader(context, registry);
      Variable parseFrom = JBPMMessages.Variable.parseFrom(_header.getPayload(), registry);
      Object value = ProtobufProcessMarshaller.unmarshallVariableValue(context, parseFrom);

      if (value instanceof Map) {
        Map result = new HashMap();
        Map<String, Variable> variablesMap = (Map<String, Variable>) value;
        for (String key : variablesMap.keySet()) {
          result.put(
              key,
              ProtobufProcessMarshaller.unmarshallVariableValue(context, variablesMap.get(key)));
        }
        return result;
      }
      return value;
    } catch (Exception ex) {
      ex.printStackTrace();
    }
    return null;
  }
  public static ContentData marshal(Object o, Environment env) {
    MarshallerWriteContext context = null;
    ContentData content = null;
    try {
      MarshallingConfigurationImpl marshallingConfigurationImpl = null;
      if (env != null) {
        marshallingConfigurationImpl =
            new MarshallingConfigurationImpl(
                (ObjectMarshallingStrategy[])
                    env.get(EnvironmentName.OBJECT_MARSHALLING_STRATEGIES),
                false,
                false);
      } else {
        marshallingConfigurationImpl =
            new MarshallingConfigurationImpl(
                new ObjectMarshallingStrategy[] {
                  new SerializablePlaceholderResolverStrategy(
                      ClassObjectMarshallingStrategyAcceptor.DEFAULT)
                },
                false,
                false);
      }
      ObjectMarshallingStrategyStore objectMarshallingStrategyStore =
          marshallingConfigurationImpl.getObjectMarshallingStrategyStore();
      ByteArrayOutputStream stream = new ByteArrayOutputStream();

      context =
          new MarshallerWriteContext(stream, null, null, null, objectMarshallingStrategyStore, env);
      Variable marshallVariable = null;
      if (o instanceof Map) {
        marshallVariable =
            ProtobufProcessMarshaller.marshallVariablesMap(context, (Map<String, Object>) o);
      } else {
        marshallVariable = ProtobufProcessMarshaller.marshallVariable(context, "results", o);
      }
      PersisterHelper.writeToStreamWithHeader(context, marshallVariable);

      context.close();

      byte[] toByteArray = stream.toByteArray();

      content = new ContentData();
      content.setContent(toByteArray);
      content.setType(o.getClass().getCanonicalName());
      content.setAccessType(AccessType.Inline);

    } catch (IOException ex) {
      ex.printStackTrace();
    }
    return content;
  }