validatorSet.addValidator(new FlowElementValidator());
validatorSet.addValidator(new StartEventValidator());
validatorSet.addValidator(new SequenceflowValidator());
validatorSet.addValidator(new UserTaskValidator());
validatorSet.addValidator(new ServiceTaskValidator());
validatorSet.addValidator(new ScriptTaskValidator());
validatorSet.addValidator(new SendTaskValidator());
validatorSet.addValidator(new ExclusiveGatewayValidator());
validatorSet.addValidator(new EventGatewayValidator());
validatorSet.addValidator(new SubprocessValidator());