public static void main(String[] args) throws Exception {
        final ToBeTransformedClass instance = new ToBeTransformedClass();

        System.out.println("========================================");
        if (TtlAgent.isTtlAgentLoaded()) {
            System.out.println("Run WITH TTL Agent");
        } else {
            System.out.println("Run Without TTL Agent");
        }
        System.out.println(instance.toBeTransformedMethod(21));
        System.out.println("========================================");
    }
@see ToBeTransformedClass#toBeTransformedMethod(int)
@see com.alibaba.ttl.agent.extension_transformlet.sample.transformlet.SampleExtensionTransformlet#doTransform(ClassInfo)
ttl-integrations/sample-ttl-agent-extension-transformlet/src/main/java/com/alibaba/ttl/agent/extension_transformlet/sample/biz/SampleMain.java