```java SpringPluginManager pluginManager = new SpringPluginManager(new File("plugins").toPath()); DemoImpl implA = pluginManager.getExtension(DemoImpl.class,"xxxx").get(0); implA.setMessage("hello"); DemoImpl impB = pluginManager.getExtension(DemoImpl.class,"xxxx").get(0); String message = implB.getMessage(); // I want an unassigned message ``` `SpringExtensionFactory ` is written in `extensionClass.newInstance()`, But after the experiment, the message I get is still hello.I have no idea.