Spring State Machine - Why documentation use static classes

In Spring Statemachine the main example use static classes for @Configuration

@Configuration
@EnableStateMachine
static class Config1 extends EnumStateMachineConfigurerAdapter<States, Events> {

And Beans

@WithStateMachine
static class MyBean {

Also using @Autowired:

static class MyApp {
   @Autowired
   StateMachine<States, Events> stateMachine;

Is it old/sample documentation that can be ignored or is there a real reason/need to use static classes?

Solution

Is it old/sample documentation that can be ignored or is there a real reason/need to use static classes?

Yes.