sprinboot+mybatis SeataRestTemplateAutoConfiguration

这段逻辑是什么意思

```
@PostConstruct
public void init() {
if (this.restTemplates != null) {
Iterator var1 = this.restTemplates.iterator();

while (var1.hasNext()) {
RestTemplate restTemplate = (RestTemplate) var1.next();
List interceptors = new ArrayList(restTemplate.getInterceptors());
interceptors.add(this.seataRestTemplateInterceptor);
restTemplate.setInterceptors(interceptors);
}
}

}

```

Start at SeataRestTemplateAutoConfiguration.init(), the entry point shown in the issue, and read the surrounding configuration and interceptor declarations. Done means documenting what the null check, interceptor list handling, and @PostConstruct timing mean for the configured RestTemplate instances.

Written by the indexing model from the issue text.