如何从Mono<Entity>中获取实体类型？

import reactor.core.publisher.Mono;

public class Main {
    public static void main(String[] args) {
        Mono<Entity> mono = Mono.just(new Entity());

        Class<? extends Entity> entityType = mono.block().getClass();
        System.out.println(entityType);
    }
}

class Entity {
    // 实体类的定义
}