@GetMapping("/selectorTrie")
    public Flux<Set<String>> getSelectorTrieKeys() {
        ShenyuTrie selectorTrie = SpringBeanUtils.getInstance().getBean(TrieCacheTypeEnum.SELECTOR.getTrieType());
        return Flux.just(selectorTrie.getKeyRootKeys());
    }
get selector trie cache key set.

@return trie cache key sets
shenyu-web/src/main/java/org/apache/shenyu/web/endpoint/ShenyuControllerEndpoint.java