public SearchedResources<SelectorDTO> searchSelectors(final String keyword, final int page, final int pageSize, final String... plugins) {
        SelectorQueryCondition condition = SelectorQueryCondition.builder()
                .keyword(keyword)
                .plugins(plugins)
                .switchStatus(true)
                .build();
        return search("/selector/list/search", page, pageSize, condition, SEARCHED_SELECTORS_TYPE_REFERENCE);
    }
Fetch the selectors by the given conditions.

@param keyword  expected selectors included the word. return all if absent.
@param page     page.
@param pageSize size.
@param plugins  expected selectors under specified plugins. return all if absent.
@return paginated info with  list of {@link SelectorDTO}s
shenyu-e2e/shenyu-e2e-client/src/main/java/org/apache/shenyu/e2e/client/admin/AdminClient.java