@VisibleForTesting
    public static Set<String> cachedClientPaths() {
        assert CLIENT_CACHE != null : "CLIENT_CACHE";
        return CLIENT_CACHE.asMap().keySet();
    }
Returns client-side paths that have had their parse result cached. Only for use in tests.
core/src/main/java/com/linecorp/armeria/internal/common/RequestTargetCache.java