private static boolean isRelativePath(Bytes path) {
        return path.length == 0 || path.data[0] != '/' || path.isEncoded(0);
    }
Marks this {@link RequestTarget} as stored in {@link RequestTargetCache} so that it doesn't
try to store again.
core/src/main/java/com/linecorp/armeria/internal/common/DefaultRequestTarget.java