protected Map<String, String> filterReservedHeaders(Http2Headers trailers) {
        if (trailers == null) {
            return Collections.emptyMap();
        }
        Map<String, String> excludeHeaders = new HashMap<>(trailers.size());
        for (Map.Entry<CharSequence, CharSequence> header : trailers) {
            String key = header.getKey().toString();
            if (TripleHeaderEnum.containsExcludeAttachments(key)) {
                excludeHeaders.put(key, trailers.getAndRemove(key).toString());
            }
        }
        return excludeHeaders;
    }
@Test
    void filterReservedHeaders() {}