static <T> HttpResult<T> of(HttpHeaders headers, T content, HttpHeaders trailers) {
        return new DefaultHttpResult<>(headers, requireNonNull(content, "content"), trailers);
    }
Creates a new {@link HttpResult} with the specified headers, content and trailers.

@param headers the HTTP headers
@param content the content of the response
@param trailers the HTTP trailers
core/src/main/java/com/linecorp/armeria/server/annotation/HttpResult.java