code: public static HttpResponse fromEvent(HttpHeaders headers, ServerSentEvent sse,
                                           HttpHeaders trailingHeaders) {
          requireNonNull(headers, "headers");
          requireNonNull(sse, "sse");
          requireNonNull(trailingHeaders, "trailingHeaders");
          return HttpResponse.of(sanitizeHeaders(headers), toHttpData(sse), trailingHeaders);
      }
docs: Creates a new Server-Sent Events stream of the specified {@code content}.
  
  @param headers the HTTP headers supposed to send
  @param sse the {@link ServerSentEvent} object supposed to send as contents
  @param trailingHeaders the trailing HTTP headers supposed to send