code: public static HttpResponse fromStream(HttpHeaders headers, Stream<?> contentStream,
                                            HttpHeaders trailingHeaders, Executor executor,
                                            ObjectMapper mapper) {
          requireNonNull(mapper, "mapper");
          return streamingFrom(contentStream, sanitizeHeaders(headers), trailingHeaders,
                               o -> toHttpData(mapper, o), executor);
      }
docs: Creates a new JSON Text Sequences from the specified {@link Stream}.
  
  @param headers the HTTP headers supposed to send
  @param contentStream the {@link Stream} which publishes the objects supposed to send as contents
  @param trailingHeaders the trailing HTTP headers supposed to send
  @param executor the executor which iterates the stream
  @param mapper the mapper which converts the content object into JSON Text Sequences