code: static <T> StitchEvent<T> fromEvent(final Event event,
                                        final Decoder<T> decoder) {
      return new StitchEvent<>(event.getEventName(), event.getData(), decoder);
    }
docs: Convert a SSE to a Stitch SSE
  @param event SSE to convert
  @param decoder decoder for decoding data
  @param <T> type to decode data to
  @return a Stitch server-sent event