code: public Long getNextStreamPosition() {
          String longValue = getPropertyAsString(FIELD_NEXT_STREAM_POSITION);
          return Long.parseLong(longValue.replace("\"", ""));
      }
docs: Gets the next position in the event stream that you should request in order to get the next events.
  
  @return next position in the event stream to request in order to get the next events.