code: public GetWaterMarkResponse getWaterMark(String watermarkId) {
          GetWaterMarkRequest request = new GetWaterMarkRequest().withWatermarkId(watermarkId);
          return getWaterMark(request);
      }
docs: Get a water mark for a given water mark ID.
  
  @param watermarkId The ID of water mark.
  @return The information of the water mark.