code: public static Map<Object, Integer> countTotalAnnotationsPerCategory(
  			final ICodingAnnotationStudy study) {
  		Map<Object, Integer> result = new HashMap<Object, Integer>();
  		for (ICodingAnnotationItem item : study.getItems()) {
  			if (item.getRaterCount() <= 1) {
                  continue;
              }
  
  			for (IAnnotationUnit unit : item.getUnits()) {
  				Object category = unit.getCategory();
  				if (category == null) {
                      continue;
                  }
  
  				Integer count = result.get(category);
  				if (count == null) {
                      result.put(category, 1);
                  }
                  else {
                      result.put(category, count + 1);
                  }
  			}
  		}
  		return result;
  	}
docs: Category -> #