code: public LoadStoreCount getLoadStoreCount(XField field) {
          LoadStoreCount loadStoreCount = loadStoreCountMap.get(field);
          if (loadStoreCount == null) {
              loadStoreCount = new LoadStoreCount();
              loadStoreCountMap.put(field, loadStoreCount);
          }
          return loadStoreCount;
      }
docs: Get the number of times given field is loaded and stored within the
  method.
  
  @param field
  the field
  @return the load/store count object