code: void addFieldInfo(String className, List<FieldInfo> fieldInfoList) {
          if (ivFieldInfoMap == null) {
              ivFieldInfoMap = new HashMap<String, List<FieldInfo>>();
          }
          ivFieldInfoMap.put(className, fieldInfoList);
      }
docs: Adds the className and fieldInfoList to the ivFieldInfoMap.
  
  @param className
  @param fieldInfoList