code: public static String getClassName(Map<String, Object> map) {
          String className = null;
  
          if (map.containsKey(MAP_CLASS_NAME) == true) {
              className = (String) map.get(MAP_CLASS_NAME);
          }
  
          return className;
      }
docs: InputHandler converts every object into Map.
  This function returns Class name of object from which this Map was created.
  
  @param map Map from which Class name would be returned
  @return Class name from which Map was built