code: public static boolean determineObject(String key) {
          if (!exists()) {
              throwThreadCacheNotInitializedException(key);
          }
          final Object obj = threadLocal.get().get(key);
          return obj != null && (boolean) obj;
      }
docs: Determine the object as boolean.
  @param key The key of the object. (NotNull)
  @return The determination, true or false. (true if the object exists and true)