docs: private synchronized void clear() {
  
          if (!isEnabled()) {
              return;
          }
          m_keyCache.clear();
          m_size = 0;
  
          m_variationCache.clear();
  
          if (LOG.isInfoEnabled()) {
              LOG.info(Messages.get().getBundle().key(Messages.LOG_FLEXCACHE_CLEAR_0));
          }
      }