@Override
        public File getBaseDir() {
            return reference.cache.getBaseDir();
        }

        @Override
        public Collection<File> getReservedCacheFiles() {
            return reference.cache.getReservedCacheFiles();
        }

        @Override
        public <K, V> IndexedCache<K, V> createIndexedCache(IndexedCacheParameters<K, V> parameters) {

     */
    File getBaseDir();

    /**
     * Returns the files used by this store for internal tracking
     * which should be exempt from the cleanup.
     */
    Collection<File> getReservedCacheFiles();

    String getDisplayName();

                cacheAccess = null;
            }
        }
    }

    @Override
    public File getBaseDir() {
        return dir;
    }

    @Override
    public Collection<File> getReservedCacheFiles() {
        return Arrays.asList(propertiesFile, gcFile, determineLockTargetFile(getLockTarget()));
    }

    static File determineLockTargetFile(File target) {

                }
            }
        }

        @Override
        public File getBaseDir() {
            return cacheDir;
        }

        @Override
        public Collection<File> getReservedCacheFiles() {
            return Collections.emptyList();
        }

        private void assertNotClosed() {
            if (closed) {
                throw new IllegalStateException("cache is closed");