private static final String USERNAME = Config.getProperty("jcifs.smb1.smb.client.username", null);
    private static final int CACHE_POLICY = Config.getInt("jcifs.smb1.netbios.cachePolicy", 60 * 10) * 60; /* 10 hours */

    static NbtAddress[] dc_list = null;
    static long dc_list_expiration;
    static int dc_list_counter;

     *
     * @return maximum number of retries for netbios requests
     */
    int getNetbiosRetryCount();

    /**
     *
     *
     * Property {@code jcifs.netbios.cachePolicy} in minutes (int, default 600)
     *
     * @return netbios cache timeout, in seconds, 0 - disable caching, -1 - cache forever
     */
    int getNetbiosCachePolicy();

    /**

    }

    static void cacheAddress(final Name hostName, final NbtAddress addr) {
        if (CACHE_POLICY == 0) {
            return;
        }
        long expiration = -1;
        if (CACHE_POLICY != FOREVER) {
            expiration = System.currentTimeMillis() + CACHE_POLICY * 1000;
        }
        cacheAddress(hostName, addr, expiration);
    }