/**
     * Get the value for the key 'rate.limit.cleanup.interval'. <br>
     * The value is, e.g. 1000 <br>
     * comment: Number of requests between cleanup operations to prevent memory leaks.
     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     */
    String getRateLimitCleanupInterval();

    /**