return existingKey;
                }
            }

            // Check if we've reached max leases
            int maxLeases = context.getConfig().getMaxLeases();
            if (maxLeases > 0 && leases.size() >= maxLeases) {
                // Clean up oldest leases
                evictOldestLeases(1);
            }

            // Create new lease

    protected boolean useLease = true;
    /** Lease timeout in milliseconds */
    protected int leaseTimeout = 30000;
    /** Maximum number of concurrent leases */
    protected int maxLeases = 1000;
    /** Preferred lease version (1 or 2) */
    protected int leaseVersion = 2;
    /** Lease break timeout in seconds (per MS-SMB2 spec) */
    protected int leaseBreakTimeout = 60;

    public static final String USE_LEASES = "jcifs.smb.client.useLeases";
    public static final String LEASE_TIMEOUT = "jcifs.smb.client.leaseTimeout";
    public static final String MAX_LEASES = "jcifs.smb.client.maxLeases";
    public static final String LEASE_VERSION = "jcifs.smb.client.leaseVersion";
    
    public boolean isUseLeases() {
        return getBooleanProperty(USE_LEASES, true);
    }
    

     *
     * @return lease timeout in milliseconds
     * @since 2.2
     */
    int getLeaseTimeout();

    /**
     * Property {@code jcifs.smb.client.maxLeases} (int, default 1000)
     *
     * @return maximum number of concurrent leases
     * @since 2.2
     */
    int getMaxLeases();

    /**