@Override
    public void addPermissions(Set<ObjectPermission> permissions)
            throws GuacamoleException {
        throw new GuacamoleSecurityException("Permission denied.");
    }
Sets the Set which backs this SimpleObjectPermissionSet. Future function
calls on this SimpleObjectPermissionSet will use the provided Set.

@param permissions 
    The Set of permissions this SimpleObjectPermissionSet should
    contain.
guacamole-ext/src/main/java/org/apache/guacamole/net/auth/simple/SimpleObjectPermissionSet.java