public UUID getUUID() {
        return uuid;
    }
Returns a UUID that uniquely identifies this record. If not implemented
by the extension exposing this history record, this may be null.

@return
    A UUID that uniquely identifies this record, or null if no such
    unique identifier exists.
guacamole/src/main/java/org/apache/guacamole/rest/history/APIActivityRecord.java