/**
 * A timestamp used to break ties during collaborative editing.
 * If multiple users edit a property at the same time, the edit with the last timestamp "wins".
 *
 * Specifically, `CollabTimestamp` is a [Lamport timestamp](https://en.wikipedia.org/wiki/Lamport_timestamp),
 * consisting of a logical clock and a tiebreaker (`replicaId`, a UUID that is created fresh for each diagram).
 */
export type CollabTimestamp = [clock: number, replicaId: string];
/**
 * Returns whether the incoming timestamp wins over the existing timestamp.
 *
 * In the DiagramModel, timestamps that have never been set are left null;
 * `timestampWins` treats that as an "initial timestamp" that loses to all LogicalTimestamps.
 */
export declare function timestampWins(incoming: CollabTimestamp, existing: CollabTimestamp | null | undefined): boolean;
/**
 * A nested collection of CollabTimestamps associated to a ValueSet.
 * @see ValueSet
 */
export type CollabTimestampSet = {
    [key: string]: CollabTimestamp | CollabTimestampSet;
};