import { Extent } from "./extent";
export declare enum OrderingState {
    Untracked = 0,
    NeedsOrdering = 1,
    Clearing = 2,
    Ordering = 3,
    Ordered = 4
}
export interface DateProvider {
    now(): Date;
}
export declare enum RelinkingOrder {
    relinkingOrderPrior = 0,
    relinkingOrderSubsequent = 1
}
export declare enum RelinkingTarget {
    demand = 0,
    supply = 1
}
export declare enum ResourceType {
    resource = 0,
    moment = 1,
    typedMoment = 2,
    state = 3
}
export declare enum LinkType {
    reactive = 0,
    order = 1
}
export declare class GraphEvent {
    sequence: number;
    timestamp: Date;
    static readonly initialEvent: GraphEvent;
    constructor(sequence: number, timestamp: Date);
}
export interface Transient {
    clear(): void;
}
export interface Subscription {
    extent: Extent | null;
    callback: (extent: Extent | null) => void;
}