import { SubscriberRef, SubscriptionRef } from "../subscription-ref";
import { BasePlugin } from "./plugin";
export interface GraphRef {
    depth: number;
    flattened: boolean;
    flattenings: SubscriptionRef[];
    flatteningsFlushed: number;
    link: GraphRef;
    rootSink: SubscriptionRef | undefined;
    sentinel: GraphRef;
    sink: SubscriptionRef | undefined;
    sources: SubscriptionRef[];
    sourcesFlushed: number;
}
export declare function getGraphRef(ref: SubscriberRef): GraphRef;
export declare class GraphPlugin extends BasePlugin {
    private flushIntervalId_;
    private flushQueue_;
    private keptDuration_;
    private notifications_;
    private sentinel_;
    constructor({ keptDuration }?: {
        keptDuration?: number;
    });
    afterNext(ref: SubscriptionRef, value: any): void;
    afterSubscribe(ref: SubscriptionRef): void;
    afterUnsubscribe(ref: SubscriptionRef): void;
    beforeNext(ref: SubscriptionRef, value: any): void;
    beforeSubscribe(ref: SubscriberRef): void;
    beforeUnsubscribe(ref: SubscriptionRef): void;
    teardown(): void;
    private flush_;
}