import { Spy } from "../spy-interface";
import { SubscriberRef, SubscriptionRef } from "../subscription-ref";
import { BasePlugin } from "./plugin";
export interface Stats {
    completes: number;
    errors: number;
    flattenedSubscribes: number;
    leafSubscribes: number;
    maxDepth: number;
    nexts: number;
    rootSubscribes: number;
    subscribes: number;
    tick: number;
    timespan: number;
    totalDepth: number;
    unsubscribes: number;
}
export declare class StatsPlugin extends BasePlugin {
    private spy_;
    private stats_;
    private time_;
    constructor(spy: Spy);
    afterSubscribe(ref: SubscriptionRef): void;
    beforeComplete(ref: SubscriptionRef): void;
    beforeError(ref: SubscriptionRef, error: any): void;
    beforeNext(ref: SubscriptionRef, value: any): void;
    beforeSubscribe(ref: SubscriberRef): void;
    beforeUnsubscribe(ref: SubscriptionRef): void;
    get stats(): Stats;
    private all_;
}