import { Clock, TimeUnit } from "../util/TimeUtil";
import { Metric } from "./Metric";
import { MetricRegistry } from "./MetricRegistry";
export interface Timer extends Metric {
    count(): number;
    totalTime(unit: TimeUnit): number;
    max(unit: TimeUnit): number;
    mean(unit: TimeUnit): number;
    record(amount: number, unit: TimeUnit): void;
}
export declare class TimerBuilder {
    private name;
    private _tags;
    constructor(name: string);
    tags(tags: {
        [key: string]: string;
    }): TimerBuilder;
    tag(key: string, value: string): this;
    register(registry: MetricRegistry): Timer;
}
export declare class TimerSample {
    private startTime;
    private _clock;
    private static defaultClock;
    constructor(clock: Clock);
    static start(clock?: Clock): TimerSample;
    stop(timer: Timer): void;
}
export declare function isTimerMetric(metric: Metric): metric is Timer;