export interface MeterSnapshot {
    count: number;
    currentRate: number;
    mean: number;
}
declare class Meter {
    private count;
    private readonly windowMs;
    private events;
    private readonly startedAt;
    mark(): void;
    toJSON(): MeterSnapshot;
}
export declare class MetricsCollection {
    private readonly meters;
    meter(name: string): Meter;
    toJSON(): Record<string, MeterSnapshot>;
}
export declare const createCollection: () => MetricsCollection;
export {};
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