import * as promClient from "prom-client";
export declare class Metrics {
    private prefix;
    private register;
    private defaultMetricsIntv;
    private metrics;
    constructor(prefix?: string);
    exportType(): string;
    exportMetrics(): string;
    getRegister(): promClient.Registry;
    private getCounter;
    private getGauge;
    inc(key: string, val?: number): void;
    set(key: string, val: number): void;
    registerDefault(): void;
    close(): void;
}
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