import { MetricRecord } from '@opentelemetry/metrics';
import { PrometheusCheckpoint } from './types';
export declare class PrometheusSerializer {
    private _prefix;
    private _appendTimestamp;
    constructor(prefix?: string, appendTimestamp?: boolean);
    serialize(checkpointSet: PrometheusCheckpoint[]): string;
    serializeCheckpointSet(checkpoint: PrometheusCheckpoint): string;
    serializeRecord(name: string, record: MetricRecord): string;
}