import { AttributeType } from '../../../model/data/BacktraceData';
export declare class MetricsEvent {
    readonly metricGroupName: string;
    readonly metricGroupValue: string | string[];
    readonly attributes: Record<string, AttributeType>;
    readonly id: string;
    constructor(metricGroupName: string, metricGroupValue: string | string[], attributes?: Record<string, AttributeType>);
    toJSON(): {
        [x: string]: string | number | string[] | Record<string, AttributeType>;
        timestamp: number;
        attributes: Record<string, AttributeType>;
    };
}