import { ECSContext } from "./ecs";
import EventEmitter from "../utils/eventEmitter";
export type MetricsKey = string | number;
export type MetricsRecord = Record<string, number>;
export declare class Metrics extends EventEmitter<null> {
    private ctx;
    private data;
    private toStableIdIfNumber;
    private ensure;
    private getOrchestratorKey;
    private deduped;
    private fireEvents;
    /**
     * Sync metrics from this resource to MetricsStore for an entity.
     * This ensures metrics are persisted during serialization.
     * @param eid Entity ID to sync metrics for
     */
    private syncToStore;
    constructor(ctx: ECSContext);
    getListenerKey(entity: MetricsKey, metric?: string, type?: string): string;
    get(entity: MetricsKey, metric: string, type?: string): number;
    set(entity: MetricsKey, metric: string, value: number): void;
    set(entity: MetricsKey, metric: string, type: string, value: number): void;
    increment(entity: MetricsKey, metric: string): void;
    increment(entity: MetricsKey, metric: string, delta?: number): void;
    increment(entity: MetricsKey, metric: string, type: string, delta?: number): void;
    keys(entity: string): string[];
    types(entity: string, metric: string): string[];
}
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