import EventEmitter from "../../utils/event-emitter.js";
/**
 * A small factory event emitter used for debug/performance hooks. It emits
 * `start`, `success` and `failure` events carrying the factory name, strategy,
 * requested traits, a per-invocation correlation id and (on completion) a
 * duration. It deliberately never emits resolved attribute values, which may
 * contain secrets.
 */
export default class FactoryEventEmitter extends EventEmitter {
    /** @type {number} - Monotonic invocation counter for correlation ids. */
    _invocationCounter: number;
    /** Builds the emitter. */
    constructor();
    /**
     * Allocates the next per-invocation correlation id.
     * @returns {string} - A unique-per-registry correlation id.
     */
    nextInvocationId(): string;
}
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