import { DeepstreamPlugin, DeepstreamServices } from '@deepstream/types';
interface HeapSnapshotOptions {
    interval: number;
    outputDir: string;
}
/**
 * This plugin will log the handshake data on login/logout and send a custom event to the logged-in
 * client.
 */
export default class HeapSnapshot extends DeepstreamPlugin {
    private options;
    private services;
    description: string;
    private logger;
    private snapshotInterval;
    constructor(options: HeapSnapshotOptions, services: Readonly<DeepstreamServices>);
    init(): void;
    whenReady(): Promise<void>;
    close(): Promise<void>;
    private outputHeapSnapshot;
}
export {};