declare class PortFinder {
    #private;
    private constructor();
    static getInstance(): PortFinder;
    /**
     * Returns the first available open port, caching and reusing it for subsequent calls.
     *
     * @returns {Promise<number>} A promise that resolves to the open port number.
     */
    getOpenPort(): Promise<number>;
    setPort(port: number): void;
}
export declare const portFinder: PortFinder;
export {};