/**
 * Returns a Promise that resolves when the given port has a process
 * running on it. If no process is established on the given port
 * within the timeout window, the returned promise rejects.
 *
 * @example
 * await waitForPort(3000)
 */
export declare function waitForPort(port: number, options?: {
    timeout?: number;
    retryInterval?: number;
    maxRetries?: number;
}): Promise<void>;