interface GetTCPPortOptions {
    waitTimeInSeconds?: number;
    maxTries?: number;
}
/**
 * Returns an available port in the current environment.
 *
 * @param preferredPort - Number of the preferred port to be used if available.
 * @param options - Extra configuration for getting TCP ports.
 * @returns A promise that resolves with an availabe port.
 */
export declare function getAvailableTCPPort(preferredPort?: number, options?: GetTCPPortOptions): Promise<number>;
/**
 * Checks if a port is available.
 *
 * @param portNumber - The port number to check.
 * @returns A promise that resolves with a boolean indicating if the port is available.
 */
export declare function checkPortAvailability(portNumber: number): Promise<boolean>;
export {};