export interface Options {
    /**
     * A preferred port or an array of preferred ports to use.
     */
    port?: number | ReadonlyArray<number>;
    /**
     * The host on which port resolution should be performed. Can be either an IPv4 or IPv6 address.
     */
    host?: string;
}
export default _default;
declare function _default(options?: Options): Promise<number>;
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