/**
 * Checks if a given string is an IP address (IPv4 or IPv6).
 * This is a pragmatic check; it doesn't validate the IPv6 format strictly,
 * but aims to differentiate IP addresses from hostnames.
 * This function should be called with a string that does NOT contain a port number.
 *
 * @param {string} str The string to check.
 * @returns {boolean} `true` if the string is considered an IP address, otherwise `false`.
 */
export declare function isIpAddress(str: string): boolean;