/**
 * Constant for unavailable values in parser results.
 */
export declare const USER_AGENT_PARSER_UNAVAILABLE = "Unavailable";
/**
 * [[UserAgentParser]] is responsible to parse the browser's user agent
 * and provide the parsed result.
 */
export default interface UserAgentParser {
    /**
     * Provides resultant data after parsing browser user agent.
     */
    getParserResult(): {
        [key: string]: string;
    };
    /**
     * Updates internal values using the
     * {@link https://developer.mozilla.org/en-US/docs/Web/API/NavigatorUAData/getHighEntropyValues | User-Agent Client Hints API}.
     * If the API is not available, resolves without making changes.
     *
     * @param alwaysOverride If true, always override internal values even if already set.
     *   Examples of value changes:
     *   - osName: "Mac OS" → "macOS"
     *   - osVersion: "10.15" → "10.15.7"
     *   - browserName: "Chrome" → "Google Chrome"
     *   - browserVersion: "120" → "120.0.6099.129"
     * @returns Promise that resolves when update is complete
     */
    updateWithHighEntropyValues?(alwaysOverride: boolean): Promise<void>;
}