export declare class Duration {
    private totalSeconds;
    private constructor();
    /**
     * Creates a Duration instance from a given number of seconds.
     *
     * @param seconds - The number of seconds for the duration.
     * @returns A Duration instance representing the specified duration.
     */
    static fromSeconds(seconds: number): Duration;
    /**
     * Creates a Duration instance from a given number of minutes.
     *
     * @param minutes - The number of minutes for the duration.
     * @returns A Duration instance representing the specified duration.
     */
    static fromMinutes(minutes: number): Duration;
    /**
     * Gets a Duration instance representing zero duration (0 hours, 0 minutes, 0 seconds).
     *
     * @returns A Duration instance representing zero duration.
     */
    static zero(): Duration;
    /**
     * Converts the duration instance to a string in "HH:MM:SS" format.
     *
     * @returns A string representing the duration.
     */
    toString(): string;
    /**
     * Gets the duration as the number of seconds.
     *
     * @returns The duration in seconds.
     */
    toSeconds(): number;
    /**
     * Adds another Duration to this instance and returns the result as a new Duration.
     *
     * @param other - The other Duration to add.
     * @returns A new Duration instance representing the sum.
     */
    add(other: Duration): Duration;
    /**
     * Subtracts another Duration from this instance and returns the result as a new Duration.
     * If the result would be negative, it returns a Duration of 0 seconds.
     *
     * @param other - The other Duration to subtract.
     * @returns A new Duration instance representing the difference.
     */
    subtract(other: Duration): Duration;
}