/**
 * Defines a range in time that may be
 * - fixed, i.e., `start` and `end` are absolute timestamps (both inclusive), or
 * - dynamic, i.e., `end` is always `now()` or `now() - offset`.
 */
export declare class TimeRange {
    /** The duration of this time range. */
    readonly duration: Duration;
    /** The offset from `now()` if this time range has a dynamic offset. */
    readonly offset?: Duration;
    /**
     * The end timestamp.
     *
     * - If this is a positive integer, it is a fixed end timestamp for the time range.
     * - If this is `undefined` and `offset` is also `undefined, the time range always ends `now()`.
     * - If this is `undefined` and `offset` is set, the time range ends at `now() - offset`.
     */
    private endTimestamp?;
    /**
     * The Unix timestamp in milliseconds precision when this time range starts (inclusive).
     *
     * This value is computed using `end` and `duration`.
     */
    get start(): number;
    /**
     * The Unix timestamp in milliseconds precision when this time range ends (inclusive)
     */
    get end(): number;
    /**
     * Creates a new `TimeRange` with the dynamic values:
     * - `start = now() - duration`
     * - `end = now()`
     */
    static fromDuration(duration: Duration): TimeRange;
    /**
     * Creates a new `TimeRange` with the dynamic values:
     * - `start = end() - duration`
     * - `end = now() - offset`
     */
    static fromDurationWithOffset(offset: Duration, duration: Duration): TimeRange;
    /**
     * Creates a new `TimeRange` with the specified `duration` that always ends `now()`.
     *
     * @param duration The `Duration` of this time range.
     */
    constructor(duration: Duration);
    /**
     * Creates a new `TimeRange` with the specified `duration` that always ends `now() - offset`.
     *
     * @param duration The `Duration` of this time range.
     * @param offset The offset from `now()`, at which this time range should end.
     */
    constructor(duration: Duration, offset: Duration);
    /**
     * Creates a new `TimeRange` with the specified `duration` and a fixed `end` timestamp.
     *
     * @param duration The `Duration` of this time range.
     * @param end The Unix timestamp, at which the time range ends (inclusive).
     */
    constructor(duration: Duration, end: number);
    /**
     * @returns `true` if this time range always ends `now()`, i.e., at the time it is evaluated,
     * otherwise `false`.
     */
    endsNow(): boolean;
}
/**
 * Defines a time duration with millisecond precision.
 */
export declare class Duration {
    /** The duration in milliseconds. */
    readonly valueMs: number;
    static fromHours(hours: number): Duration;
    static fromMinutes(minutes: number): Duration;
    static fromSeconds(seconds: number): Duration;
    static fromMilliseconds(ms: number): Duration;
    protected constructor(valueMs: number);
}