import type { ValidationOptions } from 'class-validator';
import type { Duration, DurationUnitsObjectType, DurationUnitType } from 'dayjs/plugin/duration';
/** @hidden */
export declare const MAX_DURATION = "maxDuration";
/**
 * Checks if the given value is a valid Dayjs duration not longer than `maximum`.
 *
 * The minimum can be given as either:
 *   - a Dayjs duration
 *   - an ISO 8601 string, e.g. `"PT1H"`
 *   - a units object, e.g. `{ hour: 1, minute: 30 }`
 *   - a time/unit tuple, e.g. `[1, 'hour]`
 *
 * #### Example
 * ```typescript
 * // Ensure the value is a duration at most 1 hour long
 * @MaxDuration([1, 'hour'], { inclusive: true })
 * value: Duration
 * ```
 *
 * @category Dayjs
 * @param maximum The maximum allowed value.
 * @param options
 * Accepts the following options (in addition to generic class-validator options):
 *   - `inclusive: boolean = false`
 *     If true, allow the `maximum` duration as well.
 */
export declare function MaxDuration(maximum: Duration | string | DurationUnitsObjectType | [time: number, unit?: DurationUnitType], options?: {
    inclusive?: boolean;
} & ValidationOptions): PropertyDecorator;