import { DateTime } from '../../date-time';
import { IFrequencyRuleOptions } from './01-frequency.pipe';
import { IPipeRule, IPipeRunFn, PipeRule } from './interfaces';
/**
 * The `RevFrequencyPipe` is the first pipe in the chain of rule pipes. It is
 * responsible for incrementing the date, as appropriate, while taking into
 * account the `RRULE` frequency and interval.
 */
export declare class RevFrequencyPipe extends PipeRule<IFrequencyRuleOptions> implements IPipeRule<IFrequencyRuleOptions> {
    private readonly intervalUnit;
    private intervalEndDate;
    private intervalStartDate;
    run(args: IPipeRunFn): DateTime | null;
    private normalizedEndDate;
    private normalizedStartDate;
    private decrementInterval;
    private skipToIntervalOnOrBefore;
    private dateIsWithinInterval;
}
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