import { PipeTransform } from '@angular/core';
import { IsDate } from './is-date.pipe';
import * as i0 from "@angular/core";
export declare class IsDateBefore<T extends Date | number | string> extends IsDate<T> implements PipeTransform {
    transform(value: T, dateBefore: T): boolean;
    static ɵfac: i0.ɵɵFactoryDeclaration<IsDateBefore<any>, never>;
    static ɵpipe: i0.ɵɵPipeDeclaration<IsDateBefore<any>, "isDateBefore", true>;
}