import { ValidatorFn } from '@angular/forms';
import { DateIntervalDescriptor, Timestamp } from '@angular-ru/cdk/typings';
export declare type DateIntervalValidatorDescriptor = DateIntervalDescriptor;
export declare function dateMaxIntervalValidator(intervalLimit: Timestamp, descriptor: DateIntervalValidatorDescriptor): ValidatorFn;
export declare function dateMinIntervalValidator(intervalLimit: Timestamp, descriptor: DateIntervalValidatorDescriptor): ValidatorFn;
export declare function orderedIntervalValidator({ dateFromKey, dateToKey }: DateIntervalValidatorDescriptor): ValidatorFn;
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