import { AbstractControl, ValidationErrors, ValidatorFn } from '@angular/forms';
/**
 * Custom from  validators
 */
export declare class AsiValidators {
    static email(control: AbstractControl): ValidationErrors | null;
    static minDateFromControl(minDateControl: AbstractControl): ValidatorFn;
    static maxDateFromControl(maxDateControl: AbstractControl): ValidatorFn;
    static dateFormat(control: AbstractControl): ValidationErrors | null;
    static fileSize(maxSize: number): ValidatorFn;
    static fileExtension(extensions: Array<String>): ValidatorFn;
}