import { AbstractControl, ValidationErrors, ValidatorFn } from '@angular/forms';
export declare abstract class CustomValidators {
    static phoneNumber(control: AbstractControl): ValidationErrors | null;
    static number(control: AbstractControl): ValidationErrors | null;
    static validZipCode(control: AbstractControl): ValidationErrors | null;
    static confirmStringMatch(field1: string, field2: string): ValidatorFn;
    static minAge(minAge: number): ValidatorFn;
    static maxAge(maxAge: number): ValidatorFn;
}