import { AbstractControl, ValidationErrors, ValidatorFn } from '@angular/forms';
/**
 * Provides a set of additional validators used by form controls.
 *
 * A validator is a function that processes a FormControl or collection of
 * controls and returns a map of errors. A null map means that validation has passed.
 */
export declare class TerraValidators {
    static decimal(maxLength: number, decimals: number): ValidatorFn;
    static iban(control: AbstractControl): ValidationErrors | null;
    static uniqueValues(uniqueKeys?: Array<string>): ValidatorFn;
}