import { AbstractControl, FormArray, FormGroup } from '@angular/forms';
/**
 * Method return boolean value depends on input control requirement
 */
export declare function hasRequiredValidator(abstractControl: AbstractControl): boolean;
/**
 * Method validates if all control of the input form group are valid
 * If not, it marks them touched to trigger required validation procedures
 * @param formGroup
 */
export declare function markAllFormFieldsAsTouched(formGroup: FormGroup | FormArray): void;