import { AbstractControl } from "@angular/forms";
/**
 * This is the only way to be notified of the parent form control being "touched"
 * We replace the parent formControl method with our own implementation that also calls the original function
 * @param formControl
 * @param callback Run this callback when the `formControl.markAsTouched` is run
 */
export declare function onMarkAsTouched(formControl: AbstractControl, callback: Function): void;