import { AbstractControl } from '@angular/forms';
export declare type ControlFactory = () => AbstractControl;
/**
 * Recursively sets values of nested controls so nested object === null/undefined
 * does not cause failure as in case of AbstractControl.patchValue
 * @param control target FormControl, FormArray or FormGroup
 * @param value source data
 */
export declare function safeSetValue(control: AbstractControl, value: any): void;