import { ChangeDetectorRef } from '@angular/core';
import { AbstractControl, NgControl } from '@angular/forms';
import { Observable } from 'rxjs';
/**
 * Syncs the outer and inner controls for validity, errors, dirty, and touched states.
 * Used in components that implement ControlValueAccessor
 */
export declare function syncOuterAndInnerControls(ngControl: NgControl, innerControls: AbstractControl[], changeDetectorRef: ChangeDetectorRef, destroy$: Observable<boolean>): void;
export declare function syncOuterToInnerErrors(ngControl: NgControl, innerControls: AbstractControl[], changeDetectorRef: ChangeDetectorRef, destroy$: Observable<boolean>): void;
export declare function syncOuterAndInnerTouched(ngControl: NgControl, innerControls: AbstractControl[], changeDetectorRef: ChangeDetectorRef, destroy$: Observable<boolean>): void;
export declare function syncOuterAndInnerDirty(ngControl: NgControl, innerControls: AbstractControl[], changeDetectorRef: ChangeDetectorRef, destroy$: Observable<boolean>): void;