import { StaticProvider } from '@angular/core';
import { AbstractControl, CheckboxRequiredValidator as NgCheckboxRequiredValidator, ValidationErrors } from '@angular/forms';
import * as i0 from "@angular/core";
export declare const CHECKBOX_REQUIRED_VALIDATOR: StaticProvider;
export declare class CheckboxRequiredValidator extends NgCheckboxRequiredValidator {
    validate(control: AbstractControl): ValidationErrors | null;
    static ɵfac: i0.ɵɵFactoryDeclaration<CheckboxRequiredValidator, never>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<CheckboxRequiredValidator, "input[type=checkbox][required][ngxAccessor]", never, {}, {}, never, never, true, never>;
}