import { ChangeDetectorRef, ElementRef, Injector } from '@angular/core';
import { FormGroupDirective, NgForm } from '@angular/forms';
import { ValueAccessor } from './value-accessor';
export declare class BooleanValueDirective extends ValueAccessor {
    constructor(parentForm: NgForm, parentFormGroup: FormGroupDirective, element: ElementRef, injector: Injector, changeRef: ChangeDetectorRef);
    writeValue(value: any): void;
    onAnjChange(value: any): void;
}